{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,11]],"date-time":"2026-03-11T01:26:38Z","timestamp":1773192398538,"version":"3.50.1"},"reference-count":33,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2016,12,24]],"date-time":"2016-12-24T00:00:00Z","timestamp":1482537600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["21362027"],"award-info":[{"award-number":["21362027"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Qinghai Science &amp; Technology Department of China","award":["2016-HZ-806"],"award-info":[{"award-number":["2016-HZ-806"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>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 \u00d7 10\u22128 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.<\/jats:p>","DOI":"10.3390\/s17010035","type":"journal-article","created":{"date-parts":[[2016,12,28]],"date-time":"2016-12-28T11:22:14Z","timestamp":1482924134000},"page":"35","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":30,"title":["A Cu2+-Selective Probe Based on Phenanthro-Imidazole Derivative"],"prefix":"10.3390","volume":"17","author":[{"given":"Dandan","family":"Cheng","sequence":"first","affiliation":[{"name":"Chemical Engineering College, Qinghai University, Xining 810016, China"}]},{"given":"Xingliang","family":"Liu","sequence":"additional","affiliation":[{"name":"Chemical Engineering College, Qinghai University, Xining 810016, China"}]},{"given":"Hongzhi","family":"Yang","sequence":"additional","affiliation":[{"name":"Chemical Engineering College, Qinghai University, Xining 810016, China"}]},{"given":"Tian","family":"Zhang","sequence":"additional","affiliation":[{"name":"Qinghai Heavy Industry Vocational School, Xining 810101, China"}]},{"given":"Aixia","family":"Han","sequence":"additional","affiliation":[{"name":"Chemical Engineering College, Qinghai University, Xining 810016, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4299-0992","authenticated-orcid":false,"given":"Ling","family":"Zang","sequence":"additional","affiliation":[{"name":"Department of Materials Science and Engineering, University of Utah, Salt Lake City, UT 84112, USA"}]}],"member":"1968","published-online":{"date-parts":[[2016,12,24]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"37","DOI":"10.1007\/s00775-011-0824-5","article-title":"Thermodynamic study of Cu2+ binding to the DAHK and GHK peptides by isothermal titration calorimetry (ITC) with the weaker competitor glycine","volume":"17","author":"Trapaidze","year":"2012","journal-title":"J. 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