A novel iodination-triggered competitive coordination mechanism: indirect detection of Hg2+ and I- using a simple copillar[5]arene-based fluorometric sensor

作者：Chen, Jin-Fa; Cheng, Xiao-Bin; Li, Hui; Han, Bing-Bing; Lin, Qi^*; Zhang, You-Ming; Yao, Hong; Wei, Tai-Bao^*

来源：New Journal of Chemistry, 2017, 41(21): 12707-12712.

DOI：10.1039/c7nj01856h

• SELECTIVE FLUORESCENT CHEMOSENSOR
• AQUEOUS-SOLUTION
• SUPRAMOLECULAR CHEMISTRY
• ANION-BINDING
• MERCURIC ION
• METAL-IONS
• WATER
• RECOGNITION
• IODIDE
• CONJUGATE

A novel iodination-triggered competitive coordination has been developed for indirect detection of Hg2+ and I- using the simple copillar[5]arene-based sensor DBP5. While DBP5 could directly sense neither Hg2+ nor I-, the iodinated form of DBP5 detected Hg2+ with high selectivity and sensitivity (3.73 x 10(-8) mol L-1). Other cations including Fe3+, Co2+, Ca2+, Ni2+, Pb2+, Cd2+, Zn2+, Cr3+, Mg2+ and Ag+ had no obvious influence on the probing behavior. In addition, a system consisting of Hg2+ in a DBP5 solution highly selectively and sensitively (3.51 x 10(-7) mol L-1) detected I- based on a combined iodination and Hg2+ coordination process. It is a novel and efficient way for detection Hg2+ and I- in an aqueous solution. Moreover, the changes in the fluorescence of DBP5 resulting from the addition of Hg2+ and I- were utilized to form a molecular NAND logic gate.

• 出版日期2017-11-7
• 单位西北师范大学