Multiple Molecular Recognition Host System using Charge-Transfer Complex of 3,3′-Disubstituted-1,1′-bi-2-naphthol and Methylviologen

A charge-transfer (CT) complex composed of rac-3,3′-dibromo-1,1′-bi-2-naphthol as an electron donor and 1,1′-dimethyl-4,4′-bipyridinium dichloride as an electron acceptor serves as a host system. This CT host system exhibits multiple molecular recognition property (selective inclusion behavior, change in color, and diffuse reflectance spectra of inclusion complex depending on the included guest).