过渡金属取代的钨铝杂多配合物的制备、表征和性质  

Synthesis, Characterization and Properties of Transition Elements Substituted Aluminoheteropolytungstates

作　　者：苏占华[1] 徐学勤[1] 马慧媛[1] 唐晓梅[1] 周百斌[1] 

机构地区：[1]哈尔滨师范大学化学系,哈尔滨150080

出　　处：《无机化学学报》2005年第5期647-652,共6页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.20371014);黑龙江省教育厅科研项目(No.10531070);哈尔滨市学科后备带头人基金(No.2002AFXXJ050)资助。

摘　　要：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K4,6,7[AlM(OH2)W11O39]·xH2O(M=V5+、Cr3+、Mn2+、Fe3+、Co2+、Ni2+、Cu2+、Zn2+、Cd2+)。采用IR、UV、XRD、183W和27AlNMR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。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,K-6,K-7[AlM(OH2)W11O39]• xH(2)O (M=V5+, Cr3+, Mn2+, Fe3+, Co2+, Ni2+, Cu2+, Zn2+, Cd2+) by ICP and TG. Their structures were characterized by IR, UV, XRD, W-183 NMR and Al-27 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.

关 键 词：杂多配合物 过渡金属 表征 Keggin结构 制备 氧化还原过程 铝 钨 Cr^3+ Mn^2+ Fe^3+ CO^2+ Ni^2+ Cu^2+ Zn^2+ ^27AL 循环伏安法 过渡元素 中心原子 性质研究 热稳定性 设计法 ICP 化学式 XRD NMR 不可逆 顺磁性 磁化率 

分 类 号：O641.4[理学—物理化学] TS190.5[理学—化学]