Long-Lived Charge-Transfer States of Nickel(II) Aryl Halide Complexes Facilitate Bimolecular Photoinduced Electron Transfer.
J Am Chem Soc
; 140(8): 3035-3039, 2018 02 28.
Article
em En
| MEDLINE
| ID: mdl-29400956
ABSTRACT
Here we investigate the photophysics and photochemistry of Ni(II) aryl halide complexes common to cross-coupling and Ni/photoredox reactions. Computational and ultrafast spectroscopic studies reveal that these complexes feature long-lived 3MLCT excited states, implicating Ni as an underexplored alternative to precious metal photocatalysts. Moreover, we show that 3MLCT Ni(II) engages in bimolecular electron transfer with ground-state Ni(II), which enables access to Ni(III) in the absence of external oxidants or photoredox catalysts. As such, it is possible to facilitate Ni-catalyzed C-O bond formation solely by visible light irradiation, thus representing an alternative strategy for catalyst activation in Ni cross-coupling reactions.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Complexos de Coordenação
/
Hidrocarbonetos Halogenados
/
Níquel
Idioma:
En
Revista:
J Am Chem Soc
Ano de publicação:
2018
Tipo de documento:
Article
País de afiliação:
Estados Unidos