- Title
- Direct nonlinear optical absorption measurements of asymmetrical zinc (II) phthalocyanine when covalently linked to semiconductor quantum dots
- Creator
- Mgidlana, Sithi
- Creator
- Sen, Pinar
- Creator
- Nyokong, Tebello
- Subject
- To be catalogued
- Date Issued
- 2020
- 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
- Format
- online resource
- Format
- application/pdf
- Format
- 1 online resource (12 pages)
- Format
- Publisher
- Elsevier
- Language
- English
- Relation
- Journal of Molecular Structure
- Relation
- 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
- Relation
- 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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Nyokong, Tebello (Distinguished Professor)
RU DST/NRF SARChI for Medicinal Chemistry and Nanotechnology
RU Department of Chemistry
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| View Details Download | SOURCE1 | Direct nonlinear optical absorption measurements of asymmetrical zinc (1).pdf | 779 KB | Adobe Acrobat PDF | View Details Download |