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研究了不同过渡金属离子对以二甲氨基查尔酮修饰的β-环糊精在不同溶剂中的荧光猝灭问题.发现经过修饰的查尔酮在水溶液中对CU2+具有特征的识别功能.其猝灭速率常数比其他研究的金属离子大一个数量级以上.然而当该修饰环糊精处于非水溶剂如DMF中时Cu2+离子特征识别功能不再存在,而具有平面四方电子构型的Ni2+则表现出最强的络合功能,这可能与化合物联结链中存在四个用亚乙基相联的络合位点易于生成平面四方结构有关.表明主/客体化合物在结构空间上的互补性,在它们的络合过程中具有重要意义.
The fluorescence quenching of β-cyclodextrin modified with dimethylamino-chalcone in different solvents was studied by different transition metal ions, and the modified chalcone was found to have the characteristic recognition function in aqueous solution. The quenching rate constant is more than one order of magnitude larger than the other metal ions studied, whereas the feature recognition of Cu2 + ions no longer exists when the modified cyclodextrin is in a non-aqueous solvent such as DMF, whereas Ni2 + with a planar tetragonal electron configuration shows The strongest complexing function, which may be related to the presence of four ethylene-linked complex sites in the compound chain, which is easy to generate a planar tetragonal structure, indicating that the host / guest compounds are structurally complementary in space Their complexation process is of great significance.