Advantages of Cu(II)-PAMAM complexes as catalyst in aqueous medium in the DMP polymerization: (1) can be carried out under relatively mild conditions; (2) good coupling selectivity of C-O/C-C , high yield rate of polymer polyphenylene ether (PPO),minimal byproduct DPQ; (3)compared with traditional Cu (II)-EDTA complex catalyst, the catalytic activity of Cu (II)-PAMAM complex is greatly improved. Weihai CY Dendrimer Technology Co. Ltd forwards from “Oxidative polymerization of DMP in aqueous mnedia with Cu (II)-PAMAM complex catalyst”, Zhejiang University.