摘要
以4-(2-(4-(苄氧基)苯氧基)乙氧基)-1,2,3-丁三醇(C)为富电子供体的醚链,与缺电子联吡啶大环化合物环双(百草枯-亚苯基)四阳离子环蕃(CPQT)和四氟取代环蕃(4FCPQT)自组装形成超分子准轮烷C(CPQT)和C(4FCPQT),并利用1HNMR的化学位移变化来研究两种不同准轮烷在温度变化时它们的相互作用。实验结果表明,由于富电子供体的一端含有3个羟基,易和缺电子联吡啶大环形成氢键,因此醚链的丁三醇端不能进入大环;缺电子联吡啶大环的一个苯环上的氢被氟取代后,由于电场力的作用,使富电子供体进入大环的概率相对降低,并使富电子醚链供体穿入大环的位置发生"偏心"作用。
A novel pseudorotaxane of the 4-(2-(4-(benzyloxy) phenoxy) ethoxy) butane-1,2,3-triol (C) with the Cyclophanes ( CPQT and 4FCPQT) was formed in solution by self-assembly. Supramolecular properties were investigated by 1 H NMR with varying temperature. The results showed that the triol end of C could not enter the ring of the Cyclophanes because the hydrogen bond was formed between the hydroxyl of C and the hydrogen of Cyclophanes. The probability of the C entering the 4FCPQT decreased because of the force of electric field after the hydrogen of the CPQT was replaced by fluorine. And the irruptive position of C entering 4FCPQT is acentric.
出处
《化学通报》
CAS
CSCD
北大核心
2010年第4期371-376,共6页
Chemistry
基金
国家自然科学基金项目(20872051)资助