Willem Siebrand

Q: What Schools Are Affiliated With Willem Siebrand

Willem Siebrand is affiliated with the following schools: University of Amsterdam, University of Santiago de Compostela, Eindhoven University of Technology, Delft University of Technology

Willem Siebrand's AcademicInfluence.com Rankings

Willem Siebrand

Chemistry

#3063

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#4049

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Chemistry

Willem Siebrand's Degrees

PhD Chemistry University of Amsterdam
Masters Chemistry University of Amsterdam
Bachelors Chemistry University of Amsterdam

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Willem Siebrand's Published Works

Number of citations in a given year to any of this author's works

Total number of citations to an author for the works they published in a given year. This highlights publication of the most important work(s) by the author

Published Works

Radiationless Transitions in Polyatomic Molecules. I. Calculation of Franck—Condon Factors (1967) (356)
Radiationless Transitions in Polyatomic Molecules. II. Triplet‐Ground‐State Transitions in Aromatic Hydrocarbons (1967) (343)
Laser Generation of Excitons and Fluorescence in Anthracene Crystals (1965) (341)
Spin–Orbit Coupling in Aromatic Hydrocarbons. Analysis of Nonradiative Transitions between Singlet and Triplet States in Benzene and Naphthalene (1971) (212)
Model for the direct photo-isomerization of stilbene (1975) (206)
Radiationless Transitions in Polyatomic Molecules. III. Anharmonicity, Isotope Effects, and Singlet‐to‐Ground‐State Transitions in Aromatic Hydrocarbons (1968) (172)
Anharmonicity in Polyatomic Molecules. The CH‐Stretching Overtone Spectrum of Benzene (1968) (170)
Theory of vibronic intensity borrowing. Comparison of Herzberg‐Teller and Born‐Oppenheimer coupling (1973) (149)
Theory of Intersystem Crossing in Aromatic Hydrocarbons (1972) (136)
Mechanism of Radiationless Triplet Decay in Aromatic Hydrocarbons and the Magnitude of the Franck—Condon Factors (1966) (134)
Nuclear Spin—Spin Coupling Involving Heavy Nuclei. The Coupling between Hg199 and H1 Nuclei in CH3HgX and CH3CH2HgX Compounds (1963) (115)
Franck–Condon effects in resonance Raman spectra and excitation profiles (1979) (109)
Proton tunnelling in polyatomic molecules: A direct-dynamics instanton approach (1999) (86)
Charge-transfer excitons in anthracene crystals and their role in optical charge carrier generation (1980) (83)
A direct-dynamics study of the zwitterion-to-neutral interconversion of glycine in aqueous solution (2000) (80)
An instanton approach to intramolecular hydrogen exchange: Tunneling splittings in malonaldehyde and the hydrogenoxalate anion (1995) (79)
Golden-rule treatment of hydrogen-transfer reactions. 1. Principles (1984) (78)
Theory of Charge Carrier Transport in Aromatic Hydrocarbon Crystals (1970) (78)
Mode‐specific hydrogen tunneling in tropolone: An instanton approach (1996) (77)
Transport of Quasilocalized Excitons in Molecular Crystals (1970) (76)
Dispersive kinetics: a structural approach to nonexponential processes in disordered media (1986) (76)
Charge-transfer excitons in anthracene crystals. A theoretical investigation of their optical absorption and thermal dissociation☆ (1981) (73)
Theory of resonance Raman scattering. An improved formulation of the vibronic expansion method (1975) (70)
Kinetic isotope effects for concerted multiple proton transfer: a direct dynamics study of an active-site model of carbonic anhydrase II. (2003) (69)
Tunneling dynamics of double proton transfer in formic acid and benzoic acid dimers. (2005) (67)
