HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.
A new family consisting
of three luminescent neutral Ir(III) complexes
with the unprecedented [Ir(C^N^C)(N^N)Cl] architecture, where C^N^C
is a bis(six-membered) chelating tridentate tripod ligand derived
from 2-benzhydrylpyridine (bnpy) and N^N is 4,4′-di-tert-butyl-2,2′-bipyridine (dtBubpy),
is reported. X-ray crystallography reveals an unexpected and unusual
double C–H bond activation of the two distal nonconjugated
phenyl rings of the bnpy coupled with a very short Ir–Cl bond trans to the pyridine of the bnpy ligand. Depending on the
substitution on the bnpy ligand, phosphorescence, ranging from yellow
to red, is observed in dichloromethane solution. A combined study
using density functional theory (DFT) and time-dependent DFT (TD-DFT)
corroborates the mixed charge-transfer nature of the related excited
states.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.