Ludwik Adamowicz

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Dr. Ludwik Adamowicz is currently Professor in the Department of Chemistry and Biochemistry. Dr. Adamowicz has worked with the Department for 26 years in the area of physical chemistry. His research intrests has been focused on the development and application of quantum chemical theoretical methods for more accurate determination of the stationary and dynamic quantum states of molecular systems. The methodological development has comprised theory formulation, computational implementation and application calculations. The considerable recent progress in the computational capabilities of both hardware and software opens a unique opportunity to employ new theoretical techniques to larger polyatomic molecules, leading to more reliable predictions of their properties and structures.Dr. Adamowicz was born in Warsaw, Poland where he lived an conducted his master's studies at Warsaw University. He received his Ph.D at the Institute of Physical Chemistry at the Polish Academy of Sciences. Prior to his appointment with the University of Arizona, Dr. Adamowicz conduced post-doctoral work at Utah State University and the University of Florida before moving to Tucson.

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Courses

IQC
Introduction to Quantum Chemistry
BC
Biophysical Chemistry
ST
Statistical Thermodynamics
PC
Physical Chemistry

QC
Quantum Chemistry

Student Thesis/Dissertation

Explicitly Correlated Gaussian Functions and Rovibrational Spectra of Diatomic Molecules
2018
doctoral
Advances in Modeling of Physical Systems Using Explicitly Correlated Gaussian Functions
2016
doctoral

Very Accurate Quantum Mechanical Non-Relativistic Spectra Calculations of Small Atoms & Molecules Employing All-Particle Explicitly Correlated Gaussian Basis Functions
2015
doctoral

Grants

Attosecond Quantum Dynamics Beyond the Born-Oppenheimer Approximation
Principal Investigator (PI)
2023
$33.4K
Active
A Multireference Coupled-Cluster Method for Ground and Excited States Calculations of Interstellar Molecules
Principal Investigator (PI)
2019
$435.0K
Active
Attosecond Quantum Dynamics Beyond the Born-Oppenheimer Approximation
Principal Investigator (PI)
2021
$59.8K
I-Corps: Highly-Accurate Chemical Simulations For The Energy Storage Industry
Principal Investigator (PI)
2021
$50.0K
Catalyzing New International Collaboration. US-Taiwan Collaboration of Experimental and Theoretical Study of Rovibrational Spectra of Small Hydrogen-containing Molecules and Ions.
Principal Investigator (PI)
2015
$32.3K

EAGER: Mattressene - A 3D Carbon Nanostructure Superlattice: Experimental and Theoretical Synthesis and Characterization
Co-Investigator (COI)
2011
$149.9K

Technologies / Patents

News

H3+: The Molecule that Made the Universe
2012
Biology and Electronics May Soon Meet Inside Your MP3 player
2006

Research Group Will Use Proteins to 'Grow' Microchip Circuits
2003

Publications (468)

