Direct synthesis of inverse hexagonally ordered diblock copolymer/polyoxometalate nanocomposite films

T. Lunkenbein, M.M.G. Kamperman, Z. Li, C. Bojer, M. Drechsler, S. Forster, U. Wiesner, A. Muller, J. Breu

Research output: Contribution to journalArticleAcademicpeer-review

43 Citations (Scopus)

Abstract

Nanostructured inverse hexagonal polyoxometalate composite films were cast directly from solution using poly(butadiene-block-2-(dimethylamino)ethyl methacrylate) (PB-b-PDMAEMA) diblock copolymers as structure directing agents for phosphomolybdic acid (H(3)[PMo(12)O(40)], H(3)PMo). H(3)PMo units are selectively incorporated into the PDMAEMA domains due to electrostatic interactions between protonated PDMAEMA and PMo(3-) anions. Long solvophilic PB chains stabilized the PDMAEMA/H(3)PMo aggregates in solution and reliably prevented macrophase separation. The choice of solvent is crucial. It appears that all three components, both blocks of the diblock copolymer as well as H(3)PMo, have to be soluble in the same solvent which turned out to be tetrahydrofuran, THF. Evaporation induced self-assembly resulted in highly ordered inverse hexagonal nanocomposite films as observed from transmission electron microscopy and small-angle X-ray scattering. This one-pot synthesis may represent a generally applicable strategy for integrating polyoxometalates into functional architectures and devices.
Original languageEnglish
Pages (from-to)12685-12692
Number of pages8
JournalJournal of the American Chemical Society
Volume134
Issue number30
DOIs
Publication statusPublished - 2012

Keywords

  • surfactant-encapsulated polyoxometalate
  • block-copolymer surfactants
  • transition-metal oxides
  • lyotropic phases
  • catalysis
  • nanoparticles
  • composites
  • complexes
  • chemistry
  • clusters

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  • Cite this

    Lunkenbein, T., Kamperman, M. M. G., Li, Z., Bojer, C., Drechsler, M., Forster, S., Wiesner, U., Muller, A., & Breu, J. (2012). Direct synthesis of inverse hexagonally ordered diblock copolymer/polyoxometalate nanocomposite films. Journal of the American Chemical Society, 134(30), 12685-12692. https://doi.org/10.1021/ja304073t