A new class of blue-emitting materials for LED applications:: Triarylamine N-functionalised 2,7-linked carbazole polymers

Attachment of triarylamino-functional groups at the 9-position of 2,7-linked carbazole polymers results in blue-emitting materials with two independent redox processes that were attributed to the triarylamino groups and the polymer backbone, respectively. This new class of blue-emitting conjugated polymers was prepared via a Suzuki cross-coupling reaction and showed low turn-on voltages in electroluminescent devices as a result of their low ionisation potentials. The photophysical, electrochemical and electroluminescent properties of these materials are discussed. [GRAPHICS] omposites. Microwave irradiation proved to be an effective and efficient method for the preparation of PCL/clay nanocomposites. [GRAPHICS] [GRAPHICS] in situ reduction, a large number of metal-based functional materials can be prepared. PVP is alkaline, and thus capable of catalyzing the sol-gel process to generate an inorganic shell. Furthermore, pre-formed nanoparticles can also be absorbed by the shell through specific interactions. The PS core is not infiltrative during synthesis, and hollow rings can be derived after the polymer templates are removed. [GRAPHICS] b