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Elucidation of Ion Solvation in Ion-Exchange Resins and Interpretation of Separation Selectivity

Research Project

Project/Area Number 08454234
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 分離・精製・検出法
Research InstitutionTokyo Institute of Technology

Principal Investigator

OKADA Tetsuo  Tokyo Institute of Technology, Department of Chemistry, Associate Professor, 理学部, 助教授 (20183030)

Co-Investigator(Kenkyū-buntansha) OGUNI Masaharu  Tokyo Institute of Technology, Department of Chemistry, Professor, 理学部, 教授 (50144423)
Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥7,500,000 (Direct Cost: ¥7,500,000)
Fiscal Year 1997: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1996: ¥6,300,000 (Direct Cost: ¥6,300,000)
KeywordsIon-exchange / Solvation / Electrostatic Potential / Separation / 非水溶媒
Research Abstract

Two approaches have been investigated to elucidate ion-exchange separation selectivity. One is the elucidation of the solvation of ions in the resin. The other is physical modeling of separation behaviors. The solvation of ions in ion-exchange resin was studied basically by changing solvents and the structures of ion-exchange sites. Studies on anion-exchange indicated that the solvation of ion-exchange sites is not important in the determination of overall separation selectivity, while the solvation of counterious is very important. The separation selectivity of ions can be basically explained by ion-pair formation between ion-exchange sites and counterions. This result was included in a novel physical model for ion-exchange based on electrostatic theories. Starting from the Poisson-Boltzmann equation, some equations capable of explaining various phenomena occurring at the interface between ion-exchange resins and solution were derived. The complex formation of polyethers with ammonium ion chemically bonded on silica gel, the complexation of polyethers with countercations in cation-exchange resins, and usual ion-exchange separation were very well explained by developed models. Results strongly suggest that ion-pair formation, specific adsorption of ions, and the accumulation of ions in electrical double layr play decisive roles for the determination of ion-exchange selectivity.
In addition, capillary electrophoresis of Bronsted acids as heteroconjugated anions and effects of ultrasound on ion-exchange have been also studied. Reliable heteroconjugated anion formation constants can be determined for various combination of Bronsted acids with anions by the developed mthod. In addition, it was shown that ultrasound can be used as external stress to vary and modify the separation selectivity. This effects of ultrasound is caused by local temperature increases induced by the transmission of acoustic pressure.

Report

(3 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • Research Products

    (31 results)

All Other

All Publications (31 results)

