Electron Spin Resonance of Porphyrin π Cations and Anions

Introduction to Magnetic Resonance

1967 • 1,564 citations

Electron spin resonance: A comprehensive treatise on experimental techniques

1983 • 1,033 citations

Studies of the Jahn-Teller effect .II. The dynamical problem

1958 • 917 citations

Theory of ESR Linewidths of Free Radicals

1960 • 889 citations

Electron Paramagnetic Resonance

1973 • 795 citations

Indirect Hyperfine Interactions in the Paramagnetic Resonance Spectra of Aromatic Free Radicals

1956 • 657 citations

�ber die magnetischen Momente der Atomkerne

1930 • 625 citations

Paramagnetic resonance

1963 • 593 citations

Theory of Linewidths in Electron Spin Resonance Spectra

1963 • 592 citations

Theoretical Interpretation of Carbon-13 Hyperfine Interactions in Electron Spin Resonance Spectra

1961 • 555 citations

NMR of Paramagnetic Molecules

1973 • 465 citations

.pi.-Cation radicals and dications of metalloporphyrins

1970 • 450 citations

Electron Spin Resonance of Chlorophyll and the Origin of Signal I in Photosynthesis

1971 • 441 citations

Compounds I of Catalase and Horse Radish Peroxidase: π-Cation Radicals

1971 • 413 citations

Electrochemical and electron paramagnetic resonance studies of metalloporphyrins and their electrochemical oxidation products

1970 • 366 citations

The physical principles of electron paramagnetic resonance

1973 • 313 citations

Biological applications of electron spin resonance

1973 • 302 citations

Crystal and molecular structure and absolute configuration of ethyl chlorophyllide a-dihydrate. Model for the different spectral forms of chlorophyll a

1975 • 283 citations

Gauge invariance of the g tensor

1963 • 274 citations

Primary charge separation in bacterial photosynthesis: oxidized chlorophylls and reduced pheophytin.

1975 • 267 citations

The primary photochemical reaction of bacterial photosynthesis

1975 • 235 citations

gfactors of aromatic free radicals

1963 • 235 citations

Measurement of g Values in the Electron Spin Resonance Spectra of Free Radicals

1965 • 223 citations

ENDOR EXPERIMENTS ON CHLOROPHYLL AND BACTERIOCHLOROPHYLL IN VITRO AND IN THE PHOTOSYNTHETIC UNIT*

1975 • 222 citations

Polarographic Reduction of Porphyrins and Electron Spin Resonance of Porphyrin Anions¹

1966 • 210 citations

Relaxation in Magnetic Resonance

1971 • 197 citations

Quantum Effects of Methyl-Group Rotations in Magnetic Resonance: ESR Splittings and Linewidths

1965 • 196 citations

Hyperfine coupling constants and their dependence on charge densities

1963 • 170 citations

Electron spin resonance

1973 • 156 citations

Characterization of primary reactants in bacterial photosynthesis. II. Kinetic studies of the light-induced EPR signal (g = 2.0026) and the optical absorbance changes at cryogenic temperatures

1974 • 154 citations

Electron nuclear double resonance of bacteriochlorophyll free radical in vitro and in vivo

1973 • 149 citations

Negative Ions of Porphin Metal Complexes

1963 • 147 citations

MODELS FOR ANTENNA AND REACTION CENTER CHLOROPHYLLS*

1975 • 136 citations

Characterization of primary reactants in bacterial photosynthesis. I. Comparison of the light-induced EPR signal (g = 2.0026) with that of a bacteriochlorophyll radical

1972 • 136 citations

Nuclear Hyperfine Interactions in Orbitally Degenerate States of Aromatic Ions

1961 • 131 citations

Theory of the Effects of Exchange on the Nuclear Fine Structure in the Paramagnetic Resonance Spectra of Liquids

1957 • 130 citations

The π-Cation Radical of Chlorophyll a

1970 • 129 citations

Metalloporphyrin redox chemistry. Effect of extraplanar ligands on the site of oxidation in ruthenium porphyrins

1973 • 120 citations

Generalized Cumulant Expansions and Spin-Relaxation Theory

1968 • 120 citations

THE CHEMISTRY OF PORPHYRIN π‐CATIONS*

1973 • 116 citations

AN IDENTIFICATION OF THE RADICAL GIVING RISE TO THE LIGHT‐INDUCED ELECTRON SPIN RESONANCE SIGNAL IN PHOTOSYNTHETIC BACTERIA

