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Jeena V, Robinson RS. Convenient photooxidation of alcohols using dye sensitised semiconductors in combination with silver nitrate and TEMPO--an electron paramagnetic resonance study. Dalton Trans. 2012;41(11):3134-7doi: 10.1039/c2dt12030e.
Jeena, V., & Robinson, R. S. (2012). Convenient photooxidation of alcohols using dye sensitised semiconductors in combination with silver nitrate and TEMPO--an electron paramagnetic resonance study. Dalton transactions (Cambridge, England : 2003), 41(11), 3134-7. https://doi.org/10.1039/c2dt12030e
Jeena, Vineet, and Robinson, Ross S. "Convenient photooxidation of alcohols using dye sensitised semiconductors in combination with silver nitrate and TEMPO--an electron paramagnetic resonance study." Dalton transactions (Cambridge, England : 2003) vol. 41,11 (2012): 3134-7. doi: https://doi.org/10.1039/c2dt12030e
Jeena V, Robinson RS. Convenient photooxidation of alcohols using dye sensitised semiconductors in combination with silver nitrate and TEMPO--an electron paramagnetic resonance study. Dalton Trans. 2012 Mar 21;41(11):3134-7. doi: 10.1039/c2dt12030e. Epub 2012 Jan 25. PMID: 22278171.
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Dalton Trans. 2012 Mar 21;41(11):3134-7. doi: 10.1039/c2dt12030e. Epub 2012 Jan 25.

Convenient photooxidation of alcohols using dye sensitised semiconductors in combination with silver nitrate and TEMPO--an electron paramagnetic resonance study.

Dalton transactions (Cambridge, England : 2003)

Vineet Jeena, Ross S Robinson

Affiliations

  1. Department of Chemistry, University of KwaZulu-Natal, Scottsville, Pietermaritzburg, South Africa.

PMID: 22278171 DOI: 10.1039/c2dt12030e

Abstract

A mechanistic investigation into the photooxidation of alcohols using dye sensitised titanium dioxide and dye sensitised zinc oxide is described. The varying yields using the two photocatalysts have been explained using electron paramagnetic resonance (EPR) spectroscopy, which indicated that electron injection occurs in the dye sensitised ZnO system but is sluggish in the dye sensitised TiO(2) system. Due to the failure of the electron injection step, a 'break' in the photooxidative system occurs resulting in a decrease in the conversion of benzyl alcohol to benzaldehyde for the dye sensitised TiO(2) system.

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