Recent

Prediction of su1 suP Rydberg energy levels of beryllium based on calculations with explicitly correlated Gaussians
2014
Accurate potential energy curve of the LiH su+ su molecule calculated with explicitly correlated Gaussian functions
2014
Charge asymmetry in the rovibrationally excited HD molecule
2014
Charge asymmetry and relativistic corrections in pure vibrational states of the HD su+ su ion
2014
Computations on metallofullerenes derivatized during extraction: La@C sub 80 sub C sub 6 sub H sub 3 sub Cl sub 2 sub and La@C sub 82 sub C sub 6 sub H sub 3 sub Cl sub 2 sub
2014
Erratum: Lifetimes of rovibrational levels of HD Physical Review A Atomic, Molecular, and Optical Physics A 2014) 89 012513)
2014
Lifetimes of rovibrational levels of HD
2014
Sm@C sub 74 sub Computed relative isomeric populations
2014
Towards relative populations of non-isomeric metallofullerenes: La@C sub 76 sub vs. La sub 2 sub C sub 76 sub 17490)
2014
Theory and application of explicitly correlated Gaussians
2013
Conformational composition of neutral leucine. Matrix isolation infrared and ab initio study
2013
Molecular relativistic corrections determined in the framework where the born-oppenheimer approximation is not assumed
2013
Vibrationally and rotationally nonadiabatic calculations on H sub 3 sub su+ su using coordinate-dependent vibrational and rotational masses
2013
Prediction of su2 suD Rydberg energy levels of su6 suLi and su7 suLi based on very accurate quantum mechanical calculations performed with explicitly correlated Gaussian functions
2013
Charge asymmetry in rovibrationally excited HD su+ su determined using explicitly correlated all-particle Gaussian functions
2013
An algorithm for non-Born-Oppenheimer quantum mechanical variational calculations of N 1 rotationally excited states of diatomic molecules using all-particle explicitly correlated Gaussian functions
2013
Born-oppenheimer and non-born-oppenheimer, atomic and molecular calculations with explicitly correlated gaussians
2013
Analytical energy gradient used in variational Born-Oppenheimer calculations with all-electron explicitly correlated Gaussian functions for molecules containing one π electron
2013
Selection of a Gaussian basis set for calculating the Bethe logarithm for the ground state of the hydrogen atom
2013
An algorithm for quantum mechanical finite-nuclear-mass variational calculations of atoms with L 3 using all-electron explicitly correlated Gaussian basis functions
2013
Stability calculations for Eu@C sub 74 sub isomers
2013
Non-Born-Oppenheimer method for direct variational calculations of diatomic first excited rotational states using explicitly correlated all-particle Gaussian functions
2013
Molecular dipole static polarisabilities and hyperpolarisabilities of conjugated oligomer chains calculated with the local π-electron coupled cluster theory
2013
Assessment of the accuracy the experimental energies of the su1 suP suo su 1s su2 su2s6and 1s su2 su2s7states of su9 suBe based on variational calculations with explicitly correlated Gaussians
2012
Accurate potential energy curves for HeH+ isotopologues
2012
Stability computations for isomers of La@C sub n sub n 72, 74, 76)
2012
Noncovalent interaction of methylene blue with carbon nanotubes: Theoretical and mass spectrometry characterization
2012
Precision measurements and computations of transition energies in rotationally cold triatomic hydrogen ions uto the midvisible spectral range
2012
Tautomeric transitions of isocytosine isolated in argon and neon matrices induced by UV irradiation
2012
Progress in calculating the potential energy surface of H sub 3 sub su+ su
2012
UV-induced isomerization of β-alanine isolated in argon matrices
2012
Very accurate potential energy curve of the He sub 2 sub su+ su ion
2012
Calibration-quality adiabatic potential energy surfaces for H sub 3 sub su+ su and its isotopologues
2012
Explicitly correlated gaussian calculations of the 2D Rydberg states of the boron atom
2012
Calculated relative yields for Sc sub 2 sub S@C sub 82 sub and Y sub 2 sub S@C sub 82 sub
2011
Correlated-Gaussian calculations of the ground and low-lying excited states of the boron atom
2011
Computed stabilities in metallofullerene series: Al@C sub 82 sub Sc@C sub 82 sub Y@C sub 82 sub and La@C sub 82 sub
2011
Calculations of metallofullerene yields
2011
Accurate variational calculations of the ground su2 suP suo su(1s su2 su2s su2 su2p) and excited su2 suS(1s su2 su2s2 su2 su) and su2 suP suo su(1s su2 su2s su2 su3p) states of singly ionized carbon atom
2011
Complete pure vibrational spectrum of HD calculated without the Born-Oppenheimer approximation and including relativistic corrections
2011
Very accurate potential energy curve of the LiH molecule
2011
Accurate non-Born-Oppenheimer calculations of the complete pure vibrational spectrum of D sub 2 sub with including relativistic corrections
2011
State-specific multireference coupled-cluster theory of molecular electronic excited states
2011
Vibrational transitions of the su7 suLiH su+ su ion calculated without the Born-Oppenheimer approximation and with leading relativistic corrections
2011
Noncovalent interaction of single-walled carbon nanotubes with 1-pyrenebutanoic acid succinimide ester and glucoseoxidase
2011
Refinement of the experimental energy levels of higher su2 suD Rydberg states of the lithium atom with very accurate quantum mechanical calculations
2011
Exponentially and pre-exponentially correlated Gaussians for atomic quantum calculations
2011
1D states of the beryllium atom: Quantum mechanical nonrelativistic calculations employing explicitly correlated Gaussian functions
2011
Lower Rydberg 2D states of the lithium atom: Finite-nuclear-mass calculations with explicitly correlated Gaussian functions
2011
An algorithm for calculating atomic D states with explicitly correlated gaussian functions
2011
Accurate non-Born-Oppenheimer calculations of the lowest vibrational energies of D sub 2 sub and T sub 2 sub with including relativistic corrections
2010
Optimized virtual orbital space OVOS) in coupled-cluster calculations
