Synthesis and Shuttling Behavior of Rotaxanes Consisting of Crown Ether Wheel and Disulfide Dumbbell with Two Ammonium Centers

Bulletin of the Korean chemical society

Ryoko Sanno¹  Yoshio Furusho¹  Tomoya Oku¹  Toshikazu Takata¹ 

关键词: [2]Rotaxane;    Crown ether;    Ammonium salt;    Disulfide;    Shuttling;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

Several [2]- and [3]rotaxanes bearing some functional groups on their wheel components and spacers with different lengths between two ammonium centers on their dumbbell components were prepared in good yields from dibenzo-24-crown-8-ether derivatives and dumbbell-shaped bis(sec-ammonium salt)s having a centrally located disulfide linkage, by utilizing the reversible thiol-disulfide interchange reaction. The shuttling behaviors of the [2]rotaxanes were investigated by 1H NMR by use of the spin polarization transfer-selective inversion recovery technique. It was found that the change in spacer length in the axle resulted in a drastic change in shuttling rate of the [2]rotaxanes, although the introduction of the functional groups to the wheels did not affect the shuttling behavior at all.

【 授权许可】

Unknown