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Sensors 2017, 17(1), 35;

A Cu2+-Selective Probe Based on Phenanthro-Imidazole Derivative

Chemical Engineering College, Qinghai University, Xining 810016, China
Qinghai Heavy Industry Vocational School, Xining 810101, China
Department of Materials Science and Engineering, University of Utah, Salt Lake City, UT 84112, USA
These two authors contributed equally.
Authors to whom correspondence should be addressed.
Academic Editors: Jong Seung Kim and Min Hee Lee
Received: 21 October 2016 / Revised: 20 December 2016 / Accepted: 21 December 2016 / Published: 24 December 2016
(This article belongs to the Special Issue Colorimetric and Fluorescent Sensor)
Full-Text   |   PDF [823 KB, uploaded 24 December 2016]   |  


A novel fluorescent Probe 1, based on phenanthro-imidazole has been developed as an efficient chemosensor for the trace detection of copper ions (Cu2+). Probe 1 demonstrated sensitive fluorescence quenching upon binding with Cu2+ through 1:1 stoichiometric chelation. The detection limit for Cu2+ ions was projected through linear quenching fitting to be as low as 2.77 × 10−8 M (or 1.77 ppb). The sensing response was highly selective towards Cu2+ with minimal influence from other common metal ions, facilitating the practical application of Probe 1 in trace detection. View Full-Text
Keywords: copper ion; fluorescent probe; phenanthro-imidazole copper ion; fluorescent probe; phenanthro-imidazole

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Cheng, D.; Liu, X.; Yang, H.; Zhang, T.; Han, A.; Zang, L. A Cu2+-Selective Probe Based on Phenanthro-Imidazole Derivative. Sensors 2017, 17, 35.

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