Dipyrrolylquinoxaline-bridged hydrazones: a new class of chemosensors for copper(II)

作者：Guo Qian ni; Zhong Cheng; Lu Yun guo; Shi Chuang; Li Zao ying^*

来源：Journal of Inclusion Phenomena and Macrocyclic Chemistry, 2012, 72(1-2): 79-88.

DOI：10.1007/s10847-011-9941-6

• Chemosensor
• Selectivity
• Sensitivity

Novel 2,3-bis(1H-pyrrol-2-yl)quinoxaline-functionalized hydrazones were prepared and characterized as new chemosensors for copper(II) ion. The binding properties of the compounds 4, 5, 6 and 7 for cations were examined by UV-vis, fluorescence spectroscopy, and linear sweep voltammetric experiments (LSV). The results indicate that a 1:1 stoichiometric complex is formed between compound 4 (or 5, 6, 7) and copper(II) ion, and the association constant is 1.3 x 10(5) M-1 for 4, 2.1 x 10(6) M-1 for 5, 4.1 x 10(5) M-1 for 6 and 8.0 x 10(5) M-1 for 7, respectively. The recognition mechanism between compound 4 (or 5, 6, 7) and metal ion was discussed based on their electrochemical properties, absorbance changes, and the fluorescence quenching effect when they interact with each other. Control experiments revealed that compound 4 (or 5, 6, 7) has a highly selective response to copper (II) ion.

• 出版日期2012-2
• 单位武汉大学