2010
Analytical energy gradient in variational calculations of the two lowest P3 states of the carbon atom with explicitly correlated Gaussian basis functions
2010
A calculation of spectroscopic parameters for hydrogen fluoride with multi-reference state-specific coupled-cluster method
2010
Isotope shifts of the 1s22s2(1S0) → 1s22p2(1S0) transition in the doubly ionized carbon ion C su2+ su
2010
Determination of deuteron quadrupole moment from calculations of the electric field gradient in D2 and HD
2010
Isotope shifts of the three lowest S1 states of the B+ ion calculated with a finite-nuclear-mass approach and with relativistic and quantum electrodynamics corrections
2010
Lower vibrational transitions of the su3 suHe su4 suHe su+ su ion calculated without the Born-Oppenheimer approximation and with leading relativistic corrections
2010
Raman spectroscopy and theoretical characterization of nanohybrids of porphyrins with carbon nanotubes
2010
Modeling hole transport in Wet and dry DNA
2010
Competition between counterions and active protein sites to bind bisquaternary ammonium groups. A combined mass spectrometry and quantum chemistry model study
2010
Accurate one-dimensional potential energy curve of the linear H sub 2 sub sub 2 sub cluster
2010
Non-adiabatic corrections to the energies of the pure vibrational states of H sub 2 sub
2009
High-accuracy calculations of the ground, 1 1A1' and the 2 1A1' 2 3A1' and 1 1E' excited states of H3+
2009
Five lowest S1 states of the Be atom calculated with a finite-nuclear-mass approach and with relativistic and QED corrections
2009
How to calculate H3 better
2009
Multireference state-specific coupled-cluster methods. State-of-the-art and perspectives
2009
Fundamental vibrational transitions of the H3 e H4 e+ and L7 iH+ ions calculated without assuming the Born-Oppenheimer approximation and with including leading relativistic corrections
2009
Isotope shift in the electron affinity of lithium
2009
Charge asymmetry in pure vibrational states of the HD molecule
2009
High-accuracy calculations of the ground, 1 su1 suA sub 1 sub ′, and the 2 su1 suA sub 1 sub ′,2 su3 suA sub 1 sub ′, and 1 su1 suE′, excited states of H sub 3 sub su+ su
2009
Non-Born-Oppenheimer calculations of the BH molecule
2009
Algorithm for quantum-mechanical finite-nuclear-mass variational calculations of atoms with two electrons using all-electron explicitly correlated Gaussian basis functions
2009
Raman spectroscopy study and first-principles calculations of the interaction between nucleic acid bases and carbon nanotubes
2009
Calculations of low-lying P1 states of the beryllium atom
2009
Rotational states of dipole-bound anions of hydrogen cyanide
2009
New more accurate calculations of the ground state potential energy surface of H(3)
2009
Dipole polarizabilities and hyperpolarizabilities of the small conjugated systems in the π-electron coupled cluster theory
2009
Chloromethane and dichloromethane decompositions inside nanotubes as models of reactions in confined space
2009
Non-Born-Oppenheimer calculations of the lowest vibrational energy of HD including relativistic corrections
2009
Stabilities of fullerenes: Illustration on C sub 80 sub
2008
Erratum to Structures, stabilities and tautomerizations of uracil and diphosphouracil tautomers Chem. Phys. 332 2007) 152-161] DOI:10.1016/j.chemphys.2006.10.026)
2008
The hydroxyacetone CH sub 3 sub COCH sub 2 sub OH) torsional potential and isomerization: A theoretical study
2008
Computations on three isomers of La@C sub 74 sub
2008
SWNT-DNA and SWNT-polyC hybrids: AFM study and computer modeling
2008
Altering the orientation of proteins on self-assembled monolayers: A computational study
2008
Accuracy limits on the description of the lowest S excitation in the Li atom using explicitly correlated Gaussian basis functions
2008
Orbit-orbit relativistic corrections to the pure vibrational non-Born-Oppenheimer energies of H(2)
2008
Computational screening of metallofullerenes for nanoscience: Sr@C74
2008
Accurate Born-Oppenheimer calculations of the low-lying c su3 su∑ sub g sub su+ su and a su3 su∑ sub u sub su+ su excited states of helium dimer
2008
Pre-resonance Raman and IR absorption spectroscopy of imidazophenazine and its derivatives: Experimental and ab initio study
2008
Stacking interaction of cytosine with carbon nanotubes: MP2, DFT and Raman spectroscopy study
2008
Energy and energy gradient matrix elements with N particle explicitly correlated complex Gaussian basis functions with L=1
2008
Three lowest S states of B9 e+ calculated with including nuclear motion and relativistic and QED corrections
2008
A generalization of the state-specific complete-active-space coupled-cluster method for calculating electronic excited states
2008
Li sub x sub C sub 60 sub Calculations of the encapsulation energetics and thermodynamics
2008
MPWB1K calculations of stepwise encapsulations: Li sub x sub C sub 60 sub
2008
Fullerene as an electron buffer: Charge transfer in Li@C sub 60 sub
2007
Calculations on endohedral C sub 74 sub complexes
2007
Computations of production yields for Ba@C74 and Yb@C74
2007
Calculations of the ground states of BeH and Be H+ without the Born-Oppenheimer approximation
2007
Electron Attachment to DNA Base Complexes
2007
Stabilization of an excess electron on molecular surfaces by a pair of water molecules
2007
Nanoscale molecular surface electron attachment
2007
Improved calculations of the lowest vibrational transitions in He H+
2007
Functionalization of carbon nanocones by free radicals: A theoretical study
2007
Ionization potential of Be9 calculated including nuclear motion and relativistic corrections
2007
Relativistic corrections to the ground-state energy of the positronium molecule
2007
QSRR study for gas and liquid chromatographic retention indices of polyhalogenated biphenyls using two 2D descriptors
2007
Lowest excitation energy of Be9
2007
Noncovalent complexes of tetramethylammonium with chlorine anion and 2,5-dihydroxybenzoic acid as models of the interaction of quaternary ammonium biologically active compounds with their molecular targets: A theoretical study
