Please use this identifier to cite or link to this item:
http://doi.org/10.25358/openscience-8198
Authors: | Sittel, Steven Naumann, Robert Heinze, Katja |
Title: | Molecular rubies in photoredox catalysis |
Online publication date: | 14-Nov-2022 |
Year of first publication: | 2022 |
Language: | english |
Abstract: | The molecular ruby [Cr(tpe)2]3+ and the tris(bipyridine) chromium(III) complex [Cr(dmcbpy)3]3+ as well as the tris(bipyrazine)ruthenium(II) complex [Ru(bpz)3]2+ wereemployed in the visible light-induced radical cation [4+2] cycloaddition (tpe = 1,1,1-tris(pyrid-2-yl)ethane, dmcbpy = 4,4′-dimethoxycarbonyl-2,2′-bipyridine, bpz = 2,2′-bipyrazine), while [Cr(ddpd)2]3+ serves as a control system (ddpd = N,N′-dimethyl N,N′-dipyridin-2-ylpyridine-2,6-diamine). Along with an updated mechanistic proposal for the CrIII driven catalytic cycle based on redox chemistry, Stern-Volmer analyses, UV/Vis/NIR spectroscopic and nanosecond laser flash photolysis studies, we demonstrate that the very weakly absorbing photocatalyst [Cr(tpe)2]3+ outcompetes [Cr(dmcbpy)3]3+ and even [Ru(bpz)3]2+ in particular at low catalyst loadings, which appears contradictory at first sight. The high photostability, the reversible redoxchemistry and the very long excited state lifetime account for the exceptional performance and even reusability of [Cr(tpe)2]3+ in this photoredox catalytic system. |
DDC: | 540 Chemie 540 Chemistry and allied sciences |
Institution: | Johannes Gutenberg-Universität Mainz |
Department: | FB 09 Chemie, Pharmazie u. Geowissensch. |
Place: | Mainz |
ROR: | https://ror.org/023b0x485 |
DOI: | http://doi.org/10.25358/openscience-8198 |
Version: | Published version |
Publication type: | Zeitschriftenaufsatz |
Document type specification: | Scientific article |
License: | CC BY |
Information on rights of use: | https://creativecommons.org/licenses/by/4.0/ |
Journal: | Frontiers in chemistry 10 |
Pages or article number: | 887439 |
Publisher: | Frontiers Media |
Publisher place: | Lausanne |
Issue date: | 2022 |
ISSN: | 2296-2646 |
Publisher DOI: | 10.3389/fchem.2022.887439 |
Appears in collections: | DFG-491381577-G |
Files in This Item:
File | Description | Size | Format | ||
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molecular_rubies_in_photoredo-20221028152436261.pdf | Article | 1.93 MB | Adobe PDF | View/Open | |
molecular_rubies_in_photoredo-20221102113317036.PDF | Supplementary material | 3.72 MB | Adobe PDF | View/Open |