AI Article Synopsis
- The study synthesized a molybdo-substituted tungstophosphoric acid catalyst and combined it with bentonite clay using a wetness impregnation method.
- The catalysts were thoroughly characterized through various techniques, including ICP-AES, FT-IR, XRD, SEM-EDS, TEM, and TG-DTA, to assess their properties.
- This catalyst proved to be highly effective for green synthesis of specific organic compounds under solvent-free conditions and maintained its catalytic activity even after multiple uses.
Article Abstract
The Keggin-based molybdo-substituted tungstophosphoric acid, H[PWMoO]·12HO, were synthesized and incorporated with a bentonite clay by using a wetness impregnation method. The catalysts were characterized using several methods, such as inductively coupled plasma-atomic emission spectroscopy (ICP-AES), Fourier transform infrared spectroscopy (FT-IR), X-ray diffractometry (XRD), scanning electron microscopy energy-dispersive X-ray spectroscopy (SEM-EDS), transmission electron microscopy (TEM), and thermogravimetric and differential thermal analysis (TG-DTA). This extremely active catalytic system provides a green strategy for the synthesis of 1,8-dioxo-octahydroxanthene and 1,8-dioxo-decahydroacridine derivatives under solvent free conditions at 80 °C with a good reaction mass efficiency, effective mass yield, and excellent atom economy. Both the surface acidity and catalytic activity sharply increased after H[PWMoO]·12HO was impregnated with bentonite clay. In addition, the PWMo/bentonite catalyst can be conveniently recovered and reused numerous times without demonstrating a significant loss in activity.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8695863 | PMC |
| http://dx.doi.org/10.1039/d1ra01179k | DOI Listing |
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