Isotope Rule for Radiationless Transitions with an Application to Triplet Decay in Aromatic Hydrocarbons (1967) (67)
A direct-dynamics study of proton transfer through water bridges in guanine and 7-azaindole (2000) (67)
Calculation and spectroscopic assignment of charge-transfer states in solid anthracene, tetracene and pentacene (1985) (64)
Exactly solvable models for vibronic coupling in molecular spectroscopy. II. Totally symmetric harmonic mode (1976) (63)
Mechanisms of vibronic intensity borrowing (1972) (58)
Exactly solvable models for vibronic coupling in molecular spectroscopy. III. The pseudo Jahn–Teller effect (1978) (57)
Effect of line broadening mechanisms on resonance Raman excitation profiles: A possible method for measuring short lifetimes (1976) (56)
Mechanisms of intersystem crossing in aromatic hydrocarbons (1970) (54)
Polaron Band Structure and Carrier Mobility in Crystals of Diatomic Molecules and Aromatic Hydrocarbons (1964) (51)
SPIN-ORBIT COUPLING IN AROMATIC HYDROCARBONS. CALCULATION OF THE RADIATIVE TRIPLET LIFETIMES OF NAPHTHALENE ANTHRACENE AND PHENANTHRENE. (1969) (49)
Temperature dependence of kinetic isotope effects for enzymatic carbon-hydrogen bond cleavage (2004) (49)
Golden rule treatment of hydrogen-transfer reactions. II: Applications (1984) (48)
Dynamics of tautomerism in porphine: An instanton approach (1998) (45)
Trapping of Triplet Excitons and the Temperature Dependence of Delayed Fluorescence in Anthracene Crystals (1965) (43)
Analysis and deconvolution of some J’≠0 rovibronic transitions in the high resolution S1←S0 fluorescence excitation spectrum of pyrazine (1989) (43)
Calculation of Franck–Condon Factors for Radiationless Transitions Based on Selective Excitation of Single Vibronic Levels (1971) (43)
Anharmonicity in polyatomic molecules: The problem of phase coincidence and applications to the CH-stretching overtone spectrum of benzene (1973) (42)
Vibrational progressions in vibronically induced transitions (1976) (40)
Correlated double-proton transfer. I. Theory. (2007) (38)
Radiationless decay of vibronically coupled electronic states. II. Non‐Condon effects of nontotally symmetric accepting modes (1980) (38)
Vibrational Structure of Electronic States of Molecular Aggregates. I. A Variation Approach to Dimeric Systems (1964) (38)
Dynamics of the water-catalyzed phototautomerization of 7-azaindole (2001) (36)
Calculation of the tunneling splitting in the zero-point level and CO-stretch fundamental of the formic acid dimer (2004) (35)
Resonance Raman scattering in molecular dimers (1975) (35)
Dynamics of molecular inversion: An instanton approach (1995) (34)
Excitation profiles for totally symmetric modes in resonance Raman scattering (1975) (34)
Effect of solvent-induced line broadening on resonance Raman excitation profiles and depolarization ratios (1982) (34)
Mode-specific tunneling splittings in 9-hydroxyphenalenone: Comparison of two methods for direct tunneling dynamics (1998) (34)
Assignment and vibrational analysis of the 600 nm absorption band in the phenoxyl radical and some of its derivatives (1993) (33)
The structure of phenol-ammonia clusters before and after proton transfer. A theoretical investigation (1997) (32)
Exact solution of a vibronic coupling model and its implications for the herzberg—teller expansion method (1975) (31)
A quantum‐dynamics study of the prototropic tautomerism of guanine and its contribution to spontaneous point mutations in Escherichia coli (2001) (31)
The dushinsky effect in resonance Raman spectroscopy (1979) (30)
Triplet excitons as probes for structural imperfections in crystalline anthracene (1974) (30)
