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An anthraquinone-based highly selective colorimetric and fluorometric sensor for sequential detection of Cu2+ and S2− with intracellular application

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Abstract

2-(1-Amino-2-anthraquinonyliminomethyl)phenol (L) was facilely prepared as a spectroscopic probe by one step condensation between 1,2-diaminoanthraquinone and salicylaldehyde. The complexation of Cu2+ ions with L through 1 : 1 chelation resulted in a rapid pink-to-blue color change and significant quenching of the fluorescence at 604 nm in 1 : 1 THF : Tris–HCl buffer. The subsequent addition of S2− to this solution regenerated the initial spectrum of L as a result of L being released from the L–Cu2+ complex through a displacement mechanism, which makes L a dual-channel sensor for the naked eye detection of Cu2+ and S2− ions. The system has high selectivity toward Cu2+ and S2− ions even in the presence of other commonly coexisting ions and the detection limits were found to be 8.95 × 10−8 M and 1.36 × 10−7 M, respectively. Applicability of L to detect Cu2+ ions and S2− ions in tap water has been demonstrated. Paper strips were fabricated for the detection of Cu2+ and S2− by the colorimetric method. Furthermore, L has been successfully applied for cell imaging studies.

Graphical abstract: An anthraquinone-based highly selective colorimetric and fluorometric sensor for sequential detection of Cu2+ and S2− with intracellular application

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Publication details

The article was received on 12 Jun 2017, accepted on 19 Oct 2017 and first published on 20 Oct 2017


Article type: Paper
DOI: 10.1039/C7TB01596H
Citation: J. Mater. Chem. B, 2017, Advance Article
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    An anthraquinone-based highly selective colorimetric and fluorometric sensor for sequential detection of Cu2+ and S2− with intracellular application

    L. Hou, X. Kong, Y. Wang, J. Chao, C. Li, C. Dong, Y. Wang and S. Shuang, J. Mater. Chem. B, 2017, Advance Article , DOI: 10.1039/C7TB01596H

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