Redox−Transmetalation Process as a Generalized Synthetic Strategy for Core−Shell Magnetic Nanoparticles
Citations Over TimeTop 10% of 2005 papers
Abstract
Although multicomponent core-shell type nanomaterials are one of the highly desired structural motifs due to their simultaneous multifunctionalities, the fabrication strategy for such nanostructures is still in a primitive stage. Here, we present a redox-transmetalation process that is effective as a general protocol for the fabrication of high quality and well-defined core-shell type bimetallic nanoparticles on the sub-10 nm scale. Various core-shell type nanomaterials including Co@Au, Co@Pd, Co@Pt, and Co@Cu nanoparticles are fabricated via transmetalation reactions. Compared to conventional sequential reduction strategies, this transmetalation process has several advantages for the fabrication of core-shell type nanoparticles: (i) no additional reducing agent is needed and (ii) spontaneous shell layer deposition occurs on top of the core nanoparticle surface and thus prevents self-nucleation of secondarily added metals. We also demonstrate the versatility of these core-shell structures by transferring Co@Au nanoparticles from an organic phase to an aqueous phase via a surface modification process. The nanostructures, magnetic properties, and reaction byproducts of these core-shell nanoparticles are spectroscopically characterized and identified, in part, to confirm the chemical process that promotes the core-shell structure formation.
Related Papers
- → A Neutral Gold(III)–Boron Transmetalation(2014)70 cited
- → Mechanistic Exploration of the Transmetalation and Reductive Elimination Events Involving PdIV–Abnormal NHC Complexes in Suzuki–Miyaura Coupling Reactions: A DFT Study(2018)33 cited
- → Gold and Rhodium Transmetalation: Mechanistic Insights and Dual-Metal Reactivity(2011)48 cited
- → Advances in transmetalation reactions originated from organozirconium compounds(2017)22 cited
- → Transmetalation Reactions Producing Organocopper Reagents(2002)16 cited