Vibronic Coupling Criteria in Molecular Crystals (1964) (29)
Comparison of synchronous and asynchronous hydrogen transfer mechanisms in free-base porphyrins☆ (1989) (29)
Toluene internal-rotation: Measurement and simulation of the high-resolution S1–S0 fluorescence excitation spectrum at 0.5 K (2000) (29)
Nonradiative Processes in Molecular Systems (1976) (29)
Structural interpretation of non-exponential hydrogen transfer in glassy methanol☆ (1985) (28)
N6.bul.-. Spectroscopic and Theoretical Studies of an Unusual Pseudohalogen Radical Anion (1995) (28)
Vibronic coupling and line broadening in polyatomic molecules (1971) (28)
DOIT: a program to calculate thermal rate constants and mode‐specific tunneling splittings directly from quantum‐chemical calculations (2001) (28)
Intramolecular tunneling exchange of the inner hydrogen atoms in free-base porphyrins (1988) (27)
Resonance Raman Spectroscopy—A Key to Vibronic Coupling (1979) (27)
Radiationless decay of vibronically coupled electronic states (1978) (27)
Vibrational structure of resonance raman spectra (1973) (26)
The rainbow instanton method: a new approach to tunneling splitting in polyatomics. (2012) (26)
Electronic propensity rule for radiationless transitions (1981) (25)
Direct-Dynamics Approaches to Proton Tunneling Rate Constants. A Comparative Test for Molecular Inversions and an Application to 7-Azaindole Tautomerization (1999) (25)
Mechanistic Analysis of Double Hydrogen Dyotropy in syn-Sesquinorbornene Disulfones. A Combined Kinetic and Theoretical Evaluation of Primary Deuterium Isotope Effects (1994) (25)
Franck—Condon Factors for Radiationless Transitions (1971) (25)
Analysis of vibronic intensities in the phosphorescence spectrum of dimethylbenzaldehydes in durene (1984) (24)
Non-condon effects in the X→A electronic absorption band system of sulphur dioxide (1979) (24)
Theoretical evaluation of the frequency and intensity of low-energy charge-transfer transitions in aromatic hydrocarbon crystals. I. Anthracene☆ (1987) (24)
Radiationless decay of vibronically coupled electronic states. III. Strong coupling and its effect on triplet decay in aromatic hydrocarbons (1981) (23)
Evaluation of reaction rate constants in media where they show dispersion: Hydrogen abstraction by methyl radicals in a methanol glass (1984) (23)
Vibronic intensity borrowing. Deuterium effect and emission—absorption asymmetry of the S1S0 transition in pyrene☆ (1973) (21)
Calculation of the isotope effect on the triplet lifetime of partially deuterated naphtalenes (1969) (21)
Matrix elements for internal conversion (1978) (21)
Quantitative interpretation of the absorption and emission spectra of 1,8‐diphenyl‐1,3,5,7‐octatetraene (1983) (20)
Analysis of Raman excitation profiles for cis‐(CH)x and‐(CD)x polymers (1984) (20)
Structural interpretation of hole burning in inhomogeneously broadened absorption bands (1985) (20)
Spectroscopic effects of vibronic coupling between nearby 3nπ* and 3ππ* states of dimethylbenzaldehydes in a durene matrix (1979) (20)
Theory of resonance Raman scattering beyond the Condon approximation for a system with two modes of different symmetry (1981) (19)
Proton transfer dynamics via high resolution spectroscopy in the gas phase and instanton calculations. (2004) (19)
Temperature and site dependence of the rate of hydrogen and deuterium abstraction by methyl radicals in methanol glasses (1984) (19)
Theory of electron spin alignment through nonradiative processes in naphthalene and anthracene (1970) (19)
New assignment of the vibrational structure of the V ← N transition in ethylene-d4 (1990) (19)
Mechanisms of Double Proton Transfer. Theory and Applications (2008) (19)