1969 • 115 citations

Theory of Saturation and Double-Resonance Effects in ESR Spectra

1965 • 112 citations

14N Hyperfine Structure in ESR Spectra of Heterocyclic Anions

1966 • 111 citations

Theory of saturation and double resonance effects in electron spin resonance spectra. II. Exchange vs. dipolar mechanisms

1967 • 109 citations

Primary Processes in Bacterial Photosynthesis

1973 • 107 citations

An Electron-Nuclear Double Resonance (Endor) Study of the Special Pair Model for Photo-Reactive Chlorophyll in Photosynthesis

1974 • 104 citations

Electron-spin resonance spectra of aromatic radicals and radical-ions

1963 • 103 citations

Chlorophyll and Light Energy Transduction in Photosynthesis1 1Work performed under the auspices of the U.S. Atomic Energy Commission.

1973 • 97 citations

Electrochemical studies of tetraphenylporphin, tetraphenylchlorin, and tetraphenylbacteriochlorin

1971 • 93 citations

Structure of bacteriochlorophyll b

1974 • 90 citations

Crystal and molecular structure of ethyl chlorophyllide b-dihydrate at -153.deg.

1975 • 89 citations

Anion radical of bacteriochlorophyll

1973 • 87 citations

Electrochemical Studies of Zinc Tetraphenylporphin

1972 • 86 citations

ESR STUDIES OF PORPHYRIN π‐CATIONS: THE ²A_1u and ²A_2u STATES*

1973 • 85 citations

Crystal and molecular structure of the radical perchloratotetraphenylporphinatozinc(II)

1974 • 85 citations

Iron(IV) porphyrins

1971 • 81 citations

Perturbation of Singlet-Triplet Transition Energies¹

1965 • 81 citations

Reversible intramolecular electron transfer in an oxidized nickel porphyrin

1975 • 80 citations

The Cation Radicals of Free Base and Zinc Bacteriochlorin, Bacteriochlorophyll, and Bacteriopheophytin

1974 • 78 citations

Spin-Orbit Coupling in Orbitally Degenerate States of Aromatic Ions

1961 • 78 citations

EPR studies on compound I of horseradish peroxidase

1975 • 77 citations

Conformational Changes upon Reduction of Cytochrome c

1972 • 76 citations

Crystal and molecular structure of methyl pheophorbide with applications to the chlorophyll arrangement in photosynthetic lamellae

1972 • 72 citations

Vibronic Interaction of Nearly Degenerate States in Substituted Benzene Anions

1965 • 71 citations

Ionic interactions in solutions of electrolytes as studied by ultra-violet spectroscopy

1960 • 68 citations

Electron spin relaxation in liquids

1973 • 66 citations

Electron paramagnetic resonance: Techniques and applications

1969 • 64 citations

The one-electron oxidation of magnesium octaethylporphin

1968 • 63 citations

OXIDATION OF FERRIC PORPHYRINS*

1973 • 63 citations

Solvation spectra. XVI. Ion-pair formation studied by electron spin resonance

1967 • 55 citations

Relationship between Electron Spin Resonance Hyperfine Splittings and π-Electron Spin Densities. A First-Order Excess Charge Effect

1965 • 53 citations

Structure of tetra-n-propylporphine. Average structure for the free base macrocycle from three independent determinations

1972 • 52 citations

Cations and cation radicals of porphyrins and ethyl chlorophyllide a

1969 • 51 citations

Electron paramagnetic resonance identification of a nickel(III) compound produced by electrochemical oxidation of nickel(II) tetraphenylporphyrin

1970 • 48 citations

Anion radicals of bacteriochlorophyll a and bacteriopheophytin a. Electron spin resonance and electron nuclear double resonance studies

1977 • 47 citations

Electron Spin Resonance Studies of the Diazine Negative Ions

1962 • 46 citations

Proton-electron hyperfine coupling constants of the chlorophyll a cation radical by ENDOR spectroscopy

1977 • 45 citations

Signs of spin densities and vibronic interactions in 1- and 1,4-alkyl-substituted benzene anions

1967 • 44 citations

ESR and ENDOR studies of the .pi. cation radical of bacteriochlorophyll

1976 • 44 citations

Delocalization of Unpaired Electron Density of π Radicals into Substituent Phenyl Groups

1968 • 44 citations

A COMPARISON OF DECAY KINETICS OF PHOTO‐PRODUCED ABSORBANCE, EPR, AND LUMINESCENCE CHANGES IN CHROMATOPHORES OF RHODOSPIRRILLUM RUBRUM*

1967 • 43 citations

Negative Ions of Tetrapyrrole Compounds

1975 • 40 citations

Reaction of xenon difluoride with aromatic compounds. I. Generation and electron spin resonance spectra of radical cations

