- Title
- Modulation of the optical properties of chiral porphyrin dimers by introducing bridged chiral amide-bonds
- Creator
- Qin, Mingfeng, Zhang, Zhen, Zhu, Weihua, Mack, John, Soy, Rodah C, Nyokong, Tebello, Liang, Xu
- Subject
- To be catalogued
- Date
- 2021
- Type
- text
- Type
- article
- Identifier
- http://hdl.handle.net/10962/190815
- Identifier
- vital:45031
- Identifier
- xlink:href="https://doi.org/10.1142/S1088424620500492"
- Description
- The d/l-enantiomers of a series of three Zn(II)tetraarylporphyrin dimers were synthesized and isolated by incorporating a bridging amide-bonded xanthene moiety at the para-position of one of the meso-aryl rings. The electronic structures and optical properties were modulated by incorporating chiral amino acid moieties into the amide-bonding moieties of the xanthene bridge that contain methyl, tolyl and 2-methylindole substituents. A cofacial dimer was formed in the presence of 1,4-diazabicyclo[2.2.2]octane (DABCO) resulting in a significant red shift of the B band, due to a relative destabilization of the HOMO, which has large MO coefficients on the pyrrole nitrogens. The sign sequences observed in the B band region of the CD spectra due to the presence of the chiral amino acid moieties were modified due to this change in geometry. Significant CD intensity is also observed in the B band region of the CD spectra of anion radical species during in situ spectroelectrochemical measurements.
- Format
- computer, online resource, application/pdf, 1 online resource (10 pages), pdf
- Publisher
- World Scientific
- Language
- English
- Relation
- Journal of Porphyrins and Phthalocyanines, Qin, M., Zhang, Z., Zhu, W., Mack, J., Soy, R.C., Nyokong, T. and Liang, X., 2021. Modulation of the optical properties of chiral porphyrin dimers by introducing bridged chiral amide-bonds. Journal of Porphyrins and Phthalocyanines, 25(01), pp.37-46, Journal of Porphyrins and Phthalocyanines volume 25 number 01 p. 37 2021 1099-1409
- Rights
- Publisher
- Rights
- Use of this resource is governed by the terms and conditions of the World Scientific Copyright and Permissions Statement (https://0www.worldscientific.com.wam.seals.ac.za/page/permissions)
- 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 | SOURCE1 | Modulation of the optical properties of chiral porphyrin dimers.pdf | 660 KB | Adobe Acrobat PDF | View Details |