Triazole- and azo-coupled calix[4]arene as a highly sensitive chromogenic sensor for Ca2+ and Pb2+ ions

Kai Chi Chang, In Hao Su, Gene Hsiang Lee, Wen-Sheng Chung*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

106 Scopus citations

Abstract

A novel chromogenic calix[4]arene 3, which has within a molecule both the triazoles and the hydroxyl azophenols as the metal-binding sites and the azophenol moiety as a coloration sites was designed and synthesized. Calix[4]arene 3 is highly sensitive to Ca2+ and Pb2+ ions, which can be detected by the naked eye. Furthermore, the association constants for the 1:1 complexes of 3·Ca2+ and 3·Pb2+ were determined to be 7.06 × 104 M-1 and 8.57 × 103 M-1, respectively.

Original languageEnglish
Pages (from-to)7274-7278
Number of pages5
JournalTetrahedron Letters
Volume48
Issue number41
DOIs
StatePublished - 8 Oct 2007

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