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Redox‐Switchable Complexes Based on Nanographene‐NHCs
Author(s) -
RuizZambrana César,
Dubey Rajeev K.,
Poyatos Macarena,
MateoAlonso Aurelio,
Peris Eduardo
Publication year - 2022
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.202201384
Subject(s) - moiety , perylene , ligand (biochemistry) , redox , carbene , rhodium , chemistry , iridium , photochemistry , cycloaddition , electrochemistry , pyrene , diimide , cyclic voltammetry , catalysis , polymer chemistry , combinatorial chemistry , stereochemistry , organic chemistry , molecule , electrode , biochemistry , receptor
Abstract A series of rhodium and iridium complexes with a N‐heterocyclic carbene (NHC) ligand decorated with a perylene‐diimide‐pyrene moiety are described. Electrochemical studies reveal that the complexes can undergo two successive one‐electron reduction events, associated to the reduction of the PDI moiety attached to the NHC ligand. The reduction of the ligand produces a significant increase on its electron‐donating character, as observed from the infrared spectroelectrochemical studies. The rhodium complex was tested in the [3+2] cycloaddition of diphenylcyclopropenone and methylphenylacetylene, where it displayed a redox‐switchable behavior. The neutral complex showed moderate activity, which was suppressed when the catalyst was reduced.