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Various aminopropyl-functionalized silicas (APS) were prepared by the sol-gel technique using different tetraethyl orthosilicate/aminopropyltriethoxysilane (TEOS/ATS) ratios and tested as base catalysts for the nitroaldol reaction. The solids were fully characterized. It was proved that the amount of organic component strongly influences the composition and textural properties of the hybrid organic-inorganic...
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