The complexation of alkyl-substituted pillar[5]arenes with primary ammonium salts is investigated. 1,4-Bis- （methoxy）pillar[5]arene （MeP5） can form strong complexes with the primary ammonium salts in CDC13. Howeve...The complexation of alkyl-substituted pillar[5]arenes with primary ammonium salts is investigated. 1,4-Bis- （methoxy）pillar[5]arene （MeP5） can form strong complexes with the primary ammonium salts in CDC13. However, 1,4-bis（ethoxy）pillar[5]arene （EtP5） shows weak interaction with these guests, and 1,4-bis（butoxy）pillar[5]arene （BuP5） can not form such a complex at all. These results indicate that the modified alkyl chains of pillar[5]arene play an important role in the complexation selectivity.展开更多
A series of novel copillar[5]arenes 1a-1f containing different substituents were synthesized.And their com-plexation with two types of guests was investigated.For symmetrical guests,1,4-dibromobutane(DBB)could thread ...A series of novel copillar[5]arenes 1a-1f containing different substituents were synthesized.And their com-plexation with two types of guests was investigated.For symmetrical guests,1,4-dibromobutane(DBB)could thread in the cavity of copillar[5]arenes to form inclusion complexes.But for the unsymmetrical guests,copillar-[5]arene 1f bearing 4-(naphthalen-1-yloxy)butoxy could not complex with sec-butyl iodide(SBI)and sec-butyl bromide(SBB)at all,while 1f showed weak interaction with sec-butylamine•HCl(SBA)outside the cavity.These results indicated that the modified group of copillar[5]arene and the symmetry of guest played an important role in the complexation model and selectivity.展开更多
A systematic research of the structural characterization and the host-guest binding abilities between three types of pillar[5]arenes 3-5(3 for Structure Type I,4 for Structure Type II and 5 for Structure Type III)is c...A systematic research of the structural characterization and the host-guest binding abilities between three types of pillar[5]arenes 3-5(3 for Structure Type I,4 for Structure Type II and 5 for Structure Type III)is carried out by 1H NMR measurements and X-ray study.The results show that the configurations or symmetry of their cavities not only have large difference in these three types of pillar[5]arenes,but also have more or less variations even in the same structure type or the same host locked different guests such as crystals of 3a-3b,4a-4d.On the other hand,the complexation behavior of pillar[5]arenes with 1,4-dibromobutane(DBB)is affected by the different symmetri-cal structure or substituents on the rings.展开更多
基金We are grateful to the National Natural Science Foundation of China，the Natural Science Foundation of Guangxi Province
文摘The complexation of alkyl-substituted pillar[5]arenes with primary ammonium salts is investigated. 1,4-Bis- （methoxy）pillar[5]arene （MeP5） can form strong complexes with the primary ammonium salts in CDC13. However, 1,4-bis（ethoxy）pillar[5]arene （EtP5） shows weak interaction with these guests, and 1,4-bis（butoxy）pillar[5]arene （BuP5） can not form such a complex at all. These results indicate that the modified alkyl chains of pillar[5]arene play an important role in the complexation selectivity.
基金the National Natural Science Foundation of China(No.21402033)the Guangxi Natural Science Foundation of China(No.2013GXNSFBA019033)+1 种基金the Guangxi Experiment Cen-tre of Science and Technology(No.YXKT2014009)the Scientific Research Foundation of Guangxi University(No.XBZ130017).
文摘A series of novel copillar[5]arenes 1a-1f containing different substituents were synthesized.And their com-plexation with two types of guests was investigated.For symmetrical guests,1,4-dibromobutane(DBB)could thread in the cavity of copillar[5]arenes to form inclusion complexes.But for the unsymmetrical guests,copillar-[5]arene 1f bearing 4-(naphthalen-1-yloxy)butoxy could not complex with sec-butyl iodide(SBI)and sec-butyl bromide(SBB)at all,while 1f showed weak interaction with sec-butylamine•HCl(SBA)outside the cavity.These results indicated that the modified group of copillar[5]arene and the symmetry of guest played an important role in the complexation model and selectivity.
基金the National Natural Science Foundation of China(Nos.21072064,21402033)the Guangxi Natural Science Foundation of China(No.2013GXNSFBA019033)for the financial support.
文摘A systematic research of the structural characterization and the host-guest binding abilities between three types of pillar[5]arenes 3-5(3 for Structure Type I,4 for Structure Type II and 5 for Structure Type III)is carried out by 1H NMR measurements and X-ray study.The results show that the configurations or symmetry of their cavities not only have large difference in these three types of pillar[5]arenes,but also have more or less variations even in the same structure type or the same host locked different guests such as crystals of 3a-3b,4a-4d.On the other hand,the complexation behavior of pillar[5]arenes with 1,4-dibromobutane(DBB)is affected by the different symmetri-cal structure or substituents on the rings.
