Reaction of AlEt3 with 2-methyl-8-quinolinol gave ethylbis(2-methyl-8-quinolinolato)aluminum complex [Al(Et)(q′)2] 1. The complex 1 provided photoluminescent Al complexes by reactions with phenols, carboxylic acid, and H2O. The α-CH2 hydrogens in the Et group of 1 was diastereotropic as revealed by 1H NMR spectroscopy because of the presence of a chiral center at Al. The chirality at Al was dynamically
AlEt 3与2-甲基-
8-喹啉醇反应,得到乙基双(2-甲基-
8-喹啉甲酸酯)铝络合物[Al(Et)(q')2 ] 1。复1个提供的光致发光的Al配合物通过与
酚,
羧酸,和H反应2 O.的α-CH 2个氢的基团的Et的在1所揭示的是diastereotropic 1个因为手性中心的在存在H NMR光谱铝 如温度依赖性1所示,Al的手性在CDCl 2 CDCl 2和
DMSO- d 6的升高温度下会动态丧失。1 H NMR光谱。这种动态或fluxional行为1是由2-甲基-
8-羟基喹啉配体的旋转进行说明。动态过程的动力学参数在CDCl 2 CDCl 2中的ΔH ‡ = 135 kJ mol -1和ΔS ‡ = 159 J K -1 mol -1以及在ΔH ‡ = 124 kJ mol -1和ΔS的情况下估算‡ = 151 J K -1 mol -1(以
DMSO- d 6表示)分别在35