Photorelease of triplet and singlet oxygen from dioxygen complexes

0367782 - ÚACH 2012 RIV NL eng J - Journal Article
Wagnerová, Dana Marie - Lang, Kamil
Photorelease of triplet and singlet oxygen from dioxygen complexes.
Coordination Chemistry Reviews. Roč. 255, 23-24 (2011), s. 2904-2911. ISSN 0010-8545. E-ISSN 1873-3840
R&D Projects: GA ČR GAP207/10/1447; GA ČR GAP208/10/1678
Institutional research plan: CEZ:AV0Z40320502
Keywords : singlet oxygen * triplet oxygen * photochemical elimination * photorelease * Dioxygen complex
Subject RIV: CA - Inorganic Chemistry
Impact factor: 12.110, year: 2011

Photolysis of some dioxygen transition metal complexes leads to the release of oxygen molecules in two electronic states, namely, in the ground triplet state 3Σg− and the lowest excited singlet state 1Δg. The reaction involves electron transfer from the dioxygen moiety to the central metal ion. In the reported cases, the photoreaction of peroxo complexes is activated by ligand-to-metal charge transfer excitation. The mechanism of singlet oxygen photorelease relates to intramolecular energy transfer and differs in principle from the photosensitization process. Consequently, the photorelease can be viewed as a new route to dioxygen activation by spin inversion of the ground state oxygen to singlet oxygen.
Permanent Link: http://hdl.handle.net/11104/0202335