Anion exchangeable layered silicates modified with ionic liquids on the interlayer surface

Nobuyuki Takahashi, Hideo Hata, Kazuyuki Kuroda

    Research output: Contribution to journalArticle

    34 Citations (Scopus)

    Abstract

    Novel layered materials with two-dimensionally arranged anion exchangeable sites in the interlayer space were prepared by immobilization of imidazolium chloride salts (1-butyl (or 1-octyl)-3-(3-triethoxysilylpropyl)-4,5- dihydroimidazolium chloride, abbreviated as BimSi(OEt)3Cl or OimSi(OEt)3Cl, respectively) containing terminal triethoxysilyl groups onto layered octosilicate via silylation. More than 80% of SiOH/SiO - groups on the silicate layers were silylated and they are denoted as Bim-Oct and Oim-Oct. The cation exchangeable sites on octosilicate were stoichiometrically converted to anion exchangeable sites. The confronting arrangement of SiOH/SiO- groups on octosilicate is essential for this stoichiometric conversion because the silylation reagents ideally react with the surface SiOH/SiO- groups to form bidentate immobilization on octosilicate. The anion exchangeable capacity of the silylated materials is around 2 mmol g-1. The affinity of these materials for Cl -, Br-, I-, and NO3 - is quite different from those of conventional anion exchangeable layered double hydroxides (LDHs). Bim-Oct is stable at pH 1.0, which is in clear contrast to the behavior of LDHs. Bim-Oct exhibits a high capacity for sorption of sulfasalazine, a bulky prodrug. The release behavior of the accommodated sulfasalazine is largely dependent on the pH values of simulated gastric and intestinal fluids, suggesting that these novel layered anion exchangers are potentially applicable to drug delivery systems.

    Original languageEnglish
    Pages (from-to)3340-3348
    Number of pages9
    JournalChemistry of Materials
    Volume22
    Issue number11
    DOIs
    Publication statusPublished - 2010 Jun 8

    Fingerprint

    Ionic Liquids
    Silicates
    Ionic liquids
    Anions
    Negative ions
    Hydroxides
    Sulfasalazine
    Ion exchangers
    Prodrugs
    Cations
    Sorption
    Chlorides
    Salts
    Positive ions
    Fluids
    octosilicate

    ASJC Scopus subject areas

    • Materials Chemistry
    • Chemical Engineering(all)
    • Chemistry(all)

    Cite this

    Anion exchangeable layered silicates modified with ionic liquids on the interlayer surface. / Takahashi, Nobuyuki; Hata, Hideo; Kuroda, Kazuyuki.

    In: Chemistry of Materials, Vol. 22, No. 11, 08.06.2010, p. 3340-3348.

    Research output: Contribution to journalArticle

    @article{4776050c1d6b4bce9efad9ad0a5d88ed,
    title = "Anion exchangeable layered silicates modified with ionic liquids on the interlayer surface",
    abstract = "Novel layered materials with two-dimensionally arranged anion exchangeable sites in the interlayer space were prepared by immobilization of imidazolium chloride salts (1-butyl (or 1-octyl)-3-(3-triethoxysilylpropyl)-4,5- dihydroimidazolium chloride, abbreviated as BimSi(OEt)3Cl or OimSi(OEt)3Cl, respectively) containing terminal triethoxysilyl groups onto layered octosilicate via silylation. More than 80{\%} of SiOH/SiO - groups on the silicate layers were silylated and they are denoted as Bim-Oct and Oim-Oct. The cation exchangeable sites on octosilicate were stoichiometrically converted to anion exchangeable sites. The confronting arrangement of SiOH/SiO- groups on octosilicate is essential for this stoichiometric conversion because the silylation reagents ideally react with the surface SiOH/SiO- groups to form bidentate immobilization on octosilicate. The anion exchangeable capacity of the silylated materials is around 2 mmol g-1. The affinity of these materials for Cl -, Br-, I-, and NO3 - is quite different from those of conventional anion exchangeable layered double hydroxides (LDHs). Bim-Oct is stable at pH 1.0, which is in clear contrast to the behavior of LDHs. Bim-Oct exhibits a high capacity for sorption of sulfasalazine, a bulky prodrug. The release behavior of the accommodated sulfasalazine is largely dependent on the pH values of simulated gastric and intestinal fluids, suggesting that these novel layered anion exchangers are potentially applicable to drug delivery systems.",
    author = "Nobuyuki Takahashi and Hideo Hata and Kazuyuki Kuroda",
    year = "2010",
    month = "6",
    day = "8",
    doi = "10.1021/cm9037439",
    language = "English",
    volume = "22",
    pages = "3340--3348",
    journal = "Chemistry of Materials",
    issn = "0897-4756",
    publisher = "American Chemical Society",
    number = "11",

