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Dynamic Covalently Bonded Rotaxanes Cross‐Linked by Imine Bonds between the Axle and Ring: Inverse Temperature Dependence of Subunit Mobility
Author(s) -
Kawai Hidetoshi,
Umehara Takeshi,
Fujiwara Kenshu,
Tsuji Takashi,
Suzuki Takanori
Publication year - 2006
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.200600750
Subject(s) - rotaxane , axle , covalent bond , imine , ring (chemistry) , molecular machine , chemistry , bond cleavage , cleavage (geology) , dynamic covalent chemistry , crystallography , stereochemistry , materials science , nanotechnology , physics , organic chemistry , thermodynamics , supramolecular chemistry , fracture (geology) , crystal structure , composite material , catalysis
Building bridges : Imine bridges between the axle and ring components in rotaxanes allow simple rotaxane synthesis and a novel method for motion control to be developed. The submolecular mobility in this rotaxane‐type assembly is regulated by the imine‐bond formation/cleavage (see scheme). The relative abundance of the [2]rotaxane increases with decreasing temperature under dynamic equilibrium conditions.