Synthesis, and the optical and electrochemical properties of a series of push–pull dyes based on the 4-(9-ethyl-9<i>H</i>-carbazol-3-yl)-4-phenylbuta-1,3-dienyl donor
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 opticalproperties of the twelve dyes, their solvatochromism was investigated in twenty-three solvents of different natures, enabling linear correlations to be obtained
A Facile Method for the Synthesis of Acetylcarbazoles and Carbazole Aldehydes
作者:Rajagopal Nagarajan、Paramasivan T. Perumal
DOI:10.1081/scc-120038488
日期:2004.12.31
Abstract Acetylation of 9‐alkylcarbazoles with acetic anhydride catalyzed by PPh3 · HClO4 was reported to give acetylcarbazoles. Carbazolealdehydes were easily synthesized by the Vilsmeier reaction of 9‐alkylcarbazoles under microwave condition in good yields.
Verbindungen der allgemeinen Formel
worin die Symbole die in der Beschreibung genannte Bedeutung haben, eignen sich hervorragend als Farbbildner in Aufzeichnungsmaterialien auf der Basis saurer Entwickler. Man erhält intensive blaue, grünblaue, grüne, violette oder rote Farbtöne, die ausgezeichnet sublimations-und lichtecht sind.