Universität zu Köln

Lefarth, Jens ORCID: 0000-0003-3234-2032, Haseloer, Alexander, Kletsch, Lukas ORCID: 0000-0001-9970-6967, Klein, Axel ORCID: 0000-0003-0093-9619, Neudoerfl, Joerg and Griesbeck, Axel G. (2022). From energy to electron transfer photocatalysis (PenT -> PET): oxidative cyclobutane cleavage alters the product composition. Chem. Commun., 58 (93). S. 12999 - 13003. CAMBRIDGE: ROYAL SOC CHEMISTRY. ISSN 1364-548X

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Abstract

Photocatalytic [2+2]-cycloadditions between cyclic enones and electron-rich cyclic enol ethers are initiated by triplet-triplet energy transfer from an excited iridium photocatalyst to the enone acceptor. The composition of the resulting cycloadduct mixture shows a surprising time dependency of the cyclobutane stereoisomeric ratio which indicates that the products are not photostable under the reaction conditions. The isomerisation of the cycloadducts 3 by a photoinduced redox process points to a switch from triplet energy transfer (PenT) to photoinduced electron transfer (PET) catalysis.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Lefarth, Jens UNSPECIFIED orcid.org/0000-0003-3234-2032 UNSPECIFIED Haseloer, Alexander UNSPECIFIED UNSPECIFIED UNSPECIFIED Kletsch, Lukas UNSPECIFIED orcid.org/0000-0001-9970-6967 UNSPECIFIED Klein, Axel UNSPECIFIED orcid.org/0000-0003-0093-9619 UNSPECIFIED Neudoerfl, Joerg UNSPECIFIED UNSPECIFIED UNSPECIFIED Griesbeck, Axel G. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-658753
DOI:	10.1039/d2cc04693h
Journal or Publication Title:	Chem. Commun.
Volume:	58
Number:	93
Page Range:	S. 12999 - 13003
Date:	2022
Publisher:	ROYAL SOC CHEMISTRY
Place of Publication:	CAMBRIDGE
ISSN:	1364-548X
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language BOND Multiple languages Chemistry, Multidisciplinary Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/65875