Chiroptical switching in a bistable molecular shuttle |
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Authors: | Bottari Giovanni Leigh David A Pérez Emilio M |
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Institution: | School of Chemistry, University of Edinburgh, The King's Buildings, West Mains Road, Edinburgh EH9 3JJ, UK. |
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Abstract: | Although various methods for switching the positions of macrocycles in bistable rotaxane-based molecular shuttles have been developed, exploiting such movements to trigger property changes has thus far received little attention. Here we describe one of the first examples of a property change achieved through a controlled large-amplitude translational motion in a rotaxane; a novel type of chiroptical switch is described, in which light-induced translation of the macrocycle along the thread of a 2]rotaxane produces a strong induced circular dichroism (ICD) response only when the macrocycle is hydrogen-bonded to a chiral peptide station. |
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