Electron spin echo of spin-polarised radical pairs in intact and quinone-reconstituted plant photosystem I reaction centres

被引：50

作者：

Dzuba, SA

Hara, H

Kawamori, A

Iwaki, M

Itoh, S

Tsvetkov, YD

机构：

[1] KWANSEI GAKUIN UNIV, FAC SCI, NISHINOMIYA, HYOGO 662, JAPAN

[2] RUSSIAN ACAD SCI, INST CHEM KINET & COMBUST, NOVOSIBIRSK 630090, RUSSIA

[3] NATL INST BASIC BIOL, OKAZAKI, AICHI 444, JAPAN

来源：

CHEMICAL PHYSICS LETTERS | 1997年 / 264卷 / 1-2期

关键词：

D O I：

10.1016/S0009-2614(96)01302-4

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Light-induced spin-polarised P700(+)A(1)(-) pairs in intact and quinone-reconstituted photosystem I reaction centres were studied by electron spin echo (ESE) spectroscopy. The observed strong ESE envelope modulation was attributed to magnetic dipolar and exchange interactions in the pairs. The values of these interactions were derived from Fourier-transformed time traces and appeared to be D = - 1.71 +/- 0.05 G and J = 0.010 +/- 0.015 G, respectively. A magnetic field effect on the radical pair lifetime induced by microwave pumping was observed. The reconstituted 2,3-dibromo-1,4-naphthoquinone was shown to be located in the same (A(1)) site as the native phylloquinone.

引用

页码：238 / 244

页数：7

共 21 条

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