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Four octamolybdate- and Keggin-based compounds constructed by flexible bis(triazole) ligands with different spacers

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Abstract

By using two kinds of flexible bis(triazole) ligands 1,3-bis(1,2,4-triazol-1-y1)propane (btp) and 1,6-bis(1,2,4-triazol-1-y1)hexane (btx), four compounds based on octamolybdate and Keggin anions were obtained, respectively, under hydrothermal conditions, namely [Cu(btp)2(H2O)(α-Mo8O26)1/2]·H2O (1), [Cu2(btx)4(β-Mo8O26)] (2), [Ag3(btp)2(PW12O40)] (3) and [Cd(btx)3(SiW12O40)]·H2btx (4). These compounds were structurally characterized by physico-chemical and spectroscopic methods. In compound 1, there is a metal–organic layer containing square tetra-nuclear cycles. Two layers cover [Mo8O26]4− anions to form a new layer. Adjacent new layers penetrate to build a three-dimensional (3D) framework. Compound 2 contains a rhomboid tetra-nuclear cycle to surround a Mo1-containing anion. These cycles are connected by btx ligands to form a two-dimensional (2D) layer. Adjacent layers are connected by Mo5-containing anions, and a 3D structure is constructed. Compound 3 contains bi-nuclear cycles which are further linked by anions and Ag2 atoms to form a 2D layer. The metal–organic chains in compound 4 are linked by Keggin anions to form a 2D structure. We also studied the photocatalytic and electrochemical behavior of compounds 1–4.

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Acknowledgements

Financial supports of this research by the National Natural Science Foundation of China (Nos. 21571023 and 21101075).

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Authors and Affiliations

  1. Key Laboratory of Polyoxometalate Science of Ministry of Education, Faculty of Chemistry, Northeast Normal University, Changchun, 130024, Jilin, People’s Republic of China

    Jun Ying, Xiuyan Wang & Yaguang Chen

  2. Faculty of Chemistry and Chemical Engineering, Bohai University, Jinzhou, 121013, People’s Republic of China

    Jun Ying

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  1. Jun Ying
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  2. Xiuyan Wang
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  3. Yaguang Chen
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Correspondence to Yaguang Chen.

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Ying, J., Wang, X. & Chen, Y. Four octamolybdate- and Keggin-based compounds constructed by flexible bis(triazole) ligands with different spacers. Transit Met Chem 45, 343–352 (2020). https://doi.org/10.1007/s11243-020-00385-w

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