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Issue 103, 2016, Issue in Progress
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A highly sensitive and selective turn-on fluorescent probe for Pb(II) ions based on a coumarin–quinoline platform

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Abstract

A new fluorescent probe T1, which contained a coumarin fluorophore with a triazole substituted 8-hydroxyquinoline (8-HQ) receptor and a Schiff base spacer, was rationally designed and synthesized. It displayed a high affinity towards Pb2+ ions with a dissociation constant (Kd) of 0.1 μM and possessed a high selectivity for Pb2+ ions. A visually detectable colour change from colourless to yellow and a 30-fold fluorescence enhancement were observed upon addition of Pb2+. Experiments also indicated that a 1 : 1 stoichiometry of T1 with Pb2+ inhibited the photo-induced electron transfer (PET) process, resulting in the increase of fluorescence intensity.

Graphical abstract: A highly sensitive and selective turn-on fluorescent probe for Pb(ii) ions based on a coumarin–quinoline platform

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Publication details

The article was received on 04 Aug 2016, accepted on 18 Oct 2016 and first published on 18 Oct 2016


Article type: Communication
DOI: 10.1039/C6RA19734E
Citation: RSC Adv., 2016,6, 100696-100699
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    A highly sensitive and selective turn-on fluorescent probe for Pb(II) ions based on a coumarin–quinoline platform

    G. Wu, M. Li, J. Zhu, K. W. C. Lai, Q. Tong and F. Lu, RSC Adv., 2016, 6, 100696
    DOI: 10.1039/C6RA19734E

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