Nitroaldol condensation catalyzed by topologically modulable cooperative acid–base chitosan–TiO2 hybrid materials

Chitosan–TiO2 shaped as macroporous aerogels, lamellar cryogels or electrospun films act synergistically as acid–base bifunctional catalysts. Depending on the topology of the material, a marked difference in the selectivity for nitroaldol condensation is observed.