Design, Synthesis and Photophysical Properties of Novel Tetrahedral Carbazole-Bridged Silanes with Benzimidazole Groups

Abstract:

Two novel luminescent molecules based on tetrahedral silicon core with the carbazole and benzimidazole groups, bis(6-(1H-benzo[d]imidazol-1-yl)-9-ethyl-9H-carbazol-3-yl)dimethylsilane (1) and bis(6-(1H-benzo[d]imidazol-1-yl)-9-ethyl-9H-carbazol-3-yl)diphenylsilane (2), were designed, synthesized and fully characterized by IR, 1H NMR, 13C NMR and elemental analysis. Thermal results show that these compounds have high thermal stability and glass-transition temperature (Tg). The results based on the photophysical properties and molecular calculations reveal that they are fluorescent with emission in the region of violet to blue and own large HOMO-LUMO band gaps, making them potentials as blue emitters, host materials or charge blocking materials in organic light-emitting diodes (OLEDs) display.

• Periodical: Applied Mechanics and Materials (Volumes 268-270)
• Pages: 23-27
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.268-270.23
• Online since: December 2012
• Authors: Qing Yu Ma, Rui Fang Guan, Guo Zhong Li, Deng Xu Wang
• Keywords: Benzimidazole, Carbazole, Luminescence, OLEDs, Organosilicon Compound

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