Diaminosilane-functionalized on silicate-stabilised hydrotalcite (MA-HTSi-DA): As potential catalyst for nitro-aldol condensation

• First report on diaminosilane functionalized silicate-anion-intercalated hydrotalcite (HT).
• The basicity increased by introducing diaminosilane on HT materials.
• The resultant materials showed good conversion with formation of dehydrated product.
• Catalyst yield excellent conversion for variety of aldehydes.

Diaminosilane was introduced into silicate-anion-intercalated hydrotalcite (HT-Si) using a post-synthesis method. The resulting functionalized materials possess surface basicity. The textural properties of the functionalized materials were systematically investigated through powder XRD, FTIR and MAS–NMR studies. The diamine-functionalized materials showed very good catalytic activity for the nitro-aldol condensation of benzaldehyde and nitromethane under solvent-free conditions. The materials showed comparable catalytic activity upon recycling.

First time, diaminosilane was introduced into silicate-anion-intercalated hydrotalcite using post-synthesis method. The functionalised materials were systematically investigated through powder XRD, FT-IR and MAS–NMR studies. The materials showed very good catalytic activity on nitroaldol condensation of benzaldehyde and nitromethane.Figure optionsDownload high-quality image (176 K)Download as PowerPoint slide