Matrix elements for intersystem crossing (1975) (18)
GOLDEN‐RULE TREATMENT OF HYDROGEN‐TRANSFER REACTIONS. 2. APPLICATIONS (1984) (18)
Vibrational structure of multiplicity-forbidden spectra. Non-condon effects and vibronic interference in hetero-aromatics☆ (1980) (18)
Proton transfer and solvent reorganization in organic clusters. A theoretical study (1997) (18)
Determination of the Lifetime of the Second Excited Triplet State of Anthracenes (1991) (18)
Methanol dimer formation drastically enhances hydrogen abstraction from methanol by OH at low temperature. (2016) (17)
A new perturbation approach to coupling between adiabatic states (1974) (17)
ELECTRONIC SPECTROSCOPY OF TRANS-STYRYLPYRIDINES AND THEIR CONJUGATE ACIDS (1979) (17)
Spin-orbit coupling in aromatic hydrocarbons. The radiative triplet lifetime of naphthalene (1969) (17)
Reinterpretation of charge-transfer bands observed in the electroabsorption spectra of solid aromatic hydrocarbons (1988) (16)
Franck-condon factors for the predissociation of benzene☆ (1972) (16)
Totally symmetric progressions in resonance Raman spectra and excitation profiles (1981) (16)
Theoretical analysis of the vibrational structure of the T <-- N transition in ethylene (1989) (15)
Theory of electron-phonon interactions in organic crystals. Effect on charge carrier transport (1971) (15)
The analysis of unresolved Raman excitation profiles. 1—Totally symmetric vibrations with applications to ruthenium red and zirconium trisulfide (1982) (15)
Observation and modeling of the recombination kinetics of diphenylmethyl radicals in the cavities of Na-X zeolite (1991) (15)
Hydrogen abstraction by triplet ketones: Applicability of the electronic-vibrational energy transfer model (1972) (15)
Sign of the Hall effect for hopping transport in molecular crystals (1970) (14)
Phono-limited transport of charge carriers in molecular crystals (1969) (14)
Inversion of the oxiranyl radical occurs by quantum-mechanical tunneling (1988) (14)
Hydrogen abstraction by methyl radicals in glasses (1984) (14)
Electron spin resonance (ESR) investigation of the structure of methyl radical trapping sites in methanol glass (1987) (14)
Non-condon effects on radiationless triplet decay in benzene and naphthalene (1980) (14)
Communication: Selection rules for tunneling splitting of vibrationally excited levels. (2013) (14)
Multimode approach to hydrogen tunneling (1993) (14)
Entanglement and co-tunneling of two equivalent protons in hydrogen bond pairs. (2018) (14)
Local-mode analyis of radiationless triplet decay in condensed aromatic hydrocarbons☆ (1988) (14)
Generalized Swain–Schaad relations including tunneling and temperature dependence (2005) (14)
New interpretation of ground- and excited-state tunneling splitting in 2-pyridone . 2-hydroxypyridine (2004) (13)
Non-Arrhenius behaviour of transitions across energy barriers due to crossing of potential energy surfaces (1978) (13)
On the perturbation description of radiationless transitions (1972) (13)
Resonance raman scattering in molecules with vibronically coupled excited states (1976) (12)
Tunneling splitting in double-proton transfer: direct diagonalization results for porphycene. (2014) (12)
Evidence for an Isotope Effect on Electron Drift Mobilities in Anthracene Crystals (1970) (11)
On the relation between radiative and nonradiative transitions in molecules (1971) (11)
Resonance Raman scattering in molecules with double minimum potentials (1977) (11)
Vibronic and multimode effects on the raman excitation profile of a totally symmetric fundamental in the soret band of cytochrome c (1983) (11)
