Journal
MATERIALS TODAY COMMUNICATIONS
Volume 32, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.mtcomm.2022.103927
Keywords
Polyoxometalate; Cyanosilylation; Catalyst; Solvent-free
Categories
Funding
- Major Research Plan National Natural Science Foundation of China [92061102]
- Na-tional Natural Science Foundation of China [22171059]
- Natural Science Foundation of Heilongjiang Province [LH2021B013]
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A new polyoxometalate-based silver-organic framework has been synthesized and shows efficient catalytic activity in the cyanosilylation reaction, demonstrating significant potential for practical applications.
A new polyoxometalate-based silver-organic framework Ag-4(imbta)(4)((PWW11O40)-W-V-O-VI) (1) (imbta=1-imidazol-1-ylmethyl-1H-benzotriazole) was synthesized as heterogeneous catalysts for cyanosilylation, and characterized by infrared spectroscopy, elemental analysis, single-crystal X-ray diffraction and X-ray photoemission spectra. The results of single crystal X-ray indicate that in compound 1, Ag ions, imbta ligands and PW(12)O(40)(3-)construct a 2D layers by covalent bonds. The adjacent 2D layers are further connected together through numerous pi center dot center dot center dot pi interactions and C-H center dot center dot center dot O hydrogen bonding interactions to achieve a 3D supramolecular architecture. More importantly, compound 1 is able to act as a highly efficient heterogeneous Lewis acid-base catalyst for cyanosilylation of various aldehydes at room temperature under solvent-free condition. The conversion of anisaldehyde to the product of cyanohydrin trimethylsilyl ether reaches up to 99.9% within 4 h by catalyzing of compound 1. Also, it is observed that there is no obvious decrease of catalytic activity after three cycles. Therefore, the compound 1 has significant potential as environmental-friendly catalyst for widely practical application in cyanosilylation reactions.
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