过渡金属取代的钨铝杂多配合物的制备、表征和性质

用分步设计法合成了以铝为中心原子的过渡元素与钨的三元杂多配合物,经ICP、TG分析确定其化学式为K_4，6，7AlM(OH₂)W₁₁O₃₉]·xH₂O(M=V⁵⁺、Cr³⁺、Mn²⁺、Fe³⁺、Co²⁺、Ni²⁺、Cu²⁺、Zn²⁺、Cd²⁺)。采用IR、UV、XRD、¹⁸³W和²⁷Al NMR等对配合物的结构进行了表征,表明配合物具有Keggin结构；循环伏安法对该系列配合物的氧化还原性质研究表明,其氧化还原过程为不可逆的两电子还原,配合物的磁化率测试均表现为顺磁性,还对其热稳定性进行了讨论。

Synthesis, Characterization and Properties of Transition Elements Substituted Aluminoheteropolytungstates

Tri-basic heteropolytungstates containing transition elements with Al as central atom have been synthesized by stepwise design. The molecular formules were confirmed as K_4,6,7AlM(OH₂)W₁₁O₃₉]·xH₂O(M=V⁵⁺, Cr³⁺, Mn²⁺, Fe³⁺, Co²⁺, Ni²⁺, Cu²⁺, Zn²⁺, Cd²⁺) by ICP and TG. Their structures were characterized by IR, UV, XRD,¹⁸³W NMR and ²⁷Al NMR. The results show that the complexes were of Keggin structure. The redox behaviors of these complexes were investigated by cyclic voltammetry as irreversible processes. The magnetic data suggest that the complexes are all paramagnetic. The thermostabilities for the complexes are also discussed.