期刊
TETRAHEDRON LETTERS
卷 49, 期 20, 页码 3300-3303出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2008.03.071
关键词
cyanation; palladium; phenothiazine; microwave chemistry; cyclovoltamrnetry; fluorescence
(Oligo)phenothiazinyl nitriles were synthesized in good to very good yields from bromo (oligo)phenothiazines via the Beller cyanation protocol either under conductive or under dielectric heating using NMP as a solvent. Their electronic properties were determined by absorption and emission spectroscopy and cyclic voltammetry. Cyano(oligo)phenothiazines display large Stokes-shifts (58008300 cm(-1)) and substantial quantum yields (11-27%). Their reversible oxidation potentials are considerably shifted anodically due to the electron-withdrawing character of the cyano group. (c) 2008 Elsevier Ltd. All rights reserved.
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