Identification of a new electronic transition in the Z form of poly(dG-dC)·poly(dG-dc) by infrared absorption and resonance Raman spectroscopy

Biopolymers ◽  
1984 ◽  
Vol 23 (10) ◽  
pp. 1931-1942 ◽  
Author(s):  
L. Chinsky ◽  
B. Jolles ◽  
A. Laigle ◽  
P. Y. Turpin ◽  
J. Taboury ◽  
...  

Resonance Raman spectroscopy involves laser excitation within an absorption band of the sample. Certain vibrational modes, those which couple to the electronic transition, exhibit greatly increased Raman scattering in the resulting spectrum. Sensitivity approaches that of absorption spectrophotometry, while the high resolution characteristic of vibrational spectroscopy is preserved, even in solution at room temperature. If the resonant electronic transition is associated with a site of biological activity, then the technique offers a sensitive probe for structural features of the site. Haem proteins afford particularly informative resonance Raman spectra, with a rich assortment of porphyrin ring vibrations, which can be classified and analysed via their symmetry properties. Certain of these frequencies are sensitive to the structural concomitants of spin- and oxidation-state changes of the haem group. These can be used to monitor the structural consequences of ligation or electron transfer in haem proteins.


2021 ◽  
Vol 50 (6) ◽  
pp. 2233-2242
Author(s):  
Elizabeth S. Carlton ◽  
Joshua J. Sutton ◽  
Ariel G. Gale ◽  
George C. Shields ◽  
Keith C. Gordon ◽  
...  

Augmented with TDDFT, solvatochromism and resonance Raman spectroscopy of RCp2Ti(C2Fc)2 complexes are consistent with the characterization of the lowest-energy electronic transition as a delocalized ethynylferrocene to TiIV charge transfer.


1989 ◽  
Vol 264 (31) ◽  
pp. 18280-18283
Author(s):  
S P Fodor ◽  
R Gebhard ◽  
J Lugtenburg ◽  
R A Bogomolni ◽  
R A Mathies

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