title: Photophysical and electrochemical properties of heteroleptic tris-cyclometalated iridium(III) complexes.
abstract: Mixed (difluoro)phenylpyridine/(difluoro)phenylpyrazole tris-cyclometalated iridium complexes were prepared in order to study the effect of fluorination and the pyridine/pyrazole ratio on the emission and electrochemical properties. Increasing fluorination and replacement of pyridine by pyrazole both leads to a widening of the HOMO-LUMO gap and generally leads to a blue shift in emission.
authors.affiliation: Army Research Laboratory, 2800 Powder Mill Road, Adelphi, Maryland 20783, USA. kdedeian@art.army.mil
authors.forename: Kenneth
authors.initials: K
authors.lastname: Dedeian
authors.forename: Jianmin
authors.initials: J
authors.lastname: Shi
authors.forename: Nigel
authors.initials: N
authors.lastname: Shepherd
authors.forename: Eric
authors.initials: E
authors.lastname: Forsythe
authors.forename: David C
authors.initials: DC
authors.lastname: Morton