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

Détails

ID Serval
serval:BIB_AC89122C2EA5
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Resonance Raman spectroscopy of metal-substituted bacteriochlorophylls: Characterization of Raman bands sensitive to bacteriochlorin conformation
Périodique
Journal of Raman Spectroscopy
Auteur(s)
Näveke A., Lapouge K., Sturgis J.N., Hartwich G., Simonin I., Scheer H., Robert B.
ISSN
0377-0486
Statut éditorial
Publié
Date de publication
1997
Peer-reviewed
Oui
Volume
28
Numéro
8
Pages
599-604
Langue
anglais
Résumé
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.
Mots-clé
PHOTOSYNTHETIC REACTION CENTER, RHODOBACTER-SPHAEROIDES, RHODOPSEUDOMONAS-VIRIDIS, MOLECULAR-STRUCTURE, CHLOROPHYLL-A, CORE SIZE, SPECTRA, FREQUENCIES, CRYSTAL, DONOR
Web of science
Création de la notice
28/11/2011 15:18
Dernière modification de la notice
20/08/2019 15:16
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