Triazole-modified calix[4]crown as a novel fluorescent on-off switchable chemosensor

Kai Chi Chang, In Hao Su, Annamalai Senthilvelan, Wen-Sheng Chung*

*Corresponding author for this work

Research output: Contribution to journalArticle

194 Scopus citations

Abstract

A novel fluorescent on-off switchable chemosensor 1 with two different types of cationic binding sites is synthesized, which is composed of a triazole-modified calix[4]crown in the 1,3-alternate conformation. Among 15 metal ions examined, the fluorescence of 1 was strongly quenched by Hg 2+, Cu2+, Cr3+, and Pb2+; however, the revival of emission from the strongly quenched 1-Pb2+ complex was achievable by the addition of K++, Ba2+, or Zn 2+ ions. Thus, metal ion exchange can trigger an on-off switchable fluorescent chemosensor.

Original languageEnglish
Pages (from-to)3363-3366
Number of pages4
JournalOrganic Letters
Volume9
Issue number17
DOIs
StatePublished - 16 Aug 2007

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