Nanostructured Metal/Carbon Composites from Heterobimetallic Block Copolymers with Controlled Magnetic Properties

Abstract

We reported the utilization of a series of heterobimetallic diblock copolymers to prepare different iron–cobalt/carbon and iron–cobalt phosphide/carbon magnetic materials. Through the control of compositions of ferrocene- and cobaltocenium-containing blocks, a transition of final inorganic materials from metal phosphide to metal alloy was observed. These metal elements were embedded on amorphous carbon films or encapsulated in crystallized multiwalled carbon nanotubes. Detailed magnetic characterization showed that all these inorganic materials were ferromagnetic under room temperature with great difference in their magnetic susceptibilities. The saturated magnetization was related with the weight fraction of phosphorus and cobalt, indicating the ability to control the magnetization of these inorganic materials via polymer compositions.

Charged Metallopolymer-Grafted Silica Nanoparticles for Antimicrobial Applications

“…We previously synthesized a cobaltocenium methacrylate monomer with ester and amide linkers for various applications and studies. 53–55 A similar procedure was followed to synthesize CoAEMAPF 6 by reacting cobaltocenium monoacid with 2-aminoethyl methacrylate hydrochloride in the presence of coupling agent N -(3-(dimethylamino)propyl)- N ′-ethylcarbodiimide (EDC).…”

Synthesis and X-ray Characterization of Cobalt Phosphide (Co2P) Nanorods for the Oxygen Reduction Reaction

“…20,28-32 Co 2 P NPs have been synthesized to support their applications in magnetics, 33 heterogeneous catalysis, 25,[34][35][36] energy storage, 37,38 and heavy-metal capture and recycling. 39 Recently, cobalt phosphide (Co 2 P NPs and CoP NRs) and other base-metal phosphides-synthesized via thermal decomposition in organic solvents-have also been reported to be excellent electrocatalysts for hydrogen evolution reaction (HER).…”

Binding of Cobaltocenium-Containing Polyelectrolytes with Anionic Probes

“…49 Recently, we reported the synthesis of side-chain cobaltocenium-containing polyelectrolytes and their applications as advanced materials. 50–53 In addition, side-chain cobaltocenium-containing polyelectrolytes were utilized as novel antimicrobial materials to kill bacteria. 54 These cobaltocenium-containing polyelectrolytes were able to rejuvenate the traditional β-lactam antibiotics by forming an ionic interaction between carboxylic anions and cationic cobaltocenium moieties to inhibit the degradation of drugs.…”