Controlled Arrangement of Clusters in Mesoporous Materials

在这个项目中，量身定做的分子金属团簇将被插入到介观结构的无机基质中。主要的重点在于制定准备方法，以便能够控制集群比例以及集群之间的距离。原则上，将采用两种不同的方法，即在存在结构导向剂的情况下，采用溶胶凝胶法。一方面，将采用两步法，在孔内具有锚基的有序无机基质的建立之后，金属团簇的合成后锚定，从而在主体基质的孔内建立团簇。另一方面，除了簇碎片和相应的簇配体外，还将使用(量身定制的)单源前体，用于同时建立无机主体基质和在孔内形成簇。这两种方法都有明显的创新和风险方面，例如在孔内形成团簇，或者控制两种不同的并行机制，即溶胶-凝胶过程，这导致无机基质的积累和团簇的形成。

In this project tailor-made molecular metal clusters will be inserted into a mesostructured inorganic host matrix. The main focus lies on the development of preparative methodologies that may allow the control over the cluster proportion as well as over the cluster-cluster distances. In principle, two different approaches based on sol-gel processes in the presence of structuredirecting agents will be applied. On the one hand, a two-step route will be adopted whereat the build-up of the ordered inorganic matrix with anchor groups within the pores will be followed by a post-synthesis anchoring of the metal clusters and accordingly, the build-up of the clusters within the pores of the host matrix. On the other hand, a (tailor-made) single-source precursor will be employed in addition to cluster fragments and accordingly, cluster ligands for a simultaneous build-up of the inorganic host matrix and the cluster formation within the pores. Both approaches have clear innovative and risky aspects, such as the cluster formation within the pores or the control over two different, concurrent mechanisms that is the sol-gel process, which leads to the build-up of the inorganic host matrix and the cluster formation.