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论文类型：期刊论文

发表时间：2008-04-01

发表刊物：HELVETICA CHIMICA ACTA

收录刊物：SCIE、EI

卷号：91

期号：4

页面范围：635-645

ISSN号：0018-019X

摘要：A colorimetric sensor for fluoride ions based on a new sensing mechanism is reported. The colorimetric sensor contains an isomerizable enol-keto moiety as the recognition site and phenothiazine as chromogenic center. A color change visible to the naked eye is observed upon addition of fluoride ions to the solution of sensor 1 in aprotic solvents such as CHCl3 and MeCN. The sensor shows no colorimetric response for other halide ions. Enol-keto tautomerization is proposed to be responsible for the anion sensing of 1, based on UV/VlS absorption, H-1-NMR, and single-crystal structure analysis.