Axle Length Does Not Affect Switching Dynamics in Degenerate Molecular Shuttles with Rigid Spacers
Philip G. YoungDivision of Frontier
Materials
Science, Graduate School of Engineering Science, Osaka University, 1-3
Machikaneyama, Toyonaka 560-8531, JapanKeiji HiroseDivision of Frontier
Materials
Science, Graduate School of Engineering Science, Osaka University, 1-3
Machikaneyama, Toyonaka 560-8531, JapanYoshito TobeDivision of Frontier
Materials
Science, Graduate School of Engineering Science, Osaka University, 1-3
Machikaneyama, Toyonaka 560-8531, Japan
2014en
ABI
Abstract
For a series of [2]rotaxane molecular shuttles possessing linear rigid rod-like axles of varying lengths between degenerate recognition sites, the activation barrier for shuttling motion was clearly shown to be constant. Moreover, dynamic NMR studies have revealed that both the entropic and enthalpic contributions to the shuttling motion remain constant regardless of the actual length of the rigid rod-like axles employed herein.
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