The polystyrene（PS） microspheres were prepared from free radical polymerization of styrene by a sol-gel method combined with centrifugal sedimentation. And the ordered macroporous titania was prepared from Ti（BuO）...The polystyrene（PS） microspheres were prepared from free radical polymerization of styrene by a sol-gel method combined with centrifugal sedimentation. And the ordered macroporous titania was prepared from Ti（BuO）4 in ethanol solution using the mentioned PS microspheres as a template, which was removed from titania by calcination at 450 ℃. SEM images revealed the PS template has a three-dimentional ordered structure with particle diameter of ca. 450 nm and the macroporous titania thus obtained has a pore size of ca. 300 nm. XRD showed the macroporous titania has anatase structure.展开更多
Complex [Ag 2(DPYBIM)(dppm)](BF 4) 2·CH 3OH was obtained from the reaction of AgBF 4 and the hetero-armed tripodal ligand DPYBIM [N,N-bis(2-pyridylmethyl)-N-(2-benzimidazolylmethyl)amine] with the participation o...Complex [Ag 2(DPYBIM)(dppm)](BF 4) 2·CH 3OH was obtained from the reaction of AgBF 4 and the hetero-armed tripodal ligand DPYBIM [N,N-bis(2-pyridylmethyl)-N-(2-benzimidazolylmethyl)amine] with the participation of dppm [bis(diphenylphosphino)- methane]. Single crystal X-ray diffraction analysis showed that the crystal belongs to the triclinic space group P1-. The cell parameters are: M r=1135.17, a=1.0619(2) nm, b=1.4246(3) nm, c=1.6767(3) nm, α=91.08(3)°, β=104.04(3)°, γ=101.77(3)°, V=2.4027(8) nm 3, D c=1.569 Mg/m 3, Z=2, F(000)=1140, μ=9.53 cm -1, R=0.057, wR=0.145. In the complex, one of the Ag atoms is linearly coordinated by PN from dppm and the benzimidazolyl group of the tripodal ligand, respectively, while the other is tetrahedrally coordinated by PN 3 where two of the N atoms are from the pyridine arms and one is the amino-N. Two types of intermolecular π...π interactions lead to the 1D infinite "Z"-shaped chain. The complex was characterized by elemental analysis, IR and MS. 31P NMR showed characteristic AA′XX′pattern of two symmetrical multiplets centered at δ=10.07.展开更多
文摘The polystyrene（PS） microspheres were prepared from free radical polymerization of styrene by a sol-gel method combined with centrifugal sedimentation. And the ordered macroporous titania was prepared from Ti（BuO）4 in ethanol solution using the mentioned PS microspheres as a template, which was removed from titania by calcination at 450 ℃. SEM images revealed the PS template has a three-dimentional ordered structure with particle diameter of ca. 450 nm and the macroporous titania thus obtained has a pore size of ca. 300 nm. XRD showed the macroporous titania has anatase structure.
文摘Complex [Ag 2(DPYBIM)(dppm)](BF 4) 2·CH 3OH was obtained from the reaction of AgBF 4 and the hetero-armed tripodal ligand DPYBIM [N,N-bis(2-pyridylmethyl)-N-(2-benzimidazolylmethyl)amine] with the participation of dppm [bis(diphenylphosphino)- methane]. Single crystal X-ray diffraction analysis showed that the crystal belongs to the triclinic space group P1-. The cell parameters are: M r=1135.17, a=1.0619(2) nm, b=1.4246(3) nm, c=1.6767(3) nm, α=91.08(3)°, β=104.04(3)°, γ=101.77(3)°, V=2.4027(8) nm 3, D c=1.569 Mg/m 3, Z=2, F(000)=1140, μ=9.53 cm -1, R=0.057, wR=0.145. In the complex, one of the Ag atoms is linearly coordinated by PN from dppm and the benzimidazolyl group of the tripodal ligand, respectively, while the other is tetrahedrally coordinated by PN 3 where two of the N atoms are from the pyridine arms and one is the amino-N. Two types of intermolecular π...π interactions lead to the 1D infinite "Z"-shaped chain. The complex was characterized by elemental analysis, IR and MS. 31P NMR showed characteristic AA′XX′pattern of two symmetrical multiplets centered at δ=10.07.
