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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。
With 4- (2- (4- (benzyloxy) phenoxy) ethoxy) -1,2,3-butanetriol (C) as electron donor rich ether chain, (CPQT) and tetrafluorocyclofuran (4FCPQT) were self-assembled to form the supermolecular pseudorotaxanes C (CPQT) and C (4FCPQT) by 1H-NMR Chemical shift changes to study the two different quasiprotrianes in the temperature changes in their interaction. The experimental results show that, because the electron-rich donor has three hydroxyl groups at one end and the hydrogen bond is easily formed between the bipyridyl ring and the electron-deficient bipyridine ring, the butanetriol end of the ether chain can not enter the macrocycle; After the ring hydrogen is replaced by fluorine, the probability of electron rich donors entering the macrocycle is relatively reduced due to the action of electric field force, and the “electron donating” effect occurs when the electron rich ether chain donors penetrate into the macrocycle.