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A new 4-Ti-added polyoxometalate

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Abstract

A new inorganic–organic hybrid 4-Ti-added polyoxometalate: [H2N(CH3)2]2Na3H5[{Ti(C2O4)(H2O)}2{Ti(C2O4)}2(B-β-SbW9O33)2]·22H2O (1) has been successfully made and further characterized by infrared spectroscopy, thermogravimetric analysis, powder X-ray diffraction and single-crystal X-ray diffraction. The polyoxoanion of 1 exhibits a Krebs-type structure that is constructed from two [B-β-SbW9O33]9− fragments fused together by a belt of four additional Ti atoms decorated by oxalate ligands. Furthermore, 1 as a heterogeneous catalyst exhibits high activity for Knoevenagel condensation under mild reaction conditions.

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The data generated during and/or analyzed during the current study are available from the corresponding author on the reasonable request.

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Acknowledgements

This work was supported by the NSFC (No. 21571016, 91122028 and 21831001) and the NSFC for Distinguished Young scholars (No. 20725101).

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H-LL and CL wrote the draft; H-LL and CL collected the data; G-YY contributed to conceived the idea of the study. All authors contributed to the writing and revisions.

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Correspondence to Guo-Yu Yang.

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Li, HL., Lian, C. & Yang, GY. A new 4-Ti-added polyoxometalate. Tungsten 6, 465–471 (2024). https://doi.org/10.1007/s42864-023-00221-5

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