High selective and sensitive optical probe with effective recognition for Cu2+ based on a novel aniline squarylium dye
作者:Miao Zhao、Yuzhe Zhang、Xudong Zheng、Zhongyu Li、Song Xu
DOI:10.1016/j.inoche.2020.108198
日期:2020.11
Novel aniline squarylium dye, (Z)-3-hydroxy-2-((2-(isobutylthio) phenyl) amino) -4-((2-(isobutylthio) phenyl) imino) cyclobut-2-en-1-one (IPA) has been synthesized. It was found that IPA solution (MeCN/H2O, 4:1, v/v, 3.0 x 10-5 M) can effectively identify Cu2+ with the existence of competing cations (Ba2+, Na+, Ca2+, Cd2+, Fe3+, Cr3+, Zn2+, Co2+, K+, Ag+, Pb2+, Ni2+, Al3+, Mg2+). Meanwhile, IPA-Cu2+ induced an obvious color change, which provided a "naked eye" detection. The detection limit of IPA-Cu2+ is determined to be ap-proximately 8.06 x 10(-6) M. The job's plot showed that the stoichiometry between IPA and Cu2+ is 1:1. In addition, the test strips of IPA showed a high selectivity to Cu2+.