Synthesis, complete characterization, and enantioselective electrokinetic separation of functionalized ruthenium complex enantiomers

Electrokinetic chromatography was employed to separate the enantiomers of two novel functionalized ruthenium(II) complexes with different polypyridyl coordination spheres. The use of anionic carboxymethyl-beta-cyclodextrin as chiral mobile phase additive resulted in maximum efficiency and resolution for the enantiomer separation of both transition metal complexes. The syntheses of the [4-(3-bydroxypropyl)-4'-methyl-2,2'-bipyridine]-bis(2,2'-bipyridine) ruthenium (II)-bis(tetrafluoroborate) and [4(3-hydroxypropyl)-4'-methyl-2,2'-bipyridine] -bis (4,4'-dimethyl-2,2'-bipyridine) ruthenium (II)-bis(tetrafluoroborate) complexes and their complete characterization by means of two-dimensional H-1 and C-13{H-1} NMR techniques (H-1-H-1 COSY and H-1-C-13 HMQC) as well as elemental analyses and MALDI-TOFMS are described in detail. The functionalized complexes can be used as building blocks for further reactions with polymers, biopolymers, surfaces and nanoparticles. (C) 2004 Wiley-Liss, Inc.