Photophysical and electrochemical properties of heteroleptic tris-cyclometalated iridium(III) complexes.
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.
Dedeian
Kenneth
K
Army Research Laboratory, 2800 Powder Mill Road, Adelphi, Maryland 20783, USA. kdedeian@art.army.mil
Shi
Jianmin
J
Shepherd
Nigel
N
Forsythe
Eric
E
Morton
David C
DC