Studies on [3]pseudorotaxane formation from a bis-azacrown derivative as host and imidazolium ion-derivatives as guest
作者:Amal Kumar Mandal、Moorthy Suresh、Amitava Das
DOI:10.1039/c0ob01106a
日期:——
having two azacrown derivatives bridged by luminescent naphthalene diimide functionality, is found to form a [3]pseudorotaxane derivative with imidazolim ion-based guest molecules in non-polar solvents through hydrogen-bonded adduct formation. Depending upon the length of the covalent linker that links the imidazolium ion and the luminescent naphthalene fragment in the guests, the [3]pseudorotaxane adducts
发现具有两个通过发光的萘二酰亚胺官能团桥接的氮杂皇冠衍生物的新主体分子,通过氢键合加合物的形成,在非极性溶剂中与基于咪唑林离子的客体分子形成[3]假轮烷衍生物。根据连接客人中咪唑鎓离子和发光萘片段的共价接头的长度,[3]假轮烷加合物采用不同的构象或取向,并具有不同的π-π/供体-受体相互作用。NDI片段在加合物形成过程中萘基发光猝灭的机理被发现是静态和动态的组合,其中静态猝灭为主导。