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Research Article Open access CC BY 4.0

β-Cyclodextrin Supramolecular Recognition of bis-Cationic Dithienylethenes

Giulio Bianchini, Mattia Bazan, Fabrizio Fabris, Alessandro Scarso

Organics · pp. 77–86 · Published 6 Apr 2022

10.3390/org3020005

Abstract

The supramolecular interactions in water between β-cyclodextrin and the open and closed photochromic forms of two bis-cationic dithienylethenes, characterized by different electronic properties, were investigated aiming at underlying the key aspects of the recognition process. The dithienylethene equipped with the cyclopentenyl unit showed a difference in binding free energies to the β-cyclodextrin between the open and closed photochromic forms of about 1 kJ/mol. Conversely, the dithienylethene equipped with the perfluorinated cyclopentenyl unit not only was a better guest but showed a three times higher difference in the binding of free energies between the open and closed isomers.

Photochromism Cationic polymerization Supramolecular chemistry Cyclodextrin Chemistry Supramolecular assembly Combinatorial chemistry Stereochemistry

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