Supramolecular polypseudorotaxane with conjugated polyazomethine prepared directly from two inclusion complexes of β-cyclodextrin with tolidine and phthaldehyde.

Abstract

The supramolecular polypseudorotaxane (3) with π-conjugated polyazomethine is directly

synthesized by the polycondensation of two simple inclusion complexes of β-cyclodextrin/o-tolidine (1)

and β-cyclodextrin/p-phthaldehyde (2) and is comprehensively characterized by NMR, FTIR, circular

dichroism spectra, powder X-ray diffraction, thermogravimetric (TG) and differential thermal analysis

(DTA), scanning electron microscopy (SEM), and scanning tunneling microscopy (STM) both in solution

and in the solid state. The results obtained have revealed linear microstructure of polypseudorotaxane

3 and different photophysical behavior as compared with the π-conjugated polyazomethine backbone (4).

The present investigations prove a simple method for preparing supramolecular polypseudorotaxane by

different complexes, which possess the potential to serve as molecular devices/machines and optical

materials.