Effect of gold nanoparticles shape and size on the photophysicochemical behaviour of symmetric and asymmetric zinc phthalocyanines
Glutathione (GSH) capped Au nanotriangles (AuNTs–GSH) and nanospheres (AuNSs–GSH) are covalently linked to symmetric Zn phthalocyanine (ZnPc) substituted with phenoxy propanoic acid substituents only (complex 1) and two asymmetric ZnPc, each containing one phenoxy propanoic acid and three benzothiaz...
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| Language: | English |
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Journal of Luminescence
2020
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| Online Access: | https://www.sciencedirect.com/science/article/abs/pii/S0022231318313097 http://hdl.handle.net/11408/3849 |
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| author | Dube, Edith Nyokong, Tebello |
| author_facet | Dube, Edith Nyokong, Tebello |
| author_sort | Dube, Edith |
| collection | DSpace |
| description | Glutathione (GSH) capped Au nanotriangles (AuNTs–GSH) and nanospheres (AuNSs–GSH) are covalently linked to symmetric Zn phthalocyanine (ZnPc) substituted with phenoxy propanoic acid substituents only (complex 1) and two asymmetric ZnPc, each containing one phenoxy propanoic acid and three benzothiazole phenoxy moieties (complex 2), and one phenoxy propanoic acid and no other ligands (complex 3). The photophysicochemical behaviour of Pc complexes and their conjugates were studied. All conjugates displayed improved triplet and singlet oxygen quantum yields with decreases in fluorescence quantum yields compared to their respective Pc complexes. The conjugates of asymmetric complexes 2 and 3, afforded much higher triplet and singlet oxygen quantum yields compared to the symmetric complex 1, and could serve as good candidates for photodynamic therapy. |
| format | Article |
| id | ir-11408-3849 |
| institution | My University |
| language | English |
| publishDate | 2020 |
| publisher | Journal of Luminescence |
| record_format | dspace |
| spelling | ir-11408-38492022-06-27T13:49:06Z Effect of gold nanoparticles shape and size on the photophysicochemical behaviour of symmetric and asymmetric zinc phthalocyanines Dube, Edith Nyokong, Tebello gold nanotriangle nanospheres triplet quantum yield zinc phthalocyanines asymmetry Glutathione (GSH) capped Au nanotriangles (AuNTs–GSH) and nanospheres (AuNSs–GSH) are covalently linked to symmetric Zn phthalocyanine (ZnPc) substituted with phenoxy propanoic acid substituents only (complex 1) and two asymmetric ZnPc, each containing one phenoxy propanoic acid and three benzothiazole phenoxy moieties (complex 2), and one phenoxy propanoic acid and no other ligands (complex 3). The photophysicochemical behaviour of Pc complexes and their conjugates were studied. All conjugates displayed improved triplet and singlet oxygen quantum yields with decreases in fluorescence quantum yields compared to their respective Pc complexes. The conjugates of asymmetric complexes 2 and 3, afforded much higher triplet and singlet oxygen quantum yields compared to the symmetric complex 1, and could serve as good candidates for photodynamic therapy. 2020-10-23T11:30:02Z 2020-10-23T11:30:02Z 2019 Article 0022-2313 https://www.sciencedirect.com/science/article/abs/pii/S0022231318313097 http://hdl.handle.net/11408/3849 en Vol205 , 532 - 539; open Journal of Luminescence |
| spellingShingle | gold nanotriangle nanospheres triplet quantum yield zinc phthalocyanines asymmetry Dube, Edith Nyokong, Tebello Effect of gold nanoparticles shape and size on the photophysicochemical behaviour of symmetric and asymmetric zinc phthalocyanines |
| title | Effect of gold nanoparticles shape and size on the photophysicochemical behaviour of symmetric and asymmetric zinc phthalocyanines |
| title_full | Effect of gold nanoparticles shape and size on the photophysicochemical behaviour of symmetric and asymmetric zinc phthalocyanines |
| title_fullStr | Effect of gold nanoparticles shape and size on the photophysicochemical behaviour of symmetric and asymmetric zinc phthalocyanines |
| title_full_unstemmed | Effect of gold nanoparticles shape and size on the photophysicochemical behaviour of symmetric and asymmetric zinc phthalocyanines |
| title_short | Effect of gold nanoparticles shape and size on the photophysicochemical behaviour of symmetric and asymmetric zinc phthalocyanines |
| title_sort | effect of gold nanoparticles shape and size on the photophysicochemical behaviour of symmetric and asymmetric zinc phthalocyanines |
| topic | gold nanotriangle nanospheres triplet quantum yield zinc phthalocyanines asymmetry |
| url | https://www.sciencedirect.com/science/article/abs/pii/S0022231318313097 http://hdl.handle.net/11408/3849 |
| work_keys_str_mv | AT dubeedith effectofgoldnanoparticlesshapeandsizeonthephotophysicochemicalbehaviourofsymmetricandasymmetriczincphthalocyanines AT nyokongtebello effectofgoldnanoparticlesshapeandsizeonthephotophysicochemicalbehaviourofsymmetricandasymmetriczincphthalocyanines |