A new HPAs H20[P8W60Ta12(H2O)4(OH)8O236]·125H2O (H-1) which comprises a Ta/W mixed addenda heteropolyanion, 20 protons, and 125 crystalline water molecules has been prepared through ion-exchange method. The structure and properties of H-1 have been explored in detail. AC impedance measurements indicate that H-1 is a good solid state proton conducting material at room temperature with a conductivity
采用离子交换法制备了由Ta/W混合附加杂多阴离子、20个质子和125个结晶
水分子组成的新型HPA H20[P8W60Ta12(
H2O)4(OH)8O236]·125 (H-1)。H-1的结构和性质已被详细探索。交流阻抗测量表明,H-1 在室温下是一种良好的固态质子传导材料,电导率为 7.2×10-3 S cm-1(25 °C,30% RH)。H-1的循环伏安图表明了对
亚硝酸盐还原的电催化活性。CH3CN中H-1的Hammett酸度常数H0为-2.91,是目前已知HPA中最强的。相对地,H-1对
缩醛反应表现出优异的催化活性。