Resonance Raman Analysis of the Tryptophan Cation Radical

2014 ◽  
Vol 5 (17) ◽  
pp. 3009-3014 ◽  
Author(s):  
Hannah S. Shafaat ◽  
Judy E. Kim
Keyword(s):  
Resonance Raman ◽  
Cation Radical ◽  
Raman Analysis

Resonance Raman spectroscopy of peroxidase porphyrin π-cation radical intermediates

1995 ◽  
Vol 59 (2-3) ◽  
pp. 500
Author(s):  
J. Terner ◽  
C.M. Hosten ◽  
A.M. Sullivan ◽  
V. Palaniappan ◽  
M.M. Fitzgerald
Keyword(s):  
Raman Spectroscopy ◽  
Resonance Raman Spectroscopy ◽  
Resonance Raman ◽  
Cation Radical ◽  
Radical Intermediates

scholarly journals Resonance Raman Spectroscopy of Mn-Mgk Cation Complexes in GaN

Crystals ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 235 ◽  
Author(s):  
Andrii Nikolenko ◽  
Viktor Strelchuk ◽  
Bogdan Tsykaniuk ◽  
Dmytro Kysylychyn ◽  
Giulia Capuzzo ◽  
...  
Keyword(s):  
Relative Intensity ◽  
Resonance Raman Spectroscopy ◽  
Resonance Raman ◽  
Photonic Devices ◽  
Temperature Dependent ◽  
Raman Analysis ◽  
Electron Phonon Interaction ◽  
Resonance Enhancement ◽  
Resonance Process ◽  
Cation Complexes

Resonance Raman analysis is performed in order to gain insight into the nature of impurity-induced Raman features in GaN:(Mn,Mg) hosting Mn-Mgk cation complexes and representing a prospective strategic material for the realization of full-nitride photonic devices emitting in the infra-red. It is found that in contrast to the case of GaN:Mn, the resonance enhancement of Mn-induced modes at sub-band excitation in Mg co-doped samples is not observed at an excitation of 2.4 eV, but shifts to lower energies, an effect explained by a resonance process involving photoionization of a hole from the donor level of Mn to the valence band of GaN. Selective excitation within the resonance Raman conditions allows the structure of the main Mn-induced phonon band at ~670 cm−1 to be resolved into two distinct components, whose relative intensity varies with the Mg/Mn ratio and correlates with the concentration of different Mn-Mgk cation complexes. Moreover, from the relative intensity of the 2LO and 1LO Raman resonances at inter-band excitation energy, the Huang-Rhys parameter has been estimated and, consequently, the strength of the electron-phonon interaction, which is found to increase linearly with the Mg/Mn ratio. Selective temperature-dependent enhancement of the high-order multiphonon peaks is due to variation in resonance conditions of exciton-mediated outgoing resonance Raman scattering by detuning the band gap.

Resonance Raman analysis of charge-transfer reorganization energies in a covalent dicyanoethylene-aza-adamantane

1996 ◽  
Vol 258 (1-2) ◽  
pp. 87-93 ◽  
Author(s):  
David Lee Phillips ◽  
Ian R. Gould ◽  
J.W. Verhoeven ◽  
Dietrich Tittelbach-Helmrich ◽  
Anne B. Myers
Keyword(s):  
Charge Transfer ◽  
Resonance Raman ◽  
Raman Analysis ◽  
Reorganization Energies

Resonance Raman analysis of nonlinear solvent dynamics: Betaine-30 in ethanol

2004 ◽  
Vol 121 (22) ◽  
pp. 11195 ◽  
Author(s):  
Xihua Zhao ◽  
Jim A. Burt ◽  
Jeanne L. McHale
Keyword(s):  
Resonance Raman ◽  
Raman Analysis ◽  
Solvent Dynamics

A resonance Raman investigation of the cation radical of chlorophyll a and several derivatives

1990 ◽  
Vol 94 (10) ◽  
pp. 3968-3975 ◽  
Author(s):  
Randall L. Heald ◽  
Therese M. Cotton
Keyword(s):  
Chlorophyll A ◽  
Resonance Raman ◽  
Cation Radical

A Comparative Resonance Raman Analysis of Heme-Binding PAS Domains:  Heme Iron Coordination Structures of theBjFixL,AxPDEA1,EcDos, andMtDos Proteins†

Biochemistry ◽  
2002 ◽  
Vol 41 (15) ◽  
pp. 4819-4826 ◽  
Author(s):  
Takeshi Tomita ◽  
Gonzalo Gonzalez ◽  
Alan L. Chang ◽  
Masao Ikeda-Saito ◽  
Marie-Alda Gilles-Gonzalez
Keyword(s):  
Resonance Raman ◽  
Heme Iron ◽  
Heme Binding ◽  
Raman Analysis ◽  
Iron Coordination
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