Chiral permselectivity in surface-modified nanoporous opal films.
Nanoporous 7 mum thin opal films comprising 35 layers of 200 nm diameter SiO2 spheres were assembled on Pt electrodes and modified with chiral selector moieties on the silica surface. Diffusion of chiral redox species through the opals was studied by cyclic voltammetry. The chiral opal films demonstrate high selectivity for transport of one enantiomer over the other. This chiral permselectivity is attributed to the surface-facilitated transport utilizing noncovalent interactions between the chiral permeant molecules and surface-bound chiral selectors.
Cichelli
Julie
J
Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, USA.
Zharov
Ilya
I
D002626:Chemistry, Pharmaceutical / Q000379:methods; D004563:Electrochemistry; D004566:Electrodes; D005296:Ferrous Compounds / Q000737:chemistry; D008567:Membranes, Artificial; D000075163:Metallocenes; D015394:Molecular Structure; D036103:Nanotechnology / Q000379:methods; D016062:Porosity; D012822:Silicon Dioxide / Q000737:chemistry*; D013237:Stereoisomerism; D013499:Surface Properties
D005296:Ferrous Compounds; D008567:Membranes, Artificial; D000075163:Metallocenes; C029019:opoka; D012822:Silicon Dioxide; C004998:ferrocene