title: Characterization and purification of supramolecular metal complexes using gel-permeation chromatography.
abstract: Gel-permeation chromatography (GPC) has been used to analyze transition-metal-based squares, triangles, and related supramolecular complexes. Using rhenium-containing molecular squares of different sizes, a linear calibration curve has been established, which was used for confirming the relative sizes of other assemblies. GPC can also discriminate cyclic trimers and tetramers of a dirhodium building block. Preparative GPC has been used to resolve macroscopic samples of a rhenium-based supramolecular mixture into pure syn and anti isomers. A mixture of "triangle" and "square" has also been successfully separated.
authors.affiliation: Department of Chemistry, Institute for Environmental Catalysis, and Center for Nanofabrication and Molecular Self-Assembly, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA.
authors.forename: Christopher R
authors.initials: CR
authors.lastname: Graves
authors.forename: Melissa L
authors.initials: ML
authors.lastname: Merlau
authors.forename: Gregory A
authors.initials: GA
authors.lastname: Morris
authors.forename: Shih-Sheng
authors.initials: SS
authors.lastname: Sun
authors.forename: SonBinh T
authors.initials: ST
authors.lastname: Nguyen
authors.forename: Joseph T
authors.initials: JT
authors.lastname: Hupp