title: A new unsymmetrical azine derivative based on coumarin group as dual-modal sensor for CN-and fluorescent "OFF-ON" for Zn2.
abstract: A simple chemosensor YS based on coumarin group was designed and synthesized. Its structure was determined by single crystal X-ray diffraction analysis. In the presence of cyanide the sensor showed an immediate visible change in color from colorless to pale yellow by naked-eyes and produced a strong blue fluorescence rapidly in DMSO/H2O (3:7, v/v). The detection limit on fluorescence response of the sensor to CN-is down to 1.69×10-7M. In addition YS could show fluorescence turn-on response rapidly for Zn2+over other metals ions such as Fe3+, Hg2+, Ag+, Ca2+, Cu2+, Co2+, Ni2+, Cd2+, Pb2+, Cr3+and Mg2+in aqueous solutions. Notably, this sensor served as a molecular switch, which was controlled by Zn2+and EDTA cyclically. Test strips based on YS were fabricated, which could act as a convenient and efficient CN-and Zn2+test kit. This chemosensor could achieve the detection of two ions, which need not depend on two different sensors.
authors.affiliation: College of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu 730070, PR China. Electronic address: hujinghan62@163.com.
authors.forename: Jing-Han
authors.initials: JH
authors.lastname: Hu
authors.affiliation: College of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu 730070, PR China.
authors.forename: You
authors.initials: Y
authors.lastname: Sun
authors.affiliation: College of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu 730070, PR China.
authors.forename: Jing
authors.initials: J
authors.lastname: Qi
authors.affiliation: College of Chemical and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, PR China.
authors.forename: Qiao
authors.initials: Q
authors.lastname: Li
authors.affiliation: College of Chemical and Chemical Engineering, Northwest Normal University, Lanzhou, Gansu 730070, PR China. Electronic address: weitaibao@126.com.
authors.forename: Tai-Bao
authors.initials: TB
authors.lastname: Wei
keywords: CN(−); Chemosensor; Coumarin; DFT calculations; Zn(2+)