钒磷酸盐(NH3CH2CH2NH2)[VOPO4]的水热合成和结构表征

标题化合物是在反应物摩尔比为V₂O₅∶H₃PO₄∶H₂NCH₂CH₂NH₂∶H₂O＝0.55∶4∶3.6∶265时, 175 ℃水热反应5 d合成的. 其结构特点是: 钒八面体VO₅N]共用角顶的氧形成“之”字型链, 链间由PO₄]共角顶连接成层; 乙二胺分子的一个N直接与V配位, 并伸向层间. 相邻层间存在强氢键. 晶体学数据: 单斜晶系, P2₁/c (No. 14), a＝0.92108(2) nm, b＝0.72851(1) nm, c＝0.98204(2) nm, β＝101.269(7)°, V＝0.6462(4) nm³, Z＝4, D_c＝2.303 g?cm^－3, R₁＝0.0417, wR₂＝0.0999.

Hydrothermal Synthesis and Structural Characterization of Lamellar Vanadium Phosphate [NH3CH2CH2NH2][VOPO4]

The title compound was synthesized from the hydrothermal reaction of V₂O₅, H₃PO₄, H₂NCH₂CH₂NH₂ and H₂O in the molar ratio of 0.55∶4∶3.6∶265 at 175 ℃ for 5 d. The structure contains layers built from chains of trans corner-shared VO₅N] octahedron that are interconnected by PO₄] tetrahedron. The 2-aminoethylaminium cation is bonded through the nitrogen to the vanadium site as a monodentate ligand. Strong hydrogen bonds hold the layers together. Crystal data: monoclinic, space group P2₁/c (No. 14), a＝0.92108(2) nm, b＝0.72851(1) nm, c＝0.98204(2) nm, β＝101.269(7)°, V＝0.6462(4) nm³, Z＝4, D_c＝2.303 g?cm^－3, R₁＝0.0417, wR₂＝0.0999.