Tungsten-substituted molybdophosphoric acid impregnated with kaolin: effective catalysts for the synthesis of 3,4-dihydropyrimidin-2(1H)-ones via biginelli reaction.

ABSTRACT: A series of highly reusable heterogeneous catalysts (10-25 wt% PMo₇W₅/kaolin), consisting of tungsten-substituted molybdophosphoric acid, H₃PMo₇W₅O₄₀·24H₂O (PMo₇W₅) impregnated with acid treated kaolin clay was synthesized by the wetness impregnation method. The newly synthesized catalyst was fully characterized using inductively coupled plasma-atomic emission spectroscopy (ICP-AES), Fourier transform infrared (FT-IR), powder X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), transmission electron microscopy (TEM), Brunauer-Emmett-Teller (BET) analysis and thermal analysis (TG-DTA). The synthesized materials were shown to be efficient in the s

SUBMITTER: Aher DS 

PROVIDER: S-EPMC8693839 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature