%0 Journal Article %1 Volkmer2000 %A Volkmer, D %A Chesne, A Du %A Kurth, DG %A Schnablegger, H %A Lehmann, P %A Koop, MJ %A Muller, A %C 1155 16TH ST, NW, WASHINGTON, DC 20036 USA %D 2000 %I AMER CHEMICAL SOC %J JOURNAL OF THE AMERICAN CHEMICAL SOCIETY %K dgkurth %N 9 %P 1995-1998 %T Toward nanodevices: Synthesis and characterization of the nanoporous surfactant-encapsulated keplerate (DODA)(40)(NH4)(2)(H2O)(n)subset of Mo132O372(CH3COO)(30)(H2O)(72) %V 122 %X We describe the spontaneous self-assembly and the superstructure of a discrete surfactant-encapsulated cluster, (DODA)(40)(NH4)(2)(H2O)(n)subset of Mo132O372(CH3COO)(30)(H2O)(72) (2, n approximate to 50), which consists of a hollow giant isopolyoxomolybdate core covered by a hydrophobic shell of dimethyldioctadecylammonium (DODA) cations. The structural characterization of these nanoporous core-shell particles is based on small-angle X-ray scattering (SAXS) data on solutions of the encapsulated clusters, TEM investigations, FT;LR and W-vis spectroscopy, as well as determination of the molecular area of 2 by Langmuir film investigations. Computer modeling of the solvent-accessible surface of the encapsulated cluster yields a central cavity with a volume of 1.5 nm(3) that is occupied by approximately 50 H2O molecules. The cluster bears (Mo-O) 9-ring openings with an average diameter of 0.43 nm. The covered surface area of 84 Angstrom(2)/DODA indicates a rather tight packing of the amphiphile at the cluster surface. Due to the unique supramolecular architecture of 2 as well as its high solubility in common organic solvents, this compound shows promising perspectives for future applications in host-guest chemistry and homogeneous size-selective catalysis.

@article{Volkmer2000, abstract = {We describe the spontaneous self-assembly and the superstructure of a discrete surfactant-encapsulated cluster, (DODA)(40)(NH4)(2){[}(H2O)(n)subset of Mo132O372(CH3COO)(30)(H2O)(72)] (2, n approximate to 50), which consists of a hollow giant isopolyoxomolybdate core covered by a hydrophobic shell of dimethyldioctadecylammonium (DODA) cations. The structural characterization of these nanoporous core-shell particles is based on small-angle X-ray scattering (SAXS) data on solutions of the encapsulated clusters, TEM investigations, FT;LR and W-vis spectroscopy, as well as determination of the molecular area of 2 by Langmuir film investigations. Computer modeling of the solvent-accessible surface of the encapsulated cluster yields a central cavity with a volume of 1.5 nm(3) that is occupied by approximately 50 H2O molecules. The cluster bears (Mo-O) 9-ring openings with an average diameter of 0.43 nm. The covered surface area of 84 Angstrom(2)/DODA indicates a rather tight packing of the amphiphile at the cluster surface. Due to the unique supramolecular architecture of 2 as well as its high solubility in common organic solvents, this compound shows promising perspectives for future applications in host-guest chemistry and homogeneous size-selective catalysis.}, added-at = {2011-01-12T11:47:32.000+0100}, address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA}, affiliation = {Volkmer, D (Reprint Author), Univ Bielefeld, Dept Inorgan Chem 1, POB 100 131, D-33501 Bielefeld, Germany. Univ Bielefeld, Dept Inorgan Chem 1, D-33501 Bielefeld, Germany. Max Planck Inst Polymer Res, D-55021 Mainz, Germany. Max Planck Inst Colloids \& Interfaces, D-14424 Potsdam, Germany.}, author = {Volkmer, D and Chesne, A Du and Kurth, DG and Schnablegger, H and Lehmann, P and Koop, MJ and Muller, A}, biburl = {https://www.bibsonomy.org/bibtex/2b15fb09fbef9039e5fdb52ddf82918a5/lctm}, doc-delivery-number = {294ME}, interhash = {ea0bcd3391a38f9a219cb83d99abe5ea}, intrahash = {b15fb09fbef9039e5fdb52ddf82918a5}, issn = {0002-7863}, journal = {JOURNAL OF THE AMERICAN CHEMICAL SOCIETY}, journal-iso = {J. Am. Chem. Soc.}, keywords = {dgkurth}, keywords-plus = {SMALL-ANGLE SCATTERING}, language = {English}, month = {MAR 8}, number = 9, number-of-cited-references = {22}, pages = {1995-1998}, publisher = {AMER CHEMICAL SOC}, subject-category = {Chemistry, Multidisciplinary}, times-cited = {124}, timestamp = {2011-01-12T11:47:32.000+0100}, title = {Toward nanodevices: Synthesis and characterization of the nanoporous surfactant-encapsulated keplerate (DODA)(40)(NH4)(2){[}(H2O)(n)subset of Mo132O372(CH3COO)(30)(H2O)(72)]}, type = {Article}, unique-id = {ISI:000085914400019}, volume = 122, year = 2000 }