二甲氨基查耳酮修饰的β-环糊精在不同溶剂中的光物理行为  

Photo-physical Behavior of Modified β-Cyclodextrin by Dimethylamino Chalcone in Different Solvents

作　　者：王辉[1] 房喻[1] 梅明华[2] 解宏智[2] 张晓宏[2] 吴世康[2] 

机构地区：[1]陕西师范大学化学系,西安710062 [2]中国科学院理化技术研究所,北京100101

出　　处：《物理化学学报》2002年第6期495-499,共5页Acta Physico-Chimica Sinica

基　　金：国家973基金(G2000078100)资助项目

摘　　要：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 dimethylamino chalcone modified β-cyclodextrin by different transition metal ions in various solvents has been studied. It was found that the modified β-cyclodextrin has a specific recognition ability to Cu2+ in aqueous solution, and the quenching constant is about one order of magnitude larger than that of other metals which were studied in this work. But in non-aqueous solvents, such as in DMF, the specific recognition ability of Cu2 + disappeared. And the Ni2 *, which has a planar configuration, presented the strongest ability of complex formation. It was resulted from the four ethylene groups connected each other by hetero-atom in linking chain of the modified B-cyclodextrin to make the formation of planar square configuration easily. The results demonstrated that the possibility of the spacial structure match of the host and the guest plays a very important role in the complex formation.

关 键 词：二甲氨基查耳酮 光物理行为 Β-环糊精 过渡金属离子 分子识别 荧光猝灭 化学修饰 

分 类 号：O644[理学—物理化学]