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Abstract:
A Tm(III)-rich silicotungstate Na{Tm3(H2O)17[Tm2(H2O)7(Si2W18O66)]}·35H2O (Tm5Si2W18) based on the open Wells-Dawson-type [Si2W18O66]16- building unit was synthesized by the reaction of Na10[α-SiW9O34]·18H2O, itaconic acid, and TmCl3 in a HAc/NaAc buffer solution. Five kinds of Tm(III) ions were found in this compound and further linked the {Tm2Si2W18} subunit to form an interesting wavy 1D chain structure, which achieved the introduction of more lanthanide (Ln) ions into the [Si2W18O66]16- unit for the first time. Tm5Si2W18 contains multiple exposed Tm-metal active sites, making it an efficient catalyst for the acetalization of 2-aminobenzamides/2-aminobenzenesulphonamides with aldehydes. A series of 2,3-dihydroquinazolinones and 3,4-dihydro-2H-1,2,4-benzothiadiazine-1,1-dioxides could be obtained in excellent yields under green and mild conditions. © 2025 American Chemical Society.
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Inorganic Chemistry
ISSN: 0020-1669
Year: 2025
Issue: 2
Volume: 64
Page: 1041-1047
4 . 3 0 0
JCR@2023
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