- Title
- Direct nonlinear optical absorption measurements of asymmetrical zinc (II) phthalocyanine when covalently linked to semiconductor quantum dots
- Creator
- Mgidlana, Sithi, Sen, Pinar, Nyokong, Tebello
- Subject
- To be catalogued
- Date
- 2020
- Type
- text
- Type
- article
- Identifier
- http://hdl.handle.net/10962/186056
- Identifier
- vital:44459
- Identifier
- xlink:href="https://doi.org/10.1016/j.molstruc.2020.128729"
- Description
- We report on nonlinear optical properties of tris[(4-tert-butyl)-2-thio (phenyl)acetic acid (1) and tris(dimethyl-5-(3,4-phenoxy) isophthalate (2) phthalocyaninato zinc (II) complexes. The synthesized complexes were covalently conjugated to glutathione-capped CdTe/ZnSe/ZnO quantum dots. We observed an increase in triplet quantum yield with corresponding decrease in fluorescence quantum yield of conjugates compared to Pc complexes alone. Z-scan technique was employed to experimentally test the nonlinear optical response of complexes and nanoconjugates in solution at laser excitation wavelength of 532 nm with 7 ns pulse. Nonlinear absorption coefficient, third-order optical susceptibility and optical limiting threshold of the materials were obtained from the Z-scan data. The nonlinear absorption parameters improved in the presence of CdTe/ZnSe/ZnO, with 1 and 1-CdTe/ZnSe/ZnO, giving the best results due to the presence of electron donating substituents.
- Format
- computer, online resource, application/pdf, 1 online resource (12 pages), pdf
- Publisher
- Elsevier
- Language
- English
- Relation
- Journal of Molecular Structure, Mgidlana, S., Şen, P. and Nyokong, T., 2020. Direct nonlinear optical absorption measurements of asymmetrical zinc (II) phthalocyanine when covalently linked to semiconductor quantum dots. Journal of Molecular Structure, 1220, p.128729, Journal of Molecular Structure volume 1220 p. 128729 2020 0022-2860
- Rights
- Publisher
- Rights
- Use of this resource is governed by the terms and conditions of the Elsevier Terms and Conditions Statement (https://www.elsevier.com/legal/elsevier-website-terms-and-conditions)
- Rights
- Closed Access
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Collections
RU DST/NRF SARChI for Medicinal Chemistry and Nanotechnology
Nyokong, Tebello (Distinguished Professor)
RU Department of Chemistry
| Thumbnail | File | Description | Size | Format | |||
|---|---|---|---|---|---|---|---|
| View Details Download | SOURCE1 | Direct nonlinear optical absorption measurements of asymmetrical zinc (1).pdf | 779 KB | Adobe Acrobat PDF | View Details Download |