{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,10]],"date-time":"2026-01-10T09:53:51Z","timestamp":1768038831999,"version":"3.49.0"},"reference-count":32,"publisher":"MDPI AG","issue":"2","license":[{"start":{"date-parts":[[2019,1,10]],"date-time":"2019-01-10T00:00:00Z","timestamp":1547078400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"The Natural Science Key Fund for Colleges and Universities of Jiangsu Province","award":["15KJB530006"],"award-info":[{"award-number":["15KJB530006"]}]},{"name":"the Specialized Research Fund for the Doctoral Program of Higher Education","award":["20123221110012"],"award-info":[{"award-number":["20123221110012"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Silver is a common catalyst in industrial production, and the frequent use of Ag+ can cause water pollution. Thus, the detection of Ag+ in the environment is necessary to determine the level of pollution from silver. In this work, we designed a new, highly selective near-infrared (NIR) fluorescent probe QCy to detect Ag+. The probe exhibits \u201cturn-off\u201d fluorescence quenching responses at 760 nm towards Ag+ over other relevant cations, with outstanding sensitivity and a low detection limit (0.03 \u00b5M), which is considerably lower than the standard of the World Health Organization (WHO) for drinking water (0.9 \u00b5M). Meanwhile, QCy showed a very good linearity at a low concentration of Ag+ with a \u2018naked eye\u2019 visible color change of solution from blue to red. The probe has been applied successfully for the detection of Ag+ in real water samples.<\/jats:p>","DOI":"10.3390\/s19020247","type":"journal-article","created":{"date-parts":[[2019,1,11]],"date-time":"2019-01-11T04:10:16Z","timestamp":1547179816000},"page":"247","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":38,"title":["A Sensitive Near-Infrared Fluorescent Probe for Detecting Heavy Metal Ag+ in Water Samples"],"prefix":"10.3390","volume":"19","author":[{"given":"Yawen","family":"Zhang","sequence":"first","affiliation":[{"name":"College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 210000, China"}]},{"given":"Aiying","family":"Ye","sequence":"additional","affiliation":[{"name":"College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 210000, China"},{"name":"Changzhou Vocational Institute of Engineering, Changzhou 213100, China"}]},{"given":"Yuewei","family":"Yao","sequence":"additional","affiliation":[{"name":"College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 210000, China"}]},{"given":"Cheng","family":"Yao","sequence":"additional","affiliation":[{"name":"College of Chemistry and Molecular Engineering, Nanjing Tech University, Nanjing 210000, China"}]}],"member":"1968","published-online":{"date-parts":[[2019,1,10]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"191","DOI":"10.1016\/j.talanta.2016.03.029","article-title":"Novel magnetite nanoparticle based on BODIPY as fluorescent hybrid material for Ag (I) detection in aqueous medium","volume":"153","author":"Kursunlu","year":"2016","journal-title":"Talanta"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"3284","DOI":"10.1016\/j.snb.2017.09.155","article-title":"One pot solid-state synthesis of highly fluorescent N and S co-doped carbon dots and its use as fluorescent probe for Ag+ detection in aqueous solution","volume":"255","author":"Dang","year":"2018","journal-title":"Sens. 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