Nanosized Homopalladium and Heteronickel/Heteropalladium Carbonyl Clusters

本研究特别关注于均钯和双金属钯- ni、钯- pt、钯-M（其中M是Cu、Ag、Au）和铂-金羰基簇，因为它们在设计具有有用的催化、电子、磁性和/或光学行为的新材料时，作为理想的前体具有潜在的技术重要性。主要目标是在受控条件下设计制备途径，以合理的产量生产新的纳米级金属团簇，以实现物理/化学研究。正在研究的团簇包括具有35、39、52、54、59、66和145个金属原子的同钯团簇，以及具有许多其他金属的类似大小的异金属团簇。已经建立了合作关系，对一些前所未有的纳米结构材料进行特别的最先进的测量和高水平的理论计算，包括对这些通常定义良好的均匀连接簇（其中至少有几个可能具有介金属行为）的物理性质和电子结构与裸的进行比较分析。以及相同金属的结扎纳米颗粒，它们的尺寸分布很窄。这项研究利用合成突破来制造涉及大型纳米级金属配合物的新材料。该研究可能与广泛应用于许多有机反应的商业催化剂有关。学生将接受纳米材料的合成和物理测量方面的培训。

This research especially focuses on homopalladium and bimetallic Pd-Ni, Pd-Pt, Pd-M (where M is Cu, Ag, Au), and Pt-Au carbonyl clusters, because they are of potential technological importance as ideal precursors in the design of new materials with useful catalytic, electronic, magnetic, and/or optical behavior. A major goal is to devise preparative pathways under controlled conditions to produce new, nanosized metal clusters in reasonably good yields to enable physical/chemical studies. Clusters under study include homopalladium ones with 35, 39, 52, 54, 59, 66, and 145 metal atoms in their cores and similarly large heterometallic ones with a number of other metals. Collaborations have been established to carry out particular state-of-the-art measurements and high-level theoretical calculations on a number of the unprecedented nanostructured materials, including comparative analyses of physical properties and electronic structures of these normally well-defined, homogeneous ligated clusters (of which at least several should possibly possess mesometallic behavior) with those of naked. and ligated nanoparticles of the same metals with narrow size distributions. This research capitalizes on synthetic breakthroughs to make new materials involving large nanoscaled metal complexes. The research has possible relevance to commercial catalysts widely used in many organic reactions. Students will be trained in the synthesis and physical measurements of nanosized materials.