No abstract

Generation-dependent cooperation was observed in the reduction of molecular oxygen by a series of Cu 2+ complexes of pyridine-modified polyamidoamine (PAMAM) dendrimers. The cooperative behavior of the metal ions was examined by preparing (G2-G6)-dendri-PAMAM-(Py) n and testing the dendrimers for their ability to reduce oxygen catalytically in the presence of several Cu 2+ ion concentrations. Spectrophotometric measurements during the reactive metallic ion titrations revealed that the maximum numbers of reactive Cu 2+ ions available for O 2 reduction were 4.8, 7.6, 22.2, 57.3, and 81.7 in each of the second-to sixth-generation (G2-G6) dendrimer complexes, respectively. An analysis revealed

Affiliations [a] and [c] in the original article [1] are erroneous; the correct affiliations are given below.The Authors