Charge-Transfer Emission in Organoboron-Based Biphenyls: Effect of Substitution Position and Conformation
作者:Chen Wang、Qing-Wen Xu、Wei-Ning Zhang、Qian Peng、Cui-Hua Zhao
DOI:10.1021/acs.joc.5b02038
日期:2015.11.6
NMe2, were fully characterized to explore the effect of structural modification on the intramolecular charge-transfer emissions. In addition to significant effect of substitution position on photophysical properties, remarkable influence of conformation was also observed for o,o′-substituted compounds. The emission is substantially blue-shifted as conformation changes from the location of NMe2 and BMes2
一系列基于有机硼-联苯Ö,ö ' - NME 2,ø,p ' - NME 2,p,p ' - NME 2,其含有给电子NME 2和电子接受BMES 2基团在Ô,ø ' - ,ö,p ' - ,p,p '联苯骨架,分别的位上,以及ø,ö ' - NBN 2,其包含更笨重NBN2而不是NMe 2被充分表征,以探索结构修饰对分子内电荷转移发射的影响。除了对光物理性质取代位置显著效果,构象的显着的影响为,也观察到ø,ö '取代的化合物。当构象从联苯轴同一侧的NMe 2和BMes 2的位置以接近B···N的距离发生构象变化时,发射基本上发生蓝移,从而在o,o ′中直接发生B···N电子相互作用- NME 2,到NBN的位置2和BMES 2在两个相对侧ø,ö ' - NBN 2。和ø,ö ' - NME 2所表现出最长发射波长,但是最短吸收波长,并且在溶液和固体状态这四个基于有机硼-联苯中从而最大斯托克斯位移。理论计算表明的独特结构ø,ö