Charge-Transfer Emission Involving Three-Coordinate Organoboron: V-Shape versus U-Shape and Impact of the Spacer on Dual Emission and Fluorescent Sensing
作者:Dong-Ren Bai、Xiang-Yang Liu、Suning Wang
DOI:10.1002/chem.200700364
日期:2007.7.6
through-space donor-acceptor charge transfer and pi-pi* transitions coexist in the V-shaped molecules 1-3, while charge transfer emission is dominant in the U-shaped molecules. It is found that depending on the geometry of the linker and the BN separation distance, the compound either displays dual emission bands simultaneously or single emission band. In addition, the dual emission pathways in these molecules
新型V形双功能有机硅化合物,其包含一个电子受体B(Mes)2和一个电子供体N(1-naph)Ph,其分子式为Ph2Si p-C6H4B(Mes)2} p-C6H4N( 1-naph)ph)}(1),Ph2Si p-C6H4(Mes)2} p-联苯-N(1-naph)ph}(2)和Si p-C6H4B(Mes)2} 2 p-C6H4N(1-naph)ph)} 2(3)已被合成为模型化合物,用于研究涉及三芳基硼和三芳基氨基中心的穿越空间的电荷转移发射。将新型双功能有机硅化合物的光物理性质与两个U形化合物sBN和BN进行了比较,其中硼受体和氨基供体基团通过刚性的1,10-萘基连接在一起。我们的调查结果确定了双重排放途径,也就是说,在V形分子1-3中共存有通过空间的供体-受体电荷转移和pi-pi *跃迁,而在U形分子中则主要存在电荷转移发射。已经发现,取决于接头的几何形状和BN分离距离