Toward nanodevices: Synthesis and characterization of the nanoporous surfactant-encapsulated keplerate (DODA)(40)(NH4)(2)(H2O)(n)subset of Mo132O372(CH3COO)(30)(H2O)(72)
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.
%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
}