A Resonance Raman Enhancement Mechanism for Axial Vibrational Modes in the Pyridine Adduct of Myoglobin Proximal Cavity Mutant (H93G)

2012 ◽  
Vol 116 (35) ◽  
pp. 10514-10521 ◽  
Author(s):  
Stefan Franzen ◽  
Derek Brown ◽  
John Gaff ◽  
B. Delley
Keyword(s):  
Resonance Raman ◽  
Vibrational Modes ◽  
Enhancement Mechanism ◽  
Raman Enhancement

Resonance Raman studies of Escherichia coli sulfite reductase hemoprotein. 3. Bound ligand vibrational modes

Biochemistry ◽  
1989 ◽  
Vol 28 (13) ◽  
pp. 5477-5485 ◽  
Author(s):  
Sanghwa Han ◽  
John F. Madden ◽  
Lewis M. Siegel ◽  
Thomas G. Spiro
Keyword(s):  
Escherichia Coli ◽  
Resonance Raman ◽  
Sulfite Reductase ◽  
Vibrational Modes

Surface-Enhanced Resonance Raman Spectra Study of α,β,γ,δ-Tetra-(4-Trimethyl Ammonium Phenyl) Porphyrin

1993 ◽  
Vol 47 (3) ◽  
pp. 292-295 ◽  
Author(s):  
Jian Chen ◽  
Ji-Ming Hu ◽  
Zhi-San Xu ◽  
Rong-Sheng Sheng
Keyword(s):  
Group Theory ◽  
Phenyl Ring ◽  
Resonance Raman ◽  
Vibrational Modes ◽  
Molecular Symmetry ◽  
Resonance Raman Scattering ◽  
Porphyrin Macrocycle ◽  
Surface Enhanced ◽  
Ag Colloid ◽  
Resonance Raman Spectra

In the present study, surface-enhanced resonance Raman scattering (SERRS) spectra of α,β,γ,δ-tetra-(4-trimethyl ammonium phenyl) porphyrin [T(4-TAP)P] were obtained. With increasing pH, the relative intensities of the bands at 890 and 1244 cm−1 decreased. These bands were attributed to γ(C-H) and δ(Cm-phenyl), respectively. The bands at 420 and 576 cm−1, which were assigned to γ(phenyl-ring), were enhanced. The molecular symmetry of T(4-TAP)P is discussed in terms of group theory. The bands at 1554 and 1496 cm−1 could be attributed to the vibrational modes of the porphyrin macrocycle; the bands at 1460, 1362, and 1330 cm−1 were assigned to ν(C-C) + δ(C-H), ν(C-N) + δ(C-H), and ν(C-N), respectively. All these bands change in band intensities, positions and widths, with the potential changing from +0.2 V to −0.2 V. It was concluded that the adsorbed porphyrins underwent partial incorporation with Ag from the electrode, and the adsorbate assumed a flat orientation on the silver electrode as well as the Ag colloid surface.

scholarly journals Transient Resonance Raman Studies of Ru(II) Complexes in DNA and in Homogeneous Media

1999 ◽  
Vol 19 (1-4) ◽  
pp. 237-243
Author(s):  
Colin G. Coates ◽  
John J. McGarvey ◽  
Steven E. J. Bell ◽  
Luc Jacquet ◽  
John M. Kelly ◽  
...  
Keyword(s):  
Excited States ◽  
Resonance Raman ◽  
Homogeneous Solution ◽  
Vibrational Modes ◽  
Enhancement Pattern ◽  
Dna Complexes ◽  
Bridging Ligand ◽  
Transient Resonance ◽  
Homogeneous Media ◽  
Mlct State

Transient resonance Raman (TR2) spectroscopy has been used to investigate the metalligand charge-transfer (MLCT) excited states of Ru(II) polypyridyl complexes inDNAand in homogeneous solution. In DNA, complexes of the type [Ru(L)2(L′)]2+ were studied, where L=2, 2’-bipyridyl (bpy), 1,4, 5, 8-tetraazaphenanthrene (tap), and L′ dipyrido [3,2:a-2′ ,3′:c]-phenazine (dppz) or 1,4,5,8,9,12-hexaazatriphenylene (HAT). For [Ru(bpy)2(HAT)]2+, the enhancement pattern of vibrational modes in the TR2 spectra attributable to reduced HAT⋅− in the triplet MLCT state suggest perturbations to the intraligand transition of HAT⋅− in the presence of DNA. Transient RR spectra for [Ru(tap)2(dppz)]2+ are indicative of formation of the species RunII(tap⋅−)(tap)(dppz) by electron transfer from DNA to the triplet MLCT state of the complex.TR2 spectra for complexes of the type, [(Ru(bpy)2)n(L)]2+ , n=1, 2 where L=a triazole bridging ligand, illustrate the use of the technique as a probe of the response of MLCT states to the electronic environment.

scholarly journals Identification of heme propionate vibrational modes in the resonance Raman spectra of cytochrome c oxidase

2009 ◽  
Vol 394 (1) ◽  
pp. 141-143 ◽  
Author(s):  
Tsuyoshi Egawa ◽  
Hyun Ju Lee ◽  
Hong Ji ◽  
Robert B. Gennis ◽  
Syun-Ru Yeh ◽  
...  
Keyword(s):  
Cytochrome C ◽  
Cytochrome C Oxidase ◽  
Raman Spectra ◽  
Resonance Raman ◽  
Vibrational Modes ◽  
Resonance Raman Spectra

Resonance Raman enhancement for adenine and guanine residues

1994 ◽  
Vol 25 (10) ◽  
pp. 821-836 ◽  
Author(s):  
M. Majoube ◽  
Ph. Millié ◽  
P. Lagant ◽  
G. Vergoten
Keyword(s):  
Resonance Raman ◽  
Raman Enhancement

Resonance Raman enhancement of FeIVO stretch in high-valent iron porphyrins: An insight from TD-DFT calculations

2006 ◽  
Vol 100 (4) ◽  
pp. 744-750 ◽  
Author(s):  
Pawel M. Kozlowski ◽  
Jadwiga Kuta ◽  
Takehiro Ohta ◽  
Teizo Kitagawa
Keyword(s):  
Dft Calculations ◽  
Resonance Raman ◽  
Iron Porphyrins ◽  
Raman Enhancement ◽  
Td Dft ◽  
High Valent
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