Abstract
This work describes the photophysical properties of new salicylidene derivatives which undergoes excited state intramolecular proton transfer (ESIPT) and the role of solvent polarity and specific interactions with the dyes. These observations were obtained by steady-state and time-resolved electronic absorption and fluorescence techniques. Salicylidene derivatives were synthetized by Schiff’s condensation using an acid catalyst and they were characterized successfully by 1H and 13C NMR, FT-IR, HRTOF-MS and single-crystal X-ray diffraction and they photophysical properties were studied by the addition of a bromide moiety of the aromatic amine ring.
Highlights
excited state intramolecular proton transfer (ESIPT) is a phenomenon that occurs in the excited-state with an ultrafast time-scale, where the formed species must be in balance or not, exhibiting a radiative decay along the visible spectrum, caning it generates white-light for lightning applications. 1,2 these molecules should be present an acid hydrogen that is sensitive by the media polarity and refractive index
This work describes the photophysical properties of new salicylidene derivatives which undergoes excited state intramolecular proton transfer (ESIPT) and the role of solvent polarity and specific interactions with the dyes
Salicylidene derivatives were synthetized by Schiff’s condensation using an acid catalyst and they were characterized successfully by 1H and 13C NMR, FT-IR, HRTOF-MS and single-crystal X-ray diffraction and they photophysical properties were studied by the addition of a bromide moiety of the aromatic amine ring
Summary
ESIPT is a phenomenon that occurs in the excited-state with an ultrafast time-scale, where the formed species (normal* - N* and tautomer* - T*) must be in balance or not, exhibiting a radiative decay along the visible spectrum, caning it generates white-light for lightning applications. 1,2 these molecules should be present an acid hydrogen that is sensitive by the media polarity and refractive index. This work describes the photophysical properties of new salicylidene derivatives which undergoes excited state intramolecular proton transfer (ESIPT) and the role of solvent polarity and specific interactions with the dyes. These observations were obtained by steady-state and time-resolved electronic absorption and fluorescence techniques.
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