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

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• 作者：Luiza G膬in膬 ; Ioana Torje ; Emese Gal ; Alex ; ru Lupan ; Cristina Bischin ; Radu Silaghi-Dumitrescu ; Grigore Damian ; Peter L枚nnecke ; Castelia Cristea ; Lumini牛a Silaghi-Dumitrescu
• 关键词：Phenothiazine ; Alkyl-pyridinium cation ; Microwaves assisted organic synthesis ; UV&ndash ; Vis absorption ; DFT ; Prooxidant reactivity
• 刊名：Dyes and Pigments
• 出版年：March, 2014
• 年：2014
• 卷：102
• 期：Complete
• 页码：315-325
• 全文大小：1540 K

文摘

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聽nm region (蓻聽鈮埪?0⁴-10⁵) and large Stokes shifts of fluorescence emission (610-750聽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.