The Experts below are selected from a list of 99 Experts worldwide ranked by ideXlab platform
Tsunehiro Tanaka - One of the best experts on this subject based on the ideXlab platform.
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vibronically induced activation mechanism in photocatalysis of highly dispersed vanadium oxide supported on silica v2o5 sio2 evidence in Phosphorescence spectra
Chemical Physics Letters, 2013Co-Authors: Naoya Iwahara, Tohru Sato, Kazuyoshi Tanaka, Tsunehiro TanakaAbstract:Abstract Vibronic progressions in the Phosphorescence Spectrum of highly dispersed vanadium oxide on silica support, V 2 O 5 /SiO 2 , measured by Hazenkamp and Blasse [18] is simulated. The irregular peak spacing is revealed to be evidence of the existence of a few active vibrational modes coupled with the electronic excited T 1 state, which is assigned to the active state as a photocatalyst. Among the active modes, the Jahn–Teller mode is responsible for the photocatalytic reactivity.
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Vibronically induced activation mechanism in photocatalysis of highly dispersed vanadium oxide supported on silica, V2O5/SiO2: Evidence in Phosphorescence spectra
Chemical Physics Letters, 2013Co-Authors: Naoya Iwahara, Tohru Sato, Kazuyoshi Tanaka, Tsunehiro TanakaAbstract:Abstract Vibronic progressions in the Phosphorescence Spectrum of highly dispersed vanadium oxide on silica support, V 2 O 5 /SiO 2 , measured by Hazenkamp and Blasse [18] is simulated. The irregular peak spacing is revealed to be evidence of the existence of a few active vibrational modes coupled with the electronic excited T 1 state, which is assigned to the active state as a photocatalyst. Among the active modes, the Jahn–Teller mode is responsible for the photocatalytic reactivity.
Warren F. Beck - One of the best experts on this subject based on the ideXlab platform.
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Dynamic Stokes Shift of the Time-Resolved Phosphorescence Spectrum of ZnII-Substituted Cytochrome c
The journal of physical chemistry. B, 2013Co-Authors: Lynmarie A. Posey, Ryan J. Hendricks, Warren F. BeckAbstract:The dynamic Phosphorescence Stokes shift (PSS) response of ZnII-substituted cytochrome c (ZnCytc) was detected using the time-resolved Phosphorescence Spectrum of the intrinsic ZnII-porphyrin chromophore, which senses the motions of the surrounding protein and hydration shell. The Phosphorescence Spectrum of ZnCytc exhibits resolved vibronic structure arising from in-plane deformations of the porphyrin macrocycle, as is also observed in the absorption and fluorescence spectra. As the emission time increases, the Phosphorescence Spectrum shifts to the red without incurring a significant change in vibronic structure or line shape, so the shift arises from dynamic solvation, the reorganizational motions of the protein and solvent that occur in response to formation of the first excited triplet state. A correlation time of 294 ± 14 μs was obtained from a single-exponential fit to the time dependence of the mean emission frequency of the T(0,0) peak in the Phosphorescence Spectrum. This time scale is consisten...
Naoya Iwahara - One of the best experts on this subject based on the ideXlab platform.
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vibronically induced activation mechanism in photocatalysis of highly dispersed vanadium oxide supported on silica v2o5 sio2 evidence in Phosphorescence spectra
Chemical Physics Letters, 2013Co-Authors: Naoya Iwahara, Tohru Sato, Kazuyoshi Tanaka, Tsunehiro TanakaAbstract:Abstract Vibronic progressions in the Phosphorescence Spectrum of highly dispersed vanadium oxide on silica support, V 2 O 5 /SiO 2 , measured by Hazenkamp and Blasse [18] is simulated. The irregular peak spacing is revealed to be evidence of the existence of a few active vibrational modes coupled with the electronic excited T 1 state, which is assigned to the active state as a photocatalyst. Among the active modes, the Jahn–Teller mode is responsible for the photocatalytic reactivity.