Interaction between vibronic coupling and spin—orbit coupling in pyrazine (1979) (11)
Delayed Fluorescence Quenching by Charge Carriers in Anthracene Crystals. A Quartet State Model (1973) (11)
Zero-point tunneling splittings in compounds with multiple hydrogen bonds calculated by the rainbow instanton method. (2013) (11)
Anharmonic potentials and vibronic energy levels for closely coupled molecular electronic states (1977) (10)
Frequencies of intermolecular vibrations in electronically excited dimers and charge-transfer complexes in solids (1981) (10)
Scaled and unscaled crude-adiabatic born-oppenheimer wavefunctions☆ (1977) (10)
Weak and strong vibronic coupling limits in molecules and their correlation (1976) (10)
Theoretical study of the excited-state proton-transfer threshold in 1-naphthol–ammonia complexes (2000) (10)
Multiple Proton Transfer: From Stepwise to Concerted (2007) (9)
Temperature Dependence of Radiationless Transitions (1969) (9)
Optical charge carrier generation by charge-transfer excitation in pentacene crystals (1982) (9)
Single vibronic level fluorescence spectra of pyrazine and their relation to vibronic coupling (1979) (9)
Rotor-vibrator couplings in partially deuterated toluenes (1997) (9)
Time dependence of optical charge carrier generation in anthracene crystals (1982) (8)
Tunneling splitting and level ordering in a CO-stretch fundamental of the formic acid dimer (2008) (8)
Theory of the Hall Effect in Aromatic Hydrocarbon Crystals (1970) (8)
Inversion of the dioxolanyl radical: an experimental and theoretical study (1990) (8)
Vibrational Structure of Electronic States of Molecular Aggregates. II. Extended Weak‐Coupling Theory of One‐Dimensional Lattices (1964) (8)
Generalization of Raman intensity expressions so as to include resonance (1974) (8)
Theoretical study of the structure of phenol–ammonia complexes subject to proton transfer (2001) (8)
Theory of odd torsional transitions in the V−N resonance Raman spectrum of ethylene (1996) (6)
Theoretical investigation of asymmetric methyl rotor dynamics in partially deuterated acetophenones (1992) (6)
Theoretical study of a model for RNA solvolysis catalyzed by large ribozymes (2002) (6)
Theoretical investigation of the inversion of the methylcyclopropyl radical (1989) (6)
Theory of resonance raman scattering by degenerate modes due to renner-teller interactionin porphyrins☆ (1979) (6)
Non-condon effects on radiative lifetimes of induced electronic transition (1980) (6)
Polarizability of aromatic hydrocarbon ions (1983) (6)
Relaxation in disordered systems (1986) (6)
Kinetic Isotope Effects in Multiple Proton Transfer (2006) (5)
On the Involvement of Triplet Excitons in a Two Photon Generation of Charge Carriers in Anthracene (1980) (5)
Basis-independent matrix elements for radiationless transitions and their application to intersystem crossing☆ (1973) (5)
Nature of an optically prepared state undergoing radiationless decay (1977) (5)
Theoretical analysis of intramolecular double-hydrogen transfer in bridged-ring compounds (1993) (5)
Methyl torsional fine structure in the high‐resolution S0→T(nπ*) excitation spectrum of acetophenone and its three methyl‐deuterated isotopomers (1991) (5)
Theoretical investigation of a possible new stress‐induced anthracene crystal phase with a strong effect on triplet exciton transport (1990) (5)
Recurrence and irreversibility in radiationless transitions (1972) (5)
Intermolecular hydrogen tunneling in solids. Comparison between diabatic and adiabatic rate expressions (1988) (5)
Multidimensional Hamiltonian for tunneling with position-dependent mass. (2014) (5)
Charge-carrier drift mobility analysis for naphthalene (1980) (5)
