Elucidation of acceptor-acceptor interactions in a Ru(II) supramolecular photosynthetic model complex

被引：5

作者：

Bossmann, SH

Ottaviani, MF

van Loyen, D

Dürr, H

Turro, C

机构：

[1] Univ Karlsruhe, Lehrstuhl Umweltmesstech, D-76128 Karlsruhe, Germany

[2] Univ Florence, Dept Chem, I-50121 Florence, Italy

[3] Univ Saarland, Fachbereich Organ Chem 11 2, D-66041 Saarbrucken, Germany

[4] Ohio State Univ, Dept Chem, Columbus, OH 43210 USA

来源：

CHEMICAL COMMUNICATIONS | 1999年 / 24期

关键词：

D O I：

10.1039/a904525b

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The interaction between the two viologen acceptors in a TEMPO-labeled Ru(II) bisviologen photosynthetic model system assembly has been investigated using EPR spectroscopy; the results are consistent with no viologen-viologen spin exchange in water at temperatures above 5 degrees C, although upon crystallization (less than or equal to 2 degrees C) strong spin exchange is observed; the strong spin exchange interaction results in a single broad line at temperatures below 1 degrees C, unlike the three broad lines measured for free TEMPO upon solvent freezing; this evidence for the TEMPO-labeled complex indicates that there is no interaction of the two viologen acceptors in the supramolecular Ru(II) bis-viologen structure in solution, thus making it indeed a viable model for the photosynthetic reaction center.

引用

页码：2487 / 2488

页数：2

共 12 条

[1]

[Anonymous], SPIN LABELING THEORY

[2]

Berliner LJ, 1976, SPIN LABELING THEORY, V1

[3] Intramolecular electron transfer between noncovalently linked donor and acceptor in a [2]catenane [J].