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Theoretical investigation of the electronic structure of molecules involved in green-plant photosynthesis

DSpace at IIT Bombay

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Title Theoretical investigation of the electronic structure of molecules involved in green-plant photosynthesis
 
Creator DATTA, SN
JHA, A
 
Subject quantum-chemical calculation
reaction centers
photosystem-ii
excitation-energy
rhodopseudomonas-sphaeroides
q(ii) q(b)
protein
complex
plastoquinone
chloroplast
 
Description Some of the advances made in our theoretical understanding of the Z scheme of photosynthesis in green plants are reviewed here. The Z-scheme embodies a sequence of light-activated, and very fast, electron transfer processes. The molecules under consideration belong to the central diagonal arm of the Z-scheme. These are plastoquinone-histidine complexes Q(I) and Q(II), plastoquinones (PQ), cytochrome-f and Rieske protein. The electronic structures of these species have been investigated by semiempirical quantum chemical methods - CNDO/2 and INDO. In one case, the rate of electron transfer (from Q(I)(-) to Q(II), and from Q(I)(-) to Q(II)(-)) has been theoretically determined. Results of these investigations serve in two ways. On the one hand, theoretical calculations confirm the observed redox potentials, and the rate of electron transfer On the other hand, a set of fascinating information can be obtained, which clarifies several ideas about the structure, function and placement of these biological molecules in the condensed phase of chloroplast.
 
Publisher NATL INST SCIENCE COMMUNICATION
 
Date 2011-08-19T08:03:45Z
2011-12-26T12:56:08Z
2011-12-27T05:44:22Z
2011-08-19T08:03:45Z
2011-12-26T12:56:08Z
2011-12-27T05:44:22Z
2000
 
Type Article
 
Identifier INDIAN JOURNAL OF CHEMISTRY SECTION A-INORGANIC BIO-INORGANIC PHYSICAL THEORETICAL & ANALYTICAL CHEMISTRY, 39(1-3), 120-131
0376-4710
http://dspace.library.iitb.ac.in/xmlui/handle/10054/10282
http://hdl.handle.net/10054/10282
 
Language en