title: Fluorescence sensor for sequential detection of zinc and phosphate ions.
abstract: A new, highly selective turn-on fluorescent chemosensor based on 2-(2'-tosylamidophenyl)thiazole (1) for the detection of zinc and phosphate ions in ethanol was synthesized and characterized. Sensor 1 showed a high selectivity for zinc compared to other cations and sequentially detected hydrogen pyrophosphate and hydrogen phosphate. The fluorescence mechanism can be explained by two different mechanisms: (i) the inhibition of excited-state intramolecular proton transfer (ESIPT) and (ii) chelation-induced enhanced fluorescence by binding with Zn(2+). The sequential detection of phosphate anions was achieved by the quenching and subsequent revival of ESIPT.
authors.affiliation: Department of Applied Chemistry, Kyungpook National University, Daegu 41566, Republic of Korea.
authors.forename: Miran
authors.initials: M
authors.lastname: An
authors.affiliation: Department of Applied Chemistry, Kyungpook National University, Daegu 41566, Republic of Korea.
authors.forename: Bo-Yeon
authors.initials: BY
authors.lastname: Kim
authors.affiliation: Department of Applied Chemistry, Kyungpook National University, Daegu 41566, Republic of Korea.
authors.forename: Hansol
authors.initials: H
authors.lastname: Seo
authors.affiliation: Center of Research Excellence in Nanotechnology, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia. Electronic address: Aasifh@kfupm.edu.sa.
authors.forename: Aasif
authors.initials: A
authors.lastname: Helal
authors.affiliation: Department of Applied Chemistry, Kyungpook National University, Daegu 41566, Republic of Korea. Electronic address: kimhs@knu.ac.kr.
authors.forename: Hong-Seok
authors.initials: HS
authors.lastname: Kim
keywords: Fluorogenic chemosensor; Phosphate; Sequential recognition; Thiazole sulfonamide; Zinc