Syntheses,Structures, and Luminescent Properties of Two Zn~Ⅱ-organic Polymers Based on [Zn(ox)]_n Chains and Different Imidazole Linkers

Hydrothermal reactions of two imidazole derivatives(1,3,5-tib = 1,3,5-tris(1Himidazol-1-yl)benzene, 1,4-bimb = 1,4-bis(1H-imidazol-1-ylmethyl)benzene) and the ZnⅡ cations in the presence of oxalic acid(H2ox) afford two coordination polymers, namely, {[Zn(ox)(1,3,5-tib)]·2(H2O)}n(1) and [Zn1.5(ox)1.5(1,4-bimb)1.5]n(2). Their structures have been determined by single-crystal X-ray diffraction analyses, elemental analyses, IR spectra, and powder X-ray diffraction(PXRD) analyses. Both complexes 1 and 2 are based on the 1D zigzag [Zn(ox)]n chains, and their final structures are controlled by the two different imidazole linkers, which expanded the structure along different directions, finally giving a 3D dia net for 1 and a 2D sql layer for 2. Moreover, the luminescent properties of 1 and 2 have been investigated.     

纳米GaN固体的制备与表征

本研究工作以氯化氨作矿化剂,在350～450℃、15～50MPa的条件下,用氨基钠作为氮的前体,和金属镓反应合成了氮化镓晶体.用X射线衍射、透射电子显微镜、激光拉曼光谱、红外光谱等方法对产物进行表征,结果显示得到的晶体为六方纤锌矿结构,平均粒径为16nm,晶格参数a=0.3215nm,c=0.5223nm.晶体的完整性好、产率高,并探讨了可能的反应机理.     

Synthesis,Crystal Structure,and Topology Analysis of One Novel Interpenetrated 2D Cobalt Coordination Polymer, {[Co(HTCB)(4,4'-btb)]·H_2O}_n

One novel cobalt coordination polymer, {[Co(HTCB)(4,4'-btb)]·H2O}n(1, H3TCB= 1,3,5-tris(4-carboxyphenyl)benzene, 4,4'-btb = 4,4'-bis(1,2,4-triazol-3-yl)biphenyl), has been synthesized and characterized by elemental analysis, IR, powder X-ray diffraction(PXRD), and thermogravimetric(TG) analyses. X-ray diffraction analysis reveals that complex 1 is a 2D 2-fold interpenetrated {44,62}-sql [Co(HTCB)(4,4'-btb)] sheet based on the 1D [Co(HTCB)]n chains and1 D [Co(4,4'-btb)]n chains. The crystal of 1 crystallizes in triclinic, space group P 1 with a =9.529(12), b = 13.914(16), c = 14.906(17), V = 1903(4) 3, Z = 2, C45H34N6CoO7, Mr = 829.71,Dc = 1.448 g/cm3, F(000) = 858 and μ(MoKα) = 0.514 mm-1. The final R = 0.0655 and wR = 0.1136 for 6603 observed reflections with I 2σ(I) and R = 0.1136 and wR = 0.1747 for all data.