title: A novel pentiptycene bis(crown ether)-based [2](2)rotaxane whose two DB24C8 rings act as flapping wings of a butterfly.
abstract: A novel [2](2)rotaxane based on pentiptycene-derived bis(crown ether) can be efficiently synthesized via a "click chemistry" method and the subsequent N-methylation. Due to the different affinities of DB24C8 with the ammonium and triazolium stations, the wing-flapping movement of the DB24C8 "wings" in the [2](2)rotaxane can be easily achieved by acid/base stimulus.
authors.affiliation: Beijing National Laboratory for Molecular Sciences, CAS Key Laboratory of Molecular Recognition and Function, Institute of Chemistry, Chinese Academy of Sciences , Beijing 100190, China.
authors.forename: Ying-Xian
authors.initials: YX
authors.lastname: Ma
authors.forename: Zheng
authors.initials: Z
authors.lastname: Meng
authors.forename: Chuan-Feng
authors.initials: CF
authors.lastname: Chen
mesh_terms: D000873:Anthracenes / Q000737:chemistry*; D057930:Click Chemistry; D043844:Crown Ethers / Q000138:chemical synthesis* / Q000737:chemistry; D008956:Models, Chemical; D015394:Molecular Structure; D043862:Rotaxanes / Q000138:chemical synthesis* / Q000737:chemistry
chemical_list: D000873:Anthracenes; D043844:Crown Ethers; D043862:Rotaxanes; C545156:pentiptycene