Abstract
We report on the synthesis of 2,(3)- (peripheral) and 1,(4)- (non-peripheral) (2-mercaptopyridine)phthalocyanine complexes of titanium (IV) oxide (5 and 6 respectively), and tantalum (III) hydroxide (7, peripheral only), their photochemical and photophysical parameters and the photocatalytic oxidation of cyclohexene in the presence of gold nanoparticles (AuNPs). The singlet oxygen quantum yield values increased in the presence of AuNPs, for complexes 5 and 6. The percentage conversion values for cyclohexene using 5, 6 and 7 were 27%, 20% and 14%, respectively. These values increased considerably in the presence of AuNPs, except complex for 7. The products obtained include cyclohexene oxide, 2-cyclohexen-1-ol, 2-cyclohexene-1-one and 1,2-cyclohexanediol. Low values of singlet oxygen quantum yields favour the formation of 1,2-cyclohexanediol.
| Original language | English |
|---|---|
| Pages (from-to) | 38-46 |
| Number of pages | 9 |
| Journal | Journal of Photochemistry and Photobiology A: Chemistry |
| Volume | 221 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 10 Jun 2011 |
Funding
This work was supported by the Department of Science and Technology (DST) and National Research Foundation (NRF) of South Africa through DST/NRF South African Research Chairs Initiative for Professor of Medicinal Chemistry and Nanotechnology and Rhodes University.
| Funders | Funder number |
|---|---|
| National Research Foundation | |
| Rhodes University | |
| Department of Science and Technology, Ministry of Science and Technology, India |
Keywords
- Cyclohexene
- Gold nanoparticles
- Photocatalysis
- Photodegradation
- Phthalocyanines
- Singlet oxygen quantum yield
- Tantalum
- Titanium
- Triplet lifetimes
- Triplet quantum yields