Three new silver alkylenediphosphonates, [Ag2（HO3PCH2CH2CH2CH2PO3H）] 1, [Ag4（O3PCH2CH2CH2CH2PO3）] 2 and [Ag4（O3PCH2CH2CH2PO3（H2O）] 3, have been hydrotherreally synthesized and characterized by X-ray single-crys...Three new silver alkylenediphosphonates, [Ag2（HO3PCH2CH2CH2CH2PO3H）] 1, [Ag4（O3PCH2CH2CH2CH2PO3）] 2 and [Ag4（O3PCH2CH2CH2PO3（H2O）] 3, have been hydrotherreally synthesized and characterized by X-ray single-crystal and powder diffraction, elemental analyses, IR and thermogravimetric analyses （TGA）. The structures of these compounds are all threedimensional pillar-like open-frameworks with 18-membered [Ag2O4P4C8] channels for compound 1 and 2, and 16-member [Ag2O4P4C6] channels for compound 3. Both 2 and 3 contain interesting twodimensional Ag（Ⅰ） networks based on Ag...Ag interactions. 1,4-Butylene- and 1,3-propylene diphosphonate groups of 2 and 3 bond the first and second maximum metal atoms among metal organodiphosphonates with linking sixteen and fifteen silver（Ⅰ） atoms, respectively. In addition, the coordinated water molecules of 3 can be reversibly removed and recovered.展开更多
Magnetically modified Fe-Al pillared bentonite（Fe3O4/ Fe-Al-Bent） was prepared via chemical co-precipitation method and characterized by powder X-ray diffraction（XRD）, Brunauer-EmmettTeller（BET）, Fourier transfo...Magnetically modified Fe-Al pillared bentonite（Fe3O4/ Fe-Al-Bent） was prepared via chemical co-precipitation method and characterized by powder X-ray diffraction（XRD）, Brunauer-EmmettTeller（BET）, Fourier transform infrared spectroscopy（FTIR） and scanning electron microscopy（SEM）. A series of experiments were carried out to investigate the degradation of Orange II by the obtained heterogeneous catalysts in the presence of H2O2. The experimental result indicated that the synthetic materials had a high catalytic activity and good reusability.展开更多
研究了一种可用于脂肪酸甲酯环氧化的类水滑石催化剂.采用共沉淀法合成类水滑石[Mg1-xAlx(OH)2]x+-(NO3-)x mH2O,通过离子交换法制备出一种新的柱撑水滑石2 31 2[Mg-+x A l x+(O H)]x+312 40/3[PW O]x-mH2O化合物,并由XRD,FT-IR,Raman,...研究了一种可用于脂肪酸甲酯环氧化的类水滑石催化剂.采用共沉淀法合成类水滑石[Mg1-xAlx(OH)2]x+-(NO3-)x mH2O,通过离子交换法制备出一种新的柱撑水滑石2 31 2[Mg-+x A l x+(O H)]x+312 40/3[PW O]x-mH2O化合物,并由XRD,FT-IR,Raman,ICP和UV-Vis进行了表征.用制备的类水滑石应用于无羧酸环境下的催化脂肪酸甲酯环氧化反应,结果表明,柱撑水滑石较插层前转化率和选择性都有了明显的提高.考察了反应温度、反应时间、催化剂重复使用等因素对环氧化反应的影响,在60℃时反应16 h,转化率和选择性分别达到56.1%和59.4%,催化剂使用4次后重复使用率仍高于90%.对催化剂催化环氧化的机理进行了初步的探讨.展开更多
基金This research was supported by grants from the State Key Laboratory of Structure Chemistry, Fujian Institute of Research on the Structure of Matter, the National Ministry of Science and Technology of China (001CB1089), Chinese Academy of Sciences (CAS), the National Science Foundation of China (20273073, 20333070 and 90206040), the National Science Foundation of Fujian Province (2003J042, 2004J041, Z0513022 and 2004HZ01-1)
文摘Three new silver alkylenediphosphonates, [Ag2（HO3PCH2CH2CH2CH2PO3H）] 1, [Ag4（O3PCH2CH2CH2CH2PO3）] 2 and [Ag4（O3PCH2CH2CH2PO3（H2O）] 3, have been hydrotherreally synthesized and characterized by X-ray single-crystal and powder diffraction, elemental analyses, IR and thermogravimetric analyses （TGA）. The structures of these compounds are all threedimensional pillar-like open-frameworks with 18-membered [Ag2O4P4C8] channels for compound 1 and 2, and 16-member [Ag2O4P4C6] channels for compound 3. Both 2 and 3 contain interesting twodimensional Ag（Ⅰ） networks based on Ag...Ag interactions. 1,4-Butylene- and 1,3-propylene diphosphonate groups of 2 and 3 bond the first and second maximum metal atoms among metal organodiphosphonates with linking sixteen and fifteen silver（Ⅰ） atoms, respectively. In addition, the coordinated water molecules of 3 can be reversibly removed and recovered.
基金Funded by the Specialized Research Fund for the Doctoral Program of Higher Education of China(20114219110002)the Natural Science Foundation of Hubei Province(Nos.2014CFB810&2014CFB812)
文摘Magnetically modified Fe-Al pillared bentonite（Fe3O4/ Fe-Al-Bent） was prepared via chemical co-precipitation method and characterized by powder X-ray diffraction（XRD）, Brunauer-EmmettTeller（BET）, Fourier transform infrared spectroscopy（FTIR） and scanning electron microscopy（SEM）. A series of experiments were carried out to investigate the degradation of Orange II by the obtained heterogeneous catalysts in the presence of H2O2. The experimental result indicated that the synthetic materials had a high catalytic activity and good reusability.
