- Title
- Singlet oxygen generating properties of different sizes of charged Graphene quantum dot Nanoconjugates with a positively charged Phthalocyanine
- Creator
- Matshitse, Refilwe, Nyokong, Tebello
- Subject
- To be catalogued
- Date
- 2018
- Type
- text
- Type
- article
- Identifier
- http://hdl.handle.net/10962/187614
- Identifier
- vital:44680
- Identifier
- xlink:href="https://doi.org/10.1007/s10895-018-2247-y"
- Description
- Various sizes of graphene quantum dots (GQDs) denoted as GQD2, GQD6 and GQD10 (increasing in size) were non-covalently attached to 2,9,16,23-tetrakis[4-(N-methylpyridyloxy)]-phthalocyanine (ZnTPPcQ) to form GQDs-ZnTPPcQ nanoconjugates. X-ray photoelectron spectroscopy (XPS) showed that increasing sizes of GQDs decreases the atomic concentrations of oxygen, which leads to blue shift in spectra of the GQDs. Relative to Pcs alone (0.03), the presence of GQDs improved the singlet oxygen quantum yields with the following values: GQD2-ZnTPPcQ (0.17), GQD6-ZnTPPcQ (0.27) and GQD10-ZnTPPcQ (0.11). GQD2-ZnTPPcQ nanoconjugate system had the most ZnTPPcQ loading, but did not generate the most singlet oxygen species due to aggregation. This study shows that, the quantity of oxygen, size and quality of GQDs as well as amount of Pc loading are amongst the vital properties to consider when constructing GQD-nanoconjugate systems with optimal singlet oxygen quantum yields.
- Format
- computer, online resource, application/pdf, 1 online resource (12 pages), pdf
- Publisher
- SpringerLink
- Language
- English
- Relation
- Journal of Flourescense, Matshitse, R. and Nyokong, T., 2018. Singlet oxygen generating properties of different sizes of charged Graphene quantum dot Nanoconjugates with a positively charged Phthalocyanine. Journal of fluorescence, 28(3), pp.827-838, Journal of Flourescense volume 28 number 3 p. 827 2018 1573-4994
- Rights
- Publisher
- Rights
- Use of this resource is governed by the terms and conditions of the SpringerLink Terms of Use Statement (https://link.springer.com/termsandconditions)
- Rights
- Open Access
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Collections
Nyokong, Tebello (Distinguished Professor)
RU DST/NRF SARChI for Medicinal Chemistry and Nanotechnology
RU Department of Chemistry
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