摘要：综述了冠醚化学研究的最新进展 :包括低对称冠醚、臂式冠醚、双冠醚等的分子设计和离子键合。

摘要：以均苯四甲酸二酰亚胺和1,5-萘二酚为基本结构单元,设计合成了一种不对称的37-冠-10(1),解析了其晶体结构,并采用紫外-可见光谱和核磁共振等手段研究了冠醚1与一些阳离子的键合行为.晶体结构测试表明,冠醚1存在分子内的电荷转移相互作用,生成的较小空腔对较小的离子表现出较强的键合能力.光谱测试结果表明,冠醚1对锂离子的键合作用最强,对钠离子的键合作用次之,对其它碱金属/碱土金属离子没有键合作用.

摘要：以4,4'-联吡啶!、2,6-萘二酚和2,7-萘二酚为基本结构单元,设计合成了2种带有分子内给受体相互作用的大环化合物,并采用紫外光谱和核磁共振等手段研究了其与葫芦[8]脲的键合行为.研究结果表明,在水溶液中大环的2,6-萘二酚和2,7-萘二酚与4,4'-联吡啶!之间存在分子内的电荷转移相互作用,而葫芦[8]脲可以键合这2种大环化合物,导致电荷转移吸收峰增强并红移,表明葫芦[8]脲能增强这种分子内的电荷转移相互作用,形成稳定的环套环分子组装体.这种结构是基于葫芦[8]脲的新型拓扑结构.

摘要：Two novel benzo 15 crown 5 derivatives containing thiocycle(3) and selenacycle(4) have been synthesized in the presence of Na 2S·9H 2O or Na 2Se 2 and characterized by elemental analysis and mass, IR, UV and 1H NMR spectroscopy. The cation binding abilities and selectivities of parent benzo 15 crown 5(1) and its derivatives 3 and 4 with alkali and heavy metal ions have been evaluated by solvent extraction of aqueous metal picrates. The results obtained indicated that novel selera 3 cyclopentene[3,4 d]benzo 15 crown 5(4) showed moderate extractability and selectivity for Ag + over any other alkali and heavy metal ions. [WT5HZ]

摘要：Three novel benzocrown ether derivatives have been synthesized and their cation binding behavior with uni- and bi-valent metal ions was evaluated by the solvent extraction of aqueous metal picrates. The obtained results indicate that the size-fit of crown ether and metal cation, and electron effect of the side arm attached to benzocrown ethers affect their cation binding ability and selectivity.