180397-93-7Relevant academic research and scientific papers
Self-Assembling - and Rotaxanes from Secondary Dialkylammonium Salts and Crown Ethers
Ashton, Peter R.,Glink, Peter T.,Stoddart, J. Fraser,Tasker, Peter A.,White, Andrew J. P.,Williams, David J.
, p. 729 - 736 (2007/10/03)
The self-assembly of three new rotaxanes - two rotaxanes and a rotaxane - formed by a "threading followed by stoppering" approach is described.These template-directed syntheses rely on the formation of pseudorotaxane intermediates, which self-assemble in solution from functionalized secondary dialkylammonium hexafluorophosphate threads and macrocyclic polyether rings (either dibenzocrown-8 or its asymmetric constitutional isomer).The stoppers - substituted 1,2,3-triazoles - were created by thermally allowed 1,3-dipolar cycloaddition between azido groups, which terminate the threads, and di-tert-butyl acetylenedicarboxylate. - Keywords: interlocking molecules; molecular recognition; pseudorotaxanes; rotaxanes; template syntheses
