Synthesis and Characterization of Bifunctional Periodic Silica with Surface and Framework Benzene Functionality

Abstract

Novel organic-inorganic hybrid mesoporous molecular sieve of MCM-41 type containing both bridge-bonded phenyl groups in the walls and terminally bonded phenyl groups protruding into the channel space was synthesized using TEOS, 1,4-bis(triethoxysilyl)benzene (BTESB) and (triethoxysilyl)benzene (TESB) as precursors, cetyl pyridine bromide (CPBr) as template under acidic conditions. This new material was characterized by means of FT-IR, PXRD and nitrogen adsorption-desorption isotherms. The mesoporous organosilica was in-situ sulfonylated and reacted with diamines.