Sol-Gel Synthesis of a Nanostructured Hybrid Material from an Organosiloxane Oligomer with a Terminal Phenyl Group

摘要

A novel ordered siloxane-organic hybrid material has been prepared by hydrolysis and polycondensation of a well-defined alkoxysilane precursor consisting of a tetrasiloxane unit and a 4-phenylbutyl group (1). Evaporation-indnced self-assembly during hydrolysis and polycondensation of 1 led to the formation of a two-dimensional (2D) hexagonal mesostracture, which was revealed by X-ray diffraction (XRD) and transmission electron microscopy (TEM). Solid-state ~(13)C CP/MAS NMR and ~(29)Si MAS NMR confirmed that the product consisted of 4-phenylbutyl groups and siloxane networks, both of which are linked via Si-C bonds. These results will allow us to produce functional hybrid materials by chemical modification of phenyl groups, and also by incorporating other organic groups. Furthermore, calcination of this hybrid to remove organic groups led to the creation of an ordered microporous silica with the Brunauer-Emmett-Teller (BET) surface area of 570 m~2 g~(-1) and the average pore diameter of 1.2 nm.