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Citation: MA Rong-Hua, DENG Qi-Gang, LIU Chun-Tao. Synthesis,Characterization and Catalytic Behavior of Heteropolytungstates Containing Peroxozirconium[J]. Chinese Journal of Applied Chemistry, ;2004, 21(5): 475-478. shu

Synthesis,Characterization and Catalytic Behavior of Heteropolytungstates Containing Peroxozirconium

1.
a Department of Chemistry, Qiqihar University, Qiqihar 161006;
2.
b Qiqihar Environmental Monitoring Centre, Qiqihar

Corresponding author: MA Rong-Hua,
Received Date: 27 June 2003
Available Online: 30 September 2003
Fund Project:

Five heteropoly acid isomers α-K₆[SiW₁₁ZrO₄₀]·xH₂O, α-K₆[SiW₁₁(ZrO₂)²⁺O₃₉]·xH₂O and β_i-K₆[SiW₁₁(ZrO₂)²⁺+O₃₉]·xH₂O(β_i=β₁,β₂,β₃) were synthesized and characterized. The IR, UV spectrometry, polarography and chemical titration confirmed the existence of ZrO₂ groups in the complexes. All ¹⁸³W NMR spectra revealed the Keggin structure of anions in the compounds. The catalytic epoxidation of maleic acid showed that the catalytic activity of these complexes is higher than those of their corresponding complexes not containing peroxyion. Meanwhile the activity of β isomer is higher than that of α isomer.
- peroxozirconium heteropolytungstates,
- isomer,
- epoxidation,
- catalytic activity
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