Organoboron Compounds with an 8-Hydroxyquinolato Chelate and Its Derivatives: Substituent Effects on Structures and Luminescence
作者:Yi Cui、Qin-De Liu、Dong-Ren Bai、Wen-Li Jia、Ye Tao、Suning Wang
DOI:10.1021/ic0489746
日期:2005.2.1
characterized. These compounds are four-coordinate boron chelated by either 8-hydroxyquinolato (q) or functionalized 8-hydroxylquinolato ligands, including BPh2(5-(1-naphthyl)-q) (1), BPh2(5-(2-benzothienyl)-q) (2), B(2-benzothienyl)2q (3), and B(2-benzothienyl)2(2-Me-q) (4). All four compounds have a tetrahedral geometry as established by X-ray diffraction analyses. In solution, compounds 1-4 have an emission
已经合成了四种新的发光有机硼配合物并对其进行了充分表征。这些化合物是被8-羟基喹诺酮(q)或功能化的8-羟基喹诺酮配体螯合的四配位硼,包括BPh2(5-(1-萘基)-q)(1),BPh2(5-(2-苯并噻吩基)- q)(2),B(2-苯并噻吩基)2q(3)和B(2-苯并噻吩基)2(2-Me-q)(4)。通过X射线衍射分析确定,所有四种化合物均具有四面体几何形状。在溶液中,化合物1-4在室温下的最大发射分别在534、565、501和496 nm。由于在晶格中缺乏明显的分子间相互作用,它们在固态中发射相似的颜色而没有发射带的红移。已经观察到8-羟基喹诺酮配体的C5或C2位上的取代基对硼配合物的发射能和发射量子效率具有显着影响。分子轨道计算(Gaussian 98)显示1和2的电子跃迁是以功能化的8-羟基喹啉基为中心的pi-pi *跃迁,而3和4的电子跃迁是由2-苯并噻吩基配体进行的配体电荷转移羟基喹啉基环上