https://commons.ufh.ac.za/vital/access/manager/Index ${session.getAttribute("locale")} 5 Fluorescence “turn on” probe for bromide ion using nanoconjugates of glutathione-capped CdTe@ ZnS quantum dots with nickel tetraamino-phthalocyanine https://commons.ufh.ac.za/vital/access/manager/Repository/vital:44998 QD605-NiTAPc > QD621-NiTAPc. The mechanism of reaction is proposed.]]> Wed 03 Nov 2021 12:01:45 SAST ]]> Fluorescence “switch on” of conjugates of CdTe@ ZnS quantum dots with Al, Ni and Zn tetraamino-phthalocyanines by hydrogen peroxide https://commons.ufh.ac.za/vital/access/manager/Repository/vital:50966 QDs-NiTAPc (4.4 μM) > QDs-AlTAPc (9.8 μM) while the selectivity followed the order: QDs-NiTAPc > QDs-AlTAPc > QDs-ZnTAPc. The varying degree of sensitivity/selectivity and mechanism of detection is discussed in detail.]]> Tue 24 May 2022 15:47:43 SAST ]]> Nanoconjugates of CdTe@ ZnS quantum dots with cobalt tetraamino-phthalocyanine https://commons.ufh.ac.za/vital/access/manager/Repository/vital:50996 Tue 24 May 2022 15:40:37 SAST ]]> Probing the sensitive and selective luminescent detection of peroxynitrite using thiol-capped CdTe and CdTe@ ZnS quantum dots https://commons.ufh.ac.za/vital/access/manager/Repository/vital:45393 GSH–TGA–CdTe@ZnS>MPA–CdTe QDs. The varying degree of quenching is elucidated based on the QD–thiolate bond of CdTe@ZnS being more sensitive to oxidation from ONOO− than CdTe. The selectivity of the probe in the presence of co-existing species followed the order: GSH–TGA–CdTe@ZnS>MPA–TGA–CdTe@ZnS>MPA–CdTe QDs. QDs capped with MPA showed less selectivity for ONOO− than GSH. The best limit of detection (LOD) of 12.6 nM was obtained for MPA–TGA–CdTe@ZnS QDs. Time-resolved fluorescence measurements indicated that the interaction between ONOO− and the QDs is static in nature.]]> Sat 27 Nov 2021 14:07:54 SAST ]]>