Capture of Singlet Oxygen Modulates Host-Guest Behavior of Coordination Cages.

Autor: Jahović I; Department of Chemistry, University of Cambridge, Lensfield Road, CB2 1EW, Cambridge, UK., Yang Y; Department of Chemistry, University of Cambridge, Lensfield Road, CB2 1EW, Cambridge, UK., Ronson TK; Department of Chemistry, University of Cambridge, Lensfield Road, CB2 1EW, Cambridge, UK., Nitschke JR; Department of Chemistry, University of Cambridge, Lensfield Road, CB2 1EW, Cambridge, UK.
Jazyk: angličtina
Zdroj: Angewandte Chemie (International ed. in English) [Angew Chem Int Ed Engl] 2023 Sep 25; Vol. 62 (39), pp. e202309589. Date of Electronic Publication: 2023 Aug 23.
DOI: 10.1002/anie.202309589
Abstrakt: The anthracene panels of two tetrahedral M II 4 L 6 cages, where M II =Co II or Fe II , were found to react with photogenerated singlet oxygen ( 1 O 2 ) in a hetero-Diels-Alder reaction. ESI-MS analysis showed the cobalt(II) cages to undergo complete transformation of all anthracene panels into endoperoxides, whereas the iron(II) congeners underwent incomplete conversion. The reaction was found to be partially reversible in the case of the 1-Fe II cage. The dioxygen-cage cycloadducts were found to bind a set of guest molecules more weakly than the parent cages, with affinity dropping by more than two orders of magnitude in some cases. The light-driven cycloaddition reaction between cage and 1 O 2 thus served as a stimulus for guest release and reuptake.
(© 2023 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH.)
Databáze: MEDLINE
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