Possible Roles of the Spatial Distribution of Organic Guest Species in Mesoporous Silicas to Control the Properties of the Hybrids

Mesoporous silicas are promising materials for the construction of host-guest hybrids by the accommodation of functional unit/guest species into the mesopore, and moreover, by hierarchical assembly with controlled location, density, and orientation. Precisely designed structures open up the versatile functions of mesoporous silicas and their host-guest systems. In this microreview, the spatial distribution (location, density, and orientation) of the organic functional units/guest species in mesoporous silicas (mainly one-dimensional cylindrical) is discussed to highlight the present status of the host-guest chemistry of mesoporous silicas.