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Microwave assisted synthesis, photophysical and redox properties of (phenothiazinyl)vinyl-pyridinium dyes

Domenii publicaţii > Chimie + Tipuri publicaţii > Articol în revistã ştiinţificã

Autori: Luiza Gaina, Ioana Torje, Emese Gal, Alexandru Lupan, Cristina Bischin, Radu Silaghi-Dumitrescu, Grigore Damian, Peter Lönnecke, Castelia Cristea, Luminita Silaghi-Dumitrescu

Editorial: Elsevier, Dyes and Pigments, 102, p.315-325, 2014.

Rezumat:

New cationic cyanine dyes, containing electron donor 10-alkyl-phenothiazine and electron acceptor pyridinium units connected through a vinylene bridge were conveniently synthesized by microwaves assisted condensation of phenothiazine carbaldehyde with methylpyridinium salts in dry media. Their photophysical properties revealing strong absorption bands in 440-470 nm region (É ≈ 104-105) and large Stokes shifts of fluorescence emission (610-750 nm) in solid state were supported by computational data using TDDFT level of theory. The redox behavior of PVP was studied by means of electrochemical and biocatalytical oxidation processes

Cuvinte cheie: Alkyl-pyridinium cation; DFT; Microwaves assisted organic synthesis; Phenothiazine; Prooxidant reactivity; UV-Vis absorption