Abstract:

In the first part of this study, a computer aided EPR anal. was performed to intensively study the Cu(II) complexation behavior of different dendrimers: (a) a series of PPI dendrimers ranging up to the fifth generation that had either a dense maltose or maltotriose shell; (b) sulfonated or carboxylated carbosilane dendrimers; (c) self-assembling amine- terminated dendrons. The Cu(II) coordination and symmetry of the generated complexes depend on the dendrimer chem. structure, the functionalization in the periphery, dendrimer generation and the ratio of the copper and dendrimer concns. As generation increased, the glycodendrimers showed (a) increased nitrogen coordination in a axial symmetry, due to the increased no. of nitrogen sites in the dendrimer interior, and (b) a rhombic structure which forms in the congested dendrimer periphery where the sugar units are also able to coordinate the copper ions. [on SciFinder(R)]