Autoren:	Sittel, Steven Sell, Arne Christian Hofmann, Kamil Wiedemann, Christina Nau, Jan Philipp Kerzig, Christoph Manolikakes, Georg Heinze, Katja
Titel:	Visible-light induced fixation of SO2 into organic molecules with polypyridine chromium(III) complexes
Online-Publikationsdatum:	7-Jun-2023
Erscheinungsdatum:	2023
Sprache des Dokuments:	Englisch
Zusammenfassung/Abstract:	Incorporation of sulfur dioxide into organic compounds is achieved by a photocatalytic approach using sensitizers made from earth-abundant chromium(III) ions and visible light leading to sulfones and sulfonamides. We employed three different chromium(III) sensitizers [Cr(ddpd)2]3+, [Cr(bpmp)2]3+ and [Cr(tpe)2]3+ with long excited state lifetimes and different ground and excited state redox potentials as well as varying stability under the reaction conditions (ddpd=N,N’-dimethyl-N,N’-dipyridin-2-yl-pyridine-2,6-diamine; bpmp=2,6-bis(2-pyridylmethyl)pyridine; tpe=1,1,1-tris(pyrid-2-yl)ethane). Key reaction steps of the catalytic cycles are identified by electrochemical, luminescence quenching, photolysis, laser flash photolysis and catalytic experiments delivering a detailed picture of the challenges in these transformations. The reactivity of the reduced chromium complex was identified as a key property to explain the reaction outcomes. Initial cage escape yield determinations with [Cr(tpe)2]3+ revealed that desired photoreactions occur with unusually high quantum efficiencies, whereas side reactions are almost unproductive.
DDC-Sachgruppe:	540 Chemie 540 Chemistry and allied sciences
Veröffentlichende Institution:	Johannes Gutenberg-Universität Mainz
Organisationseinheit:	FB 09 Chemie, Pharmazie u. Geowissensch.
Veröffentlichungsort:	Mainz
ROR:	https://ror.org/023b0x485
DOI:	http://doi.org/10.25358/openscience-9153
Version:	Published version
Publikationstyp:	Zeitschriftenaufsatz
Nutzungsrechte:	CC BY-NC
Informationen zu den Nutzungsrechten:	https://creativecommons.org/licenses/by-nc/4.0/
Zeitschrift:	ChemCatChem 15 6
Seitenzahl oder Artikelnummer:	e202201562
Verlag:	Wiley-VCH
Verlagsort:	Weinheim
Erscheinungsdatum:	2023
ISSN:	1867-3899
DOI der Originalveröffentlichung:	10.1002/cctc.202201562
Enthalten in den Sammlungen:	DFG-491381577-H