Liu Hua, Li Fang-Xiong, Pi Yan, Wang Dun-Jia, Hu Yan-Jun, Zheng Jing
Hubei Collaborative Innovation Center for Rare Metal Chemistry, Hubei Key Laboratory of Pollutant Analysis and Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi 435002, China.
Hubei Collaborative Innovation Center for Rare Metal Chemistry, Hubei Key Laboratory of Pollutant Analysis and Reuse Technology, College of Chemistry and Chemical Engineering, Hubei Normal University, Huangshi 435002, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2015 Jun 15;145:588-593. doi: 10.1016/j.saa.2015.03.049. Epub 2015 Mar 9.
A novel bispyrazole derivative 2,6-bis(5-(4-methylphenyl)-1-H-pyrazol-3-yl)pyridine was synthesized and its structure was confirmed by (1)H NMR, FTIR, MS techniques and elemental analysis. The binding interactions of BMPP with Cd(2+), Co(2+), Pb(2+) and Cu(2+) ions were investigated in MeOH-H2O solution by fluorescence quenching technique at two temperatures (25 and 35°C). Their quenching constants KSV, binding constants K, binding sites n and thermodynamic parameters (ΔH, ΔG and ΔS) 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 ΔS-driven.
合成了一种新型双吡唑衍生物2,6-双(5-(4-甲基苯基)-1-H-吡唑-3-基)吡啶，并通过(1)H NMR、FTIR、MS技术和元素分析对其结构进行了确证。在MeOH-H2O溶液中，于两个温度(25和35°C)下采用荧光猝灭技术研究了BMPP与Cd(2+)、Co(2+)、Pb(2+)和Cu(2+)离子的结合相互作用。测定了它们的猝灭常数KSV、结合常数K、结合位点n和热力学参数(ΔH、ΔG和ΔS)。结果表明，金属离子通过形成双吡唑-金属配合物猝灭了双吡唑的固有荧光，其猝灭过程为静态猝灭机制。此外，相互作用过程是自发的，且主要由ΔS驱动。
