Fluorescence chemosensor containing 4-methyl-7-coumarinyloxy, acetylhydrazono and N-phenylaza-15-crown-5 moieties for K+ and Ba2+ ions

Heterocyclic communications

article

Qiang Zhang¹  Kaifei Duan¹ 

[1]College of Chemical and Environmental Science, Inner Mongolia Normal University

关键词: barium ion;    chemosensor;    detection;    fluorescence;    potassium ion;    synthesis;   

DOI  :  10.1515/hc-2018-0031

学科分类：内科医学

来源: De Gruyter

【 摘 要 】

A new aza-15-crown-5 derivative 1 bearing coumarin and hydrazone moieties was synthesized and characterized. The fluorescent sensing behavior and selectivity of 1 toward different metal ions in ethanol were investigated. There are 4-fold and 2-fold fluorescence enhancements of 1 at λ em =406 nm upon addition of five equivalents of K + and Ba 2+ , respectively. The fluorescence titration revealed the stoichiometry of 1:1 for 1 -K + 1 -Ba 2+ complexes and the binding constants (lg K s ) of 4.11 for 1 -K + and 3.61 for 1 -Ba 2+ . Compound 1 can be used as a fluorescent chemosensor for K + and Ba 2+ through discriminable photoresponse signals. The calculated detection limits for K + and Ba 2+ are 2.28 μ m and 5.21 μ m , respectively.

【 授权许可】

CC BY|CC BY-NC-ND