Two new copper complexes based on pyrazole-3-carboxylic acid （H2pca） ligand, Cu（Hpca）2（H2O）2？2H2O （1） and Cu2（pca）2（H2O）4 （2） have been synthesized and fully characterized by single-crystal X-ray diffra...Two new copper complexes based on pyrazole-3-carboxylic acid （H2pca） ligand, Cu（Hpca）2（H2O）2？2H2O （1） and Cu2（pca）2（H2O）4 （2） have been synthesized and fully characterized by single-crystal X-ray diffraction （SXRD）, infrared spectroscopy （IR）, thermal gravity analysis （TGA）, powder X-ray diffraction （PXRD） and elemental analyses. Complex 1 is mononuclear while complex 2 shows a dinuclear structure. Complex 1 crystallizes in the monoclinic system, space group P21/c with Z = 2, a = 6.5591（5）, b = 21.696（2）, c = 4.9486（2） ？, V = 680.94（9） ？3, F（000） = 366, Dc = 1.745 g/cm3, μ = 1.650 mm-1, the final R = 0.0340 and wR = 0.0792. Complex 2 crystallizes in the monoclinic system, space group P21/n with Z = 2, a = 5.1935（4）, b = 9.6052（7）, c = 12.7347（9） ？, V = 634.44（8） ？3, F（000） = 420, Dc = 2.195 g/cm3, μ = 3.404 mm-1, the final R = 0.0305 and wR = 0.0653. The three-dimensional frameworks of two complexes are formed by the O？H？？？O and N？H？？？O hydrogen bonding interactions. Notably, two copper complexes are further used as catalysts in the oxidation of alkylbenzenes using t-butylhydroperoxide （TBHP） as the oxidant and they exhibit excellent catalytic performance （Conv. up to 98.9%, Sele. up to 98.7%）.展开更多
A novel imidazole-functionalized dioxovanadium complex [V2O2（C2O4）（aIM）4] （aIM =1-allylimidazole） was synthesized by the reaction of VO（acac）2 with 1-allylimidazole and fully characterized by single-crystal X-...A novel imidazole-functionalized dioxovanadium complex [V2O2（C2O4）（aIM）4] （aIM =1-allylimidazole） was synthesized by the reaction of VO（acac）2 with 1-allylimidazole and fully characterized by single-crystal X-ray diffraction （SCXRD）,powder X-ray diffraction （PXRD）,X-ray photoelectron spectroscopy （XPS）,Fourier transform infrared spectroscopy （FT-IR） and elemental analyses.Interestingly,the oxalate was in-situ generated from the acetylacetone anion of VO（acac）2 and further coordinated with the vanadium cation and finally complex 1 was achieved.The crystal of complex 1 belongs to the monoclinic system,space group P21/n with a =10.7922（9）,b =10.6296（8）,c =13.2936（11） （A）,μ =0.677 mm^-1,Mr =686.48,V =1516.9（2） A^3,Z =2,Dc =1.503 g/cm^3,F（000） =708,R =0.0543,and wR =0.1517 for 2459 observed reflections with Ⅰ 〉 2σ（Ⅰ）.Notably,complex 1 is further used as catalyst in the oxidation of sulfides using H2O2 as the oxidant and exhibits excellent catalytic performance （conv.up to 95.6%,sele.up to 98.9%）.展开更多
基金supported by the NNSFC(Nos.21401094 and 21501086)the Project of Shandong Province Higher Educational Science and Technology Program(No.J16LC53)the College Students'Science and Technology Innovation Fund(No.CXCY2017028 and CXCY2017037)
文摘Two new copper complexes based on pyrazole-3-carboxylic acid （H2pca） ligand, Cu（Hpca）2（H2O）2？2H2O （1） and Cu2（pca）2（H2O）4 （2） have been synthesized and fully characterized by single-crystal X-ray diffraction （SXRD）, infrared spectroscopy （IR）, thermal gravity analysis （TGA）, powder X-ray diffraction （PXRD） and elemental analyses. Complex 1 is mononuclear while complex 2 shows a dinuclear structure. Complex 1 crystallizes in the monoclinic system, space group P21/c with Z = 2, a = 6.5591（5）, b = 21.696（2）, c = 4.9486（2） ？, V = 680.94（9） ？3, F（000） = 366, Dc = 1.745 g/cm3, μ = 1.650 mm-1, the final R = 0.0340 and wR = 0.0792. Complex 2 crystallizes in the monoclinic system, space group P21/n with Z = 2, a = 5.1935（4）, b = 9.6052（7）, c = 12.7347（9） ？, V = 634.44（8） ？3, F（000） = 420, Dc = 2.195 g/cm3, μ = 3.404 mm-1, the final R = 0.0305 and wR = 0.0653. The three-dimensional frameworks of two complexes are formed by the O？H？？？O and N？H？？？O hydrogen bonding interactions. Notably, two copper complexes are further used as catalysts in the oxidation of alkylbenzenes using t-butylhydroperoxide （TBHP） as the oxidant and they exhibit excellent catalytic performance （Conv. up to 98.9%, Sele. up to 98.7%）.
基金supported by the NNSFC(No.21401094)Project of Shandong Province Higher Educational Science and Technology Program(No.J16LC53)+1 种基金Science and the Technology Development Plans of Liaocheng(No.2014GJH01)the National College Students'Science and Technology Innovation Fund(No.1420800)
文摘A novel imidazole-functionalized dioxovanadium complex [V2O2（C2O4）（aIM）4] （aIM =1-allylimidazole） was synthesized by the reaction of VO（acac）2 with 1-allylimidazole and fully characterized by single-crystal X-ray diffraction （SCXRD）,powder X-ray diffraction （PXRD）,X-ray photoelectron spectroscopy （XPS）,Fourier transform infrared spectroscopy （FT-IR） and elemental analyses.Interestingly,the oxalate was in-situ generated from the acetylacetone anion of VO（acac）2 and further coordinated with the vanadium cation and finally complex 1 was achieved.The crystal of complex 1 belongs to the monoclinic system,space group P21/n with a =10.7922（9）,b =10.6296（8）,c =13.2936（11） （A）,μ =0.677 mm^-1,Mr =686.48,V =1516.9（2） A^3,Z =2,Dc =1.503 g/cm^3,F（000） =708,R =0.0543,and wR =0.1517 for 2459 observed reflections with Ⅰ 〉 2σ（Ⅰ）.Notably,complex 1 is further used as catalyst in the oxidation of sulfides using H2O2 as the oxidant and exhibits excellent catalytic performance （conv.up to 95.6%,sele.up to 98.9%）.
