Open AccessNew Compounds Measured by Fluorescence Spectroscopy. Amino-Fluorene-Thiophene Derivatives to Be Proposed as Polarity Indicators.
Author(s) -
J.C. Bernède,
Ortega Eduardo,
Andrés M. R. Ramírez,
Linda Cattin,
Guy Louarn,
Diaz Fernando,
Del Valle Maria Angelica
Publication year - 2018
Publication title -
journal of advances in chemistry
Language(s) - English
Resource type - Journals
ISSN - 2321-807X
DOI - 10.24297/jac.v15i1.7339
Subject(s) - solvatochromism , hypsochromic shift , bathochromic shift , photochemistry , thiophene , chemistry , polarity (international relations) , amine gas treating , solvent , wavelength , fluorene , fluorescence , spectroscopy , analytical chemistry (journal) , materials science , organic chemistry , polymer , optics , biochemistry , physics , optoelectronics , quantum mechanics , cell
The solvatochromic effect is high in conjugate compounds and easy to observe by the colour change emitted when the solutions are exposed to UV light. It was found in a series of aminofluorene thiophene derivatives, previously synthesized, that irradiating at different wavelengths, the same pattern is obtained, i.e. a dual behaviour in the solvatochromism of the studied compounds. For each one, a bathochromic and hypsochromic effect exists, in polar and nonpolar solvents, respectively. Wavelength vs. polarity index plots clearly showed the abovementioned dual behaviour as well as the improved linearity in its plots. Amidst the wavelengths at which each compound is excited in each solvent, 280 nm was selected as the fixed wavelength for the measurements; (E)-9,9-diethyl-N-hexyl-N-phenyl-7-(2-(thiofen-2-yl)vinyl)-9H-fluoren-2-amine (M6-6) exhibits better linearity as compared to the other studied compounds, being the best to be proposed as polarity sensor or indicator.