Issue 41, 2015

Selective and visual Ca2+ ion recognition in solution and in a self-assembly organogel of the terpyridine-based derivative triggered by ultrasound

Abstract

A new kind of terpyridine-based Ca2+ sensor TS was designed and studied based on the internal charge transfer (ICT). In the diluted solution state, TS sensed Ca2+ and Mg2+ ions among test ions via an “off–on” approach as seen from fluorescence spectra of test ions. Moreover, TS was able to form stable fluorescent gels in organic solvents accelerated by ultrasound, indicating the ultrasound responsive properties of TS molecules. The S-gel of TS could be successfully used to selectively recognize Ca2+ through fluorescent emission color and morphological changes, which was different from that of the solution state. It was predicated that the competition between the self-assembly of TS molecules and the host–guest interaction of TS with Ca2+ or Mg2+ was responsible for the sensing properties. To the best of our knowledge, this is the first example that organogels could selectively sense Ca2+ ions.

Graphical abstract: Selective and visual Ca2+ ion recognition in solution and in a self-assembly organogel of the terpyridine-based derivative triggered by ultrasound

Supplementary files

Article information

Article type
Paper
Submitted
25 Jul 2015
Accepted
19 Aug 2015
First published
19 Aug 2015

Soft Matter, 2015,11, 8100-8104

Author version available

Selective and visual Ca2+ ion recognition in solution and in a self-assembly organogel of the terpyridine-based derivative triggered by ultrasound

L. Geng, Y. Li, Z. Wang, Y. Wang, G. Feng, X. Pang and X. Yu, Soft Matter, 2015, 11, 8100 DOI: 10.1039/C5SM01851J

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