Aggregate of alkoxy-bridged Re(I)-rectangles as a probe for photoluminescence quenching

P. Thanasekaran, Jing Yun Wu, Bala Manimaran, T. Rajendran, I-Jy Chang, S. Rajagopal, Gene Hsiang Lee, Shie Ming Peng, Kuang Lieh Lu

研究成果: 雜誌貢獻期刊論文同行評審

27 引文 斯高帕斯(Scopus)

摘要

Alkoxy-bridged rhenium(I) rectangles [{(CO)3Re(μ-OR) 2Re(CO)3}2(μ-bpy)2] (1, R = C 4H9; 2,R = C8H17; 3, R = C 12H25; bpy = 4,4′-bipyridine) comprising long alkyl chains form optically transparent aggregates and exhibit luminescence enhancement in the presence of water. The aggregation of Re(I)-rectangle was followed using a light-scattering technique. Presumably, the enhanced luminescence efficiency resulted from restriction of torsional molecular motion in the aggregates. In addition, the rate of bimolecular quenching of Re(I)-aggregates in the triplet excited state by various electron donors (amines) and acceptors (quiñones) was efficient. These results indicate that the excited state of aggregated Re(I) surfactants with an electron acceptor and donor facilitate the electron-transfer quenching process after they became preassociated inside the Re(I)-aggregated species. These synthesized compounds may be useful fluorescent materials in optoelectronic applications.

原文英語
頁(從 - 到)10953-10960
頁數8
期刊Journal of Physical Chemistry A
111
發行號43
DOIs
出版狀態已發佈 - 2007 十一月 1

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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