title: Differential detection of enantiomeric gaseous analytes using carbon black-chiral polymer composite, chemically sensitive resistors.
abstract: Carbon black-chiral polymer composites were used to provide diagnostic differential resistance responses in the presence of enantiomers of chiral gaseous analytes. Vapors of (+)-2-butanol and (-)-2-butanol, (+)-α-pinene and (-)-α-pinene, (+)-epichlorohydrin and (-)-epichlorohydrin, and methyl (+)-2-chloropropionate and methyl (-)-2-chloropropionate were generated and passed over a chemically sensitive carbon black-poly((R)-3-hydroxybutyrate-co-(R)-3-hydroxyvalerate) (77% butyrate) composite resistor. Each enantiomer of a pair produced a distinct relative differential resistance change on the chiral detector, whereas both enantiomers of a set produced identical signals on achiral carbon black-poly(ethylene-co-vinyl acetate) (82% ethylene) detectors.
authors.affiliation: Division of Chemistry and Chemical Engineering, California Institute of Technology, Pasadena, California 91125.
authors.forename: E J
authors.initials: EJ
authors.lastname: Severin
authors.forename: R D
authors.initials: RD
authors.lastname: Sanner
authors.forename: B J
authors.initials: BJ
authors.lastname: Doleman
authors.forename: N S
authors.initials: NS
authors.lastname: Lewis