Synthesis and Photophysical Properties of Bipolar Compound: Triphenylamine/Diazafluorene-Carbazole.

Carbazole and triphenylamine, are two well-known hole transporting units that are attached to electron transporting unit 4,5-diazafluorene in a fascinating way to bring out non-planar configuration of a molecule. The synthesized compound exhibits good thermal stability (T > 515 °C) and high glass transition temperature (T, 191 °C). Optical bandgap (E) obtained from solid state absorption spectra was calculated to be 2.

Synthesis of Ag-ZnO nanoparticles for enhanced photocatalytic degradation of acid red 88 in aqueous environment.

Photocatalytic activities were found to be enhanced when noble metals were deposited on the semiconductors because the metal nanoparticles store electrons within them and in turn are recognized to act as a sink for photoinduced charge carriers, promoting interfacial charge transfer processes. This motivates us to modify the bare ZnO powder by doping with nano sized silver to yield metal-semiconductor nanocomposites by simple material syntheses route to suppress detrimental recombination of the photogenerated charge carriers. The materials were characterized by different analytical techniques and it is potentially utilized for the photocatalytic degradation of an azo dye (Acid Red 88; AR88) in the visible region (lambda>400 nm).