- Title
- Optical limiting properties of 3, 5-dipyrenylvinyleneBODIPY dyes at 532 nm
- Creator
- Kubheka, Gugu, Sanusi, Kayode, Mack, John, Nyokong, Tebello
- Subject
- To be catalogued
- Date
- 2018
- Type
- text
- Type
- article
- Identifier
- http://hdl.handle.net/10962/237938
- Identifier
- vital:50567
- Identifier
- xlink:href="https://doi.org/10.1016/j.saa.2017.10.021"
- Description
- The optical limiting (OL) properties of 3,5-dipyrenylvinyleneBODIPY dyes that contain both electron withdrawing and donating moieties have been investigated by using the z-scan technique at 532 nm in the nanosecond pulse range. The extension of the π-conjugation at the 3,5-positions with pyrenylvinylene groups results in a ca. 200 nm red shift of the main BODIPY spectral band to ca. 700 nm, so there is relatively weak absorbance at 532 nm under ambient light conditions. Reverse saturable absorbance (RSA) profiles are observed in response to incident pulsed laser light that is consistent with a two photon absorption-assisted excited state absorption (ESA) mechanism in CH2Cl2 solution and when the dyes are embedded in poly(bisphenol carbonate A) (PBC) polymer thin films. This demonstrates that 3,5-divinyleneBODIPY dyes are potentially suitable for use in OL applications, since limiting threshold fluence (Ilim) values of below 0.95 J cm−2 are observed when thin films are prepared.
- Format
- computer, online resource, application/pdf, 1 online resource (8 pages), pdf
- Publisher
- Elsevier
- Language
- English
- Relation
- Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, Kubheka, G., Sanusi, K., Mack, J. and Nyokong, T., 2018. Optical limiting properties of 3, 5-dipyrenylvinyleneBODIPY dyes at 532 nm. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 191, pp.357-364, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy volume 191 p. 357 2018 1386-1425
- 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
Mack, John (Associate Prof)
RU DST/NRF SARChI for Medicinal Chemistry and Nanotechnology
Nyokong, Tebello (Distinguished Professor)
RU Department of Chemistry
SDG 03. Good Health and Well-Being
| Thumbnail | File | Description | Size | Format | |||
|---|---|---|---|---|---|---|---|
| View Details Download | SOURCE1 | Optical limiting properties of 3, 5-diphenyldibenzo-azaBODIPY at 532 nm.pdf | 2 MB | Adobe Acrobat PDF | View Details Download |