Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Michael E. Koscho"'
Publikováno v:
Analytica Chimica Acta. 661:60-66
A pair of pseudo -enantiomers, tertiary amine appended trans -4-hydroxyproline derivatives were designed, synthesized, and evaluated as chiral selectors for enantiomer analysis of DNB-amino acid and their amides, in single-stage electrospray ionizati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5e5ab7d4f36712404533d7f9ad6c2730
https://doi.org/10.1016/j.aca.2009.12.011
https://doi.org/10.1016/j.aca.2009.12.011
Publikováno v:
International Journal of Mass Spectrometry. 288:44-50
A pair of pseudoenantiomers, anilide derivatives of N-pivaloylproline were prepared and used as chiral selectors for enantiomer discrimination of amides or esters of N-(3,5-dinitrobenzoyl)amino acids in single-stage electrospray ionization/mass spect
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::97fffa9e253bc1132ed8d86a31bfc2c8
https://doi.org/10.1016/j.ijms.2009.07.011
https://doi.org/10.1016/j.ijms.2009.07.011
Autor:
William H. Pirkle, Michael E. Koscho
Publikováno v:
Tetrahedron: Asymmetry. 16:3345-3351
A chiral solvating agent (CSA) based on the chiral selector used in the Whelk-O 1 chiral stationary phase (CSP) was prepared and its scope evaluated. This chiral selector possesses a cleft flanked with aromatic groups and produces upfield chemical sh
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::80b47ebff5e8a164b82d5ee4c53ff691
https://doi.org/10.1016/j.tetasy.2005.08.032
https://doi.org/10.1016/j.tetasy.2005.08.032
Publikováno v:
Tetrahedron: Asymmetry. 16:3147-3153
Designed to distinguish between the enantiomers of compounds possessing commonly occurring structural features, the chiral selector used in the chiral stationary phase (CSP) 1 (Whelk-O1) is broadly applicable. In an effort to further the understandin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7f00d0a81fe5df5f0538796d87a0d1ac
https://doi.org/10.1016/j.tetasy.2005.08.027
https://doi.org/10.1016/j.tetasy.2005.08.027
Publikováno v:
Tetrahedron: Asymmetry. 16:801-807
Chiral recognition by positive ion electrospray ionization (ESI) mass spectrometry is demonstrated through the adaptation of chromatographically derived chiral recognition systems. Solutions of soluble analogues of chiral selectors used in Pirkle-typ
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c270503551cb11e497614a00b0e9fb6e
https://doi.org/10.1016/j.tetasy.2004.12.028
https://doi.org/10.1016/j.tetasy.2004.12.028
Publikováno v:
Chirality. 17:456-463
The ability to use mixtures of deprotonated N-(3,5-dinitrobenzoyl)amino acids as chiral selectors for the determination of enantiomeric composition by electrospray ionization-mass spectrometry is demonstrated. For each experiment, two N-(3,5-dinitrob
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3e04f03d0f6afdcc8fc80445e49768de
https://doi.org/10.1002/chir.20188
https://doi.org/10.1002/chir.20188
Publikováno v:
Analytical Chemistry. 75:1748-1753
Vapor detectors formed from composites of conductors and insulating organic polymers have been tailored to produce increased sensitivity toward specific classes of analyte vapors. Upon exposure to acetic acid at 1% of its vapor pressure, detectors co
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3bbe1ed2b4b980653721cc495961f8ca
https://doi.org/10.1021/ac020412l
https://doi.org/10.1021/ac020412l
Publikováno v:
Analytical Chemistry. 74:1307-1315
Arrays of vapor detectors have been formed through addition of varying mass fractions of the plasticizer diethylene glycol dibenzoate to carbon black-polymer composites of poly(vinyl acetate) (PVAc) or of poly(N-vinylpyrrolidone). Addition of plastic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d356bfaa21903458c7a2f6cb4f62c915
https://doi.org/10.1021/ac011054+
https://doi.org/10.1021/ac011054+
Autor:
Michael E. Koscho, William H. Pirkle
Publikováno v:
Journal of Chromatography A. 840:151-158
Utilizing the immobilized-target strategy, the structure of a proline-derived chiral stationary phase was optimized for use in the preparative chromatographic separation of the enantiomers of two chiral selectors used in commercial chiral stationary
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4ec6a731d55a55e847d2eaaa7ec71b76
https://doi.org/10.1016/s0021-9673(99)00222-8
https://doi.org/10.1016/s0021-9673(99)00222-8
Autor:
William H. Pirkle, Michael E. Koscho
Publikováno v:
Journal of Chromatography A. 761:65-70
Designed to distinguish between the enantiomers of compounds having certain rather common structural features, the chiral selector used in chiral stationary phase (CSP) 1 columns is broadly applicable. The validity of the chiral recognition mechanism
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::993749ca66974d97a94c17f47e8a00cb
https://doi.org/10.1016/s0021-9673(96)00794-7
https://doi.org/10.1016/s0021-9673(96)00794-7