The La-Ni complex oxide catalyst was prepared by solid state reactions under microwave.The structure and reducibility of the catalyst were characterized by using TG-DTA,XRD,TEM and TPR methods.At the same time the cat...The La-Ni complex oxide catalyst was prepared by solid state reactions under microwave.The structure and reducibility of the catalyst were characterized by using TG-DTA,XRD,TEM and TPR methods.At the same time the catalytic activity of oxidative dehydrogenation of ethylbenzene to styrene with carbon dioxide over the complex oxide nanoparticle was investigated.The results show that the product is K2NiF4 nanoparticles,and the size is 13 nm.The complex oxide sample had high activity for the oxidative dehydrogenation of ethylbenzene to styrene.展开更多
A lead(II) coordination polymer,{[Pb2(butca)(H2O)2](H2O)2}n (1),has been synthe-sized by the hydrothermal reaction of Pb(OH)2 and 1,2,3,4-butanetetracarboxylic acid (H4butca) at 160 °C.Single-crystal X-ray analys...A lead(II) coordination polymer,{[Pb2(butca)(H2O)2](H2O)2}n (1),has been synthe-sized by the hydrothermal reaction of Pb(OH)2 and 1,2,3,4-butanetetracarboxylic acid (H4butca) at 160 °C.Single-crystal X-ray analyses reveal that it crystallizes in monoclinic,space group P21/c with a=7.616(5),b=7.584(4),c=12.314(7),β=105.595(12)o,V=685.0(7)3,Z=4,C8H14O12Pb2,Mr=716.57,Dc=3.474 g/cm3,μ=24.610 mm-1,F(000)=644,the final R=0.0381 and wR=0.1176 for 1465 observed reflections with I > 2σ(I).The complex presents a 2D-layered structure featuring two different types of rings,and has a (4,36)topology based on Pb and butca4-nodes.In solid state,complex 1 shows photoluminescence with the maximum emission intensity at 468 nm under 286 nm excitation.展开更多
Self-assembly of Ag(I) nitrate, 1,3-bis(4-pyridyl)propane (bpp) and phthalic acid monopotassium salt (KHphth) in CH3OH-H2O solution produced the title complex, {[Ag(bpp)]2(Hphth)(NO3)·(H2O)2}n, which was characte...Self-assembly of Ag(I) nitrate, 1,3-bis(4-pyridyl)propane (bpp) and phthalic acid monopotassium salt (KHphth) in CH3OH-H2O solution produced the title complex, {[Ag(bpp)]2(Hphth)(NO3)·(H2O)2}n, which was characterized by single-crystal X-ray diffraction, elemental analysis, IR spectrum, and photoluminescent spectrum. Single-crystal X-ray analysis revealed that the complex crystallizes in a monoclinic system, space group P21/c, with a = 15.4174(5), b = 8.6398(2), c = 25.2466(8) , β = 91.072(1)o, V = 3362.34(17) 3, Z = 4, C34H37N5O9Ag2, Mr = 875.43, Dc = 1.729 g/cm3, μ = 1.228 mm-1, F(000) = 1768, the final R = 0.0749 and wR = 0.1580 for 5754 reflections with I > 2σ(I). The Ag atom is coordinated by two N atoms from two bpp molecules in an approximately linear geometry. The Ag(I) ions are linked by the bpp molecules to form one-dimensional zigzag chains propagating along the c axis. The Hphth- and nitrate counter-ions are bridged by solvent water molecules through hydrogen bonds to generate a one-dimensional chain extending along the b axis. Electrostatic interactions between cations and anions, extensive hydrogen bonds and π-π interactions are responsible for the three-dimensional supramolecular structure. In the solid state, the compound exhibits blue photoluminescence with the maximum at 436 nm upon excitation at 344 nm.展开更多
文摘The La-Ni complex oxide catalyst was prepared by solid state reactions under microwave.The structure and reducibility of the catalyst were characterized by using TG-DTA,XRD,TEM and TPR methods.At the same time the catalytic activity of oxidative dehydrogenation of ethylbenzene to styrene with carbon dioxide over the complex oxide nanoparticle was investigated.The results show that the product is K2NiF4 nanoparticles,and the size is 13 nm.The complex oxide sample had high activity for the oxidative dehydrogenation of ethylbenzene to styrene.
基金Supported by the Education Department of Jiangxi Province (No. 2007-125)the Initial Fund for Doctors from Jiangxi Normal University
文摘A lead(II) coordination polymer,{[Pb2(butca)(H2O)2](H2O)2}n (1),has been synthe-sized by the hydrothermal reaction of Pb(OH)2 and 1,2,3,4-butanetetracarboxylic acid (H4butca) at 160 °C.Single-crystal X-ray analyses reveal that it crystallizes in monoclinic,space group P21/c with a=7.616(5),b=7.584(4),c=12.314(7),β=105.595(12)o,V=685.0(7)3,Z=4,C8H14O12Pb2,Mr=716.57,Dc=3.474 g/cm3,μ=24.610 mm-1,F(000)=644,the final R=0.0381 and wR=0.1176 for 1465 observed reflections with I > 2σ(I).The complex presents a 2D-layered structure featuring two different types of rings,and has a (4,36)topology based on Pb and butca4-nodes.In solid state,complex 1 shows photoluminescence with the maximum emission intensity at 468 nm under 286 nm excitation.
基金Supported by the Education Department of Jiangxi Province (No. 2007-125)the Initial Fund for Doctors from Jiangxi Normal University
文摘Self-assembly of Ag(I) nitrate, 1,3-bis(4-pyridyl)propane (bpp) and phthalic acid monopotassium salt (KHphth) in CH3OH-H2O solution produced the title complex, {[Ag(bpp)]2(Hphth)(NO3)·(H2O)2}n, which was characterized by single-crystal X-ray diffraction, elemental analysis, IR spectrum, and photoluminescent spectrum. Single-crystal X-ray analysis revealed that the complex crystallizes in a monoclinic system, space group P21/c, with a = 15.4174(5), b = 8.6398(2), c = 25.2466(8) , β = 91.072(1)o, V = 3362.34(17) 3, Z = 4, C34H37N5O9Ag2, Mr = 875.43, Dc = 1.729 g/cm3, μ = 1.228 mm-1, F(000) = 1768, the final R = 0.0749 and wR = 0.1580 for 5754 reflections with I > 2σ(I). The Ag atom is coordinated by two N atoms from two bpp molecules in an approximately linear geometry. The Ag(I) ions are linked by the bpp molecules to form one-dimensional zigzag chains propagating along the c axis. The Hphth- and nitrate counter-ions are bridged by solvent water molecules through hydrogen bonds to generate a one-dimensional chain extending along the b axis. Electrostatic interactions between cations and anions, extensive hydrogen bonds and π-π interactions are responsible for the three-dimensional supramolecular structure. In the solid state, the compound exhibits blue photoluminescence with the maximum at 436 nm upon excitation at 344 nm.
