摘要
PW_9O_(34)^(■-)阴离子可与镧系元素离子反应生成[(LnO)_3(PW_9O_(34))_2]^(15)-型杂多阴离子(Ln=LaCe,Pr,Nd,Sm,Eu,Gd).^(31)PNMR 测定表明,杂多阴离子中的 PW_9O_(34)^(■-)具有 A 型结构;极谱半波电位、还原电子数及红外光谱测试表明,杂多阴离子中的 PW_9O_(34)^(9-)是 A,α型异构体.杂多阴离子在水溶液中稳定的 pH 范围是5.3—8.1,其钾盐的热分解温度约480℃.
The heteropoly complexes K_(15)[(LnO)_3(PW_9O_(34))_2]·xH_2O(Ln=La,Ce,Pr,Nd,Sm,Eu or Gd)have been prepared from the lacunary tungstate Na_8HPW_9O_(34) and characterizedby elemental analysis,vibrational and UV spectroscopies.The ^(31)p NMR determinationestablishes that the PW_9O_(34)^(9-) in the heteropolyanions [(LnO)_3(PW_9O_(34))_2]^(15-) has an A-type structure,and the polarographic data of the heteropolyanions reported here indicatesthat it is an A,a isomer
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
1991年第8期782-787,共6页
Acta Chimica Sinica
基金
国家自然科学基金
