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Reference type: Journal
Authors: Paik P, Gedanken A, Mastai Y
Article Title: Chiral-mesoporous-polypyrrole nanoparticles: Its chiral recognition abilities and use in enantioselective separation.
Publication date: 2010
Journal: Journal of Materials Chemistry
Volume: 20
Issue: (20)
Page numbers: 4085-4093.
DOI: 10.1039/c000232a

Abstract: Chiral-mesoporous-polypyrrole (CMPPy) nanoparticles are synthesized by templating chiral block copolymers (CBCs) of poly(ethylene oxide), (PEO) and chiral l-/d- glutamic acid [PEO-b-(l-/d-GluA)10] and blocks of chiral l-/d-phenylalanine [PEO-b-(l-/d-Phe)10]. The well ordered chiral mesopores of nanoparticles are characterized by HRTEM and BET. The CMPPy nanoparticles have well organized pores with sizes ca. 3.5-3.7 nm in diameter and with a high surface area. These CMPPy nanoparticles are able to recognize chiral molecules. Using the selective chiral recognition abilities, the chiral resolution of the copolymer-extracted CMPPy nanoparticles and the chiral separation kinetics using a racemic mixture of valine are probed by circular dichroism (CD) and optical polarimetry. Further, the chiral resolution of the CMPPy is confirmed with a racemic mixture of alanine. The chiral selectivity factor is 5.05 for a specific enantiomer which is adsorbed preferably by the CMPPy. These results allow a new approach towards the enantiomeric separation and other enantiomeric applications of novel CMPPy. - 2010 The Royal Society of Chemistry
Template and target information: chiral block copolymers, CBC, PEO-b-(l-/d-GluA)10, PEO-b-(l-/d-Phe)10


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