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Study on Synthesis and Structural Chemistry of Tungstate Family Using Host-Guest Reactions

Research Project

Project/Area Number 01550592
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field 無機工業化学
Research InstitutionYamanashi University

Principal Investigator

MIYAKE Michihiro  Yamanashi Univ., Fac. Eng., Res. Associate, 工学部, 助手 (30143960)

Co-Investigator(Kenkyū-buntansha) SUZUKI Takashi  Yamanashi Univ., Fac. Eng., Prof., 工学部, 教授 (60020385)
Project Period (FY) 1989 – 1990
Project Status Completed (Fiscal Year 1990)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1990: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1989: ¥1,500,000 (Direct Cost: ¥1,500,000)
KeywordsHost-guest Reaction / Cation-exchange / Synthesis / Molten Salt / Layer Structure / Tunnel Framework Structure / Tungstate / Manganate / イオン伝導
Research Abstract

The host-guest reaction can create metastable isomorphic or polymorphic forms which cannot be prepared by the ordinary synthetic methods, i. e., fusion, solid-state reaction, hydrothermal techniques and so on. Thus, the unique functions are expected to be manifested in the new compounds. In this study, the host-guest reactions on tungstate family have been investigated.
1. Interlayer Na^+ions in Na_2W_4O_<13> with layer structure were found to be topotactically exchanged for univalent cations in molten nitrate salts. Consequently, new Li_2W_4O_<13>, K_2W_4O_<13> and Rb_2W_4O_<13>, which are isostructural with Na_2W_4O_<13>, were successfully synthesized. The Li_2W_4O_<13> showed much lower ionic conductivity than the original Na_2W_4O_<13>.
2. K^+ions in K_2W_4O_<13> with its tunnel framework structure were found to be topotactically exchanged for univalent cations in molten nitrate salts. Consequently, new LiKW_4O_<13>, Na_<1.4>K_<0.6>W_4O_<13>, Rb_<0.8>K_<1.2>W_4O_<13>, and Ag_<1.5>K_<0.5>W_4O_<13>, which are isostructural with K_2W_4O_<13>, were successfully synthesized. Proton-exchanged potassium tungstates (H_<0.25>K_<1.75>W_4O_<13>), which is isostructural with K_2W_40_<13>, were also found to have the feasibility of the potassium memorized exchangers.
3. The cation-exchanges of K_2Mn_4O_8 in aqueous solutions and molten salts revealed to be able to produce new hydrous R_2Mn_4O_8・nH_2O (R=Li, Na, Ag, and NH_4 ; n=1-2) and anhydrous R_2Mn_4O_8 (R=Li, Na, and NH_4) with layer structures.

Report

(3 results)
  • 1990 Annual Research Report   Final Research Report Summary
  • 1989 Annual Research Report
  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] 鈴木 喬: "タングステン酸塩(Na_xK_<2ーx>W_4O_<13>,H_xK_<2ーx>W_4O_<13>)のカリウムイオン記憶特性" 日本海水学会誌. 44. 185-188 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] M.Miyake: "Cationーexchange characteristics of K_2W_4O_<13> in molten nitrate salts" J.Solid State Chemistry.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] M.Miyake: "Cationーexchange characteristics of Na_2W_4O_<13> in molten nitrate salts" J.Solid State Chemistry.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] T. Suzuki, M. Miyake, Y. Yoshikawa and T. Yoshida: "Potassium ion memorized characteristics of tungstates (Na_xK_<2-x>W_4O_<13> and Na_xK_<2-x>W_4O_<13>" Bull. Soc. Sea Water Sci. Jpn.44. 185-188 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] M. Miyake, Y. Yoshikawa and T. Suzuki: "Cation-exchange characteristics of K_2W_4O_<13> in molten nitrate salts" J. Solid State Chemistry.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] M. Miyake and T. Suzuki: "Cation-exchange characteristics of Na_2W_4O_<13> in molten nitrate salts" J. Solid State Chemistry.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1990 Final Research Report Summary
  • [Publications] 鈴木 喬: "タングステン酸塩(Na_xK_<2ーx>W_4O_<13>,H_xK_<2ーx>W_4O_<13>)のカリウムイオン記憶特性" 日本海水学会誌. 44. 185-188 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] M.Miyake: "Cationーexchange Characteristics of K_2W_4O_<13> in molten Nitrate salts" J.Solid State Chemistry.

    • Related Report
      1990 Annual Research Report
  • [Publications] M.Miyake: "Cationーexchange Characteristics of Na_2W_4O_<13> in molten Nitrate salts" J.Solid State Chemistry.

    • Related Report
      1990 Annual Research Report
  • [Publications] 鈴木喬、三宅通博、吉川ユミ、吉田敏行: "カリウムイオン記憶無機キオン交換体の開発(I)" 日本海水学会誌.

    • Related Report
      1989 Annual Research Report
  • [Publications] M.Miyake and T.Suzuki: "Host-guest reactions of tunnel structure K_2W_4O_<13> in molten salt baths" J.Solid State Chemistry.

    • Related Report
      1989 Annual Research Report
  • [Publications] M.Miyake and T.Suzuki: "Hose-guest reactions of layer structure Na_2W_4O_<13> in molten salt baths" J.Solid State Chemistry.

    • Related Report
      1989 Annual Research Report

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Published: 1989-04-01   Modified: 2016-04-21  

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