2007
Relativistic corrections to the non-Born-Oppenheimer energies of the lowest singlet Rydberg states of He3 and He4
2007
Electron affinities, gas phase acidities, and potential energy curves: Benzene
2007
Structures, stabilities and tautomerizations of uracil and diphosphouracil tautomers
2007
Sugar synthesis from a gas-phase formose reaction
2007
State-specific multireference complete-active-space coupled-cluster approach versus other quantum chemical methods: Dissociation of the N2 molecule
2007
Electron affinity of Li7 calculated with the inclusion of nuclear motion and relativistic corrections
2007
Non-born-oppenheimer calculations of the ground state of H sub 3 sub
2007
A molecular dynamics calculations of hole transfer rates in DNA strands
2007
Hydration of excess electrons trapped in charge pockets on molecular surfaces
2007
Lowest vibrational states of He4 He+3: Non-Born-Oppenheimer calculations
2007
Theoretical modeling of the nonenzymatic solvolysis of CMP-NeuAc in an acidic environment
2007
Computing relative stabilities of metallofullerenes by Gibbs energy treatments
2007
Computational study of molecular properties of aggregates of C sub 60 sub and 16, 0) zigzag nanotube
2007
Relative stabilities of Cisomers
2007
Formation of glyoxal in hydroxyacetaldehyde and glycine nonenzymatic browning Maillard reaction: A computational study
2007
Theoretical, empirical and experimental electron affinities of SF sub 6 sub solving the density functional enigma
2007
Computed structures and relative stabilities of Be@C sub 74 sub
2007
The water mediated ring closing in the formose reaction
2007
Conformational topology of ribose: A computational study
2006
IR spectra of photopolymerized C sub 60 sub films. Experimental and density functional theory study
2006
Darwin and mass-velocity relativistic corrections in non-Born-Oppenheimer variational calculations
2006
Trapping excess electrons in molecular charge pockets on surfaces
2006
Darwin and mass-velocity relativistic corrections in the non-Born-Oppenheimer calculations of pure vibrational states of H sub 2 sub
2006
The uracil dimer and trimer covalent anions: An ab initio study
2006
Prediction of gas chromatographic retention indices of benzene dicarboxylic diesters using novel topological indices
2006
Multireference state-specific coupled cluster approach with the CAS reference: Inserting Be into H sub 2 sub
2006
Matrix elements of N-particle explicitly correlated Gaussian basis functions with complex exponential parameters
2006
Nonrelativistic variational calculations of the positronium molecule and the positronium hydride
2006
H-bonded complexes of 2-aminopyrimidine-parabenzoquinone in an argon matrix
2006
Convergence of experiment and theory on the pure vibrational spectrum of HeH+
2006
Molecular dynamics studies of protein-fragment models encapsulated into carbon nanotubes
2006
Potential energy surface of the electron excited states in the state-specific multi-reference coupled cluster theory. Hydrogen fluoride dissociation
2006
Non-Born-Oppenheimer variational calculation of the ground-state vibrational spectrum of LiH su+ su
2006
Dissociation of the fluorine molecule: CASCCSD method and other many-particle models
2006
Elastic and electronic properties of BeB sub 2 sub in comparison to superconducting MgB sub 2 sub and NbB sub 2 sub
2006
The electron bonded cytosine-guanine complex
2006
Evaluation of the reduction of imidazophenazine dye derivatives under fast-atom-bombardment mass-spectrometric conditions
2006
Excited electronic states and relative stabilities of C sub 80 sub isomers
2006
Excited states in the multireference state-specific coupled-cluster theory with the complete active space reference
2006
An accurate non-Born-Oppenheimer calculation of the first purely vibrational transition in LiH molecule
2005
Nucleus-nucleus correlation function in non-Born-Oppenheimer molecular calculations: Vibrationally excited states of HD su+ su
2005
Computing fullerene encapsulation of non-metallic molecules: N sub 2 sub C sub 60 sub and NH sub 3 sub C sub 60 sub
2005
Gibbs energy-based treatment of metallofullerenes: Ca@C sub 72 sub Ca@C sub 74 sub Ca@C sub 82 sub and La@C sub 82 sub
2005
Non-born-oppenheimer variational calculations of atoms and molecules with explicitly correlated Gaussian basis functions
2005
Vibrational spectroscopy of hydroxy-heterobiaryls. IR-active modes of 2,2′-bipyridyl]3,3′-diol
2005
Multireference state-specific coupled-cluster theory and multiconfigurationality index. BH dissociation
2005
Automated generation of coupled-cluster diagrams: Implementation in the multireference state-specific coupled-cluster approach with the complete-active-space reference
2005
Stabilization of the adenine covalent anion by micro-hydration: Theoretical study
2005
Computed structure and energetics of La@C sub 60 sub
2005
Modeling tubulin at interfaces. Immobilization of microtubules on self-assembled monolayers
2005
Isotope effects in dipole-bound anions of acetone
2005
Non-Born-Oppenheimer variational calculations of HT su+ su bound states with zero angular momentum
2005
S sub 0 sub and S sub 1 sub spectroscopy of jet cooled 9-cyano-10-methylanthracene: The methyl grouas a molecular rotor
2005
Non-Born-Oppenheimer calculations of the pure vibrational spectrum of HeH su+ su
2005
Charge asymmetry in HD su+ su
2005
Computational model of hole transport in DNA
2005
Non-Born-Oppenheimer molecular structure and one-particle densities for H2D+
2005
New indices for describing the multi-configurational nature of the coupled cluster wave function
2005
Integrals for non-Born-Oppenheimer calculations of molecules with three nuclei
2005
Non-Born-Oppenheimer study of positronic molecular systems: e su+ suLiH
2004
Interaction of the uracil dipole-bound electron with closed-shell systems Ar and N sub 2 sub
2004
Computations of the catalytic effects in the Stone-Wales fullerene isomerizations: N and CN agents
2004
Computations on C sub 84 sub O: Thermodynamic, kinetic and photochemical stability
