杯芳烃作为继环糊精、冠醚之后的第三代大环类主体化合物，对金属离子具有较强的选择性萃取作用。
Calixarene is a kind of respecting host macrocyclic compound followed cyclodextrin and crown ether, and has strong ability of selective extraction of metal ions.
如何设计对单一金属离子具有高选择性的冠醚，一直是人们所面临的具有挑战性的课题。
It is a challenge for people to design more highly selective crown ether for single metal ions.
最后估算了冠醚分子络合碱金属离子的结合能。
Thirdly, the binding energy of a crown-ether molecule complexing with an alkali-metal ion is estimated.
综述了冠醚改性硅胶萃取分离金属离子的研究进展，对其制备、应用等也进行了详细的介绍。
This review deals with the progress in the studies of silica gel bound crown for extraction and separation of metal ions. The preparation, application and instrument are described in detail.
合成了一种新的双冠醚，氧化偶氮双苯并15 -冠- 5。初步探讨了它的光异构现象及其对稀土和碱金属离子的萃取能力。
Azoxybisbenzo-15-crown-5 was synthesized. Photoinduced trans-cis isomerization as well as its ability to extract alkali metals and rare earth metals' were dis-cussed.
合成了一种新的双冠醚，氧化偶氮双苯并15 -冠- 5。初步探讨了它的光异构现象及其对稀土和碱金属离子的萃取能力。
Azoxybisbenzo-15-crown-5 was synthesized. Photoinduced trans-cis isomerization as well as its ability to extract alkali metals and rare earth metals' were dis-cussed.
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