title: Blue and Green Phosphorescent Liquid-Crystalline Iridium Complexes with High Hole Mobility.
abstract: Blue- and green-emitting cyclometalated liquid-crystalline iridium complexes are realized by using a modular strategy based on strongly mesogenic groups attached to an acetylacetonate ancillary ligand. The cyclometalated ligand dictates the photophysical properties of the materials, which are identical to those of the parent complexes. High hole mobilities, up to 0.004 cm(2) V(-1) s(-1), were achieved after thermal annealing, while amorphous materials show hole mobilities of only approximately 10(-7) -10(-6) cm(2) V(-1) s(-1), similar to simple iridium complexes. The design strategy allows the facile preparation of phosphorescent liquid-crystalline complexes with fine-tuned photophysical properties.
authors.affiliation: School of Chemistry, University of Birmingham, Birmingham, B15 2TT (UK.|Department of Chemistry, Key Lab of Environment-Friendly Chemistry and Application in the Ministry of Education, Xiangtan University, Xiangtan, 411105 (P.R. China.
authors.forename: Yafei
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Department of Chemistry, University of York, Heslington, York, YO10 5DD (UK.
authors.forename: Christopher P
authors.initials: CP
authors.lastname: Cabry
authors.affiliation: Department of Chemistry, Key Lab of Environment-Friendly Chemistry and Application in the Ministry of Education, Xiangtan University, Xiangtan, 411105 (P.R. China.
authors.forename: ManJun
authors.initials: M
authors.lastname: Xiao
authors.affiliation: School of Chemistry, University of Birmingham, Birmingham, B15 2TT (UK.
authors.forename: Louise
authors.initials: L
authors.lastname: Male
authors.affiliation: Department of Chemistry, University of York, Heslington, York, YO10 5DD (UK.
authors.forename: Stephen J
authors.initials: SJ
authors.lastname: Cowling
authors.affiliation: Department of Chemistry, University of York, Heslington, York, YO10 5DD (UK. duncan.bruce@york.ac.uk.
authors.forename: Duncan W
authors.initials: DW
authors.lastname: Bruce
authors.affiliation: Department of Chemistry, Key Lab of Environment-Friendly Chemistry and Application in the Ministry of Education, Xiangtan University, Xiangtan, 411105 (P.R. China.
authors.forename: Junwei
authors.initials: J
authors.lastname: Shi
authors.affiliation: Department of Chemistry, Key Lab of Environment-Friendly Chemistry and Application in the Ministry of Education, Xiangtan University, Xiangtan, 411105 (P.R. China.
authors.forename: Weiguo
authors.initials: W
authors.lastname: Zhu
authors.affiliation: School of Chemistry, University of Birmingham, Birmingham, B15 2TT (UK. e.baranoff@bham.ac.uk.
authors.forename: Etienne
authors.identifier: http://orcid.org/0000-0003-3780-0733
authors.initials: E
authors.lastname: Baranoff
keywords: hole mobility; iridium; liquid crystals; phosphorescence; smectic phases