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81.
A novel Cu(II)-2,2'-bipy-supported (bipy = bipyridine) mixed valence decatungstate, [Cu(2,2'-bipy)2]2Na2W6^VW4^VIO30·2H2O 1, has been synthesized and structurally characterized by X-ray analysis. The crystal of 1 is of triclinic, space group P1^- with a= 10.9393(10), b = 12.0492(2), c = 12.3783(2)A, a = 80.631(10), β= 70.226(10), γ= 72.329(9)^o, V = 1459.64(4)A^3, Z = 1, Dc = 3.582 g/cm^3, F(000) = 1404, R = 0.0553 and wR = 0.1242 for 4607 observed reflections (I 〉 2σ(I)). The EPR spectrum of 1 indicates that its unpaired electrons are placed in the dx2-y2 orbital of the ground state of Cun. Furthermore, compound 1 shows an antiferromagnetic interaction. 相似文献
82.
A new one-dimensional(1D) coordination polymer [Zn(MMTA)2]n(MMTA=5-mercapto-l-methyl-tetrazole) was synthesized under solvothermal conditions and characterized by single crystal X-ray diffraction. This compound crystallizes in the monoclinic space group C2/c, with cell parameters: a=1.4938(7) nm, b=1.3599(5) nm, c=1.2180(4) nm, fl=120.84(3)^*, V=2.1243(2) nm^3, and Z=8. The deprotonated HMMTA molecule as a/a2-1igand links the zinc center, forming ID chains, which are luther linked by weak C--H...N hydrogen bonds, forming a three-dimensional supramolecular framework. The compound exhibits intense photoluminescence at room temperature. On the basis of the results of TG/DTA analyses, the structure is thermally stable up to -280 ℃. 相似文献
83.
LIN Xin-Rong CHEN Jian-Xin ZHANG Wen-Jie LI Zhong-Shui LAN Ting-Yan ZHU Mei-Ping LI Ai-Ke 《结构化学》2008,27(9):1144-1148
A new infinite three-dimensional framework structure of the title compound [H6Mo^VI8O27]·3C4N2H10 has been synthesized under mild hydrothermal conditions and characterized by elemental analyses, IR, fluorescent spectra and single-crystal X-ray diffraction. C12H36Mo8N6O27 crystallizes in the triclinic system, space group P1^- with a = 8.820(3), b = 9.534(3), c = 10.993(4)A, α= 99.985(17), β = 106.65(2), γ= 101.650(14)°,V = 840.6(5)A^3, Mr = 1463.99, Z = 1, Dc = 2.892 g/cm^3,μ = 2.993 mm^-1, F(000) = 702, the final R = 0.0676, wR = 0.1920 and S = 1.074 for 2196 observed reflections with I 〉 2σ(I). The title compound exhibits a novel infinite three-dimensional (3D) framework composed of a [H6Mo^VI8O27] subunit and three dissociated piperazine fragments. The complex exhibits two strong fluorescent emission bands at ca. 417 and 440 nm (λex = 378nm) in the solid state at room temperature. 相似文献