Synthesis of a covalently bound polymeric borazine structure on a mesoporous silica gel

Abstract

The successive modification of a well-characterized porous silica gel with BCl₃ and NH₃ has been studied using FTIR spectroscopy with photoacoustic detection and quantitative boron chloride and ammonia analysis of the surfaces formed. A borazine-like, highly cross-linked polymeric boron–nitrogen network, chemically bound to the silica surface, is created after four BCl₃–NH₃ reaction cycles at low reaction temperatures. Combining IR and elemental analysis results yielded a quantitative depiction of the surface structure and the reaction mechanisms.

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