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Cyclometalated Ruthenium, Osmium, and Iridium Complexes Bridged by an NCN–Pyrene–NCN Derivative – Synthesis and Comparison of Optical, Thermal, and Electrochemical Properties
Author(s) -
Zych Dawid,
Slodek Aneta,
Golba Sylwia,
Krompiec Stanisław
Publication year - 2018
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201800011
Subject(s) - chemistry , osmium , ruthenium , iridium , density functional theory , pyrene , terpyridine , electrochemistry , ligand (biochemistry) , metal , photochemistry , derivative (finance) , computational chemistry , organic chemistry , catalysis , electrode , financial economics , economics , biochemistry , receptor
New ruthenium ( Ru ), osmium ( Os ), and iridium ( Ir ) complexes bridged by the cyclometalating ligand 1,3,6,8‐tetra[4‐(2,2‐dimethylpropyloxy)‐2‐pyridyl]pyrene and containing terminal 4′‐(4‐metoxynaphthalene‐1‐yl)‐2,2′:6′,2′′‐terpyridine ligands were synthesized, and the effects of the metal center on their diverse properties were evaluated. Thermal measurements showed that the obtained complexes retain high thermal stabilities. The structural properties were evaluated through density functional theory (DFT) calculations. Furthermore, spectroscopic and theoretical studies through time‐dependent DFT (TD‐DFT) calculations revealed the characters of the transitions; metal‐to‐ligand charge‐transfer (MLCT) excitations are predominant for Ru and Os and weakly observed for Ir . Electrochemical studies revealed considerable differences between the complexes.