    }

    TY - JOUR

    T1 - Anion exchangeable layered silicates modified with ionic liquids on the interlayer surface

    AU - Takahashi, Nobuyuki

    AU - Hata, Hideo

    AU - Kuroda, Kazuyuki

    PY - 2010/6/8

    Y1 - 2010/6/8

    N2 - Novel layered materials with two-dimensionally arranged anion exchangeable sites in the interlayer space were prepared by immobilization of imidazolium chloride salts (1-butyl (or 1-octyl)-3-(3-triethoxysilylpropyl)-4,5- dihydroimidazolium chloride, abbreviated as BimSi(OEt)3Cl or OimSi(OEt)3Cl, respectively) containing terminal triethoxysilyl groups onto layered octosilicate via silylation. More than 80% of SiOH/SiO - groups on the silicate layers were silylated and they are denoted as Bim-Oct and Oim-Oct. The cation exchangeable sites on octosilicate were stoichiometrically converted to anion exchangeable sites. The confronting arrangement of SiOH/SiO- groups on octosilicate is essential for this stoichiometric conversion because the silylation reagents ideally react with the surface SiOH/SiO- groups to form bidentate immobilization on octosilicate. The anion exchangeable capacity of the silylated materials is around 2 mmol g-1. The affinity of these materials for Cl -, Br-, I-, and NO3 - is quite different from those of conventional anion exchangeable layered double hydroxides (LDHs). Bim-Oct is stable at pH 1.0, which is in clear contrast to the behavior of LDHs. Bim-Oct exhibits a high capacity for sorption of sulfasalazine, a bulky prodrug. The release behavior of the accommodated sulfasalazine is largely dependent on the pH values of simulated gastric and intestinal fluids, suggesting that these novel layered anion exchangers are potentially applicable to drug delivery systems.

    AB - Novel layered materials with two-dimensionally arranged anion exchangeable sites in the interlayer space were prepared by immobilization of imidazolium chloride salts (1-butyl (or 1-octyl)-3-(3-triethoxysilylpropyl)-4,5- dihydroimidazolium chloride, abbreviated as BimSi(OEt)3Cl or OimSi(OEt)3Cl, respectively) containing terminal triethoxysilyl groups onto layered octosilicate via silylation. More than 80% of SiOH/SiO - groups on the silicate layers were silylated and they are denoted as Bim-Oct and Oim-Oct. The cation exchangeable sites on octosilicate were stoichiometrically converted to anion exchangeable sites. The confronting arrangement of SiOH/SiO- groups on octosilicate is essential for this stoichiometric conversion because the silylation reagents ideally react with the surface SiOH/SiO- groups to form bidentate immobilization on octosilicate. The anion exchangeable capacity of the silylated materials is around 2 mmol g-1. The affinity of these materials for Cl -, Br-, I-, and NO3 - is quite different from those of conventional anion exchangeable layered double hydroxides (LDHs). Bim-Oct is stable at pH 1.0, which is in clear contrast to the behavior of LDHs. Bim-Oct exhibits a high capacity for sorption of sulfasalazine, a bulky prodrug. The release behavior of the accommodated sulfasalazine is largely dependent on the pH values of simulated gastric and intestinal fluids, suggesting that these novel layered anion exchangers are potentially applicable to drug delivery systems.

    UR - http://www.scopus.com/inward/record.url?scp=77953030697&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=77953030697&partnerID=8YFLogxK

    U2 - 10.1021/cm9037439

    DO - 10.1021/cm9037439

    M3 - Article

    VL - 22

    SP - 3340

    EP - 3348

    JO - Chemistry of Materials

    JF - Chemistry of Materials

    SN - 0897-4756

    IS - 11

    ER -