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DRX-400 spectrometer, FTIR spectra were recorded on a Perkin-ElmerI600; UY-Vis on a Safas UVmc l . Luminescence experiments were performed on a Spex Fluorolog II photon counting spectrofluorimeter equipped with a 450W xenon continous wave irradiation source Mass spectra were recorded in FAB positive mode on a ZAB-SEQ mass spectrometer. The new compounds gave satisfaclory spectroscopic data Beptakis~5-metbyleDe-ureido-5'-metbyI-2.2'-bipyridiDyl}-<:yclomaltobeptaose. Obtained by condensation of 1 (0.006 mmol, 0.077g,1 equiv95 mmol, 0.20g, 16 equiv.) and triphenyl phosphane (4.10 mmol, 1.075g, 70 equiv.) After evaporation of the DMF, the residue was treated with dielhyl ether, filtered, treated with methylene chloride then filtered once more to give 3, an orange pure powder (0.13g, 82%); UY-Vis (À max nm) : 250 (shoulder), C=O urea), 1557 (C=C aromatics); IH NMR (DJ)MSO, 25°) 0 (ppm) : 8.48 cyclodextrin and CH] bipyridin»CH J , bipyridin». DC NMR (DJ)MSO, 25°) 0 (ppm) : 158.0 (N-CO-NH), pp.1347-1350, 1961. ,
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