title: A magnetic biomimetic nanocatalyst for cleaving phosphoester and carboxylic ester bonds under mild conditions.
abstract: [Structure: see text] As a result of the unique surface structure of nanospheres, Asp and His residues supported on a 12 nm maghemite nanoparticle worked collaboratively as a biomimetic nanocatalyst for hydrolyzing paraoxon (phosphoester) and 4-nitrophenyl acetate (carboxylic ester) in Milli-Q water (pH 7.0) at 37 degrees C, without employing extremes of pH or heavy metals. Our nanocatalyst could be facilely recovered via magnetic concentration. The isolated catalyst exhibited long-term stability, showing no significant loss of its catalytic activity for repeated uses after 3 months.
authors.affiliation: Department of Chemistry and Biochemistry, Southern Illinois University, Carbondale, Illinois 62901-4409, USA.
authors.forename: Yan
authors.initials: Y
authors.lastname: Zheng
authors.forename: Chuansong
authors.initials: C
authors.lastname: Duanmu
authors.forename: Yong
authors.initials: Y
authors.lastname: Gao
mesh_terms: D000595:Amino Acid Sequence; D000596:Amino Acids / Q000737:chemistry; D001224:Aspartic Acid / Q000737:chemistry; D002384:Catalysis; D004952:Esters; D006639:Histidine / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D007202:Indicators and Reagents; D018716:Molecular Mimicry; D015394:Molecular Structure; D043942:Nanotubes / Q000737:chemistry*; D009943:Organophosphorus Compounds / Q000737:chemistry*
chemical_list: D000596:Amino Acids; D004952:Esters; D007202:Indicators and Reagents; D009943:Organophosphorus Compounds; D001224:Aspartic Acid; D006639:Histidine