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| - Synthesis, Characterization, Electrochemistry, and EQCMStudies of Polyamidoamine DendrimersSurface-Functionalized with Polypyridyl Metal Complexes
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| - Polyamidoamine dendrimers have been surface-modified via peptide coupling with pyridyl, bipyridyl,and terpyridyl ligands to give the analogous polypyridyl dendrimer ligands in high yield. Complexationof the pendant chelating groups with appropriate ruthenium(II) precursor complexes yielded dendrimerssurface-functionalized with tris(bipyridyl)ruthenium(II) or bis(terpyridyl)ruthenium(II) pendant complexes.Electrochemical studies of the dendrimer complexes show metal-centered and ligand-centered redox couples.These molecules also adsorb onto platinum electrodes, and the deposition process and the properties ofthe resulting films have been investigated with the electrochemical quartz crystal microbalance. Theresulting films exhibit morphological changes with potential that can be attributed to the deposition ordissolution of the dendrimer and/or to ejection or incorporation of counterions and/or solvent into the film.A number of the electrodeposited films exhibited charge trapping peaks. Dendrimers containing terminaltris(bipyridyl)ruthenium(II) complexes exhibited room-temperature luminescence, while these anddendrimers with terminal bis(terpyridyl)ruthenium(II) complexes exhibited luminescence in a rigidbutyronitrile matrix at 77 K.
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