2004
An excess electron trapped in molecular tweezers: Ab initio study
2004
An ab initio theoretical prediction: An antiaromatic ring π-dihydrogen bond accompanied by two secondary interactions in a wheel with a pair of pedals shaped complex FH⋯C sub 4 sub H sub 4 sub ⋯HF
2004
Molecular structure in non-Born-Oppenheimer quantum mechanics
2004
Stabilization of an excess electron on uracil by water. Ab initio study
2004
Nonrelativistic molecular quantum mechanics without approximations: Electron affinities of LiH and LiD
2004
Computing enthalpy-entropy interplay for isomeric fullerenes
2004
Spectroscopic studies of proton transfer in hydrogen bonding: Adenine complexed to HCl
2004
Electronic excited states and stabilities of fullerenes: Isomers of C sub 78 sub and Mg@C sub 72 sub
2004
Variational calculations of excited states with zero total angular momentum vibrational spectrum) of H sub 2 sub without use the Born-Oppenheimer approximation
2003
Uracil-adenine dimer connected by an excess electron
2003
Conformational behavior of cyanoacetic acid: A combined matrix isolation fourier transform infrared spectroscopy and theoretical study
2003
Combined matrix-isolation FT-IR and theoretical study of the intrinsic tautometric, vibrational, and H-bonding properties of N4-methoxycytosine
2003
Modelling of octahedral manganese II complexes with inorganic ligands: A problem with spin-states
2003
Missing conformers. Comparative study of conformational cooling in cyanoacetic acid and methyl cyanoacetate isolated in low temperature inert gas matrixes
2003
Combined Raman scattering and ab initio investigation of the interaction between pyrene and carbon SWNT
2003
Quantum-chemical calculations of model systems of interest in fullerene-based superconductivity
2003
An excess electron trapped between thymine and adenine. Ab initio study
2003
Nonadiabatic and Born-Oppenheimer calculations of the polarizabilites of LiH and LiD
2003
Erratum: Structure of hexa-sulfobutyl fullerenes A computational study Fullerenes, Nanotubes, and Carbon Nanostructures 2002) 10:4 363-372)
2003
Computations of model narrow nanotubes closed by fragments of smaller fullerenes and quasi-fullerenes
2003
Matrix-isolation FT-IR studies and theoretical calculations of the vibrational properties of 4-methyl-2′-hydroxy-4′-ethyloxyazobenzene
2003
Correlations between experimental matrix-isolation FT-IR and DFT(B3LYP) calculated data for isolated 1:1 H-bonded complexes of water and pyridine or imidazole derivatives
2003
Two isomers of C sub 60 sub F sub 48 sub Computed inter-isomeric equilibrium
2003
Non-Born-Oppenheimer calculations of atoms and molecules
2003
Isomerism of the anion of the indole-water dimer. Ab initio study
2003
Quantum-chemical model evaluations of thermodynamics and kinetics of oxygen atom additions to narrow nanotubes
2003
An excess electron connects uracil to glycine: Ab-initio study
2003
Correlations between experimental and DFT(B3LYP)6-31+G* H-bonding parameters for closed X⋯H-O⋯H-N X N, O or S) H-bonded complexes
2003
Cluster size effects upon stability of adenine-methanolanions. Theoretical study
2002
Non-born-oppenheimer isotope effects on the polarizabilities of H sub 2 sub
2002
Solvated electrons in very small clusters of polar molecules: HF) sub 3 sub su- su
2002
Tautomery and H-bonding characteristics of 2-aminopurine: A combined experimental and theoretical study
2002
Normal mode analysis of the vibrational spectrum of tropolone A molecule with seven-membered ring
2002
Structure of hexa-sulfobutyl fullerenes: A computational study
2002
Interaction of the uracil dipole-bound electron with noble gas atoms
2002
Anion-aromatic molecule complex. Ab initio study of the benzene·O sub 2 sub anion
2002
An excess electron suspended between two polar molecules. Ab initio study of uracil · H sub 2 sub O and uracil · HF anions
2002
Mass spectrometric and ab initio study of the interaction between 9-methylguanine and amino acid amide group
2002
Nonadiabatic calculations of the dipole moments of LiH and LiD
2002
Non-Born-Oppenheimer calculations of the polarizability of LiH in a basis of explicitly correlated Gaussian functions
2002
Modeling of recognition sites of nucleic acid bases and amide side chains of amino acids. Combination of experimental and theoretical approaches
2002
Alternative multi-reference state-specific coupled cluster wave functions
2002
Matrix-isolation FT-IR study and theoretical calculations of the hydrogen-bond interaction of hypoxanthine with H sub 2 sub O
2002
Two uracil molecules connected by an excess electron
2002
Anions of the hydrogen-bonded thymine dimer: Ab initio study
2001
Dipole-bound anion of 1,3-butanediol. Ab initio and Rydberg electron transfer spectroscopy study
2001
Ab initio calculations of electronically excited states of cyano-substituted polyacetylene cations
2001
Computations of hexa-nitrated and hexa-anilinated fullerenes
2001
Anions of the hydrogen-bonded guanine-cytosine dimer Theoretical study
2001
A dynamic model for electron transport in DNA
2001
Matrix-isolation FT-IR study and theoretical calculations of the vibrational, tautomeric and H-bonding properties of hypoxanthine
2001
Simultaneous optimization of molecular geometry and the wave function in a basis of Singer's n-electron explicitly correlated Gaussians
2001
Analytical gradients for Singer's multicenter n-electron explicitly correlated Gaussians
2001
Dipole-bound anions of adenine-water clusters. ab initio study
2001
Infrared spectra of syn and anti isomers of benzaldoxime and pyridine-4-aldoxime: An experimental matrix isolation and theoretical density functional theory study
2001
Combined FTIR matrix isolation and Ab initio studies of pyruvic acid: Proof for existence of the second conformer
2001
IR spectral and theoretical characterization of intramolecular hydrogen bonds closing five-membered rings
2001
Conformers of nonionized proline. matrix-isolation infrared and post-hartree fock ab initio study
2001
Computing the relative gas-phase populations of C sub 60 sub and C sub 70 sub Beyond the traditional ΔH sub f,298 sub suo su scale
