Time-Dependent Resonance Raman Analysis of a Trinuclear Mixed Valence Coordination Complex

1996 ◽  
Vol 100 (14) ◽  
pp. 5745-5750 ◽  
Author(s):  
Brian W. Pfennig ◽  
Ying Wu ◽  
Ranjit Kumble ◽  
Thomas G. Spiro ◽  
Andrew B. Bocarsly
Keyword(s):  
Mixed Valence ◽  
Resonance Raman ◽  
Time Dependent ◽  
Coordination Complex ◽  
Raman Analysis

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

scholarly journals Short-Time Photodissociation Dynamics of 1-Chloro-2-Iodoethane From Resonance Raman Spectroscopy

1999 ◽  
Vol 19 (1-4) ◽  
pp. 71-74 ◽  
Author(s):  
Xuming Zheng ◽  
David Lee Phillips
Keyword(s):  
Raman Spectroscopy ◽  
Absorption Spectrum ◽  
Raman Spectra ◽  
Resonance Raman Spectroscopy ◽  
Resonance Raman ◽  
Time Dependent ◽  
Internal Excitation ◽  
Band Absorption ◽  
Resonance Raman Spectra ◽  
Short Time

We have obtained A-band absorption resonance Raman spectra of 1-chloro-2- iodoethane in cyclohexane solution. We have done preliminary time-dependent wavepacket calculations to simulate the resonance Raman intensities and absorption spectrum in order to learn more about the short-time photodissociation dynamics. We compare our preliminary results for 1-chloro-2-iodoethane with previous resonance Raman results for iodoethane and find that there appears to be more motion along non- C—I stretch modes for 1-chloro-2-iodoethane than for iodoethane. This is consistent with results of TOF photofragment spectroscopy experiments which indicate much more internal excitation of the photoproducts from 1-chloro-2-iodoethane photodissociation than the photoproducts from iodoethane photodissociation.

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.

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