Catenanes with desymmetrized ring components can undergo co-conformational rearrangements upon external stimulation and can form the basis for the development of molecular rotary motors. We describe the design, synthesis and properties of a [2]catenane consisting of a macrocycle—the ‘track’ ring—endowed with two distinct recognition sites (a bipyridinium and an ammonium) for a calix[6]arene—the ‘shuttle’ ring. By exploiting the ability of the calixarene to thread appropriate non-symmetric axles with directional selectivity, we assembled an oriented pseudorotaxane and converted it into the corresponding oriented catenane by intramolecular ring closing metathesis. Cyclic voltammetric experiments indicate that the calixarene wheel initially surrounds the bipyridinium site, moves away from it when it is reduced, and returns in the original position upon reoxidation. A comparison with appropriate model compounds shows that the presence of the ammonium station is necessary for the calixarene to leave the reduced bipyridinium site.

Electrochemically triggered Co-conformational switching in a [2]catenane comprising a non-symmetric calix[6]arene wheel and a two-station oriented macrocycle / Zanichelli, Valeria; Dallacasagrande, Luca; Arduini, Arturo; Secchi, Andrea; Ragazzon, Giulio; Silvi, Serena; Credi, Alberto. - In: MOLECULES. - ISSN 1420-3049. - 23:5(2018), pp. 1156-1167. [10.3390/molecules23051156]

Electrochemically triggered Co-conformational switching in a [2]catenane comprising a non-symmetric calix[6]arene wheel and a two-station oriented macrocycle

Zanichelli, Valeria
Investigation
;
DALLACASAGRANDE, LUCA
Investigation
;
Arduini, Arturo
Membro del Collaboration Group
;
Secchi, Andrea
Writing – Review & Editing
;
2018

Abstract

Catenanes with desymmetrized ring components can undergo co-conformational rearrangements upon external stimulation and can form the basis for the development of molecular rotary motors. We describe the design, synthesis and properties of a [2]catenane consisting of a macrocycle—the ‘track’ ring—endowed with two distinct recognition sites (a bipyridinium and an ammonium) for a calix[6]arene—the ‘shuttle’ ring. By exploiting the ability of the calixarene to thread appropriate non-symmetric axles with directional selectivity, we assembled an oriented pseudorotaxane and converted it into the corresponding oriented catenane by intramolecular ring closing metathesis. Cyclic voltammetric experiments indicate that the calixarene wheel initially surrounds the bipyridinium site, moves away from it when it is reduced, and returns in the original position upon reoxidation. A comparison with appropriate model compounds shows that the presence of the ammonium station is necessary for the calixarene to leave the reduced bipyridinium site.
Electrochemically triggered Co-conformational switching in a [2]catenane comprising a non-symmetric calix[6]arene wheel and a two-station oriented macrocycle / Zanichelli, Valeria; Dallacasagrande, Luca; Arduini, Arturo; Secchi, Andrea; Ragazzon, Giulio; Silvi, Serena; Credi, Alberto. - In: MOLECULES. - ISSN 1420-3049. - 23:5(2018), pp. 1156-1167. [10.3390/molecules23051156]
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11381/2848090
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