Redox Photocatalysis with Water-Soluble Core Shell CdSe-ZnS Quantum Dots

Timothee Chauvire (1) , Jean-Marie Mouesca (2) , Didier Gasparutto (3) , Jean-Luc Ravanat (3) , Colette Lebrun (1) , Marina Gromova (2) , Pierre-Henri Jouneau (4) , Jérôme Chauvin (5) , Serge Gambarelli (2) , Vincent Maurel (2)

1 RICC - Reconnaissance Ionique et Chimie de Coordination
2 RM - Magnetic Resonance
3 LAN - Laboratoire Lésions des Acides Nucléiques
4 LEMMA - Laboratoire d'Etude des Matériaux par Microscopie Avancée
5 DCM - CIRE - Département de Chimie Moléculaire - Chimie Inorganique Redox

The use of CdSe-ZnS type I quantum.clots as redox photocatalysts with visible light in water is investigated by monitoring the oxidation reaction of 8-oxo-2'-deoxyguanosine and the reduction of nitrophenylalanine derivatives. The detection of reaction intermediates and the identification and quantitation of reaction products establish that both reactions are photocatalyzed simultaneously by CdSe-ZnS type I quantum dots. The photocatalyzed reactions are observed without the need for sacrificial reactants and with high turnover numbers (>400). These results demonstrate that CdSe-ZnS type I quantum dots can work efficiently as redox photocatalysts in water solution.

Mots clés: Visible-Light Irradiation; One-Electron Oxidation; Charge Separation; Semiconductor Nanocrystals; Nanorod Heterostructures; Hydrogen-Production; Correlation-Energy; Singlet Oxygen; Hole Transfer; Efficient

Domaines: Physique [physics]

Timothee Chauvire, Jean-Marie Mouesca, Didier Gasparutto, Jean-Luc Ravanat, Colette Lebrun, et al.. Redox Photocatalysis with Water-Soluble Core Shell CdSe-ZnS Quantum Dots. Journal of Physical Chemistry C, 2015, 119 (31), pp.17857-17866. ⟨10.1021/acs.jpcc.5b04396⟩. ⟨hal-01588163⟩