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Title: NBCL5 FUNCTIONALIZED PERLITE: A POTENT AND RECYCLABLE CATALYST FOR SYNTHESIS OF PYRANS (Article)
Authors: Lakshminarayanan, Komalavalli
Sivanandhan, Monisha
Ramasundaram, Subramaniyan
Oh, Tae Hwan
Shah, Kinjal J
Saranraj, Kumaravel
Parasuraman, Amutha
Balu, Krishnakumar
Keywords: perlite
NbCl5
heterogeneous catalyst
multi component reactions (MCRs)
pyrans
Issue Date: Feb-2023
Publisher: MDPI
Abstract: Niobium pentachloride functionalised perlite was prepared via a solid state dispersion technique, which was utilized as an efficient heterogeneous catalyst for the synthesis of pyrans. The immobilisation of NbCl5 over perlite was examined by Fourier-transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), Thermogravimetric analysis (TGA), scanning electron microscope (SEM) with energy dispersive spectra (EDS), and Brunauer, Emmett and Teller (BET) surface area measurements. The wt% of NbCl5-loaded perlite was optimized based on the adequacy with respect to the yield of the pyrans in various solvents. The recyclability of the catalyst was validated in synthesizing pyrans and the results marked its efficiency up to five runs. The efficacy of the NbCl5/perlite catalyst was found to be comparable and better with respect to the other heterogeneous catalysts reported. The structures of pyrans were confirmed by FT-IR, 1H and 13C NMR spectral techniques. The proposed recyclable heterogeneous NbCl5/perlite catalyst simplifies the protocol, and has minimal chemical waste, a lower reaction time and a high-yield.
URI: https://doi.org/10.3390/su15043678
ISSN: 20711050
Appears in Collections:b) 2023-Scopus Open Access (Pdf)

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