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High Surface Area Silicon Imidonitrides: A New Class of Microporous Solid Base
Author(s) -
Bradley John S.,
Vollmer Oliver,
Rovai Riccardo,
Specht Ullrich,
Lefebvre Frédéric
Publication year - 1998
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/(sici)1521-4095(199808)10:12<938::aid-adma938>3.0.co;2-8
Subject(s) - materials science , microporous material , catalysis , knoevenagel condensation , mesoporous material , silicon , base (topology) , chemical engineering , amorphous solid , specific surface area , silicon nitride , nanotechnology , organic chemistry , composite material , metallurgy , chemistry , mathematical analysis , mathematics , engineering
Shape‐ or size‐selective micro‐ and mesoporous solids find applications as catalysts, catalyst supports, and membrane materials. Here the synthesis of a high surface area microporous base is reported. This material, prepared by ammonolysis of oligomeric methylsilazanes, is a nitride analogue of amorphous silica‐based mixed metal oxides. The sharply defined microporosity of silicon imidonitride materials and their observed activity in the base‐catalyzed Knoevenagel reaction, together with their large number of N–H groups, raises the possibility that these materials will function as size‐selective solid base catalysts.