Characterization and purification of supramolecular metal complexes using gel-permeation chromatography.
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.
Graves
Christopher R
CR
Department of Chemistry, Institute for Environmental Catalysis, and Center for Nanofabrication and Molecular Self-Assembly, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA.
Merlau
Melissa L
ML
Morris
Gregory A
GA
Sun
Shih-Sheng
SS
Nguyen
SonBinh T
ST
Hupp
Joseph T
JT