52915-13-6Relevant articles and documents
Synthesis, and the optical and electrochemical properties of a series of push-pull dyes based on the 4-(9-ethyl-9H-carbazol-3-yl)-4-phenylbuta-1,3-dienyl donor
Pigot, Corentin,Noirbent, Guillaume,Bui, Thanh-Tuan,Péralta, Sébastien,Duval, Sylvain,Gigmes, Didier,Nechab, Malek,Dumur, Frédéric
, p. 5808 - 5821 (2021)
A series of twelve dyes based on the 4-(9-ethyl-9H-carbazol-3-yl)-4-phenylbuta-1,3-dienyl donor were prepared with electron acceptors varying in their structures but also in their electron-withdrawing ability. For specificity, a butadienyl spacer was introduced between the donor and the acceptor to both lower the bandgap and furnish dyes with high molar extinction coefficients. The different dyesA-Nwere characterized using various techniques including UV-visible absorption and fluorescence spectroscopy, and cyclic voltammetry. All dyes showed an intense intramolecular charge transfer band located in the visible range. To further investigate the optical properties of the twelve dyes, their solvatochromism was investigated in twenty-three solvents of different natures, enabling linear correlations to be obtained on different polarity scales such as the Taft, Reichardt and Catalan scales. To support the experimental results, the optical properties were compared with those theoretically determined.
A facile method for the synthesis of acetylcarbazoles and carbazole aldehydes
Nagarajan, Rajagopal,Perumal, Paramasivan T.
, p. 2127 - 2133 (2007/10/03)
Acetylation of 9-alkylcarbazoles with acetic anhydride catalyzed by PPh3. HClO4 was reported to give acetylcarbazoles. Carbazole aldehydes were easily synthesized by the Vilsmeier reaction of 9-alkylcarbazoles under microwave condition in good yields.
