The mesoporous silica nanosphere supported palladium nanocluster was synthesized through a simple impregnation method and well characterized. The as prepared catalyst shows excellent catalytic performance in tandem oxidation process (TOP) of alcohol and phosphorous ylide, which provides an efficient access to α,β-unsaturated esters with high yields utilizes 1 atmosphere of molecular oxygen as sole oxidant. This work represents the first example of atomically precise palladium nanocluster catalyzed tandem oxidation process of alcohol and phosphorous ylide and is expected to open new horizons for nanoclusters in the tandem reactions.

中文翻译：

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原子精确的钯纳米簇催化醇和磷酰化物的串联氧化过程：易于获得α，β-不饱和酯

通过简单的浸渍方法合成了介孔二氧化硅纳米球负载的钯纳米簇，并对其进行了很好的表征。所制备的催化剂在醇和亚磷酰的串联氧化过程（TOP）中显示出优异的催化性能，利用1个大分子的分子氧作为唯一氧化剂，可以高效地高效获得α，β-不饱和酯。这项工作代表了原子精确的钯纳米簇催化的醇和磷化磷的串联氧化过程的第一个实例，有望为串联反应中的纳米团簇开辟新的视野。