| Dendritic polymer, a class of new macromolecule, appeared in the middle of eighty years of twenty centuries. Dendrimers have a hyper-branched, well defined and monodisperse structures and can be formed by reiterative reaction sequences starting from smaller molecules named "initiator core". And its molecular weight, size, shape and functional group over surface can be controlled by the reactions and synthetic building blocks used. Great attention has been paid to dendrimers, especially poly(amidoamine) dendrimers, in a number of potential applications in supramobecular chemistry, nanosciences, biology, medicine, catalysis and so on.A novel supramolecular compound [Mo6O19]2-/PAMAM assembled by ionic bonding was synthesized by Poly(amide amine)dendrimer(PAMAM) and [Mo6P19]2- polyanion, and characterized by element analysis, FTIR, UV-Vis absorption, TG/DTA, Fluorescence spectrum. Electrochemical behavior and electrocatalytic activity of the carbon paste electrode(CPE) modified by the title compound was studied in H2SO4 aqueous solution.ZnO nanoparticles were prepared in the presence of generation 3.5 poly (amidoamine) with surface ester groups (G3.5-COOCH3 PAMAM dendrimer) and characterized by TEM, XRD, UV-Vis. The forming mechanism of ZnO nanoparticles was discussed. The degradation of methyl Rhodamine B in aqueous solution was also investigated using ZnO nanoparticles as photochemical catalyst under UV irradiation.ZnO-SnO2 nanocomposite oxides with Zn/Sn molar ratio of 2 were prepared in the presence of poly (amidoamine) dendrimer and characterized by XRD, DRS, EDS, TEM. The degradation of methyl Rhodamine B in aqueous solution was investigated using ZnO-SnO2 nanocomposite oxides as photochemical catalyst under visible light irradiation. Effect of initial concentration of Rhodamine B, amount of catalyst, calcining time,calcining temperature, template concentration and tempate generation on decolour rate were also studied.
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