Abstract: The transition-metal ion was introduced into the Keggin structure in terms of the degradation of heteropoly acid.The compound was intercalated into the layered region of the hy-drotalcitelike[Zn,Al(NO₃^-)] in the microwave field.It is the first time to prepare the hydrotal-cite pillared with PCuMo₁₁^5- heteropolyanion.The product possesses a regular layered structure and a good crystallinity.The NO₃^- ion existing in the layered region was substituted completely by heteropolyanion.The heteropoly compound intercalated in the layered region of hydrotalcite still has a strong ESRsignal.The experiment results show that Cu with C_4v symmetry distributes uniformly in the Keggin structure and exists in a cubic cone field with pentadentate.

Key words: Heteropolycompound, Intercalation, Pillared hydrotalcite