Artículo
Accessing Photoredox Transformations with an Iron(III) Photosensitizer and Green Light
Aydogan, Akin; Bangle, Rachel E.; Cadranel, Alejandro
; Turlington, Michael D.; Conroy, Daniel T.; Cauët, Emilie; Singleton, Michael L.; Meyer, Gerald J.; Sampaio, Renato N.; Elias, Benjamin; Troian Gautier, Ludovic

Fecha de publicación:
09/2021
Editorial:
American Chemical Society
Revista:
Journal of the American Chemical Society
ISSN:
0002-7863
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Efficient excited-state electron transfer between an iron(III) photosensitizer and organic electron donors was realized with green light irradiation. This advance was enabled by the use of the previously reported iron photosensitizer, [Fe(phtmeimb)2]+ (phtmeimb = {phenyl[tris(3-methyl-imidazolin-2-ylidene)]borate}, that exhibited long-lived and luminescent ligand-to-metal charge-transfer (LMCT) excited states. A benchmark dehalogenation reaction was investigated with yields that exceed 90% and an enhanced stability relative to the prototypical photosensitizer [Ru(bpy)3]2+. The initial catalytic step is electron transfer from an amine to the photoexcited iron sensitizer, which is shown to occur with a large cage-escape yield. For LMCT excited states, this reductive electron transfer is vectorial and may be a general advantage of Fe(III) photosensitizers. In-depth time-resolved spectroscopic methods, including transient absorption characterization from the ultraviolet to the infrared regions, provided a quantitative description of the catalytic mechanism with associated rate constants and yields.
Palabras clave:
photoredox catalysis
,
electron transfer
,
iron
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Articulos(INQUIMAE)
Articulos de INST.D/QUIM FIS D/L MATERIALES MEDIOAMB Y ENERGIA
Articulos de INST.D/QUIM FIS D/L MATERIALES MEDIOAMB Y ENERGIA
Citación
Aydogan, Akin; Bangle, Rachel E.; Cadranel, Alejandro; Turlington, Michael D.; Conroy, Daniel T.; et al.; Accessing Photoredox Transformations with an Iron(III) Photosensitizer and Green Light; American Chemical Society; Journal of the American Chemical Society; 143; 38; 9-2021; 15661-15673
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