- Title
- Unsymmetrically Substituted Nickel Triazatetra-Benzcorrole and Phthalocynanine Complexes: Conjugation to Quantum Dots and Applications as Fluorescent “Turn ON” Sensors
- Creator
- Adegoke, Oluwasesan
- Creator
- Nyokong, Tebello
- Type
- Article
- Identifier
- vital:7311
- Identifier
- http://hdl.handle.net/10962/d1020403
- Description
- We report on the design and application of fluorescent nanoprobes based on the covalent linking of L-glutathione-capped CdSe@ZnS quantum dots (QDs) to newly synthesized unsymmetrically substituted nickel mercaptosuccinic acid triazatetra-benzcorrole (3) and phthalocyanine (4) complexes. Fluorescence quenching of the QDs occurred on conjugation to complexes 3 or 4. The nanoprobes were selectively screened in the presence of different cations and Hg2+ showed excellent affinity in “turning ON” the fluorescence of the nanoprobes. Experimental results showed that the sensitivity of QDs-4 towards Hg2+ was much higher than that of QDs-3 nanoprobe. The mechanism of reaction has been elucidated based on the ability of Hg2+ to coordinate with the sulphur atom of the Ni complex ring and apparently “turn ON” the fluorescence of the linked QDs.
- Description
- Original publication is available at http://dx.doi.org/10.1007/s10895-013-1317-4
- Format
- 11 p.
- Format
- Publisher
- Springer
- Language
- English
- Relation
- Adegoke, O. & Nyokong, T. 2014. Unsymmetrically Substituted Nickel Triazatetra-Benzcorrole and Phthalocynanine Complexes: Conjugation to Quantum Dots and Applications as Fluorescent “Turn ON” Sensors. Journal of Fluorescence, 24(2):481-491. Available: http://dx.doi.org/10.1007/s10895-013-1317-4.
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Nyokong, Tebello (Distinguished Professor)