Abstract:
Nanocrystalline zirconosilicates and titanosilicates
with MFI framework structure were hydrothermally synthesized
by the addition of organosilanes in the synthesis composition of
conventional zirconosilicate and titanosilicate materials. Materials
were characterized by a complementary combination of X-ray
diffraction, nitrogen sorption, scanning/transmission electron
microscopy (S/TEM), ammonia temperature-programmed desorption (TPD), Fourier transform infrared (FT-IR) spectroscopy, and ultraviolet−visible (UV-vis) spectroscopic investigations.
Nanocrystalline zeolite catalysts of the present study are reusable.
They exhibit significantly higher catalytic activities in aminolysis
and alcoholysis compared with the hitherto known catalysts. A
range of β-amino alcohols/β-alkoxy alcohols with high
regioselectivity were synthesized using zirconosilicates. Application of these materials was also extended in the synthesis of aminoesters by the hydroamination reaction of methyl acrylates and
amines. Structure activity relationship was explained based on acidity measurements, reactivity of amines/alcohols, and
adsorption of reactants on catalysts
