Photoactive cryptands. Synthesis of the sodium cryptates of macrobicyclic ligands containing bipyridine and phenoanthroline groups |
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Authors: | Juan-Carlos Rodriguz-Ubis Batrice Alpha Dominique Plancherel Jean-Marie Lehn |
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Institution: | Juan-Carlos Rodriguz-Ubis,Béatrice Alpha,Dominique Plancherel,Jean-Marie Lehn |
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Abstract: | The NaBr cryptates of five macrobicyclic ligands containing bipyridine (bpy) and phenanthroline (phen) groups, i.e, of bpy.bpy.bpy] 1 bpy.bpy.phen] 2 phen.phen.-phen] 3 2.1.phen] 4 and 2.2.phen] 5 , have been prepared. 1, 2, 4 and 5 have been obtained in high yield by condensation of bis(bromomethyl)bipyridine 6 or -phenanthroline 9 with the corresponding macrocyclic diamines in presence of Na2CO3. Direct access to the NaBr complexes of th symmetrical cryptands 1 and 3 was achieved by a one-step macrobicyclisation procedure. The metal-ion complexes of ligands 1-5 have the attractive feature of combining the cation inclusion, nature of cryptates with the photoactivity of bipyridine and phenanthroline groups; they may thus be expected to posses a variety of interesting physical and chemical properties. |
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