- Title
- Synthesis and photophysical studies of phthalocyanine–gold nanoparticle conjugates
- Creator
- Nombona, Nolwazi, Antunes, Edith M, Litwinski, Christian, Nyokong, Tebello
- Subject
- To be catalogued
- Date
- 2011
- Type
- text
- Type
- article
- Identifier
- http://hdl.handle.net/10962/248438
- Identifier
- vital:51686
- Identifier
- xlink:href="https://doi.org/10.1039/C1DT11151E"
- Description
- This work reports on the synthesis, characterization and photophysical studies of phthalocyanine–gold nanoparticle conjugates. The phthalocyanine complexes are: tris-(5-trifluoromethyl-2-mercaptopyridine)-2-(carboxy)phthalocyanine (3), 2,9,17,23-tetrakis-[(1, 6-hexanedithiol) phthalocyaninato]zinc(II) (8) and [8,15,22-tris-(naptho)-2(amidoethanethiol) phthalocyanato] zinc(II)(10). The gold nanoparticles were characterized using transmission electron microscopy, X-ray diffraction, atomic force microscopy and UV-vis spectroscopy where the size was confirmed to be ∼5 nm. The phthalocyanine Au nanoparticle conjugates showed lower fluorescence quantum yield values with similar fluorescence lifetimes compared to the free phthalocyanines. The Au nanoparticle conjugates of 3 and 10 also showed higher triplet quantum yields of 0.69 to 0.71, respectively. A lower triplet quantum yield was obtained for the conjugate compared to free phthalocyanine for complex 8. The triplet lifetimes ranged from 70 to 92 μs for the conjugates and from 110 to 304 μs for unbound Pc complexes.
- Format
- computer, online resource, application/pdf, 1 online resource (9 pages), pdf
- Publisher
- Royal Society of Chemistry
- Language
- English
- Relation
- Dalton Transactions, Nombona, N., Antunes, E., Litwinski, C. and Nyokong, T., 2011. Synthesis and photophysical studies of phthalocyanine–gold nanoparticle conjugates. Dalton Transactions, 40(44), pp.11876-11884, Dalton Transactions volume 40 number 44 p. 11876 2011 1477-9226
- Rights
- Publisher
- Rights
- Use of this resource is governed by the terms and conditions of the Royal Society of Chemistry Terms and Conditions Statement (https://0-www.rsc.org.wam.seals.ac.za/help-legal/)
- Rights
- Open Access
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- Visitors: 1020
- Downloads: 83
Collections
Antunes, Edith Martins (Dr)
Nyokong, Tebello (Distinguished Professor)
RU DST/NRF SARChI for Medicinal Chemistry and Nanotechnology
RU Department of Chemistry
| Thumbnail | File | Description | Size | Format | |||
|---|---|---|---|---|---|---|---|
| View Details Download | SOURCE1 | Synthesis and photophysical studies of phthalocyanine–gold nanoparticle conjugates.pdf | 755 KB | Adobe Acrobat PDF | View Details Download |