Issue 20, 2013

1,4-Dihydroxyanthraquinone–Cu2+ ensemble probe for selective detection of sulfide anion in aqueous solution

Abstract

Based on the displacement strategy, a new and simple sulfide-selective chemosignaling system was devised using 1,4-dihydroxyanthraquinone (DHAQ)–Cu2+ ensemble. In aqueous solution containing 10% ethanol (HEPES buffer, pH7.4), DHAQ could give rise to a visible yellow-to-pink color change with the addition of Cu2+. The resulting pink solution changed to yellow upon subsequent addition of sulfide anion. Moreover, DHAQ displays an “ON–OFF–ON” mode fluorescence change with alternately added Cu2+ and S2−. Experimental results show a low interference response towards other common anions. The selective switch-on fluorescence response of the sensing ensemble to S2− makes it suitable for sensing of S2− in aqueous solution. The detection limit is 5.98 × 10−8 M.

Graphical abstract: 1,4-Dihydroxyanthraquinone–Cu2+ ensemble probe for selective detection of sulfide anion in aqueous solution

Article information

Article type
Paper
Submitted
15 Jun 2013
Accepted
19 Jul 2013
First published
22 Jul 2013

Anal. Methods, 2013,5, 5493-5500

1,4-Dihydroxyanthraquinone–Cu2+ ensemble probe for selective detection of sulfide anion in aqueous solution

Y. Wang, H. Sun, L. Hou, Z. Shang, Z. Dong and W. Jin, Anal. Methods, 2013, 5, 5493 DOI: 10.1039/C3AY40977E

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