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Title: Selective detection of fluoride and hydrogen sulfate anions by pyrimidine-based fluorescence chemosensor
Authors: Thakur, Soumya R
Behura, R
Behera, S
Sayala, Rajesh B
Barick, Arun K
Ramakrishna, D S
Jali, Bigyan R
Keywords: Fluorescence sensor;Pyrimidine-based probe;Binding constant;Colour change;Photo-induced electron transfer
Issue Date: Dec-2020
Publisher: NISCAIR-CSIR, India
Abstract: The binding and sensing abilities of pyrimidine based fluorescence chemosensor L towards different anions such as F-, Cl-, Br-, I-, NO3-, ClO4-, H2PO4- and HSO4- have been examined by fluorescence spectroscopy in DMSO-H2O (7: 3, v/v). Upon successive addition of various anions to DMSO-H2O solutions of L; quenching in emission fluorescence is observed at 480 nm. Analysis of fluorescence emission changes suggested the formation of 1:1 complex of L with the anions. From the fluorescence binding constant data, it is found that L form strong complexes with F- and HSO4- ions through H-bonding interactions. The selective response of F- over other halides and HSO4- amongst other oxo-anions towards L may be explained on the basis of photo-induced electron transfer process.
Page(s): 1809-1813
ISSN: 0975-0975(Online); 0376-4710(Print)
Appears in Collections:IJC-A Vol.59A(12) [December 2020]

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