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论文类型：期刊论文

发表时间：2012-10-21

发表刊物：RSC ADVANCES

收录刊物：SCIE、EI、Scopus

卷号：2

期号：25

页面范围：9488-9494

ISSN号：2046-2069

摘要：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.