10.1021/acs.inorgchem.8b02984.s001
Guo Zou
Guo
Zou
Li Zhao
Li
Zhao
Longwei Zeng
Longwei
Zeng
Kaijun Luo
Kaijun
Luo
Hailiang Ni
Hailiang
Ni
Haifeng Wang
Haifeng
Wang
Quan Li
Quan
Li
Wenhao Yu
Wenhao
Yu
Xuelian Li
Xuelian
Li
Columnar Iridium(III) Metallomesogens Based on Polycatenar
Pyridyltetrazolate with Ambipolar Carrier Mobility Behavior
American Chemical Society
2018
pyridyltetrazolate ligand
charge carrier injection
charge transport properties
Polycatenar Pyridyltetrazolate
1 D nanostructure
Hexagonal columnar mesophases
exhibit ambipolar carrier mobility behavior
photoluminescence quantum yields
crystal film display
pyridyltetrazolate derivatives
Ambipolar Carrier Mobility Behavior
liquid-crystalline phase
diphenylpyridine
space charge limited-current method
emissive behavior
emission wavelength
Iridium
iridium
charge transport behavior
complex
device
alkoxyl chains
annealing treatment
2018-12-13 22:44:40
Journal contribution
https://acs.figshare.com/articles/journal_contribution/Columnar_Iridium_III_Metallomesogens_Based_on_Polycatenar_Pyridyltetrazolate_with_Ambipolar_Carrier_Mobility_Behavior/7464794
In
this paper, we have designed and synthesized a series of neutral
liquid-crystalline iridium(III) complexes based on polycatenar 2,5-diphenylpyridine
and pyridyltetrazolate derivatives. Iridium(III) complexes all display
highly emissive behavior with photoluminescence quantum yields in
the range of 0.45–0.66 and a maximum emission wavelength at
∼563 nm. Hexagonal columnar mesophases of iridium(III) complexes
can be obtained by changing the number and length of peripheral alkoxyl
chains attached to a 2,5-diphenylpyridine ligand (main ligand) and
a pyridyltetrazolate ligand (auxiliary ligand). Moreover, experimental
results of the charge transport properties for these iridium(III)
complexes, which were measured by the space charge limited-current
method, exhibit ambipolar carrier mobility behavior. In particular,
the liquid-crystalline iridium(III) complexes can self-organize into
one-dimensional (1D) nanostructure after thermal annealing treatment
in their liquid-crystalline phase. The devices based on liquid crystal
film display improved charge transport behavior compared with that
of the devices based on polycrystalline film, indicating 1D nanostructure
is beneficial to charge carrier injection and transportation.