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Design and Synthesis of Blue‐Emitting Cyclometalated Iridium(III) Complexes Based on Regioselective Functionalization
Author(s) -
Hisamatsu Yosuke,
Aoki Shin
Publication year - 2011
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.201100755
Subject(s) - chemistry , regioselectivity , iridium , formylation , pyridine , halogenation , surface modification , ring (chemistry) , sulfonyl , photochemistry , ligand (biochemistry) , thiophene , medicinal chemistry , combinatorial chemistry , organic chemistry , catalysis , biochemistry , alkyl , receptor
A series of tris‐cyclometalated Ir III complexes were prepared by regioselective substitution reactions (formylation, thiocyanation, and iodination) and subsequent conversions (cyanation, cross‐coupling reaction, reduction, and oxidation) on a 2‐(4′‐methoxyphenyl)pyridine (mppy) ligand of fac ‐[Ir(mppy) 3 ]. The introduction of electron‐withdrawing groups such as CHO, CN, and sulfonyl groups (SO 2 Me, SO 2 Ar) at the 5′‐position of the phenyl ring of the mppy portion induces a considerable blueshift in luminescence emission (from 495 nm to approximately 465 nm) in degassed organic solvents.