A Theoretical Analysis of Absorption Spectra of Photosynthetic Reaction Centers:  Mechanism of Temperature Dependent Peak Shift

2001 ◽  
Vol 105 (6) ◽  
pp. 1216-1224 ◽  
Author(s):  
C. H. Chang ◽  
M. Hayashi ◽  
K. K. Liang ◽  
R. Chang ◽  
S. H. Lin
Keyword(s):  
Theoretical Analysis ◽  
Absorption Spectra ◽  
Peak Shift ◽  
Reaction Centers ◽  
Photosynthetic Reaction Centers ◽  
Temperature Dependent

A Theoretical Analysis of Absorption Spectra and Dynamics of Photosynthetic Reaction Centers

2000 ◽  
Vol 47 (4A) ◽  
pp. 785-797 ◽  
Author(s):  
Chung-Hung Chang ◽  
Michitoshi Hayashi ◽  
Railing Chang ◽  
Kuo-Kan Liang ◽  
Tzyy-Schiuan Yang ◽  
...  
Keyword(s):  
Theoretical Analysis ◽  
Absorption Spectra ◽  
Reaction Centers ◽  
Photosynthetic Reaction Centers

scholarly journals Temperature dependent poly(L-lactide) crystallization investigated by Fourier transform terahertz spectroscopy

2021 ◽  
Author(s):  
Seiichiro Ariyoshi ◽  
Satoshi Ohnishi ◽  
Hikaru Mikami ◽  
Hideto Tsuji ◽  
Yuki Arakawa ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Absorption Spectra ◽  
Terahertz Spectroscopy ◽  
Thz Spectroscopy ◽  
Frequency Range ◽  
Temperature Dependent ◽  
Thz Absorption

Poly(L-lactide) (PLLA) was investigated by Fourier transform terahertz (THz) spectroscopy over the frequency range of 1.0 – 8.5 THz. THz absorption spectra were acquired for PLLA samples isothermally crystallized at...

scholarly journals Excitonic structure and charge separation in the heliobacterial reaction center probed by multispectral multidimensional spectroscopy

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Yin Song ◽  
Riley Sechrist ◽  
Hoang H. Nguyen ◽  
William Johnson ◽  
Darius Abramavicius ◽  
...  
Keyword(s):  
Reaction Center ◽  
Charge Separation ◽  
Electronic Spectroscopy ◽  
Spectroscopic Studies ◽  
Primary Electron ◽  
Reaction Centers ◽  
Separation Mechanism ◽  
Photosynthetic Reaction Centers ◽  
Density Analysis ◽  
Function Relationship

AbstractPhotochemical reaction centers are the engines that drive photosynthesis. The reaction center from heliobacteria (HbRC) has been proposed to most closely resemble the common ancestor of photosynthetic reaction centers, motivating a detailed understanding of its structure-function relationship. The recent elucidation of the HbRC crystal structure motivates advanced spectroscopic studies of its excitonic structure and charge separation mechanism. We perform multispectral two-dimensional electronic spectroscopy of the HbRC and corresponding numerical simulations, resolving the electronic structure and testing and refining recent excitonic models. Through extensive examination of the kinetic data by lifetime density analysis and global target analysis, we reveal that charge separation proceeds via a single pathway in which the distinct A0 chlorophyll a pigment is the primary electron acceptor. In addition, we find strong delocalization of the charge separation intermediate. Our findings have general implications for the understanding of photosynthetic charge separation mechanisms, and how they might be tuned to achieve different functional goals.

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