Premium
Cover Picture: Construction of Crown Ether‐Stoppering [3]Rotaxanes Based on N ‐Hetero Crown Ether Host (Chin. J. Chem. 7/2017)
Author(s) -
Han Xie,
Li Ziyong,
Xu Zhiqiang,
Zhao Zhiyong,
Liu Sheng Hua,
Yin Jun
Publication year - 2017
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Reports
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201770071
Subject(s) - crown ether , chemistry , crown (dentistry) , ether , clipping (morphology) , cover (algebra) , polymer chemistry , stereochemistry , organic chemistry , materials science , composite material , mechanical engineering , ion , linguistics , philosophy , engineering
The cover picture shows shows the construction of crown etherstoppering [3]rotaxanes based on N ‐hetero crown ether host. Usually, crown ethers play the role of host macrocycles to combine with the guest molecules in the construction of rotaxanes. Based on the fact that crown ethers have large dimension, two [3]rotaxanes containing four crown ether units were designed and synthesized, of which, two N ‐hetero crown ether components were employed as the macrocyclic hosts to assemble the mechanically interlocked framework by using a template‐directed clipping reaction while bis (metaphenylene‐26‐crown‐8) located on two sides of template diammonium acting as the stoppering groups of [3]rotaxanes. More details are discussed in the article by Yin et al. on page 1050–1056.