Host-guest interactions between N,N′-bis(ferrocenylmethylene)- diaminobutane and benzenetetracarboxylic dianhydride bridged bis(β-cyclodextrin)s

Abstract

A novel water soluble ditopic guest, the quaternary ammonium salt of N,N′-bis(ferrocenylmethylene)-diaminobutane (1), and a known water soluble ditopic host, benzenetetracarboxylic dianhydride bridged bis(β- cyclodextrin)s (2), have been synthesized and characterized. 1H NMR spectra and cyclic voltammogram (CV) studies revealed the host-guest interactions between them in aqueous solution. The supramolecular interaction also exists in solid state as confirmed by the studies of the solid samples, which were obtained by frozen-drying the solution samples, using FTIR spectroscopy and differential scanning calorimetry (DSC) techniques. TEM measurement demonstrated that wire-shaped supramolecular aggregates exist in the aqueous solution of the two compounds. The lengths of the aggregates could reach micrometers. © 2006 SIOC, CAS, & Wiley-VCH Verlag GmbH & Co. KGaA.