- Title
- Synthesis, photophysicochemical studies of adjacently tetrasubstituted binaphthalo-phthalocyanines
- Creator
- Seotsanyana-Mokhosi, Itumeleng
- Creator
- Chen, Ji-Yao
- Creator
- Nyokong, Tebello
- Subject
- To be catalogued
- Date Issued
- 2005
- Date
- 2005
- Type
- text
- Type
- article
- Identifier
- http://hdl.handle.net/10962/289294
- Identifier
- vital:56616
- Identifier
- xlink:href="https://doi.org/10.1142/S108842460500040X"
- Description
- Adjacent binaphthalo-phthalocyanines tetra-substituted with phenoxy (4a), 4-carboxyphenoxy (4b) and 4-t-butylphenoxy (4c) groups, as well as the di-substituted 4-carboxyphenoxy (5b) have been synthesized and characterized. The photophysical and photochemical behavior of 4a-c, were compared with those of the corresponding di-substituted derivatives, (5a-c). The secondary substituents on the phenoxy ring have an influence on the aggregation of the molecules and hence on their photophysical properties. All of the complexes exhibit a relatively good conversion of energy from the triplet-excited state to the singlet oxygen. The less aggregated molecule (4c), has the highest singlet oxygen quantum yield. For all the molecules, fluorescence yields are low and they all have relatively shorter triplet lifetimes compared with the unsubstituted zinc phthalocyanine. Increasing the number of ring substituents on these rigid MPc complexes (from complexes 5 to 4) showed a general increase in the triplet state lifetimes and singlet oxygen quantum yields, and a decrease in stability.
- Format
- computer
- Format
- online resource
- Format
- application/pdf
- Format
- 1 online resource (11 pages)
- Format
- Publisher
- Elsevier
- Language
- English
- Relation
- Journal of Porphyrins and Phthalocyanines
- Relation
- Seotsanyana-Mokhosi, I., Chen, J.Y. and Nyokong, T., 2005. Synthesis, photophysicochemical studies of adjacently tetrasubstituted binaphthalo-phthalocyanines. Journal of Porphyrins and Phthalocyanines, 9(05), pp.316-325
- Relation
- Journal of Porphyrins and Phthalocyanines volume 9 number 05 p. 316 2005 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://0-www.worldscientific.com.wam.seals.ac.za/page/permissions)
- Rights
- Closed Access
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Collections
Nyokong, Tebello (Distinguished Professor)
RU Department of Chemistry
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|---|---|---|---|---|---|---|---|
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