Chem. J. Chinese Universities ›› 2013, Vol. 34 ›› Issue (11): 2483.doi: 10.7503/cjcu20130669

• Analytical Chemistry • Previous Articles     Next Articles

Synthesis of N,N-Dimethyl Pyridine Benzaldehyde-4-dimethylaminobenzoylhydrazone and Its Application for Selective Recognizing Cu2+

HAN Bing-Xing, WU Fang-Ying   

  1. Department of Chemistry, Nanchang University, Nanchang 330031, China
  • Received:2013-07-16 Online:2013-11-10 Published:2013-10-11

Abstract:

A fluorescence chemosensor, N,N-dimethyl pyridine benzaldehyde-4-dimethylaminobenzoylhydrazone was synthesized and confirmed by means of 1H NMR, 13C NMR and MS. The interactions between the metal ions and compound 1 were investigated via fluorescence spectrophotometry and UV-Vis spectroscopy. The results indicated that compound 1 showed a highly selective response to Cu2+. The addition of Cu2+ induced a dramatic enhancement in the fluorescence of compound 1 by 12.5 folds, whereas the other metal ions had little fluorescence quenching, for example Fe3+, Zn2+, Pb2+, Hg2+, Cd2+, Co2+, Ni2+, Li+, K+, Ca2+, Mg2+ and Ag+. Double reciprocal linear plot method showed that compound 1 coordinated with Cu2+ to form 1: 1 stable luminescent complex and the binding constants was ca. 2.0×107 L/mol.

Key words: N,N-Dimethyl pyridine benzaldehyde-4-dimethylaminobenzoylhydrazone, Cu2+, Fluorescence enhancement

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