Investigation of ordered shell nanoparticles as catalytic platforms for organic synthesis

[摘要] In mixed ethanol: water solvent I find that the ripple domain can modulate the catalyst rate in a non-monotonic manner, and when compared to a homo-ligand non-ripple catalyst particle, the modulated catalyst rate can be either enhanced or attenuated depending on the ligand ratio used. In pure water, non-ripple, homo-ligand catalyst particles have higher catalytic rates than ripple-domain particles; however the binding constant and attempt frequency of these types of particles is modulated by changes in the ripple domain, and provides evidence that the monolayer structure is affecting catalysis by producing a local environment capable of holding a reactive intermediate state. The results provide a beginning link between nanoparticle monolayer morphology and catalysis, and open the way to developing nanoparticles as selective catalysts based on changes in the structure of the monolayer.

[发布机构] Massachusetts Institute of Technology