Study on Spectral Properties of 5-(Dimethylamino)-N-(4-(2-(2-Hydroxybenzylidene)Hydrazinecarbonyl)Phenyl)Naphthalene-1-Sulfonamide for Selective Detection of Zn2+
WU Hong-mei1, GUO Yu1, ZHOU Peng2
1. School of Chemical and Environmental Engineering, Liaoning University of Technology, Jinzhou 121001, China 2. State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116012, China
Abstract：A novel dansyl sulfonamide-based fluorescence probe DH1 [(E)-5-(dimethylamino)-N-(4-(2-(quinolin-2-ylmethylene)hydrazinecarbonyl)phenyl)aphthalene-1-sulfonamide] was synthesized for detection of Zn2+. Spectral properties of DH1 such as UV-Vis, fluorescence spectra and ESI-MS for recognition of Zn2+ were studied. Spectrophotometric titration and ESI-MS spectra indicate the formation of a 1∶1 complex of Zn2+ with DH1. The results show that DH1 has high quantum yield of 0.53 and low the detection limit of 1.0×10-7 mol·L-1 for detection of Zn2+ in acetonitrile/water(9∶1, volume ratio). Moreover, no fluorescence intensity changes were observed in the presence of other common metal ions such as K+, Li+, Na+, Mg2+, Ca2+, Cr3+, Mn2+, Ni2+, Pb2+, Cu2+, Cd2+, Co2+, Fe2+ and Hg2+, indicating that DH1 has excellent selectivity and high sensitivity for detection of Zn2+.
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