Logo JG-Universität MainzProf. Dr. Axel Müller

    

432. Lunkenbein, T.; Kamperman, M.; Li, Z.; Bojer, C.; Drechsler, M.; Förster, S.; Wiesner, U.; Müller, A.H.E.; Breu, J.: Direct Synthesis of Inverse Hexagonally Ordered Diblock Copolymer/Polyoxometalate Nanocomposite Films, J. Am. Chem. Soc. 134, 12685 (2012) -- DOI: 10.1021/ja304073t
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 (H3[PMo12O40], H3PMo). H3PMo units are selectively incorporated into the PDMAEMA domains due to electrostatic interactions between protonated PDMAEMA and PMo anions. Long solvophilic PB chains stabilized the PDMAEMA/H3PMo 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 H3PMo, 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.

There are additional file downloads belonging to this publication

Password

powered by php + PostgreSQL - last modified 2013-01-14- Impressum