Ontology highlight
ABSTRACT:
SUBMITTER: Gholami G
PROVIDER: S-EPMC5851341 | biostudies-literature | 2017 Nov
REPOSITORIES: biostudies-literature
Chemical science 20170925 11
A series of [2]rotaxane molecular shuttles was prepared containing a dibenzo[24]crown-8 (<b>DB24C8</b>) wheel and a rigid H-shaped axle with varying track lengths between recognition sites; from 7.4 to 20.3 Å as defined by 1-4 phenyl rings or a naphthyl group. The rate of shuttling was measured by variable temperature <sup>1</sup>H NMR spectroscopy for neutral compounds and EXSY experiments for dicationic species. The rates were found to be independent of the length of the axle, except when the ...[more]