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

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)10953-10960
Number of pages8
JournalJournal of Physical Chemistry A
Volume111
Issue number43
DOIs
Publication statusPublished - 2007 Nov 1

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Fingerprint Dive into the research topics of 'Aggregate of alkoxy-bridged Re(I)-rectangles as a probe for photoluminescence quenching'. Together they form a unique fingerprint.

  • Cite this

    Thanasekaran, P., Wu, J. Y., Manimaran, B., Rajendran, T., Chang, I-J., Rajagopal, S., Lee, G. H., Peng, S. M., & Lu, K. L. (2007). Aggregate of alkoxy-bridged Re(I)-rectangles as a probe for photoluminescence quenching. Journal of Physical Chemistry A, 111(43), 10953-10960. https://doi.org/10.1021/jp0742315