The title compound [Ni（DMF）6]3[PMo12O40]2（DIE = N,N＇-dimethyllformamide） was synthesized and structurally characterized by elemental analysis, IR, UV and single crystal X-ray diffraction. It crystallized in the trigonal system, space group R-3, a = 1.591 7（2） nm, b = 1.591 7（2） nm, c = 3.226 9（7） nm, α = 90.00^＊, β=90.00^＊, γ= 120.00^＊, V=7.080（2） nm^3, Z=3 and R1 =0.083 7. It consists of two Keggin polyoxometalates [PMo12O40]3- linked together with three [Ni（DMF）6]^2＋ cations through hydrogen bonding interaction.
A new 3D rare-earth coordination polymer[Ce 2(H 2btc)(btc)(H 2O) 2] n (1) was hydrothermally synthesized and its structure was characterized by the single crystal X-ray diffraction. Compound 1 crystallizes in a triclinic crystal system,space group P 1 with a =0.641 17(13) nm, b = 0.939 41(19) nm , c =0.957 97(19) nm, α =103.888(17)°, β =74.57(3)°, γ =76.71(3)°, V = 0.540 98(19) nm 3 , Z=1,\{R=\}0.026 4,wR 2 =0.077 9. The three-dimensional compound 1 is built by linking one crystallographically independent nine-coordination Ce(Ⅲ) subunit through the btc and the H 2btc ligands. Each nine-coordinate Ce(Ⅲ) unit is a distorted tricapped trigonal prism,of which eight oxygen atoms belong to six different carboxylate groups of btc or H 2btc and a water molecule,with the Ce(Ⅲ)—O bond lengths ranging from 0.240 3(3) nm to 0.263 6(3) nm.
The title compound [ Mn5 （ H2PO4 ）2 （ PO4 ）2 （ H20）4 ] was hydrothermally synthesized in the presence of calix[4]arene-p-tetrasulfonate. The title compound was structurally characterized by X-ray single crystal diffraction. It crystallizes in the monoclinic space group C2/c with α = 1.762 9（4） nm, b = 0.913 44（18） nm, c=0.94977（19） nm, β=96.52（3）°, V=1.5195（5） nm^3, Z=4 and R1=0.0283, and exhibits a three-dimensional framework and channel structure. It was proposed that calixarene can act as template during the formation of the title compound because calixarene can bind Mn^2＋ through second-sphere coordination.
A novel and efficient photocatalyst, CdIn2S4, was simply prepared by a programmed temperature hydrothermal method. The product had a nanometer size （10-15 nm） and strong absorption in the range of 200 to 580 nm, and it exhibited visible-light photocatalytic activity to decompose dye methyl orange in aqueous system.
Preparation method of photocatalyst, using TiCl4 and SnCl2 as raw material and photocatalytic activity of nano-scaled core-shell Sn^2＋ -doped titania photocatalyst was studied in this paper. The as-prepared samples were studied by UV-Vis, XRD, XPS, TEM. The particles of Sn^2＋-doped TiO2 photocatalyst, calcined from 150 to 600 ℃ for 5 h, possesses narrow particle size distribution and the sample was composed of anatase phase. Its photocatalytic efficiency was investigated by UV irradiation.
