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Note | Regular issue | Vol 81, No. 10, 2010, pp.2343-2350
Published online, 10th August, 2010
DOI: 10.3987/COM-10-11996
Substituent Effect of 7-Hydroxy-1-methylquinolinium Derivatives: A Photochemical Approach to Development of New Fluorescent pH Indicator

Naoko Senda, Atsuya Momotake, and Tatsuo Arai*

*Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Ten-nodai, Tsukuba-shi, Ibaraki 305-0006, Japan

Abstract

Substituent effect of N-methyl-7-hydroxyquinolinium derivatives on photochemical properties in aqueous solution has been investigated. The efficiency of fluorescence emission from excited zwitter ion enhanced significantly by introduction of methyl group(s). pH Dependence of photochemical behavior of the quinolinium derivatives is also investigated.