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Open AccessArticle

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
Authors to whom correspondence should be addressed.
These two authors contributed equally.
Academic Editors: Jong Seung Kim and Min Hee Lee
Sensors 2017, 17(1), 35;
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)
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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MDPI and ACS Style

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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