1970 • 40 citations

Reversible photooxidation of chlorophyll. Study of the chlorophyll-benzoquinone system utilizing flash photolysis and electron spin resonance spectroscopy

1972 • 39 citations

Étude des propriétés d’oxydoréduction de complexes métalliques de divers cycles tétrapyrroliques

1974 • 37 citations

ABSORPTION CHANGES IN THE REACTION CENTER OF PHOTOSYNTHETIC BACTERIA AND n‐ELECTRON CALCULATIONS ON BACTERIOCHLOROPHYLL, ITS MONO CATION AND ANION

1971 • 37 citations

Cation radicals of tetraalkylprophyrins

1974 • 35 citations

Electron Spin Resonance of the Hexamethylbenzene and Hexaethylbenzene Positive-Ion Radicals

1967 • 35 citations

Electron spin resonance of [magnesium-25]chlorophyll a

1973 • 35 citations

Electron spin resonance in 13C-labeled chlorophyll and 13C-labeled algae

1972 • 34 citations

On the Z Independence of Correlation Energy in Heliumlike Ions

1970 • 32 citations

Die reversible Einelektronen-Oxydation von Metallochlorinen und ein Vergleich der Liganden Octaäthylporphin und -chlorin

1970 • 31 citations

Light-induced paramagnetism in photosynthetic systems

1974 • 31 citations

The Inductive Effect in the Toluene Anion Radical

1965 • 31 citations

ESR Relaxation Studies on Orbitally Degenerate Free Radicals. II

1970 • 30 citations

Nitrogen electron nuclear double resonance and proton triple resonance experiments on the bacteriochlorophyll cation in solution.

1978 • 30 citations

Simultaneous quantitative comparison of the optical changes at 700 nm (P700) and electron spin resonance signals in system I of green plant photosynthesis

1973 • 29 citations

Structure of the Krasnovskii Photoreduction Product of Chlorophyll a

1974 • 29 citations

Hyperfine structure in the electron spin resonance spectra of reduced porphins

1967 • 25 citations

Hyperfine interaction of halide ions with metalloporphyrin cation radicals

1971 • 25 citations

シクロデキストリン

1977 • 24 citations

Optical and paramagnetic identification of a primary electron acceptor in bacterial photosynthesis

1978 • 23 citations

Formation of Phase Test Intermediate of Chlorophyll by Electrolytic Reduction

1964 • 19 citations

Electronic and electron spin resonance spectra of the perfluoro-2,1,3-benzoselenadiazole anion radical

1968 • 18 citations

Electron spin resonance of substituted pyridine N-oxide radical anions. Aromatic nitroxides

1969 • 17 citations

CHLOROPHYLL ONE‐ELECTRON PHOTOCHEMISTRY‐I. PHOTOPRODUCTION OF THE CATION RADICALS OF CHLOROPHYLL AND BACTERIOCHLOROPHYLL IN SOLUTIONS AT LOW TEMPERATURES*

1974 • 17 citations

Ground-state energies of mono-, di-, tri- and tetranegative ions of porphins and their metal complexes

1966 • 15 citations

Interactions between Chlorophyll and Water in the Solid State: Electron Spin Resonance

1968 • 14 citations

Electron Spin Resonance of Alkylaromatic Radical Cations

1972 • 12 citations

Stable free radicals. IX. Use of halogen nuclear quadrupole coupling in electron spin resonance spectra of imino nitroxides for determination of solvent effects on rotational correlation times

1970 • 11 citations

Substituent effects on the ring proton splitting in the electron spin resonance spectra of some tetrasubstituted benzenes

1975 • 11 citations

Quantum yield and image contrast of bacteriochlorophyll monolayers in photoelectron microscopy

1978 • 11 citations

g-factor deviations in degenerate aromatic hydrocarbon radicals: the benzene anion

1971 • 10 citations

Electron paramagnetic resonance studies of ion pairs in solutions of cation radicals

1974 • 8 citations

An experimental estimate of the lower bound on the energy separation between the ground and first excited electronic states of the p-xylene anion radical

1978 • 7 citations

ESR Studies on ²⁰⁵Tl Hyperfine Couplings in the Radical Cations of Tl(III)Porphyrins

1974 • 5 citations

[Spectral study of ion-radical forms of Mg-etioporphyrin].

1974 • 3 citations

[Photochemical generation of the cation-radical of bacteriochlorophyll b and the anion-radical of bacteriochlorophyll b and bacteriopheophytin b, components of the photosynthesizing bacteria Rhodopseudomonas viridis].

1975 • 3 citations