Issue 4, 2012

Zn(ii) complex of terpyridine for the highly selective fluorescent recognition of pyrophosphate

Abstract

Pyrophosphate ion (PPi) is crucial in varieties of biological processes and industrial applications, and thus it is very important how to recognize it with high selectivity. In this contribution, one terpyridine (tpy)-based fluorescent molecule, 4-(methylphenyl)-2,2′:6′,2′′-terpyridine (mptpy), has been reported to display a highly selective recognition for PPi in the presence of Zn(II). After exposure toward the Zn(II) ion, the characteristic emission of mptpy at 376 nm red-shifted to 406 nm with a strong enhancement upon an excitation at 280 nm, and then blue-shifted to 388 nm with the further addition of PPi. Absorption and fluorescence measurements showed that other phosphates including phosphate (Pi) as well as nucleotide triphosphates could not induce the spectral changes similar to PPi, demonstrating the unique binding effect between mptpy-Zn(II) and PPi. This process could also discriminate PPi from other inorganic anions. Therefore, a tpy-based fluorescence method for the highly selective recognition of PPi could be developed.

Graphical abstract: Zn(ii) complex of terpyridine for the highly selective fluorescent recognition of pyrophosphate

Supplementary files

Article information

Article type
Paper
Submitted
12 Sep 2011
Accepted
02 Dec 2011
First published
20 Dec 2011

Analyst, 2012,137, 953-958

Zn(II) complex of terpyridine for the highly selective fluorescent recognition of pyrophosphate

L. J. Liang, X. J. Zhao and C. Z. Huang, Analyst, 2012, 137, 953 DOI: 10.1039/C2AN15845K

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