The -OH group protected 2-(hydroxyphenyl) benzothiazole (HBT) based ratiometric chemodosimeters have previously been reported to undergo regeneration of excited state intramolecular proton transfer (ESIPT) process upon deprotection. In the current work it is demonstrated for the first time that generation of anion of HBT leads to the optical changes in these types of chemodosimeters rather than regeneration of HBT by using a Hydrazine specific chemodosimeter based on substituted HBT. © 2019

NIKHIL GUCHHAIT

Chemistry

A BHATTACHARYYA

S C MAKHAL

University of Calcutta (informally known as Calcutta University or CU) is a collegiate public state university located in Kolkata, West Bengal, India.&nbsp;Within India it is recognized as a &quot;Five-Star University&quot; and accredited &quot;A&quot; Grade by National Assessment and Accreditation Council.

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The University of Calcutta has secured the Fifth position among the Universities of India in the prestigious &quot;Indian University Ranking 2019&quot; list, released by the NIRF of the Ministry of Human Resource Development, Government of India.

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It was established on 24 January 1857, and was one of the first institutions in Asia to be established as a multidisciplinary and Western-style university. Its alumni and faculty include several heads of state, heads of government, social reformers, prominent artists, only academy award winner and Dirac medal winner in India, many Fellows of the Royal Society and five Nobel laureates as of 2019 which is highest in South Asia.

University Of Calcutta

Chemical Physics

Benzthiazole-based ratiometric fluorescent probes acetylphenylbenzthiazole (APBT) and acetylnaphthylbenzthiazole (ANBT), were synthesized and characterized. These two excited-state intramolecular proton transfer (ESIPT)-based first ratiometric fluorescent probes were shown to be selective and sensitive for perborate (BO3 –) among the 15 anions studied in HEPES buffer medium by fluorescence, absorption, and visual emission color change. Upon treatment with perborate in aqueous HEPES buffer solution, the acetyl protective group of probes APBT and ANBT was removed readily and ESIPT of the probes was switched on, which resulted in remarkable photo-physical changes. Time dependent- density functional theory (TD-DFT) calculations were performed in order to demonstrate the electronic properties of APBT and ANBT and their anion. An easy-to-prepare test paper, obtained by dipping the paper into the solution of APBT, was able to detect BO3 – in practical samples. Moreover, the utility of the APBT and ANBT probes in perborate recognition has also been demonstrated in Vero cells using Confocal imaging. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

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Journal	Data powered by TypesetChemical Physics
Publisher	Data powered by TypesetElsevier B.V.
ISSN	0301-0104
Open Access	No