(matrix presented) Newly synthesized bis(β-cyclodextrin-6-yl) 2,2′-bipyridine-4,4′-dicarboxylate was found to induce an unusual fluorescence enhancement of Rhodamine B (RhB) upon complexation This effect is attributable to the equilibium shift of RhB to the highly fluorescent carboxylate ion form, which is induced by the cooperative binding by two appropriately preorganized cyclodextrin units in the bis(β-cyclodextrin). This sandwich complexation behavior was investigated by means of the fluorescence and 2D NMR spectroscopy.
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Organic Chemistry