Fluorescence quenching study of 2,6-bis(5-(4-methylphenyl)-1-H-pyrazol-3-yl)pyridine with metal ions

被引：16

作者：

Liu, Hua ^{[1
]}

Li, Fang-Xiong ^{[1
]}

Pi, Yan ^{[1
]}

Wang, Dun-Jia ^{[1
]}

Hu, Yan-Jun ^{[1
]}

Zheng, Jing ^{[1
]}

机构：

[1] Hubei Normal Univ, Hubei Collaborat Innovat Ctr Rare Met Chem, Hubei Key Lab Pollutant Anal & Reuse Technol, Coll Chem & Chem Engn, Huangshi 435002, Peoples R China

来源：

SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2015年 / 145卷

基金：

中国国家自然科学基金;

关键词：

2,6-Bis(5-(4-methylphenyl)-1-H-pyrazol-3-yl)pyridine; Fluorescence quenching; Quenching constant; Thermodynamic parameters; BOVINE SERUM-ALBUMIN; PYRAZOLE DERIVATIVES; BINDING;

D O I：

10.1016/j.saa.2015.03.049

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

A novel bispyrazole derivative 2,6-bis(5-(4-methylphenyl)-1-H-pyrazol-3-yl)pyridine was synthesized and its structure was confirmed by H-1 NMR, FTIR, MS techniques and elemental analysis. The binding interactions of BMPP with Cd2+, Co2+, Pb2+ and Cu2+ ions were investigated in MeOH-H2O solution by fluorescence quenching technique at two temperatures (25 and 35 degrees C). Their quenching constants K-SV, binding constants K, binding sites n and thermodynamic parameters (Delta H, Delta G and Delta S) were determined. The results indicated that the metal ions quenched the intrinsic fluorescence of the bispyrazole by forming the bispyrazole-metal complexes and their quenching process was a static quenching mechanism. In addition, the process of interaction was spontaneous and mainly Delta S-driven. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：588 / 593

页数：6

共 21 条

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