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Citation: MA Rong-Hua, LI Ying-Jie, LIU Chun-Tao, QU Lun-Yu. Synthesis and Catalytic Activity of Triniobium and Triperoxyniobium Heteropolytungstophophates[J]. Chinese Journal of Applied Chemistry, ;2004, 21(6): 551-555. shu

Synthesis and Catalytic Activity of Triniobium and Triperoxyniobium Heteropolytungstophophates

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a College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006;
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b Qiqihar Enviromental Monitoring Centre, Qiqihar;
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c College of Chemistry, Northeast Normal University, Changchun

Corresponding author: MA Rong-Hua,
Received Date: 29 July 2003
Available Online: 15 October 2003
Fund Project: 国家自然科学基金(29471009) (29471009)

Six heteropoly complexes M₃H₂[PW₉(NbO₂)₃O₃₇]·xH₂O and M_4-mH_m[PW₉Nb₃O₄₀]·xH₂O(M=(CH₃)₄N+, (C₄H₉)₄N⁺,(C₂H₅)₄N⁺,(C₇H₁₅)₄N⁺) were synthesized and characterized. IR, UV spectrometry, polarography and chemical titration confirmed the existence of NbO₂ groups in the complexes. All their ¹⁸³W NMR spectra have six peaks, showing the Keggin structure of anions in the compounds. Oxidation of maleic acid into tartaric acid showed that the complexes containing peroxy ions exhibited higher catalytic activity than those without peroxy ions.
- peroxyniobiun heteropoly tungstate,
- catalytic activity,
- synthesis
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