Time‐ and frequency‐resolved light scattering by isolated molecules. I. Nonperturbative treatment of a single‐doorway model (1986) (4)
Model for the analysis of enzymatic proton-transfer reactions with an application to soybean lipoxygenase-1 and six mutants (2010) (4)
Theoretical analysis of resonance Raman scattering in ethylene (1991) (4)
GOLDEN‐RULE TREATMENT OF HYDROGEN‐TRANSFER REACTIONS. 1. PRINCIPLES (1984) (4)
Theory of resonance Raman scattering by molecules subject to twisting with an application to ethylene (1990) (3)
Observation and analysis of quantum beats in the P(2) rotational band of the S1←S0(0−0) excitation spectrum of pyrazine (1989) (3)
Refined analysis of Raman excitation profiles for cis‐(CH)x and ‐(CD)x polymers (1989) (3)
Normal-coordinate rotation as a cause of missing bands in molecular electronic spectra. The case of magnesium tetrabenzoporphine (1983) (3)
Analysis of kinetic isotope effects in enzymatic carbon-hydrogen cleavage reactions. (2011) (3)
Theoretical evaluation of anharmonic contributions to radiationless transitions in aromatic hydrocarbons (1968) (3)
Recent developments in radiationless transitions (1970) (3)
Competition between hydrogen and deuterium abstraction by methyl radicals in isotopomerically mixed methanol glasses (1993) (3)
Triplet-triplet fluorescence and spin polarization. m-Xylylene type biradicals (1988) (2)
Analysis of the nonexponential triplet-triplet fluorescence decay in methyl-substituted m-xylene biradicals (1991) (2)
Observation and analysis of the cold fluorescence-excitation spectrum of 2,3-dimethyl-2-butene (1990) (2)
Vibronic study of sudden polarization in ethylene derivatives (1982) (2)
MODEL STUDY OF THE ABRUPT EXCESS-ENERGY DEPENDENCE OF RADIATIONLESS DECAY IN BENZENE AND AZABENZENES (1991) (1)
Hydrogen Tunneling in Chemical Reactions. Comparison of the Golden-Rule Approach with Transition-State Theory (1986) (1)
Site-selected fluorescence and fluorescence-excitation spectra of o-durylene-h12 and -d12 in n-hexane at 5–10 K (1984) (1)
Mechanisms of CH-Bond Cleavage Catalyzed by Enzymes (2005) (1)
Analysis of deuterium effects on the rate of multiphonon relaxation in hydrated cesium chloromanganate crystals (CsMnCl3-2H2O, -2D2O) (1983) (1)
Charge Transfer Spectra of Aromatic Hydrocarbon Crystals (1983) (1)
Analysis of the Nonexponential Triplet‐Triplet Fluorescence Decay in Methyl‐Substituted m‐Xylylene Biradicals. (1992) (0)
Methyl Torsional Fine Structure in the High-Resolution S0 T(n. pi.*) Excitation Spectrum of Acetophenone and Its Three Methyl- Deuterated Isotopomers. (1991) (0)
QUANTITATIVE INTERPRETATION OF THE ABSORPTION AND EMISSION SPECTRA OF 1,8-DIPHENYL-1,3,5,7-OCTATETRAENE (1983) (0)
SINGLET-TRIPLET NONRADIATIVE TRANSITIONS IN AROMATIC HYDROCARBONS (1970) (0)
Interpretation of Kinetic Isotope Effects in Enzymatic Cleavage of Carbon-Hydrogen Bonds (2010) (0)
Combining instanton theory and ab initio data to model tunneling dynamics (1996) (0)
ANHARMONICITY IN POLYATOMIC MOLECULES, THE PROBLEM OF PHASE COINCIDENCE AND APPLICATIONS TO THE CH-STRETCHING OVERTONE SPECTRUM OF BENZENE (1973) (0)
New interpretation of proton and deuteron tunneling in 2′-methylacetophenone (2013) (0)
ROTATIONAL FINE STRUCTURE IN THE FLUORESCENCE EXCITATION SPECTRUM OF TOLUENE (1998) (0)
William George Schneider OC FRSC. 1 June 1915 — 18 February 2013 (2015) (0)

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What Schools Are Affiliated With Willem Siebrand?

Willem Siebrand is affiliated with the following schools:

University of Amsterdam
University of Santiago de Compostela
Eindhoven University of Technology
Delft University of Technology