A Hydrothermal reaction of MoO 3, NiCl 2·6H 2O, WO 3 and H 2O with a molar ratio of 1∶0.6∶1∶83.3 gives a rhombic-shaped black crystal [NiMo 12O 40H 10{Ni(H 2O) 3} 4]. It crystallizes in a tetragonal system wit...A Hydrothermal reaction of MoO 3, NiCl 2·6H 2O, WO 3 and H 2O with a molar ratio of 1∶0.6∶1∶83.3 gives a rhombic-shaped black crystal [NiMo 12O 40H 10{Ni(H 2O) 3} 4]. It crystallizes in a tetragonal system with space group I4 1/amd and unit cell parameters a=b=1.518 4(2) nm, c=3.082 9(6) nm, Z=4, V=7.108(2) nm 3, R=0.067 1, wR=0.217 8. The compound possesses a four-capped Keggin structure. The structure of the Keggin- [NiMo 12O 40H 10] 8- consists of twelve MoO 6 octahedrons and a NiO 4 tetrahedron on the center. Four [Ni(H 2O) 3] 2+ at the cap positions are linked to Keggin-structure by three μ 3-O, respectively. The calculation of bond valence shows that the oxidation state of Mo in the compound is +5.展开更多
A new complex[Ni(en) 2V 6O 14] n was hydrothermally synthesized and characterized by 2-dimensional vanadium oxide framework pillared by Ni(en) 2 group. Single crystal X-ray analysis indicates that this compound crysta...A new complex[Ni(en) 2V 6O 14] n was hydrothermally synthesized and characterized by 2-dimensional vanadium oxide framework pillared by Ni(en) 2 group. Single crystal X-ray analysis indicates that this compound crystallizes in monoclinic system, space group P2 1/c with a= 0.892 17(18) nm, b= 1.711 1(3) nm, c=0.662 73(13) nm, β=111.58(3)°, V=0.940 8(3) nm 3, Z=2, D c= 2.501 g/cm 3, R=0.042 3, wR=0.060 9, S=1.006.展开更多
文摘A Hydrothermal reaction of MoO 3, NiCl 2·6H 2O, WO 3 and H 2O with a molar ratio of 1∶0.6∶1∶83.3 gives a rhombic-shaped black crystal [NiMo 12O 40H 10{Ni(H 2O) 3} 4]. It crystallizes in a tetragonal system with space group I4 1/amd and unit cell parameters a=b=1.518 4(2) nm, c=3.082 9(6) nm, Z=4, V=7.108(2) nm 3, R=0.067 1, wR=0.217 8. The compound possesses a four-capped Keggin structure. The structure of the Keggin- [NiMo 12O 40H 10] 8- consists of twelve MoO 6 octahedrons and a NiO 4 tetrahedron on the center. Four [Ni(H 2O) 3] 2+ at the cap positions are linked to Keggin-structure by three μ 3-O, respectively. The calculation of bond valence shows that the oxidation state of Mo in the compound is +5.
文摘A new complex[Ni(en) 2V 6O 14] n was hydrothermally synthesized and characterized by 2-dimensional vanadium oxide framework pillared by Ni(en) 2 group. Single crystal X-ray analysis indicates that this compound crystallizes in monoclinic system, space group P2 1/c with a= 0.892 17(18) nm, b= 1.711 1(3) nm, c=0.662 73(13) nm, β=111.58(3)°, V=0.940 8(3) nm 3, Z=2, D c= 2.501 g/cm 3, R=0.042 3, wR=0.060 9, S=1.006.
