Issue 8, 2015

A turn-on fluorescent chemosensor for selective responses of copper(ii) ion pairs

Abstract

A fluorescent chemosensor was designed and synthesized by incorporating the imidazolium and 1,8-naphthalimide dye moieties into a preorganized tripodal receptor. The novel sensor displays high selectivity for Cu(ClO4)2 and Cu(NO3)2 over a wide range of tested metal ions, anions, and Cu2+ salt ion pairs. Upon adding Cu(ClO4)2 or Cu(NO3)2 to the probe solution, the fluorescence emission was significantly turned on concomitant with a blue shift in the emission energy, due to an anion-induced conformational change and coordination effect. Further binding model studies by 1H nuclear magnetic resonance spectroscopy and mass spectroscopy demonstrated that the receptor formed a 1 : 1 host–guest complex with Cu(ClO4)2 or Cu(NO3)2.

Graphical abstract: A turn-on fluorescent chemosensor for selective responses of copper(ii) ion pairs

Supplementary files

Article information

Article type
Paper
Submitted
07 Apr 2015
Accepted
26 May 2015
First published
26 May 2015

New J. Chem., 2015,39, 5991-5996

Author version available

A turn-on fluorescent chemosensor for selective responses of copper(II) ion pairs

D. Wang, Z. Gong, R. Sun and D. Zhao, New J. Chem., 2015, 39, 5991 DOI: 10.1039/C5NJ00860C

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