The title complex was prepared from self-assembly reaction of La(NO3)3(6H2O, Zn(NO3)2(6H2O, m-cyanobenzoic acid (m-CNC6H4COOH) and pyridine (Py) in refluxing ethanol and its structure was determined by single-...The title complex was prepared from self-assembly reaction of La(NO3)3(6H2O, Zn(NO3)2(6H2O, m-cyanobenzoic acid (m-CNC6H4COOH) and pyridine (Py) in refluxing ethanol and its structure was determined by single-crystal X-ray diffraction. Crystallographic data: C94H62N12La2O22Zn2, Mr = 2120.12, triclinic space group P, a = 13.2219(5), b = 13.2713(5), c = 14.1987(6) ?, (???69.156(1), ( = 84.034(1), ( = 89.400(1) (, V = 2314.9(2) ?3, Z = 1, Dc = 1.521 g/cm3, F(000) = 1060, ( (MoK() = 14.94 cm-1, the final R = 0.043 and wR = 0.117 for 6381 unique reflections with I > 2((I). Crystal structure determination shows that the neighboring lanthanum(III) and zinc(II) ions are bridged by three bidentate m-cyanobenzonate ligands in the syn-syn fashion to form a pair of dinuclear [LaZn(m-CNC6H4COO)3(Py)(C2H5OH)] subunits, being linked together by two bidentate and two tridentate m-cyanobenzonate groups in the syn-syn and syn-anti modes, respectively, to construct a tetranuclear La-Zn complex [La2Zn2(m-CNC6H4COO)10(Py)2(C2H5OH)2].展开更多
The H6P2W18O62/TiO2composite catalyst was prepared by the combination of nonionic surfactant C18H37(OCH2CH2)10OH(Brij-76)as the template and the sol-gel method.As-synthesized composite was characterized by FT-TR,SEM,N...The H6P2W18O62/TiO2composite catalyst was prepared by the combination of nonionic surfactant C18H37(OCH2CH2)10OH(Brij-76)as the template and the sol-gel method.As-synthesized composite was characterized by FT-TR,SEM,N2 absorption-desorption and NH3-TPD.The results showed that the composite H6P2W18O62/TiO2 was mesoporous material(ca.3.3 nm),and large surface area(99.78 m2/g).Additionally,the aggregation of TiO2 particles was effectively inhibited,and the surface acidity was increased substantially.The photocatalytic elimination of monochlorobenzene was used as model reaction to evaluate the photocatalytic activity of the composite catalyst under visible light separately.Photocatalytic experimental results showed that the composite H6P2W18O62/TiO2 can effectively degradate monochlorobenzene.展开更多
基金the Natural Science Foundation of China, Fujian Province and Chinese Academy of Sciences.
文摘The title complex was prepared from self-assembly reaction of La(NO3)3(6H2O, Zn(NO3)2(6H2O, m-cyanobenzoic acid (m-CNC6H4COOH) and pyridine (Py) in refluxing ethanol and its structure was determined by single-crystal X-ray diffraction. Crystallographic data: C94H62N12La2O22Zn2, Mr = 2120.12, triclinic space group P, a = 13.2219(5), b = 13.2713(5), c = 14.1987(6) ?, (???69.156(1), ( = 84.034(1), ( = 89.400(1) (, V = 2314.9(2) ?3, Z = 1, Dc = 1.521 g/cm3, F(000) = 1060, ( (MoK() = 14.94 cm-1, the final R = 0.043 and wR = 0.117 for 6381 unique reflections with I > 2((I). Crystal structure determination shows that the neighboring lanthanum(III) and zinc(II) ions are bridged by three bidentate m-cyanobenzonate ligands in the syn-syn fashion to form a pair of dinuclear [LaZn(m-CNC6H4COO)3(Py)(C2H5OH)] subunits, being linked together by two bidentate and two tridentate m-cyanobenzonate groups in the syn-syn and syn-anti modes, respectively, to construct a tetranuclear La-Zn complex [La2Zn2(m-CNC6H4COO)10(Py)2(C2H5OH)2].
文摘The H6P2W18O62/TiO2composite catalyst was prepared by the combination of nonionic surfactant C18H37(OCH2CH2)10OH(Brij-76)as the template and the sol-gel method.As-synthesized composite was characterized by FT-TR,SEM,N2 absorption-desorption and NH3-TPD.The results showed that the composite H6P2W18O62/TiO2 was mesoporous material(ca.3.3 nm),and large surface area(99.78 m2/g).Additionally,the aggregation of TiO2 particles was effectively inhibited,and the surface acidity was increased substantially.The photocatalytic elimination of monochlorobenzene was used as model reaction to evaluate the photocatalytic activity of the composite catalyst under visible light separately.Photocatalytic experimental results showed that the composite H6P2W18O62/TiO2 can effectively degradate monochlorobenzene.
基金Project supported by the National Natural Science Foundation of China(Nos.21261020,21271102)the Scientific and Technological Landing Project of Higher Education of Jiangxi Province(No.KJLD12094)the Science and Technology Research Project of Key Laboratory of Higher Institutions of Ji -angxi Province(No.GJJ12704)~~