A unidirectional energy transfer cascade process in a ruthenium junction self-assembled by α- and β-cyclodextrins

被引：41

作者：

Faiz, JA

Williams, RM

Silva, MJJP

De Cola, L

Pikramenou, Z

机构：

[1] Vant Hoff Inst Mol Sci, NL-1018 WV Amsterdam, Netherlands

[2] Univ Birmingham, Sch Chem, Birmingham B15 2TT, W Midlands, England

[3] Univ Munster, Inst Phys, D-48149 Munster, Germany

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2006年 / 128卷 / 14期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1021/ja058541h

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A Ru(II) complex, Ru(α2β), with a trisbipyridyl core and two different receptor sites, α- and β-cyclodextrins, acts as a junction to recognize photoactive guests based on anthracene, Anth, and Os(II), Os-ada, in aqueous solution. Upon light excitation of the self-assembled system Anth·Ru(α2β)·Os-ada, an energy cascade process takes place from the Anth guest to the Ru(α2β) core, and subsequently, the energy is funneled to the Os-ada guest. The rates of the two photoinduced processes are determined by time-resolved emission and transient absorption spectroscopic techniques. The system introduces a directed self-assembly approach to unidirectional wires that can lead to nanosized arrays by judicious selection of the individual components. Copyright © 2006 American Chemical Society.

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页码：4520 / 4521

页数：2

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