Selective fluorescence sensor for Cu2+ with a novel triazole Schiff-base derivative with coumarin units

Heterocyclic communications

article

Wei Wang¹  Wen-Jing Yuan¹  Qing-Lei Liu¹  Ya-Nan Lei¹  Shuai Qi¹  Yan Gao² 

[1] School of Perfume and Aroma Technology, Shanghai Institute of Technology;School of Chemical Engineering, University of Science and Technology Liaoning

关键词: cupric ion;    coumarin;    fluorescent;    recognition;    Schiff bases;    UV-vis;   

DOI  :  10.1515/hc-2014-0117

学科分类：内科医学

来源: De Gruyter

【 摘 要 】

Novel triazole Schiff-base derivative 3 bearing a coumarin unit was synthesized by the reaction of 4-formylbenzocoumarin ( 1 ) with 3,5-diphenyl-4-amino-1,2,4-triazole ( 2 ). The structure of the product was characterized by means of IR, MS, 1 H NMR, 13 C NMR, and elemental analysis. The UV-vis absorption and fluorescence emission spectra of compound 3 exhibit blue-shifted absorption and fluorescent enhancement upon chelation to cupric ion. Fluorometric titration revealed a 2:1 ligand to metal ratio in the complex and the binding constant of 4.62×10 6 m -1 .

【 授权许可】

CC BY|CC BY-NC-ND