Hydroalcoholic mixtures: the effect of the solvent on the electronic spectrum of the indicator methyl orange

In this study, the behavior of the electronic spectrum of the indicator methyl orange in water–methanol, water–ethanol, water– n -propanol, water– iso -propanol and water– t -butanol mixtures was investigated. The spectroscopic parameters were calculated for the binary mixtures with changes in the m...

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Bibliographic Details
Published in:Monatshefte für Chemie 2022, Vol.153 (1), p.61-67
Main Authors: Sant’Ana, Ana Caroline, Dangui, Anayana Zago, Reis, Aline Vitória, Nicolini, Keller Paulo, Nicolini, Jaqueline
Format: Article
Language:English
Subjects:
Analytical Chemistry
Binary mixtures
Butanol
Chemical properties
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Colorimetry
Dyes
Ethanol
Inorganic Chemistry
Organic Chemistry
Original Paper
Physical Chemistry
Protons
Solvation
Theoretical and Computational Chemistry
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Summary:In this study, the behavior of the electronic spectrum of the indicator methyl orange in water–methanol, water–ethanol, water– n -propanol, water– iso -propanol and water– t -butanol mixtures was investigated. The spectroscopic parameters were calculated for the binary mixtures with changes in the mole fraction of water in the mixture. Interesting changes in the profile of the indicator methyl orange were observed in these mixtures, showing synergistic and preferential solvation effects. The aim of this study was to evaluate the physical–chemical properties of methyl orange in binary mixtures, considering the use of this compound as a perichromic indicator. Due to changes in the electronic spectrum in hydroalcoholic binary mixtures, methyl orange can act as a colorimetric sensor for the detection of short-chain alcohols in the presence of water. Graphical abstract
ISSN:0026-9247
1434-4475
DOI:10.1007/s00706-021-02875-8