葫芦[8]脲的环套环分子组装  

Ring-in-ring Molecular Assembly with Cucurbit [8] uril

作　　者：白图雅[1] 陈岭[1] 张衡益[1] 刘育[1] 

机构地区：[1]南开大学化学系,元素有机化学国家重点实验室,天津300071

出　　处：《高等学校化学学报》2013年第1期91-95,共5页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:20932004,20972077)资助

摘　　要：以4,4'-联吡啶!、2,6-萘二酚和2,7-萘二酚为基本结构单元,设计合成了2种带有分子内给受体相互作用的大环化合物,并采用紫外光谱和核磁共振等手段研究了其与葫芦[8]脲的键合行为.研究结果表明,在水溶液中大环的2,6-萘二酚和2,7-萘二酚与4,4'-联吡啶!之间存在分子内的电荷转移相互作用,而葫芦[8]脲可以键合这2种大环化合物,导致电荷转移吸收峰增强并红移,表明葫芦[8]脲能增强这种分子内的电荷转移相互作用,形成稳定的环套环分子组装体.这种结构是基于葫芦[8]脲的新型拓扑结构.Ring-in-ring complexation is a novel topological structure in supramolecular chemistry. Two macro- cyclic compounds with intramolecular donor-acceptor interactions were designed and synthesized with 4,4＇-bi- pyridinium, 2,6-dinaphthol and 2,7-dinaphthol as building blocks. Their associations with cucurhit [ 8 ] uril were investigated by means of UV-Vis and ~ H NMR. The spectra results show that intramolecular charge trans- fer（CT） interaction exsits in aqueous solution of these two macrocycles, and cucurbit[8] uril can bind the two macrocycles. The binding resuh in the increase of charge transfer（CT） absorption strength and red shift of CT absorption peak, indicating the formation of stable ring-in-ring complexes. These ring-in-ring complexes are new topological structures for cucurbit [ 8 ] uril.

关 键 词：大环化合物 电荷转移相互作用 环套环分子组装体 

分 类 号：O625[理学—有机化学]