Surfactant-encapsulated clusters (SECs): (DODA)(20)(NH4)[H3Mo57V6(NO)(6)O-183(H2O)(18)], a case study

Kurth DG, Lehmann P, Volkmer D, Colfen H, Koop MJ, Müller A, Du Chesne A (2000)
CHEMISTRY-A EUROPEAN JOURNAL 6(2): 385-393.

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We present a comprehensive study of the partially reduced polyoxomolybdate [H3Mo57V6(NO)(6)O-183(H2O)(18)](21-) encapsulated in a shell of dimethyldioctadecylammonium (DODA) surfactant molecules. Treatment of an aqueous solution of (NH4)(21)[H3Mo57V6-(NO)(6)O-183(H2O)(18)]. 65H(2)O (1a) with a trichloromethane solution of the surfactant leads to instant transfer of the encapsulated complex anion into the organic phase. Results from vibrational spectroscopy, analytical ultracentrifugation, small-angle X-ray scattering, transmission electron microscopy, elemental analysis, and Langmuir compression isotherms are consistent with a single polyoxometalate core encapsulated within a shell of 20 DODA molecules. The molar mass of the supramolecular assembly is 20 249 g mol(-1) and the diameter is 3.5nm. A material with the empirical formula (DODA)(20)(NH4)[H-3-Mo57V6(NO)(6)O-183(H2O)(18)] (2) was isolated as a dark violet solid, which readily dissolves in organic solvents. Slow evaporation of solutions of 2 on solid substrates forces the hydrophobic particles to aggregate into a cubic lattice. Annealing these so-formed films at elevated temperature causes de-wetting with terrace formation similar to liquid crystals and block copolymers. Compound 2 forms a stable Langmuir monolayer at the air-water interface; Langmuir-Blodgett multilayers are readily prepared by repeated transfer of monolayers on solid substrates. The films were characterized by optical ellipsometry, Brewster angle microscopy, transmission electron microscopy, and X-ray reflectance.
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Kurth DG, Lehmann P, Volkmer D, et al. Surfactant-encapsulated clusters (SECs): (DODA)(20)(NH4)[H3Mo57V6(NO)(6)O-183(H2O)(18)], a case study. CHEMISTRY-A EUROPEAN JOURNAL. 2000;6(2):385-393.
Kurth, D. G., Lehmann, P., Volkmer, D., Colfen, H., Koop, M. J., Müller, A., & Du Chesne, A. (2000). Surfactant-encapsulated clusters (SECs): (DODA)(20)(NH4)[H3Mo57V6(NO)(6)O-183(H2O)(18)], a case study. CHEMISTRY-A EUROPEAN JOURNAL, 6(2), 385-393.
Kurth, D. G., Lehmann, P., Volkmer, D., Colfen, H., Koop, M. J., Müller, A., and Du Chesne, A. (2000). Surfactant-encapsulated clusters (SECs): (DODA)(20)(NH4)[H3Mo57V6(NO)(6)O-183(H2O)(18)], a case study. CHEMISTRY-A EUROPEAN JOURNAL 6, 385-393.
Kurth, D.G., et al., 2000. Surfactant-encapsulated clusters (SECs): (DODA)(20)(NH4)[H3Mo57V6(NO)(6)O-183(H2O)(18)], a case study. CHEMISTRY-A EUROPEAN JOURNAL, 6(2), p 385-393.
D.G. Kurth, et al., “Surfactant-encapsulated clusters (SECs): (DODA)(20)(NH4)[H3Mo57V6(NO)(6)O-183(H2O)(18)], a case study”, CHEMISTRY-A EUROPEAN JOURNAL, vol. 6, 2000, pp. 385-393.
Kurth, D.G., Lehmann, P., Volkmer, D., Colfen, H., Koop, M.J., Müller, A., Du Chesne, A.: Surfactant-encapsulated clusters (SECs): (DODA)(20)(NH4)[H3Mo57V6(NO)(6)O-183(H2O)(18)], a case study. CHEMISTRY-A EUROPEAN JOURNAL. 6, 385-393 (2000).
Kurth, DG, Lehmann, P, Volkmer, D, Colfen, H, Koop, MJ, Müller, Achim, and Du Chesne, A. “Surfactant-encapsulated clusters (SECs): (DODA)(20)(NH4)[H3Mo57V6(NO)(6)O-183(H2O)(18)], a case study”. CHEMISTRY-A EUROPEAN JOURNAL 6.2 (2000): 385-393.
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In situ fabrication of flower-like gold nanoparticles in surfactant-polyoxometalate-hybrid spherical assemblies.
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PMID: 20411186

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