PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.
It has been shown that among the great diversity of available vibrational modes there are two types so called hμ- and hα-
hyston modes in the light-harvesting (LH) antennas and in the complexes of the reaction centers (RCs), which produce
high modulated broadening of excitonic spectra with radically different temperature behavior. At the same time the hμ-
and hα-modes initiate different activationless electron transfer (ET) processes in the RCs. Novel formulas is presented,
which making it possible to describe known experimental data on the half-width of the B800, B850 absorption for LH2
antennas and the P870 and P960 absorption for RCs as well as on the temperature effect on the ET rate. The primary ET
is considered as a resonant nonradiative transition between P* and P+BA- states with next stabilization (P is a special
pair, BA is an accessory bacteriochlorophyll in A-branch of RC). It has been shown that the hα-mode with own frequency
in the range of 130-150 cm-1 controls the primary ET from P* to bacteriopheophytin (HA).The ET matrix elements are of
12.7 ± 0.9 and 12.0 ± 1.2 cm-1 for Rps. viridis and Rb. sphaeroides respectively. An oscillation mechanism is discussed
for ET from P* to BA and then to HA. It is assumed that water fulfils the transmission function in the primary ET. It is
obtained that the hμ-mode of 304 cm-1 governs the secondary ET from HA to ubiquinone in Rb. sphaeroides RC.
Vladimir S. Pavlovich
"Conception of hystons in bacterial photosynthesis: spectra, exciton dynamics, and electron transfer", Proc. SPIE 6727, ICONO 2007: Nonlinear Laser Spectroscopy and High-Precision Measurements; and Fundamentals of Laser Chemistry and Biophotonics, 67271T (9 July 2007); https://doi.org/10.1117/12.752399
ACCESS THE FULL ARTICLE
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.
The alert did not successfully save. Please try again later.
Vladimir S. Pavlovich, "Conception of hystons in bacterial photosynthesis: spectra, exciton dynamics, and electron transfer," Proc. SPIE 6727, ICONO 2007: Nonlinear Laser Spectroscopy and High-Precision Measurements; and Fundamentals of Laser Chemistry and Biophotonics, 67271T (9 July 2007); https://doi.org/10.1117/12.752399