Synthesis and Reactivity of Mixed Transition Metal-Gold and Silver Cluster Compounds

在该项目中，明尼苏达大学的Louis H.Pignolet将研究混合过渡金属-金银簇合物的合成、反应活性和表征。这些金属的双金属合金被认为是重要的商业催化剂。离散簇合物的反应可以作为合金表面的模型，从而有助于理解催化金属表面的基本反应机理。系统合成双金属簇合物的最新进展将被用作形成新的三金属簇合物的起点。重点将放在也含有铂或钯的金银团簇上。将开发一种初步程序，允许第三种未连接的金属添加到现有双金属簇的外缘，并将检查所得到的络合物的催化活性。此外，还将开发一种将金属簇合物连接到二氧化硅和磷化聚合物上的方法，这些聚合物可能作为易于回收的催化剂而具有潜在用途。

In this project supported by the Inorganic, Bioinorganic and Organometallic Chemistry Program, Louis H. Pignolet of the University of Minnesota will investigate the synthesis, reactivity and characterization of mixed transition metal-gold and silver cluster compounds. Bimetallic alloys of these metals are known to be important commercial catalysts. The reactions of discrete cluster compounds may be useful as models for alloy surfaces and therefore in understanding the fundamental reaction mechanisms at the catalytic metal surfaces. Recent advances in the systematic synthesis of bimetallic clusters will be used as a starting point for the formation of new trimetallic clusters. Emphasis will be placed on gold and silver clusters which also contain platinum or palladium. A preliminary procedure which allows a third unligated metal to add to the external edge of an existing bimetallic cluster will be developed and the resulting complexes will be examined for catalytic activity. In addition, a procedure will be developed for the attachment of the metal cluster compounds to silica and phosphinated polymers, which may have potential use as easily recoverable catalysts.