β-环糊精和1,2-二溴乙烷对喹啉或异喹啉的酸碱平衡及室温发光的影响

Effect of β-cyclodextrin and 1,2-dibromoethane on room temperature luminescence and dissociation equilibrium of quinoline and isoquinoline

通过对喹啉室温发光的研究认为,在喹啉水溶液中引入β-环糊精和1,2-二溴乙烷,将使喹啉的酸碱平衡显著地向喹啉分子方向移动,而喹啉仍能质子化,并导致 I_F 和 I_P 与 pH 的关系曲线的突跃范围向低 pH 方向移动。异喹啉也有类似的情况。

The room temperature luminescence beha-viors of quinoline and isoquinoline in aqueoussolution,in β-cyclodextrin(β-CD)solution,and in β-CD-DBE(1,2-dibromoethane)mixedsolution have been studied.The acid-baseequilibrium of quinoline was shifted signifi-cantly to the direction of fo ming molecules.But in acidic solution,quinoline can still beprotonized,and the I_F-pH and I_p-pH rela-tion curves shift to lower pH range.Isoquin-oline has a similar behavior.