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dc.contributor.authorKELLY, JOHNen
dc.contributor.authorGOUNKO, IOURIen
dc.date.accessioned2013-08-14T13:48:36Z
dc.date.available2013-08-14T13:48:36Z
dc.date.issued2012en
dc.date.submitted2012en
dc.identifier.citationKeane, P.M., Gallagher, S.A., Magno, L.M., Leising, M.J., Clark, I.P., Greetham, G.M., Towrie, M., (...), Quinn, S.J, Photophysical studies of CdTe quantum dots in the presence of a zinc cationic porphyrin, Dalton Transactions, 41, 42, 2012, 13159-13166en
dc.identifier.otherYen
dc.identifier.urihttp://hdl.handle.net/2262/67055
dc.descriptionPUBLISHEDen
dc.description.abstractThe photophysical properties of 2.3 nm thioglycolic acid (TGA) coated CdTe quantum dots (QDs) prepared by a reflux method have been studied in the presence of cationic meso-tetrakis(4-Nmethylpyridyl) zinc porphyrin (ZnTMPyP4). Addition of the CdTe QDs to the porphyrin in H2O results in a marked red-shift and hypochromism in the porphyrin absorption spectrum, indicative of a non-covalent binding interaction with the QD surface. Only low equivalents of the quantum dot were required for complete quenching of the porphyrin fluorescence revealing that one quantum dot may quench more than one porphyrin. Similarly addition of porphyrin to the quantum dot provided evidence for very efficient quenching of the CdTe photoluminescence, suggesting the formation of CdTe?porphyrin aggregates. Definitive evidence for such aggregates was gathered using small angle X-ray spectroscopy (SAXS). Ultrafast transient absorption data are consistent with very rapid photoinduced electron transfer (1.3 ps) and the resultant formation of a long-lived porphyrin species.en
dc.description.sponsorshipThis publication has emanated from research conducted with the financial support of Science Foundation Ireland under Grant Numbers 07/IN.1/I1862 RFP/007/CHEF437 and 10/RFP/ CAP2915, the EU for funded access to STFC (App 1110017) and start up funding from the School of Chemistry and Chemical Biology.en
dc.format.extent13159-13166en
dc.language.isoenen
dc.relation.ispartofseriesDalton Transactionsen
dc.relation.ispartofseries41en
dc.relation.ispartofseries42en
dc.rightsYen
dc.subjectCdTe quantum dotsen
dc.subject.lcshCdTe quantum dotsen
dc.titlePhotophysical studies of CdTe quantum dots in the presence of a zinc cationic porphyrinen
dc.typeJournal Articleen
dc.contributor.sponsorEuropean Union (EU)en
dc.contributor.sponsorScience Foundation Ireland (SFI)en
dc.contributor.sponsorScience Foundation Ireland (SFI)en
dc.contributor.sponsorScience Foundation Ireland (SFI)en
dc.type.supercollectionscholarly_publicationsen
dc.type.supercollectionrefereed_publicationsen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/jmkellyen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/igounkoen
dc.identifier.rssinternalid82260en
dc.identifier.doihttp://dx.doi.org/10.1039/c2dt30741cen
dc.relation.ecprojectidinfo:eu-repo/grantAgreement/EC/FP7/RFP/007/CHEF437
dc.contributor.sponsorGrantNumberSTFC (App 1110017)en
dc.contributor.sponsorGrantNumber10/RFP/ CAP2915en
dc.contributor.sponsorGrantNumber07/IN.1/I1862en
dc.contributor.sponsorGrantNumberRFP/007/CHEF437en
dc.subject.TCDThemeNanoscience & Materialsen


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