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Vibronically induced activation mechanism in photocatalysis of highly dispersed vanadium oxide supported on silica, V2O5/SiO2: Evidence in Phosphorescence spectra
Chemical Physics Letters, 2013Co-Authors: Naoya Iwahara, Tohru Sato, Kazuyoshi Tanaka, Tsunehiro TanakaAbstract:Abstract Vibronic progressions in the Phosphorescence Spectrum of highly dispersed vanadium oxide on silica support, V 2 O 5 /SiO 2 , measured by Hazenkamp and Blasse [18] is simulated. The irregular peak spacing is revealed to be evidence of the existence of a few active vibrational modes coupled with the electronic excited T 1 state, which is assigned to the active state as a photocatalyst. Among the active modes, the Jahn–Teller mode is responsible for the photocatalytic reactivity.
Giorgio Orlandi - One of the best experts on this subject based on the ideXlab platform.
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Quantum-Chemical Modeling and Analysis of the Vibrational Structure in the Phosphorescence Spectrum of C60
The Journal of Physical Chemistry A, 2001Co-Authors: Maria Giuffreda, Fabrizia Negri, Giorgio OrlandiAbstract:The Phosphorescence Spectrum of C60, recently obtained in alkane and in Xe matrixes at low temperature, has been modeled by means of semiempirical quantum chemical calculations. The T1 → S0 transition in the unperturbed molecule is symmetry as well as spin multiplicity forbidden. The intensities of the false origins due to inducing modes have been calculated in terms of the Herzberg−Teller mechanism combined with an expansion over spin−orbit perturbations. To date, this is the first modeling of the Phosphorescence Spectrum of C60 entirely based on computed molecular parameters. Thus, the analysis of the Spectrum is based not only on vibrational frequencies, but also on the comparison between computed and observed vibronic intensities. The calculations indicate that the vibrational structure is dominated by false origins due to modes of hu, gu, and t1u symmetry, but contains also a number of combination bands based mainly on the Jahn−Teller active hg(1) mode.
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On the analysis of the Phosphorescence Spectrum of
Journal of Physics B: Atomic Molecular and Optical Physics, 1996Co-Authors: Fabrizia Negri, Giorgio OrlandiAbstract:The Phosphorescence Spectrum of , recently obtained in an alcane matrix at low temperature, has been modelled by means of semi-empirical quantum-chemical calculations. The transition is symmetry as well as spin-multiplicity forbidden. The Spectrum is successfully analysed in terms of the Herzberg - Teller mechanism combined with spin - orbit interactions. Its vibrational structure appears to be dominated by false origins due to modes of symmetry.
Lynmarie A. Posey - One of the best experts on this subject based on the ideXlab platform.
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Dynamic Stokes Shift of the Time-Resolved Phosphorescence Spectrum of ZnII-Substituted Cytochrome c
The journal of physical chemistry. B, 2013Co-Authors: Lynmarie A. Posey, Ryan J. Hendricks, Warren F. BeckAbstract:The dynamic Phosphorescence Stokes shift (PSS) response of ZnII-substituted cytochrome c (ZnCytc) was detected using the time-resolved Phosphorescence Spectrum of the intrinsic ZnII-porphyrin chromophore, which senses the motions of the surrounding protein and hydration shell. The Phosphorescence Spectrum of ZnCytc exhibits resolved vibronic structure arising from in-plane deformations of the porphyrin macrocycle, as is also observed in the absorption and fluorescence spectra. As the emission time increases, the Phosphorescence Spectrum shifts to the red without incurring a significant change in vibronic structure or line shape, so the shift arises from dynamic solvation, the reorganizational motions of the protein and solvent that occur in response to formation of the first excited triplet state. A correlation time of 294 ± 14 μs was obtained from a single-exponential fit to the time dependence of the mean emission frequency of the T(0,0) peak in the Phosphorescence Spectrum. This time scale is consisten...