Efficient non-doped blue emitting devices based on bis(phenanthrimidazolyl)biphenyl derivatives
作者:Jayaraman Jayabharathi、Annadurai Prabhakaran、Venugopal Thanikachalam、Palanivel Jeeva
DOI:10.1039/c6nj02431a
日期:——
of bis(phenanthrimidazolyl)biphenyl derivatives, 4,4′-bis(1-methylnaphthyl-1H-phenanthro[9,10-d]imidazol-2-yl)biphenyl (4,4′-BNPIB), 3,4′-bis(1-methylnaphthyl-1H-phenanthro[9,10-d]imidazole-2-yl)biphenyl (3,4′-BNPIB) and 3,3′-bis(1-methylnaphthyl-1H-phenanthro[9,10-d]-imidazol-2-yl)-biphenyl (3,3′-BNPIB) have been synthesised by tuning the coupling position on the biphenyl from the para- to meta-position
双(菲并咪唑基)联苯衍生物,4,4'-双(1-甲基萘基-1 H-菲并[9,10 - d ]咪唑-2-基)联苯(4,4'-BNPIB)的高效发蓝光异构体,3,4'-双(1-甲基萘-1 H-菲基[9,10 - d ]咪唑-2-基)联苯(3,4'-BNPIB)和3,3'-双(1-甲基萘- 1 H-菲并[9,10 - d ]-咪唑-2-基)-联苯(3,3'-BNPIB)通过调节联苯上从对位到间位的偶联位置而合成。这些化合物在152-198°C的高玻璃化转变温度下表现出出色的热性能,并且在约200℃的溶液中发出强烈的蓝光。396 nm。由于菲啶咪唑单元中C-2位的共轭程度发生变化,因此3,4'-BNPIB(413/430 nm)和3,3'-BNPIB(396/426 nm)的发射是蓝色的。与溶液和薄膜中的4,4'-BNPIB(422/450 nm)相比,均发生了位移。基于这些材料制造的非掺杂器件在431