Luminescence quenching of Re(i) molecular rectangles by quinones

Thangamuthu Rajendran, Balasubramanian Manimaran, Rong Tang Liao, Yen Hsiang Liu, Pounraj Thanasekaran, Ren Jay Lin, I. Jy Chang, Pi Tai Chou, Ramasamy Ramaraj, Seenivasan Rajagopal*, Kuang Lieh Lu

*此作品的通信作者

研究成果: 雜誌貢獻期刊論文同行評審

15 引文 斯高帕斯(Scopus)

摘要

The rhenium-based rectangles [{Re(CO)3(μ-bpy)Br}{Re(CO) 3(μ-L)Br}]2 (I, L = 4,4′-dipyridylacetylene (dpa); II, L = 4,4′-dipyridylbutadiyne (dpb); III, L = 1,4-bis(4′-pyridylethynyl)benzene (bpeb); bpy = 4,4′-bipyridine) are emissive in solution at room temperature. The presence of extended π conjugation leads to an increase in electron delocalization, which, in turn, results in improved luminescence and lower nuclear reorganization energy. These rectangles, upon electronic excitation, undergo facile electron transfer (ET) reactions with quinones and both the dynamic and static quenching contribute to the reaction. Spectral and electrochemical measurements show that quinone 7,7,8,8-tetracyanoquinodimethane (TCNQ) binds strongly to rectangle I. The driving force dependence of ket, deduced from the luminescence quenching of rectangles with quinones, can be well accounted for within the context of the Marcus theory of electron transfer.

原文英語
頁(從 - 到)2928-2935
頁數8
期刊Dalton Transactions
39
發行號11
DOIs
出版狀態已發佈 - 2010

ASJC Scopus subject areas

  • 無機化學

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