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Highly Selective and Sensitive 2‐(2′‐Hydroxyphenyl)benzothiazole‐Based Turn‐On Fluorescent Probes for Detecting and Imaging Bisulfite in Living Cells

Highly Selective and Sensitive 2‐(2′‐Hydroxyphenyl)benzothiazole‐Based Turn‐On Fluorescent Probes... Bisulfite (HSO3−) is one of the main forms of sulfur dioxide in physiological systems. Two 2‐(2′‐hydroxyphenyl)benzothiazole‐derived fluorescent probes bearing a nitroolefin moiety were designed based on the intramolecular charge transfer (ICT) effect and excited‐state intramolecular proton transfer (ESIPT) mechanism to afford a fluorescent turn‐on response specifically in the present of HSO3− ions. Owing to the remarkable ICT effect from hydroxy group to the nitro group, the probes exhibit extremely weak fluorescence. Upon the conjugate addition reaction with HSO3− at the nitroolefin moiety of the probes, the ICT character is weakened and the absorption spectra of the products are blueshifted. A pronounced fluorescence enhancement based on ESIPT was also observed. The two probes exhibited good sensitivity, high selectivity and an excellent anti‐interference properties of their large Stokes shifts, indicating that the probes are highly suitable for biological systems. Furthermore, they were successfully applied to the imaging of HSO3− in living cells. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Asian Journal of Organic Chemistry Wiley

Highly Selective and Sensitive 2‐(2′‐Hydroxyphenyl)benzothiazole‐Based Turn‐On Fluorescent Probes for Detecting and Imaging Bisulfite in Living Cells

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References (30)

Publisher
Wiley
Copyright
© 2018 Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim
ISSN
2193-5807
eISSN
2193-5815
DOI
10.1002/ajoc.201700626
Publisher site
See Article on Publisher Site

Abstract

Bisulfite (HSO3−) is one of the main forms of sulfur dioxide in physiological systems. Two 2‐(2′‐hydroxyphenyl)benzothiazole‐derived fluorescent probes bearing a nitroolefin moiety were designed based on the intramolecular charge transfer (ICT) effect and excited‐state intramolecular proton transfer (ESIPT) mechanism to afford a fluorescent turn‐on response specifically in the present of HSO3− ions. Owing to the remarkable ICT effect from hydroxy group to the nitro group, the probes exhibit extremely weak fluorescence. Upon the conjugate addition reaction with HSO3− at the nitroolefin moiety of the probes, the ICT character is weakened and the absorption spectra of the products are blueshifted. A pronounced fluorescence enhancement based on ESIPT was also observed. The two probes exhibited good sensitivity, high selectivity and an excellent anti‐interference properties of their large Stokes shifts, indicating that the probes are highly suitable for biological systems. Furthermore, they were successfully applied to the imaging of HSO3− in living cells.

Journal

Asian Journal of Organic ChemistryWiley

Published: Mar 1, 2018

Keywords: ; ; ; ;

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