Abstract

Podands, coronands and cryptands containing 2,2′-bipyridine-units were synthesized. These Compounds can be used as ligands in Ru(II)-polypyridinecomplexes. This new route principally allows the preparation of tris-heteroleptic complexes using the appropriate cryptands. Ru(II)- polypyridines RuL3 2+ (e.g. Ru(bpy)3 2+) are interesting as sensitizers in photochemical water cleavage. Compared to Ru(bpy)3 2+, the photoanationrate should be reduced in the Ru(cryp)2+ complex.

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