2001
Non-Born-Oppenheimer calculations on the LiH molecule with explicitly correlated Gaussian functions
2001
Combined mass spectrometric and Ab initio study of the point contacts between 9-methyladenine and the amide group
2000
High accuracy non-Born-Oppenheimer calculations for the isotopomers of the hydrogen molecule with explicitly correlated Gaussian functions
2000
Structures and electron affinities of indole-water) sub N sub clusters
2000
Theoretical calculations and matrix-isolation FT-IR studies of hydrogen-bonded complexes of molecules modeling cytosine or isocytosine tautomers. 7. 2-Hydroxypyridine/2-oxopyridine complexes with H sub 2 sub O
2000
Metal-coated fullerenes C sub 60 sub M sub n sub calculations for M Be, Mg, Al and n 12, 20, 32
2000
CASCCD: coupled-cluster method with double excitations and the CAS reference
2000
Cyclic and linear structures of C sub 13 sub a computational study
2000
Computations of metal-covered C sub 60 sub and C sub 70 sub
2000
Isomerism of the covalent anion of the dimer of uracil and 1-methyl-cytosine: Ab initio study
2000
Density Functional Theory Study of the Hydrogen-Bonded Pyridine H sub 2 sub O Complex: A Comparison with RHF and MP2 Methods and with Experimental Data
2000
New approach to the state-specific multireference coupled-cluster formalism
2000
Cytosine anions: Ab initio study
2000
New scheme for solving the amplitude equations in the state-specific coupled cluster theory with complete active space reference for ground and excited states
2000
Theoretical Characterization of Intramolecular Proton Transfer in the Ground and the Lowest-Lying Triplet Excited States of 1-Amino-3-Propenal: A Methodological Comparison
2000
Covalent anion of the canonical adenine Thymine base pair. Ab initio study
2000
Hybrid density functionals and ab initio studies of 2-pyridone-H sub 2 sub O and 2-pyridone-H sub 2 sub O) sub 2 sub
2000
Theoretical investigation of the interaction between 2-pyridone/2-hydroxypyridine and ammonia
2000
DFT/B3-LYP study of the hydrogen-bonding cooperativity: Application to 2-pyridone) sub 2 sub 2-pyridone- H sub 2 sub O 2-pyridone- CH sub 3 sub OH and 2-pyridone- CH sub 3 sub OCH sub 3 sub
2000
Structure and energy of nucleic acid base-amino acid complexes: 1. 1- methyl-uracil-acrylamide
1999
Structures and interaction energies of nucleic acid base-amino acid complexes. Methylcytosines-acrylamide model
1999
Experimental and ab initio theoretical studies of electron binding to formamide, N-methylformamide, and N,N-dimethylformamide
1999
Beyond the born-oppenheimer approximation
1999
P-quinone dimers: H-bonding vs stacked interaction. Matrix-isolation infrared and ab initio study
1999
Ab initio theoretical study of dipole-bound anions of molecular complexes: Formaldehyde dimer anion
1999
Improved nonadiabatic ground-state energy upper bound for dihydrogen
1999
Raman and IR spectroscopy investigations of double tungstates
1999
Theoretical density functional and ab initio computational study of different types of hydrogen-bonding
1999
Density functional theory and ab-initio computational study of the 2- hydroxypyridine/2-pyridone system: A comparison with FT-IR data from matrix isolation experiments
1999
Anions of the Hydrogen-Bonded Uracil Dimer. Ab Initio Theoretical Study
1999
Computational and matrix-isolation FT-IR study of the tautomeric and vibrational properties of methylated guanines
1999
Experimental and theoretical ab initio study of the influence of N-methylation on the dipole-bound electron affinities of thymine and uracil
1999
Passing dynamic objects by reference in Fortran 90: Application to time-dependent quantum chemistry
1999
Correlations between ab initio and experimental data for isolated 1:1 hydrogen-bonded complexes of pyridine and imidazole derivatives with water
1999
A CASSCF-CASPT2 study of the excited-state intramolecular proton transfer reaction in 1-amino-3-propenal using different active spaces
1999
A correlated basis set for nonadiabatic energy calculations on diatomic molecules
1999
Matrix-isolation FT-IR studies and theoretical calculations of different types of hydrogen-bonding: 2-hydroxypyridine/2-oxopyridine complexed with HCl
1999
Isomerism of the Covalent Anion of the Uracil-Thymine Dimer. Ab Initio Study
1999
Ab initio theoretical study of dipole-bound anions of molecular complexes HF)n) su- su, n 5-9
1999
Vibrational spectroscopy of glutethimide From isolated molecule to solid state
1999
Theoretical density functional and ab initio computational study of the tautomeric, vibrational and H-bond properties of 1,7-di-CH sub 3 sub guanine: A comparison with FT-IR data from matrix isolation experiments
1998
Ab initio theoretical study of dipole-bound anions of molecular complexes. H sub 2 sub O ⋯ HCN] su- su and HCN ⋯ H sub 2 sub O] su- su anions
1998
The state-selective coupled cluster method for quasi-degenerate electronic states
1998
Theoretical study of the O-H stretching band in 3-hydroxy-2-methyl-4-pyrone
1998
Theoretical ab initio study of O-H vibrational band in gas-phase glycine conformers
1998
Ab initio theoretical study of dipole-bound anions of molecular complexes. Water molecule inhibits or enhances electron affinity of N-methylaminoadenine
1998
Matrix-isolation infrared and theoretical studies of the glycine conformers
1998
Vibrational spectroscopy of hydroxy-heterobiaryls I. Low frequency modes
1998
Matrix-isolation FT-IR studies and theoretical calculations of hydrogen-bonded complexes of molecules modeling adenine tautomers. 1. H-bonding of benzimidazoles with H sub 2 sub O in ar matrices
1998
Conformational behavior of α-alanine. Matrix-isolation infrared and theoretical DFT and ab initio study
1998
GIAO-CHF and experimental study of the substituent effects on su13 suC magnetic shielding in benzene derivatives
1998
Out-of-plane vibrations of NH sub 2 sub in 2-aminopyrimidine and formamide
1998
An ab initio study of the isomerization of Mg- and Ca-pyrophosphates
1998
