A triazole Schiff base-based selective and sensitive fluorescent probe for Zn2+: A combined experimental and theoretical study

作者：Yuan, Caixia; Liu, Xinyu; Wu, Yanbo; Lu, Liping^*; Zhu, Miaoli

来源：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy , 2016, 154: 215-219.

DOI：10.1016/j.saa.2015.10.035

• Fluorescence
• Zn ion
• Triazole
• Chemosensor
• Theoretical calculation

A triazole-Schiff base, 4-(5-Chloro-2-hydroxybenzylideneamino)-1H-1,2,4-triazole-5(4H)-thione (HL), exhibits the high selectivity and sensitivity for Zn2+ in the fluorescence spectrometry over other common metal ions, especially Cd2+ in DMSO:H2O (1:9, v/v) solution. A 1:1 binding ratio of Zn2+/L for the complex has been obtained by Uv-Vis titration experiments and Job's plot with the detection limit of 51 nmol/L The coordination mode of the complex in solution was further confirmed by density functional theory (OFT) calculations. Time-dependent density functional theory (TD-DFT) calculations indicate that a chelation-enhanced fluorescence (CHEF) effect occurs in the process of detecting Zn ion.

• 出版日期2016-2-5
• 单位山西大学