title: Layered assemblies of a dialuminum-substituted silicotungstate trimer and the reversible interlayer cation-exchange properties.
abstract: Two polyoxometalate assemblies, TBA(9)[{γ-H(2)SiW(10)O(36)Al(2)(μ-OH)(2)(μ-OH)}(3)] (1; TBA = tetra-n-butylammonium) and TBA(6)Li(3)[{γ-H(2)SiW(10)O(36)Al(2)(μ-OH)(2)(μ-OH)}(3)]·18H(2)O (2), were synthesized by trimerization of a dialuminum-substituted silicotungstate monomer. Both 1 and 2 possessed a layered structure composed of a basal sheet unit [TBA(3){γ-H(2)SiW(10)O(36)Al(2)(μ-OH)(2)(μ-OH)}(3)](6-) and interlayer cations. The interconversion between 1 and 2 reversibly took place through interlayer cation exchange.
authors.affiliation: Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Tokyo 113-8656, Japan.
authors.forename: Yuji
authors.initials: Y
authors.lastname: Kikukawa
authors.forename: Kazuya
authors.initials: K
authors.lastname: Yamaguchi
authors.forename: Mitsuhiro
authors.initials: M
authors.lastname: Hibino
authors.forename: Noritaka
authors.initials: N
authors.lastname: Mizuno
mesh_terms: D000535:Aluminum / Q000737:chemistry; D002412:Cations; D018360:Crystallography, X-Ray; D006860:Hydrogen Bonding; D008958:Models, Molecular; D015394:Molecular Structure; D010100:Oxygen / Q000737:chemistry; D011108:Polymers / Q000737:chemistry*; D053838:Scattering, Small Angle; D012825:Silicon / Q000737:chemistry; D014414:Tungsten / Q000737:chemistry; D017973:Tungsten Compounds / Q000737:chemistry*; D014961:X-Ray Diffraction; D000099294:Polyoxometalates
chemical_list: D000535:Aluminum; D002412:Cations; D010100:Oxygen; D011108:Polymers; D012825:Silicon; D014414:Tungsten; D017973:Tungsten Compounds; C102296:polyoxometalate I; D000099294:Polyoxometalates