Ab initio theoretical study of dipole-bound anions of molecular complexes. Anions of H-bonded hydrogen cyanide polymers
1998
Matrix-isolation FT-IR studies and ab initio calculations of hydrogen-bonded complexes of molecules modeling cytosine or isocytosine tautomers. 6. Experimental observation of a water-induced tautomeric shift for 2-hydroxypyrimidine and 5-bromo-2-hydroxypyrimidine
1998
Molecular structure and infrared spectra of 2-hydroxy-1,4-naphthoquinone; Experimental matrix isolation and theoretical Hartree-Fock and post Hartree-Fock study
1998
Crystal structures of 5-fluoro-dUrd and its 2 and/or 4-thio analogues: Models of substituted dUMP pyrimidine ring interacting with thymidylate synthase
1998
Neutral and negatively-charged formamide, N-methylformamide and dimethylformamide clusters
1998
Ab initio theoretical study of dipole-bound anions of molecular complexes: Water tetramer anions
1998
Modeling of reaction steps relevant to deoxyuridylate dUMP) enzymatic methylation and thymidylate synthase mechanism-based inhibition
1998
C sub 80 sub C sub 86 sub C sub 88 sub Semiempirical and ab initio SCF calculations
1997
Vibrational spectroscopy of hydroxy-heterobiaryls. Low frequency modes of 2-2-hydroxyphenyl)3-pyridynol
1997
Matrix-isolation FTIR studies and theoretical calculations of hydrogen-bonded complexes of imidazole. A comparison between experimental results and different calculation methods
1997
Matrix-isolation FT-IR studies and ab initio calculations of hydrogen-bonded complexes of molecules modeling cytosine or isocytosine tautomers. 4. H-bonded complexes of 1-methyl-2-pyrimidone and N,N-1-trimethylcytosine with water
1997
Dipole-bound anion of hydrogen fluoride dimer: Theoretical ab initio study
1997
Electron affinity of hydrogen, deuterium, and tritium: A nonadiabatic variational calculation using explicitly correlated Gaussian basis functions
1997
Methylation reduces electron affinity of Uracil. Ab initio theoretical study
1997
Combined matrix-isolation FT-IR and ab-initio 6-31+G* studies on tautomeric properties of nucleic acid bases and simpler model molecules
1997
Molecular structure and infrared spectra of 3,4-dihydroxy-3-cyclobutene-1,2-dione; experimental matrix isolation and theoretical Hartree-Fock and post Hartree-Fock study
1997
Competition between H-bonded and stacked dimers of pyrimidine: IR and theoretical ab-initio study
1997
Ab initio theoretical study of dipole-bound anions of molecular complexes: HF) sub 3 sub su- su and HF) sub 4 sub su- su anions
1997
Search for stable anions of uracil-water clusters. Ab initio theoretical studies
1997
A new N-body potential and basis set for adiabatic and non-adiabatic variational energy calculations
1997
An analytical solution of isotopomeric enumerations for C(2v) cyclic odd-numbered carbon clusters C(n)
1997
Ab initio theoretical study of dipole-bound anions of molecular complexes. Water trimer anion
1997
Correlations between ab initio and experimental data for isolated H-bonded complexes of water with nitrogen bases
1997
H-bonded and stacked dimers of pyrimidine and p-benzoquinone. A combined matrix isolation infrared and theoretical ab initio study
1997
Analytic first derivatives for explicitly correlated, multicenter, Gaussian geminals
1997
Dipole-bound anions of ethylene glycol dimers. Theoretical ab initio study
1996
Muitireference self-consistent size-extensive state-selective configuration interaction
1996
Matrix-isolation FT-IR and ab initio 6-31 G* study of 1-CH sub 3 sub adenine tautomerism
1996
Infrared spectra of 6-azathiouracils: An experimental matrix isolation and theoretical ab initio SCF/6-311G study
1996
Matrix-isolation FT-IR studies and ab initio calculations of hydrogen-bonded complexes of molecules modeling cytosine or isocytosine tautomers. 5. 1-CH sub 3 sub cytosine complexes with H sub 2 sub O in Ar matrices
1996
A general bridge between configuration interaction and coupled-cluster methods: A multistate solution
1996
Double-proton-transfer in 2,2′-bipyridine]3,3′-diol: An ab initio study
1996
Multiple site proton affinities of methylated nucleic acid bases
1996
Photophysics of 2-hydroxypyridine: An ab Initio study
1996
Lifetime of positronium molecule. study with boys' explicitly correlated gaussians
1996
An ab initio study of the potential energy surface in the S su1 su state of 2-hydroxypyridine
1996
Water molecule enhances dipole-bound electron affinity of 1-methyl-cytosine
1996
State-selective multireference coupled-cluster theory: In pursuit of property calculation
1996
Dipole-bound electron attachment to uracil-water complexes. Theoretical ab Initio study
1996
Relationshibetween the dipole moments and the electron affinities for some polar organic molecules
1995
Ab initio characterization of electronically excited states in highly unsaturated hydrocarbons
1995
Fullerene neighbours
1995
Use of recursively generated intermediates in state selective multireference coupled-cluster method: A numerical example
1995
Dipole-bound excess-electron states of adenine tautomers. A theoretical ab initio study
1995
Comparison of ab initio HF/6-31G su* su, HF/6-31 G su* su and MP2/6-31G su* su calculated infrared spectra of 4(3H)pyrimidinone and 4-hydroxypyrimidine with matrix isolation spectra
1995
Synthesis, photophysics and theoretical ab initio calculations of a bizwitterionic compound modeling the phototautomer of bipyridyl-diol
1995
Matrix-isolation FT-IR studies and ab-initio calculations of hydrogen-bonded complexes of molecules modeling cytosine or isocytosine tautomers. 2. 4-Aminopyridine and 4-aminopyrimidine complexes with H sub 2 sub O in Ar matrices
1995
Theoretical investigations of the proton transfer reaction in the hydrogen-bonded complex of 2-pyrimidinone with water
1995
Electronic and geometrical structure of dipole-bound anions formed by polar molecules
1995
Breaking bonds with the state-selective multireference coupled-cluster method employing the single-reference formalism
1995
The structure of the CF sub 4 sub su- su anion and the electron affinity of the CF sub 4 sub molecule
1995
