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Dendritic Bipyridine Ligands and Their Tris(Bipyridine)Ruthenium(II) Chelates—Syntheses, Absorption Spectra, and Photophysical Properties

✍ Scribed by Jörg Issberner; Fritz Vögtle; Luisa De Cola; Vincenzo Balzani

Book ID
102792903
Publisher
John Wiley and Sons
Year
1997
Tongue
English
Weight
731 KB
Volume
3
Category
Article
ISSN
0947-6539

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✦ Synopsis

Several synthetic strategies havc been explored to prepare dendrimers having the [Ru(bpy)J2+ complex as their core (bpy = 2,2'-bipyridine). Dendritic ligands have bcen synthesized by attaching branches in the 4,4'-positions of bpy. The largest dendritic bipyridine ligand contains 54 peripherical inethylester units. Four Ru" dendritic complexes have been prepared. Their absorption and emission spectra are very similar to those of the unsubstituted parent Ru"bipyridine complexes. The large dendritic complexes, however, exhibit a more intense emission and a longer excited-state lifetime than Keywords bipyridine ligands dioxygen quenching ruthenium * dendrimers * * luminescence * 1997 f~u47-n53YjY7/U3oS-O7oX d 17.50-t S O i O

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