钯、铱单取代十二钼磷酸盐的制备及性质的研究

Synthesis and Properties of mono Palladium?and Iridium? Substituted Dodecamolybdophosphate

本文报道了Pd 、Ir 取代的十二钼磷酸四丁基铵盐 (α (n Bu4 N) 5[PMo11Pd(OH2 )O39]、α (n Bu4 N) 3[PMo11Ir(OH2 )O39])的制备方法。IR、UV及31P NMR证实产物仍保持Keggin结构 ,并有一个Mo 为Pd 、Ir 所取代。电化学上 ,Ir 取代化合物存在三个清晰的多酸骨架氧化 还原峰而Pd 取代化合物由于电极吸附作用使它的氧化 还原峰无法被观察到。在两个取代化合物的烯烃催化氧化中醇、酮为主要产物。 值得注意的是 ,Pd

The palladium and iridium substituted dodecamolybdophosphates with the general formula(Bu 4N) n[PMo 11 M(OH 2)O 39 ] have been prepared and characterized by IR, UV and 31 P NMR. The cyclic voltammetry measurement in acetonitrile solution revealed that the iridium substituted compounds displayed three reversible framework redox couples, however, no obvious redox peak was found for the palladium derivative, as a result of its strong adsorption on the surface of the electrod. Both substituted compounds served as bifunctional catalysts in the cyclohexene oxidation reaction by molecular oxygen. The main products were cyclohexen 2 ol and cyclohexene 2 one for the iridium substituted compounds, but cyclohexen 2 ol and phenyl ol instead for the palladium derivative.