  • [Publications] Tatsuo Okada: "Crown ether complexation in electrical double layer of aninon-exchange resin" Journal of Physical Chemistry B. 101. 7814-7820 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Tatsuo Okada: "Nonaqueous anion-exchange chromatography : Role of solvation in anion-exchange resin" Journal of Chromatography A. 758. 19-28 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Tatsuo Okada: "Nonaqueous capillary electrophoretic separation of Bronsted acids as heteroconjugated anions" Journal of Chromatography A. 771. 275-284 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Tatsuo Okada: "Ultrasound effects on ion-exchange chromatographic retention" Journal of Chromatography A. 793. 365-369 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Tetsuo Okada: "Interpretation of ion-exchange chromatographic retention based on electrical double laver model" Analytical Chemistry. (印刷中).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Tetsuo Okada: "Complexation of polyethers in cation exchange resin and application to chromatographic determination of complexation constants in solution" Journal of Physical Chemistry B. (印刷中).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Tetsuo Okada: "Design of chromatographic and electrophoretic separation based on ion-pair formation of aromatic disulfonates with polyammonium ions" Analytical Chemistry. 68 (7). 1158-1163 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Tetsuo Okada: "Electrophoretic detection and evaluation of heteroconjugate anion formation between Bronsted acids and the perchlorate ion in acetonitrile" Chemical Communications. 1779-1780 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Tetsuo Okada and Toshinori Usui: "Role of anions in complex formation of crown ethers with ammonium ion chemically bonded on silica gel" Journal of Chemical Society Faraday Transactions. 92 (24). 4977-4981 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Tetsuo Okada: "Nonaqueous anion-exchange chromatography : Role of solvation in anion-exchange resin" Journal of Chromatography A. 758. 19-28 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Tetsuo Okada: "Nonaqueous anion-exchange chromatography : Changing anion-exchange selectivity by resin surface complex formation of crown ethers" Journal of Chromatography A. 758. 29-35 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Tetsuo Okada: "Nonaqueous capillary electrophoretic separation of Bronsted acids as heteroconjugated anions" Journal of Chromatography A. 771. 275-284 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Tetsuo Okada: "Crown ether complexation in electrical double layr of anion-exchange resin" Journal of Physical Chemistry.B. 101 (39). 7814-7820 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Tetsuo Okada: "Ultrasound effects on ion-exchange chromatographic retention" Journal of Chromatography A. 793. 365-369 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Tetsuo Okada: "Nonaqueous anion-exchange chromatography : Changing anion-exchange selectivity by resin surface complex formation of crown ethers" Journal of Chromatography A. 758. 29-35 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Tetsuo Okada: "Interpretation of ion-exchange chromatographic retention based on electrical double layr model" Analytical Chemistry. 70 (in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Tetsuo Okada: "Complexation of polyethers in cation exchange resin and application to chromatographic determination of complexation constants in solution" Journal of Physical Chemistry B. 102 (in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Tetsuo Okada: "Micellar chromatography of inorganic compounds" Journal of Chromatography A. 780. 343-360 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Tetsuo Okada: "Nonaqueous ion-exchange chromatography and electrophoresis : Approaches to nonaqueous solution chemistry and design of novel separation" Journal of Chromatography A. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Tetsuo Okada: "Interpretation of chromatographic retention based on electrostatic theories" Analytical Sciences. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Tatsuo Okada: "Crown ether complexation in electrical double layer of anion-exchange resin" Journal of Physical Chemistry B. 101. 7814-7820 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Tetsuo Okada: "Nonaqueous anion-exchange chromatography : Role of solvation in anion-exchange resin" Journal of Chromatography A. 758. 19-28 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Tetsuo Okada: "Nonaqueous capillary electrophoretic separation of Bronsted acids as heteroconjugated anions" Journal of Chromatography A. 771. 275-284 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Tetsuo Okada: "Ultrasound effects on ion-exchange chromatographic retention" Journal of Chromatography A. 793. 365-369 (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] Tetsuo Okada: "Interpretation of ion-exchange chromatographic retention based on electrical double laver model" Analytical Chemistry. (印刷中).

    • Related Report
      1997 Annual Research Report
  • [Publications] Tetsuo Okada: "Complexation of polyethers in cation exchange resin and application to chromatographic determination of complexation constants in solution" Journal of Physical Chemistry B. (印刷中).

    • Related Report
      1997 Annual Research Report
  • [Publications] Tetsuo Okada: "Design of chromatographic and electrophoretic separation based on ion-pair formation of aromatic disulfonates with polyammonium ions" Analytical Chemistry. 68・7. 1158-1163 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Tetsuo Okada: "Electrophoretic detection and evaluation of heteroconjugate anion formation between Bronsted acids and the perchlorate ion in acetonitrile" Chemical Communications. 1779-1780 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Tetsuo Okada,Toshinori Usui: "Role of anions in complex formation of crown ethers with ammonium ion chemically bonded on silica gel" Journal of Chemical Society Faraday Transactions. 92・24. 4977-4981 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Tetsuo Okada: "Nonaqueous anion-exchange chromatography:Role of solvation in anion-exchange resin" Journal of Chromatography A. 758. 19 (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] Tetsuo Okada: "Nonaqueous anion-exchange chromatography:Changing anion-exchange selectivity by resin surface complex formation of crown ethers" Journal of Chromatography A. 758. 29 (1997)

    • Related Report
      1996 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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