A multifunctional colorimetric chemosensor for cyanide and copper(II) ions

作者：Jo Tae Geun; Na Yu Jeong^*; Lee Jae Jun; Lee Myoung Mi; Lee Sun Young; Kim Cheal

来源：Sensors and Actuators B: Chemical , 2015, 211: 498-506.

DOI：10.1016/j.snb.2015.01.093

• Cyanide
• Copper ion
• Colorimetric
• ICT
• Theoretical calculations

We designed and synthesized a new asymmetric chemosensor 1 based on the combination of salicylaldehyde moiety and 2-amino-3-(((E)-(8-hydroxy-2,3,6,7-tetrahydro-1H,5H-pyrido[3,2,1-ij]quinolin-9yl)methylene)amino)maleonitrile followed by the condensation reaction of julolidine and 2,3-diaminomaleonitrile. The sensor 1 exhibited definite color changes from violet to pale yellow for CN- and Cu2+ separately in different solvent systems. The phenomena possibly originated from blue shift generated by the intramolecular charge transfer (ICT) transition. The complex formations were proposed to be in 1:1 ratio, based on Job plot, H-1 NMR titration and ESI-mass spectrometry analysis. Furthermore, the multifunctional colorimetric sensing ability of 1 was theoretically explained by DFT and TDDFT calculations.

• 出版日期2015-5