Resonance Raman spectroscopy of metal-substituted bacteriochlorophylls: Characterization of Raman bands sensitive to bacteriochlorin conformation

Details

Serval ID
serval:BIB_AC89122C2EA5
Type
Article: article from journal or magazin.
Collection
Publications
Title
Resonance Raman spectroscopy of metal-substituted bacteriochlorophylls: Characterization of Raman bands sensitive to bacteriochlorin conformation
Journal
Journal of Raman Spectroscopy
Author(s)
Näveke A., Lapouge K., Sturgis J.N., Hartwich G., Simonin I., Scheer H., Robert B.
ISSN
0377-0486
Publication state
Published
Issued date
1997
Peer-reviewed
Oui
Volume
28
Number
8
Pages
599-604
Language
english
Abstract
Fourier transform (FT) preresonance Raman spectra of Mg-containing bacteriochlorophyll a (BChla) and the metal-substituted Zn-, Ni-, Cu- and Co-bactleriopheophytins a (BPhea) allowed the characterization of those vibrational modes sensitive to the nature of the central metal, through its effect on the core size of these molecules. Six of the Raman modes active in the excitation conditions used (1064 nm, in preresonance with the Q(y) transition of the metal-bacteriopheophytin molecules) are shown to be sensitive to the conformation of the dihydrophorbin ring. Comparison of the FT-Raman spectra of BChla under conditions where the central Mg ion is either five-or six-coordinate show that these modes may he used to distinguish modifications of the dihydrophorbin core size as small as 1 pm, and thus that they may be used for characterizing conformational strains on BChla molecules both in vitro and in vivo.
Keywords
PHOTOSYNTHETIC REACTION CENTER, RHODOBACTER-SPHAEROIDES, RHODOPSEUDOMONAS-VIRIDIS, MOLECULAR-STRUCTURE, CHLOROPHYLL-A, CORE SIZE, SPECTRA, FREQUENCIES, CRYSTAL, DONOR
Web of science
Create date
28/11/2011 15:18
Last modification date
20/08/2019 15:16
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