Synthesis, thin-film self-assembly, and pyrolysis of ruthenium-containing polyferrocenylsilane block copolymers

Abstract

The self-assembly of a ruthenium-containing polyferrocenylsilane in bulk and thin films yielded spherical or cylindrical domains in a PS matrix; pyrolysis provided a route to bimetallic Fe/Ru NPs for potential catalytic applications.

Nanostructured Bimetallic Block Copolymers as Precursors to Magnetic FePt Nanoparticles

“…Ordered hexagonally-packed arrays of iron domains embedded in the PS matrix have been realized in the literature. , Furthermore, iron NPs (i.e., ∼6.5 nm average size) in a C/SiC matrix could be obtained after pyrolysis. While the current work described in this manuscript was in progress, the formation of FeRu NPs for potential catalytic applications from the pyrolysis of a BCP containing Fe and Ru was described . Cobalt-based nanomaterials have also been accessed using BCPs with cobalt-carbonyl clusters attached to ethynyl units − or half-sandwich cobaltocenium/(η 5 -cyclopentadienyl)­(η 4 -cyclobutadiene)­cobalt moieties. ,, Nanostructuring of the BCP through cylindrical domain formation has been shown to alter the magnetic properties of the resulting cobalt NPs .…”