The back and forth motions of a crown-ether based wheel along the axis of a bistable rotaxane are triggered by the decarboxylation of 2-cyano-2-phenylpropanoic acid and detected by the oscillation of the EPR nitrogen splitting of a dialkyl nitroxide function mounted within the macrocyclic ring. When the p-Cl derivative of the acid is used, back and forth motions are accelerated. Conversely, with p-CH3 and p-OCH3 derivatives, the back motion is strongly inhibited by the insurgence of collateral radical reactions.

2-Cyano-2-phenylpropanoic Acid Triggers the Back and Forth Motions of an Acid-Base-Operated Paramagnetic Molecular Switch

Franchi P.;Poderi C.;Mezzina E.;Lucarini M.
2019

Abstract

The back and forth motions of a crown-ether based wheel along the axis of a bistable rotaxane are triggered by the decarboxylation of 2-cyano-2-phenylpropanoic acid and detected by the oscillation of the EPR nitrogen splitting of a dialkyl nitroxide function mounted within the macrocyclic ring. When the p-Cl derivative of the acid is used, back and forth motions are accelerated. Conversely, with p-CH3 and p-OCH3 derivatives, the back motion is strongly inhibited by the insurgence of collateral radical reactions.
Franchi P.; Poderi C.; Mezzina E.; Biagini C.; Di Stefano S.; Lucarini M.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11585/703265
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