p-(4-Nitrophenylazo)phenol Dye-bridged Permethylated α-Cyclodextrin Dimer: Synthesis and Self-aggregation in Dilute Aqueous Solution

The title compound 1 exhibited the time-dependence of the VIS and 1H-NMR spectra in aqueous solution at room temperature in the dark. These phenomena were interpreted in terms of the self-aggregation involving intermolecular inclusion of the p-(4-nitrophenylazo)phenol group with one of the two permethylated α-cyclodextrins of 1.

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