Iron/iron oxide nanoparticle sequestration of catalytic metal impurities from aqueous media and organic reaction products

Janet E Macdonald; Joel A Kelly; Jonathan G C Veinot

doi:10.1021/la7011827

Iron/iron oxide nanoparticle sequestration of catalytic metal impurities from aqueous media and organic reaction products

Langmuir. 2007 Sep 11;23(19):9543-5. doi: 10.1021/la7011827. Epub 2007 Aug 18.

Authors

Janet E Macdonald¹, Joel A Kelly, Jonathan G C Veinot

Affiliation

¹ Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada, T6G 2G2.

PMID: 17705514
DOI: 10.1021/la7011827

Abstract

A host of transition metal ions (Co2+, Cu2+, Ni2+, RuX+, RhX+, Pd2+, Ag+, and Pt4+) were sequestered from aqueous media upon exposure to FexOy@Fe nanoparticles. Concentrations were lowered from approximately 100 ppm to below 40 ppb. This technique was extended to the removal of catalytic ions from the products of a "Click" cycloaddition and a Heck coupling in organic solvents. Residual metal concentrations in organic reaction products matched or exceeded pharmaceutical standards.