Heteronetwork clathrates with three-dimensional mixed silicate–water host frameworks and channel systems

Abstract

X-Ray structure analysis reveals that in the crystalline silicate hydrates with the approximate chemical compositions [NPhMe₃]₆[Si₈O₁₈(OH)₂]·38.7H₂O and [NBnMe₃]₈[Si₈O₂₀]·53.6H₂O (Bn = benzyl) cube-shaped octameric silicate anions and water molecules are linked via hydrogen bonds to form 3D mixed anionic host framework with channel systems; the interionic O ⋯ CH₃(N) anion-cation interactions observed in the heteronetwork clathrates are of particular interest with regard to a very recently proposed mechanism for the formation of mesoporous silicate materials (M41S).