Triazole derived azo-azomethine dye as a new colorimetric anion chemosensor.
Spectrochim Acta A Mol Biomol Spectrosc
; 226: 117566, 2020 Feb 05.
Article
em En
| MEDLINE
| ID: mdl-31629979
ABSTRACT
In the pursue of developing anion sensors, an efficient triazole derived azo-azomethine dye chemosensor (S) that differentially senses Fâ¾ and AcOâ¾ ions has been reported. The ions recognition ability of S was investigated by colorimetric and UV-visible spectroscopic methods. Interestingly, this chemosensor molecule is virtually inactive in presence of other anions such as Clâ¾, Brâ¾ and Iâ¾ and HSO4â¾. We have further presented a ratiometric approach to differentiate Fâ¾ and AcOâ¾ ions. The reversibility of Fâ¾ ion binding with S was established by the addition of Ca(NO3)2 to the fluoride bound S, which led to the regeneration of S. The quantum chemical calculation of energies of unbound and bound S has been employed using Density Functional Theory (DFT) to understand the interaction between chemosensor and anions. Evidence in support of fluoride-induced deprotonation of a O-H bond during the detection of Fâ» ion has been demonstrated by employing 1H NMR titration experiments.
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1
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Spectrochim Acta A Mol Biomol Spectrosc
Assunto da revista:
BIOLOGIA MOLECULAR
Ano de publicação:
2020
Tipo de documento:
Article
País de afiliação:
Índia