title: pH sensitive organic-inorganic layered nanomaterials by self-assembly of indigocarmine between the inorganic layers.
abstract: New pH sensitive organic-inorganic intercalation compounds having different interlayer spacing were prepared. Zn-Al layered double hydroxide (LDH) is an anion exchangeable inorganic layered compound whose interlayer spacing is 0.76 nm. In the reactions of indigocarmine (IDC) with the calcined Zn-Al LDH at pH = 7 (LDH-IDC7), interlayer spacing increased to 2.25 nm. The interlayer spacing of LDH-IDC7 decreased to 1.89 nm by the treatment in basic solution. In the reaction of IDC with the calcined Zn-Al LDH at pH = 10 (LDH-IDC10), interlayer spacing of the intercalation compounds was 1.89 nm. The interlayer spacing of these intercalation compounds was changed reversibly by the treatments in acidic or basic solution.
authors.affiliation: Department of Chemistry and Chemical Engineering, Yamagata University, 4-3-16 Jonan, Yonezawa, Yamagata 992-8510, Japan.
authors.forename: Sumikazu
authors.initials: S
authors.lastname: Ogata
authors.forename: Jun-ichi
authors.initials: J
authors.lastname: Kadokawa
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Tagaya
mesh_terms: D006863:Hydrogen-Ion Concentration; D007203:Indigo Carmine / Q000737:chemistry*; D007364:Intercalating Agents; D049329:Nanostructures / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods; D013055:Spectrophotometry, Infrared; D014867:Water / Q000737:chemistry; D014961:X-Ray Diffraction
chemical_list: D007364:Intercalating Agents; D014867:Water; D007203:Indigo Carmine