Please use this identifier to cite or link to this item: https://doi.org/10.1366/000370203322102889
DC FieldValue
dc.titleDetermination of enantiomeric excess using the ultraviolet-circular dichroism and the high-performance liquid chromatography-circular dichroism methods
dc.contributor.authorChen, L.
dc.contributor.authorZhao, Y.
dc.contributor.authorGao, F.
dc.contributor.authorGarland, M.
dc.date.accessioned2014-06-17T08:31:19Z
dc.date.available2014-06-17T08:31:19Z
dc.date.issued2003-07
dc.identifier.citationChen, L., Zhao, Y., Gao, F., Garland, M. (2003-07). Determination of enantiomeric excess using the ultraviolet-circular dichroism and the high-performance liquid chromatography-circular dichroism methods. Applied Spectroscopy 57 (7) : 797-804. ScholarBank@NUS Repository. https://doi.org/10.1366/000370203322102889
dc.identifier.issn00037028
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/66520
dc.description.abstractTwo useful numerical methods using ultraviolet (UV) and circular dichroism (CD) spectroscopies are proposed to determine enantiomeric excess (e.e). An algorithm is also proposed to generate self-consistent pure R and S enantiomer reference spectra. After all pure reference spectra are generated, a simulated annealing algorithm is applied to minimize the mismatch between the experimental spectra and the spectra after a least-squares fit. Optimal factors for R and S enantiomers are then used to determine e.e. The ultraviolet-circular dichroism (UV-CD) method uses the combined UV and CD spectra in a composite form, while the high-performance liquid chromatography (HPLC)-CD method only employs the CD spectra with the total concentrations of R plus S enantiomers provided by HPLC using a non-chiral stationary phase. Both methods were successfully tested on mixtures with known composition and then applied to real experimental data (unknown compositions). Compared with the UV-CD method, the results show that excellent results are more readily obtained using the HPLC-CD method. With the systems studied, the latter usually provided outstanding estimations of e.e with low error percentages.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1366/000370203322102889
dc.sourceScopus
dc.subjectEnantiomeric excess
dc.subjectEnantiomers
dc.subjectHigh-performance liquid chromatography-circular dichroism
dc.subjectHPLC-CD
dc.subjectPure reference spectra
dc.subjectSimulated annealing
dc.subjectUltraviolet-circular dichroism
dc.subjectUV-CD
dc.typeArticle
dc.contributor.departmentCHEMICAL & ENVIRONMENTAL ENGINEERING
dc.description.doi10.1366/000370203322102889
dc.description.sourcetitleApplied Spectroscopy
dc.description.volume57
dc.description.issue7
dc.description.page797-804
dc.description.codenAPSPA
dc.identifier.isiut000184358600011
Appears in Collections:Staff Publications

Show simple item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

10
checked on Nov 25, 2020

WEB OF SCIENCETM
Citations

12
checked on Nov 25, 2020

Page view(s)

238
checked on Nov 23, 2020

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.