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Indexed by:期刊论文

Date of Publication:2012-10-21

Journal:RSC ADVANCES

Included Journals:SCIE、EI、Scopus

Volume:2

Issue:25

Page Number:9488-9494

ISSN No.:2046-2069

Abstract:Three generations of novel dendrimers (G1, G2 and G3) with a tetraphenylsilane core and 9-phenylcarbazole-based dendrons have been successfully synthesized. These dendrimers possess excellent thermal stability with 5% weight-loss temperatures in the range of 574 to 622 degrees C. Compared to the lower generation of dendrimer, G3 exhibits a high glass transition at 271 degrees C, indicating that the high content of 9-phenylcarbazole results in a dendrimer with significantly enhanced rigidity. The contorted dendrons effectively inhibit the aggregation of conjugative chromophore groups, leading to a fluorescence quantum yield of up to 99.1%. Moreover, all the dendrimers have high energy band gaps, a characteristic which is especially desirable for host materials in the fabrication of organic light-emitting devices.