Hwang, Fu-Ming published the artcileIridium(III) Complexes with Orthometalated Quinoxaline Ligands: Subtle Tuning of Emission to the Saturated Red Color, Category: triazoles, the publication is Inorganic Chemistry (2005), 44(5), 1344-1353, database is CAplus and MEDLINE.
Rational design and syntheses of four Ir complexes bearing two substituted quinoxalines and an addnl. 5-(2-pyridyl)pyrazolate or -triazolate as the 3rd coordinating ligand are reported. Single-crystal x-ray diffraction studies of [(dpqx)2Ir(fppz)] [1; dpqxH = 2,3-diphenylquinoxaline; fppzH = 3-(trifluoromethyl)-5-(2-pyridyl)pyrazole] reveal a distorted octahedral geometry, in which two dpqx ligands adopt an eclipsed configuration, for which the quinoxaline N atoms and the C atoms of orthometalated Ph groups are located at the mutual trans- and cis-positions, resp. The lowest absorption band for all complexes consists of a mixture of heavy-atom Ir(III)-enhanced 3MLCT and 3ππ* transitions, and the phosphorescent peak wavelength can be fine-tuned to cover the spectral range of 622-649 nm with high quantum efficiencies. The cyclic voltammetry was measured, showing a reversible, metal-centered oxidation with potentials at 0.76-1.03 V, as well as two reversible reduction waves with potentials ranging from -1.61 to -2.06 V, attributed to the sequential addition of two electrons to the more electron-accepting heterocyclic portion of two distinctive cyclometalated CN̂ ligands. Complex 1 was used as a representative example to fabricate red-emitting PLEDs by blending it into a PVK-PBD polymer mixture The devices exhibited the characteristic emission profile of 1 with peak maxima located at 640 nm. The maximum external quantum efficiency was 3.15% ph/el with a brightness of 1751 cd/m2 at a c.d. of 67.4 mA/cm2, and the maximum brightness of 7750 cd/m2 was achieved at the applied voltage of 21 V and with CIE coordinates of (0.64, 0.31).
Inorganic Chemistry published new progress about 219508-27-7. 219508-27-7 belongs to triazoles, auxiliary class Trifluoromethylated Building Blocks, name is 2-[5-(Trifluoromethyl)-1H-1,2,4-triazol-3-yl]pyridine, and the molecular formula is C8H5F3N4, Category: triazoles.
Referemce:
https://en.wikipedia.org/wiki/1,2,3-Triazole,
Triazoles – an overview | ScienceDirect Topics