dc.contributor.author | García Ruiz, Carmen | |
dc.contributor.author | Scholtes, Maarten J. | |
dc.contributor.author | Ariese, Freek | |
dc.contributor.author | Gooijer, Cees | |
dc.date.accessioned | 2008-02-25T10:53:17Z | |
dc.date.available | 2008-02-25T10:53:17Z | |
dc.date.issued | 2005 | |
dc.identifier.bibliographicCitation | Talanta, 2005, v. 66, p. 641-645 | en |
dc.identifier.issn | 0039-9140 | |
dc.identifier.uri | http://hdl.handle.net/10017/1329 | |
dc.description.abstract | Inclusion complexes between camphorquinone (CQ) and cyclodextrins (CDs) in deoxygenated aqueous solutions are shown to exhibit relatively strong room temperature phosphorescence (RTP). Among the various CDs tested, α-CD showed the strongest RTP signals. Interestingly, these signals differed significantly for the two enantiomers of CQ; the phosphorescence lifetime of (+)-CQ was about four times longer than that of (−)-CQ, being 352 ± 16 and 89 ± 6 μs, respectively. This enantiomeric selectivity is attributed to a difference in dissociation rates (competing with the radiative emission process) for the diastereoisomeric inclusion complexes dealt with, which have a 2:1 stoichiometry (α-CD:CQ:α-CD). Time-resolved RTP detection using different delay times enables the determination of the two enantiomers in a mixture without involving a separation technique. The minimum detectable fraction of (+)-CQ in a 2 mM sample was 13%. | en |
dc.description.sponsorship | C. Garcia-Ruiz gratefully thanks the European Commission
for a postdoctoral Marie Curie individual fellowship
(Contract No. HPMF-CT-2002-01826). | en |
dc.format.mimetype | application/pdf | en |
dc.language.iso | eng | en |
dc.publisher | Elsevier | en |
dc.rights | © Elsevier, 2004 | en |
dc.subject | Camphorquinone | en |
dc.subject | Inclusion complex | en |
dc.subject | Room temperature phosphorescence | en |
dc.subject | Phosphorescence lifetime | en |
dc.title | Enantioselective detection of chiral phosphorescent analytes in cyclodextrin complexes | en |
dc.type | info:eu-repo/semantics/article | en |
dc.subject.eciencia | Ciencia | es_ES |
dc.subject.eciencia | Química analítica e industrial | es_ES |
dc.subject.eciencia | Science | en |
dc.subject.eciencia | Chemistry, analytic and technical | en |
dc.contributor.affiliation | Universidad de Alcalá. Departamento de Química Analítica e Ingeniería Química | |
dc.relation.publisherversion | http://dx.doi.org/10.1016/j.talanta.2004.12.010 | |
dc.type.version | info:eu-repo/semantics/publishedVersion | en |
dc.identifier.doi | 10.1016/j.talanta.2004.12.010 | |
dc.relation.projectID | info:eu-repo/grantAgreement/EC/H2020/MSCA-IF/HPMF-CT-2002-01826 | |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | en |