BIBLIOS

Document type
Journal articles

Document subtype
Full paper

Title
Study of the Ternary Mixture of Methanol/Formamide/Acetonitrile via Solvatochromic Probes

Participants in the publication
Nelson Nunes (Author)
Ruben Elvas-Leitão (Author)
Filomena Martins (Author)
Dep. Química e Bioquímica
CQE

Summary
Following previous studies, the ternary mixture of methanol/formamide/acetonitrile (MeOH/Formamide/MeCN) was studied using the UV-Vis absorption spectra at 298.15 K with a set of five probes, 4-nitroaniline, 4-nitroanisole, 4-nitrophenol, N,N-dimethyl-4-nitroaniline and 2,6-diphenyl-4-(2,4,6-triphenyl-1-pyridinio)phenolate (Reichardt betaine dye), for a total of 22 mole ternary fractions. In addition, nine mole fractions of the underling binary mixtures, MeOH/Formamide and Formamide/MeCN were also tested. Spectroscopic results were used to model the preferential solvation order for each probe in the mixtures. The Kamlet–Taft solvatochromic solvent parameters, α, β, and π*, were also computed through the use of the solvatochromic shifts of the five probe indicators. Moreover, discrepancies in the spectroscopic behavior of 4-nitrophenol in formamide-rich mixtures were observed and analyzed.


Institution
FACULDADE DE CIÊNCIAS DA UNIVERSIDADE DE LISBOA

Where published
Molecules

Publication Identifiers
ISSN - 1420-3049

Publisher
MDPI AG



Document Identifiers
DOI - https://doi.org/10.3390/molecules29010246
URL - http://dx.doi.org/10.3390/molecules29010246

Keywords
ternary mixture; methanol; formamide; acetonitrile; solvatochromic probes; Kamlet–Taft parameters; solvation