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Tightening or loosening a pH-sensitive double-lasso molecular machine readily synthesized from an ends-activated [c2]daisy chain

AuthorsRomuald, C.; Ardá, Ana ; Clavel, Caroline; Jiménez-Barbero, Jesús ; Coutrot, F.
Issue Date2012
PublisherRoyal Society of Chemistry (UK)
CitationChemical Science, 3 (6) : 1851-1857 (2012)
AbstractThe ready synthesis of a new double-lasso molecular machine from an ends-activated [c2]daisy chain has been achieved. This original architecture consists of a unique double-lasso structure, where the two macrocycles can slide along the threaded pseudo-macrocycle upon variation of pH. The interlocked structure allows for two very different conformations: at low pH, it has a loose conformation with a big cavity. The interlocked molecule thus behaves like a controllable “jump rope”. After deprotonation, the molecule adopts a helical-type tightened conformation with a shrunken cavity. In this conformation, no jump rope movement is possible due to the tightened lasso
Description7 páginas, 7 figuras, 2 esquemas -- PAGS nros. 1851-1857
Publisher version (URL)http://dx.doi.org/10.1039/C2SC20072D
Appears in Collections:(CIB) Artículos
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