The valence and dipole-bound states of the cyanomethide ion, CH sub 2 sub CN su- su
1995
Matrix-isolation FT-IR studies and ab-initio calculations of hydrogen-bonded complexes of molecules modeling cytosine or isocytosine tautomers. 3. Complexes of 4-hydroxypyridine and 3-hydroxypyridine with H sub 2 sub O in Ar matrices
1995
Anharmonic contributions to the inversion vibration in 2-aminopyrimidine
1995
Improved computational strategy for the state-selective coupled-cluster theory with semi-internal triexcited clusters: Potential energy surface of the HF molecule
1995
State-selective multi-reference coupled-cluster theory employing the single-reference formalism: Application to an excited state of H sub 8 sub
1995
Theoretical investigations of the excited-state intramolecular proton transfer reaction in N-substituted-3-hydroxypyridinones
1995
Tautomerism, phototautomerism and infrared spectra of matrix-isolated 2-quinolinethione
1995
A theoretical study on the structure of acetonitrile CH sub 3 sub CN) and its anion CH sub 3 sub CN su- su
1995
Smaller carbon clusters: linear, cyclic, polyhedral
1995
State-selective multireference coupled-cluster theory employing the single-reference formalism: Implementation and application to the H sub 8 sub model system
1994
Inversion of the C sub 8 sub non-planar ring
1994
Infrared spectra and tautomerism of isocytosine; an ab initio and matrix isolation study
1994
AM1 computed relative equilibrium populations of the 5 6) and 5 6) methanobuckminsterfullerenes C sub 61 sub H sub 2 sub
1994
Complexes of 4-aminopyrimidine and 4-hydroxypyrimidine with water: computed relative thermodynamic stabilities
1994
Combined matrix-isolation FT-IR and ab initio 6-31+G* study of H-bonded complexes between water and molecules modelling cytosine or isocytosine
1994
Can electron attachment alter tautomeric equilibrium of guanine? Theoretical ab initio study
1994
State-selective multi-reference coupled-cluster theory using multi-configuration self-consistent-field orbitals. A model study on H sub 8 sub
1994
Matrix isolation FT-IR studies and ab initio calculations of hydrogen-bonded complexes of molecules modeling cytosine or isocytosine tautomers. 1. Pyridine and pyrimidine complexes with H sub 2 sub O in Ar matrices
1994
Theoretical ab initio calculations of the electron affinity of thymine
1994
Proton-transferring systems studied by vibrational spectroscopy and theoretical ab initio calculations. The S sub 0 sub and T sub 1 sub states of 2,2′-bipyridine]3,3′-diol
1994
The role of hydration in the hydrolysis of pyrophosphate. A Monte Carlo simulation with polarizable-type interaction potentials
1994
C sub 61 sub H sub 2 sub fulleroid: AM1 computational study
1994
Ab initio calculations of IR spectra in identification of products of matrix isolation photochemistry: Dewar form of 4( 3H)pyrimidinone
1994
AM1 Computations of C sub 60 sub O sub 2 sub
1994
The electronic and geometrical structure of aluminum fluoride anions AlF sub n sub su- su, n=1-4, and electron affinity of their neutral parents
1994
Solving the single-reference coupled-cluster equations involving highly excited clusters in quasidegenerate situations
1994
Equivalent quantum approach to nuclei and electrons in molecules
1993
The effects of temperature on the relative stabilities of five complexes of 4-hydroxypyridine and water
1993
A computational study of the ozone dimer
1993
Why computed entropies of quasi-linear species are sometimes random?
1993
Classification of 486 isomerizations among 72 su12 suC/ su13 suC isotopomers of cyclic C sub 7 sub
1993
A state-selective multireference coupled-cluster theory employing the single-reference formalism
1993
Structure and conformation of N su4 su-hydroxycytosine and N su4 su-hydroxy-5-fluorocytosine. A theoretical ab initio study
1993
MNDO study of charged complexes of dodecahedron-shaped C sub 20 sub with Li
1993
Complexes of 2-aminopyrimidine, 2-hydroxypyrimidine and their tautomers with water. Relative thermodynamic stabilities
1993
Electron attachment to uracil. Theoretical ab initio study
1993
A classification of 200 isomerizations among 51 isotopomers of C sub 8 sub D sub 2d sub
1993
Theoretical and matrix-isolation experimental studies on 2-thiocytosine and 5-fluoro-2-thiocytosine
1993
Microwave measurements and ab initio dynamics of the large amplitude ring puckering motion in 2-sulpholene
1993
Nonadiabatic variational calculations for the ground state of the positronium molecule
1993
Multireference coupled cluster method for electronic structure of molecules
1993
Mechanism of thymidylate synthase inhibition by N su4 su-hydroxy-N su4 su-hydroxy- 5-fluoro)dCMP in view of the structure and conformation of N su4 su-hydroxy- N su4 su-hydroxy-5-fluoro)cytosine calculated by the AB initio quantum mechanical methods
1993
Infrared spectra of 2-thiocytosine and 5-fluoro-2-thiocytosine; experimental and ab initio studies
1993
Two maxima dependencies of isomerism contribution to heat capacity of N sub 2 sub O-HCN CO-C sub 2 sub H sub 2 sub systems in low temperature region
1993
N sub 2 sub O-HCN and CO-C sub 2 sub H sub 2 sub two associating systems with remarkable low-temperature relative-stability interchanges
1992
Theoretical interpretation of the gas phase equilibrium of 2-hydroxypyridine/2(1H)pyridinone
1992
Matrix isolation IR spectroscopy of tautomeric systems and its theoretical interpretation. 2-Hydroxypyridine/2(1H pyridinone
1992
Converging the single-reference coupled-cluster equations
1992
Stable and metastable states of the Si su- su sub 5 sub anion. Theoretical study
1992
On the relative stabilities of dodecahedron-shaped and bowl-shaped structures of C sub 20 sub
1992
Dimerization in the pyridone/hydroxypyridine tautomeric systems: relative stabilities of the dimers in the 2-pyridone/2-hydroxypyridine and in the 4-pyridone/4-hydroxypyridine systems
1992
Numerical Hartree-Fock characterization of the metastable u4 state of the Ne2- ion
1992
Fullerene C sub 50 sub isomers: Temperature-induced interchange of relative stabilities
1992

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