Porous Materials as Nano Reactor for Preparation of Fine Chemical: Scope and Limitation

Interest in applications of nano-size and nano-porous materials as supports for catalysts are continuous to thrive. Part of this interest is due to the high surface area and pore structure of supports which can be tailored for a specific application. Among many supports Si-MCM-41 mesoporous silica with hexagonal array of channels or Si-MCM-48 mesoporous silica with three-dimensional pore network, larger surface areas and uniform pore size distributions have attracted considerable amount of interest in catalysis research. A number of catalysts in form of single [1] or binary oxides [2] and metal complexes [3] have supported on mesoporous silica and have been used as heterogonous catalysts for the preparation of final chemicals. In spite of a large number of works in this area, immobilizations of mixed-metal complexes such as M2M'O(OOCH3-nCln)6 or metal tetrasulfophthalocyanine complexes (MPcS) on nanoporous of mesoporous silicas have received less attention