Planarity of terphenyl rings possessing <i>o</i>-carborane cages: turning on intramolecular-charge-transfer-based emission
作者:Hyunhee So、Jea Ho Kim、Ji Hye Lee、Hyonseok Hwang、Duk Keun An、Kang Mun Lee
DOI:10.1039/c9cc07729d
日期:——
To clarify the relationship between planarity and intramolecular charge transfer (ICT), two o-carboranyl compounds (TCB and FCB) containing different ortho-type terphenyl rings, namely, perfectly distorted or planar phenyl rings, were synthesised and fully characterised. Although the emission spectra of both compounds presented intriguing dual-emission patterns in solution at 298 or 77 K and in the
为了阐明平面度和分子内电荷转移(ICT)之间的关系,合成了两个具有完全异形或平面苯环的邻位三联苯环的邻邻碳烷基化合物(TCB和FCB)。尽管两种化合物的发射光谱在298或77 K的溶液中均处于薄膜状态并呈现出有趣的双发射模式,但扭曲的TCB大多显示出局部激发发射,而平面FCB则显示出与ICT跃迁相对应的强发射。有趣的是,基于三联苯的邻苯二甲醛的发射效率和辐射衰减常数通过增加三联苯基的平面度,逐渐增强了-碳硼烷基化合物。这些结果证明了在邻-甲硼烷取代的化合物中,附加的芳基的平面度与基于ICT的辐射衰减之间存在很强的关系。