Synthesis, Structures And Photocatalytic Degrada- Tion Of Heterometallic Organic Coordination Polymers Based On Construct Of Uranyl

Recent studies have shown that d and 4f metal-organic coordination polymers have extensive applications in field of catalysis, optical, magnetic, gas adsorption and storage, chiral separation and electrochemical. At first, this paper focuses on the uranyl ion of actinides (5f) as the center. In order to synergistically enhance and build new uranyl heterometallic-organic coordination polymers, the uranyl and transition metal ions were simultaneously introduced into a system. It can improve the diversity of coordination polymer structure and get fantastic properties of optical, electricity, magnetism. Therefore, this paper selected different compositions, structures and properties of metallic compound ions and organic dicarboxylic acids, and let them react with uranyl ions to build d-5f heterometallic organic coordination polymers.In this paper, seven host-guest uranyl heterometallic-organic coordination polymers, three bridging structures of uranyl coordination polymers and a methyl viologen-uranyl hybrid polymer were obtained under hydrothermal conditions. Structure of compound 1,2,3,4,5,10,11 were host-guest. Wherein the host framework of compound 1 and 2 were honeycomb plane of layer, and the host framework of compound 3,4 and 5 were Interpenetrating network. The guests of compound 3 and 11 were organic cation ions, but other guests were metal compounds. Guests were implanted in every hole of host framework and interacted by electrostatic attraction or secondary bond. Structure of compound 6,7 and 9 were bridging, wherein uranyl and unsaturated transition metal compounds are connected into the extensive structure of the compounds by organic ligands containing different ligand points. Compound 8 was methyl viologen-uranyl hybrid polymer, it consists of cation of methyl viologen and anion layer which was consist of uranyl and sulfate.Flexible (aliphatic) dicarboxylic acid was first used to construct the host-guest polymer of uranyl in this paper. While the guest of cation from ammonium ion to metal complex and guest of pure organic cation. The crystal structure of 11 compounds were determined by X-ray single crystal diffraction method, The properties of IR, UV-Vis and fluorescence of compounds have testted and characterized. The photocatalytic degradation of some compounds was also tested.