Ethenylene-bridged periodic mesoporous organosilicas with ultra-large mesopores

摘要

E-configured ethenylene-bridged periodic mesoporous organosilicas with ultra-large mesopores and unprecedented pore volumes have been developed for the first time.rnPeriodic mesoporous organosilicas (PMOs) are a relatively novel group of organic-inorganic hybrid materials in which the organic groups are not located in the pores, but rather are an intrinsic part of the pore walls. They are prepared via the direct condensation of bridged organosilanes, most commonly of the type (RO)_3Si-R'-Si(OR)_3, in the presence of a structure directing agent. This way nanocomposites with a high organic content can be obtained while preserving the pore ordering and uniformity. Ethenylene-bridged PMOs are especially interesting as they are easily modified by means of olefin chemistry.