Gel permeation chromatography as a multifunctional processor for nanocrystal purification and on-column ligand exchange chemistry.

ABSTRACT: This article illustrates the use of gel permeation chromatography (GPC, organic-phase size exclusion chromatography) to separate nanocrystals from weakly-bound small molecules, including solvent, on the basis of size. A variety of colloidal inorganic nanocrystals of different size, shape, composition, and surface termination are shown to yield purified samples with greatly reduced impurity concentrations. Additionally, the method is shown to be useful in achieving a change of solvent without requiring precipitation of the nanocrystals. By taking advantage of the different rates at which small molecules and nanoparticles travel through the column, we show that it is furthermore possible to use the GPC column as a multi-functional flow reactor that can accomplish in sequence the steps of ini

SUBMITTER: Shen Y 

PROVIDER: S-EPMC6022040 | biostudies-literature | 2016 Sep

REPOSITORIES: biostudies-literature