INVESTIGADORES
CADRANEL Alejandro
artículos
Título:
EMI Series Mechanistic Investigation of a Visible Light Mediated Dehalogenation/Cyclisation Reaction using Iron(III), Iridium(III) and Ruthenium(II) Photosensitizers
Autor/es:
AYDOGAN, AKIN; BANGLE, RACHEL; DE KREIJGER, SIMON; DICKENSON, JOHN; SINGLETON, MICHAEL L; CAUËT, EMILIE; CADRANEL, ALEJANDRO; MEYER, GERALD JOHN; ELIAS, BENJAMIN; NEIVA SAMPAIO, RENATO; TROIAN-GAUTIER, LUDOVIC
Revista:
Catalysis Science & Technology
Editorial:
Royal Society of Chemistry
Referencias:
Año: 2021
ISSN:
2044-4753
Resumen:
The mechanism of a visible light-driven dehalogenation/cyclization reaction was investigated using ruthenium(II), iridium(III)and iron(III) photosensitizers by means of steady-state photoluminescence, time-resolved infrared spectroscopy, andnanosecond/femtosecond transient absorption spectroscopy. The nature of the photosensitizer was found to influence theproducts distribution such that the dehalogenated, non-cyclized products were only detected for the iron photosensitizer.Strikingly, with the iron photosensitizer, large catalytic yields required a low dielectric solvent such as dichloromethane,consistent with a previous publication. This low dielectric solvent allowed ultrafast charge-separation to outcompetegeminate charge recombination and improved cage escape efficiency. Further, the identification of reaction mechanismsunique to the iron, ruthenium, and iridium photosensitizer represents progress towards the long-sought goal of utilizingearth-abundant, first-row transition metals for emerging energy and environmental applications.
