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Use of Anions To Allow Translational Isomerism of a [2]Rotaxane
Author(s) -
Lin ChiFeng,
Lai ChienChen,
Liu YiHung,
Peng ShieMing,
Chiu ShengHsien
Publication year - 2007
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.200601432
Subject(s) - rotaxane , chemistry , reagent , pyridinium , dumbbell , solvent polarity , solvent , ion , molecular switch , molecule , stereochemistry , crystallography , polymer chemistry , combinatorial chemistry , supramolecular chemistry , medicinal chemistry , organic chemistry , medicine , physical therapy
We report a molecular [2]rotaxane which comprises a molecular cage and a dumbbell‐shaped component, in which translational isomerism can be performed reversibly through an in situ anion exchange process, that is, sequential addition of Bu 4 NCl/AgPF 6 reagent pairs. The [2]rotaxane incorporates two pyridinium and two dialkylammonium centers and functions as a triply operable molecular switch, which can be controlled through altering the polarity of the solvent, adding acidic and basic reagents (TFA/Et 3 N), and the varying the nature of the counteranions (Cl − vs PF 6 − ).