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- W2039405963 abstract "The hydrolytic sol–gel polymerization of a variety of molecularprecursors with a “rigid” geometry 1,4-C6H4[Si(OMe)3]21 and a “flexible” geometry (MeO)3Si-(CH2)10-Si(OMe)32 was investigated varyingthe nature of the catalyst, the temperature and the length of ageing. Thereactions were performed using ionic and non-ionic catalysts. The ionicones were a nucleophile [tetrabutylammonium fluoride (TBAF)]or acid (HCl) and the non-ionic one was dimethylaminopyridine (DMAP).The solvent was THF. In all cases, the length of ageing had a minor effecton the level of condensation at silicon atoms of the different xerogels. Onlya small increase was observed. In contrast, the specific surface area, theporosity and the pore size were highly dependent on the length of ageing.The longer ageing times favoured the formation of mesoporous solids with highspecific surface areas and narrow pore size distribution." @default.
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- W2039405963 date "2001-01-01" @default.
- W2039405963 modified "2023-10-12" @default.
- W2039405963 title "Sol–gel process—influence of ageing on the textural properties of organosilsesquioxane materials" @default.
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- W2039405963 doi "https://doi.org/10.1039/b008362n" @default.
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