| 摘 要： | 1 Results Dendrimers are highly branched organic macromolecules with successive layers or "generations" of branch units surrounding a central core.Organic inorganic hybrid versions have also been produced,by trapping metal ions or metal clusters within the voids of the dendrimers.Their unusual,tree-like topology endows these nanometre-sized macromolecules with a gradient in branch density from the interior to the exterior,which can be exploited to direct the transfer of charge and energy from the dendrimer periphery to its core.
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