Premium
Investigation of models for photosynthetic electron acceptors
Author(s) -
Bauscher M.,
Nabedryk E.,
Bagley K.,
Breton J.,
Mäntele W.
Publication year - 1990
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1016/0014-5793(90)80668-9
Subject(s) - quinone , photochemistry , photosynthesis , chemistry , photosynthetic reaction centre , electron acceptor , spectral line , electron transport chain , infrared spectroscopy , infrared , redox , stereochemistry , electron transfer , physics , organic chemistry , biochemistry , optics , astronomy
In order to gain more information about the binding and interaction of quinones acting as electron acceptors in photosynthetic reaction centers, infrared spectra of ‘model” quinones and their reduced species (semiquinones, quinone dianions and quinols) were recorded in a spectroelectrochemical cell. The frequencies and the extinction coefficients of the quinone C = O and C = C stretching vibrations which are shifted upon reduction were obtained in different solvents. These spectra are used to estimate the contribution of quinone reduction to light‐induced infrared difference spectra between the charge‐separated and the relaxed state of photosynthetic reaction centers.