客体分子末端基团驱动的七元瓜环类轮烷自组装  

Effects of Terminal Groups of Guest on the Pseudorotaxane Assembly of Cucurbit [7] uril

作　　者：易君明[1,2] 宋森[1] 张胜 张少威 田蒙奎[1] 倪新龙[1] YI Junming;SONG Sen;ZHANG Sheng;ZHANG Shaowei;TIAN Mengkui;NI Xinlong(Key Laboratory of Macrocyclic and Supramolecular Chemistry of Guizhou Province,School of Chemistry and Chemical Engineering,Guizhou University, Guiyang 550025, China;College of Biology and Chemistry,Xingyi Normal University for Nationalities, Xingyi 562400, China)

机构地区：[1]贵州大学贵州省大环化学及超分子化学重点实验室化学与化工学院,贵阳550025 [2]兴义民族师范学院化学生物系,兴义562400

出　　处：《高等学校化学学报》2018年第5期911-916,共6页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:21302026;21663009);贵州省科学技术基金(批准号:黔科合LH字[2016]7038号;20165656);贵州大学"大学生创新训练计划"项目(批准号:贵大SRT字[2015]158号)资助~~

摘　　要：以1,2-二(4-吡啶基)乙烯为母体,设计合成了系列基于烷基链末端基团分别为—COOH,—CH_2Br和—CH_3的阳离子型线性客体分子(G1~G3).研究结果表明,末端基团为—COOH的客体分子G1可驱动七元瓜环滑过1,2-二(4-吡啶基)乙烯形成[2]类轮烷分子梭及[3]类轮烷;客体分子G2和G3则不能驱动七元瓜环滑过吡啶基乙烯母体部分,但是G2的—CH_2Br基团可驱动七元瓜环靠近吡啶基乙烯基团并形成稳定的[2]类轮烷.这一现象可归因于链状分子末端基团与瓜环端口羰基氧作用时的静电势差异.Three guests bearing different terminal groups —COOH（ G1）,—CH2 Br（ G2） and —CH3（ G3）were synthesized based on the bispyridinium ethylene-core,respectively. The experiment results suggest that Q[7]host could slip the bispyridinium ethylene-core in the assistance of the terminal moiety —COOH of G1,and [2]pseudorotaxane based molecular shuttle could be formed between G1 and Q[7],whereas the terminal moiety —CH2 Br（ G2） and —CH3（ G3） could not help Q[7]host slip the bispyridinium ethylene-core. This could be attributed to the different electrostatic potential properties between the terminal groups of the guest and the carbonyl portals of Q[7].

关 键 词：瓜环 类轮烷 分子驱动力 主客体作用 

分 类 号：O622.6[理学—有机化学] O641.3[理学—化学]