Abstract
The use of hydroquinones as electron donors for in
vitro
models of Photosystem I has been investigated. Excited chlorophyll a (Chi*) was first reacted with methyl viologen (MV
2+
) to give ChI
+
and MV
t
. The subsequent reaction of ChI
t
with hydroquinones was slower than the comparable reaction with alternative electron donors such as cysteine or ascorbic acid, and an empirical relation was observed between the redox potential of the hydroquinone and the rate constant for its reaction with ChI
t
. This sequence of reactions stores 40 % of the energy available in the chlorophyll a triplet state, but no permanent storage of energy was achieved since MV
t
back-reacts with quinone to give a cyclic process.
Reference18 articles.
1. Biochim. biophys;Amesz J.;Acta.,1973
2. J. Am. chem;Bolton J. R.;Soc.,1972
3. The -Cation Radical of Chlorophyll a
4. Dokl;Brin G. P.;Akad. Nauk SSSR,1972
5. Primary photoprocesses in quinones and dyes II. Kinetic studies
Cited by
18 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献