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A Highly Selective “Turn‐On” Fluorescent Sensor for Aluminum Ion Detection in Aqueous Solution Based on Imidazo[2,1‐ b ]thiazole Schiff Base
Author(s) -
Wang Haibin,
Xu Xin,
Yin Jichen,
Zhang Zhifeng,
Xue Lei
Publication year - 2021
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202101562
Subject(s) - fluorescence , turn (biochemistry) , aqueous solution , chemistry , ion , photochemistry , naked eye , selectivity , schiff base , förster resonance energy transfer , detection limit , materials science , stereochemistry , catalysis , organic chemistry , optics , chromatography , biochemistry , physics
Low sensitivity of fluorescent sensors with “turn‐off” response for identifying Al 3+ has limited their wide application in the field of ion sensing. Herein, this paper reports a novel fluorescence sensor ( L ) endowing with “turn‐on” fluorescence response based on imidazo[2,1‐ b ]thiazole for recognizing Al 3+ in aqueous solutions. Results show that the L exhibits high selectivity and sensitivity with “turn‐on” fluorescence response towards Al 3+ , but also has strong anti‐interference to other common ions. In addition, the excellent color change can be distinguished by naked eyes under UV light and the test papers show great potential for detecting Al 3+ in tap water. The supposed sensing mechanism of L to Al 3+ could be attributed to the inhibition of photo‐induced electron transfer (PET) and chelation‐enhanced fluorescence (CHEF). Such a novel design pathway is expected to offer helpful guidance for fabricating various sensors with “turn‐on” fluorescence response.