Cu-3-trz-PMo12的合成、结构及催化氧化碘离子性能

doi:10.19964/j.issn.1006-4990.2021-0703

Abstract

Abstract:

A new inorganic?organic hybrid compound based on polyoxometalates was synthesized by hydrothermal method，and characterized by X-ray single crystal diffraction，fourier transform infrared spectroscopy（IR），thermal analysis test（TG），X-ray diffraction analysis（XRD），scanning electron microscopy（SEM），element analysis.The X-ray single crystal diffraction analysis result showed that the structural formula of the compound was（PMo₁₂O₄₀）［Cu₆（C₂H₄N₄）₆］（PMo₁₂O₄₀）?H₂O（short for Cu-3-trz-PMo₁₂），which was belonged to trigonal crystal system and R-3 space group.The crystal cell parameters were a=1.756 66（3） nm，b=1.756 66（3） nm，c=2.303 24（6） nm，α=β=90°，γ=120°，V=6.155 2（3） nm³，Z=3，R₁=0.023 8，wR₂=0.059 2.The compound was a dimer composed of six 3-amino-1，2，4-triazoles，six copper ions，two classical Keggin type［PMo₁₂O₄₀］^3- and one interstitial water molecule.The two dimers were alternately linked by hydrogen bonds to form secondary units，and each secondary unit was formed by hydrogen bonds to form a three?dimensional supramolecular structure.The results showed that the heterogeneous catalyst had good catalytic activity and stable repeatability in the process oxidation of iodide ion by hydrogen peroxide.

Key words: polyoxometalate, crystal structure, catalytic oxidation, iodine ion

CLC Number:

TQ131.2

YUAN Changmei,GUO Jun,ZHANG Dan,ZHANG Taiwen. Synthesis，structure and catalytic oxidation performance of iodine ion of Cu-3-trz-PMo₁₂[J]. Inorganic Chemicals Industry, 2022, 54(8): 145-150.

Figures/Tables 9

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D-H···A	d（D—H）/ nm	d（H—A）/ nm	d（D···A）/ nm	∠（D—H···A）/（°）
N（4）—H（4B）···O（1）	0.088 0	0.273 7	0.320 9	115.0
N（3）—H（3）···O（4）	0.088 0	0.273 7	0.312 8	108.3
N（4）—H（4A）···O（7）	0.088 0	0.301 8	0.337 0	106.1
C（1）—H（1）···O（9）	0.095 1	0.273 5	0.355 3	144.7
C（1）—H（1）···O（7）	0.095 1	0.281 4	0.335 5	117.1

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Synthesis，structure and catalytic oxidation performance of iodine ion of Cu-3-trz-PMo₁₂

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Synthesis，structure and catalytic oxidation performance of iodine ion of Cu-3-trz-PMo12