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在水热条件下,以4,4′-联吡啶-2,2,′6,6′-四羧酸(H4L)、NH4VO3和M nC l2.4H2O为原料,合成一个单核钒配合物[VO2(H2L′).H2O],其中配体(H4L)发生脱羧作用生成新配体4,4′-联吡啶-2,6-二羧酸(H2L′)。对配合物进行红外光谱、元素分析和单晶X-射线衍射分析表明:配合物属单斜晶系,空间群为C 2/c,晶胞参数为:a=0.858 7(10)nm,b=1.545 5(2)nm,c=0.999 6(13)nm;β=91.905(2)°。V(Ⅴ)离子为五配位,处于畸变的三角双锥体配位环境中,配位原子分别是来自一个[HL′]-配体的一个吡啶氮原子和两个羧基氧原子、另外两个氧原子来自[VO2]+。配合物通过氢键作用形成二维网状结构。
Under hydrothermal conditions, a mononuclear vanadium complex was synthesized from 4,4’-bipyridine-2,2 ’, 6,6’-tetracarboxylic acid (H4L), NH4VO3 and MnCl2.4H2O [ VO2 (H2L ’). H2O], in which the ligand (H4L) decarboxylation to generate a new ligand 4,4’-bipyridine-2,6-dicarboxylic acid (H2L’). IR, elemental analysis and single crystal X-ray diffraction analysis showed that the complex belongs to the monoclinic system with space group C 2 / c. The unit cell parameters are as follows: a = 0.858 7 (10) nm, b = 1.545 5 (2) nm, c = 0.999 6 (13) nm; β = 91.905 (2) °. The V (Ⅴ) ions are pentacoordinated and lie in a distorted triangular bipyramidal coordination environment with one pyridine nitrogen atom and two carboxyl oxygen atoms from one [HL ’] - ligand respectively. The other two One oxygen atom is from [VO2] +. Complex formed by hydrogen bonding two-dimensional network structure.