Photophysics and acid-base chemistry of Re(CH3bpyCOOH)(CO) 3X (X=CI-, and imidazole) complexes

Ren Jay Lin, I. Jy Chang

研究成果: 雜誌貢獻期刊論文同行評審

5 引文 斯高帕斯(Scopus)

摘要

Rhenium tricarbonyl (4′-methyl-2,2′-bipyridine-4-carboxylic acid) X (where X is Cl- and imidazole) complexes have been prepared. These two complexes exhibit similar spectroscopic properties. The metal-to-ligand charge-transfer (MLCT) absorption and the corresponding emission are observed. This charge transfer band is highly solvent dependent. Due to the stronger electron-withdrawing ability of the -COOH (in comparison to the -COO- group), the MLCT band has red-shifted during protonation. Emission quantum yields are dramatically reduced while lifetime remains similar upon protonation. These behaviors are typical in static quenching mechanism by protons. The ground state pKa of Re(CO)3(CH 3bbpyCOOH)Cl obtained from the pH titration curve of the complex absorption at 409 nm was 2.5.

原文英語
頁(從 - 到)161-164
頁數4
期刊Journal of the Chinese Chemical Society
49
發行號2
DOIs
出版狀態已發佈 - 2002 一月 1

ASJC Scopus subject areas

  • Chemistry(all)

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