Benzothiazole integrated into a cryptand for ESIPT-based selective chemosensor for Zn2+ ions

A novel benzothiazole-based cryptand was designed and synthesized, and it exhibited high fluorescence intensity in the presence of Zn2+ ions based on the metal chelation inhibition of the excited state intramolecular proton transfer (ESIPT) process. The structure of the cryptand was confirmed by NMR...

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Bibliographic Details
Published in:Dalton transactions : an international journal of inorganic chemistry 2019-06, Vol.48 (22), p.7801-7808
Main Authors: Gupta, Mayank, Sahana, Sunanda, Sharma, Vivekanand, Bharadwaj, Parimal K
Format: Article
Language:English
Subjects:
Chelation
Chemical sensors
Chemoreceptors
Crystallography
Fluorescence
NMR
Nuclear magnetic resonance
Selectivity
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Summary:A novel benzothiazole-based cryptand was designed and synthesized, and it exhibited high fluorescence intensity in the presence of Zn2+ ions based on the metal chelation inhibition of the excited state intramolecular proton transfer (ESIPT) process. The structure of the cryptand was confirmed by NMR, mass spectroscopy and X-ray crystallography. Importantly, this probe showed high selectivity over other biologically relevant metal ions and anions and a detection limit of 0.20 μM, which is acceptable within the EPA (US) limit.
ISSN:1477-9226
1477-9234
DOI:10.1039/c9dt00548j