Hung, Jui-Yi published the artcilePhosphorescent Ir(III) Complexes Bearing Double Benzyldiphenylphosphine Cyclometalates; Strategic Synthesis, Fundamental and Integration for White OLED Fabrication, Recommanded Product: 2-[5-(Trifluoromethyl)-1H-1,2,4-triazol-3-yl]pyridine, the publication is Journal of Materials Chemistry (2010), 20(36), 7682-7693, database is CAplus.
A new Ir(III) complex [Ir(bdp)2(OAc)] (1) was prepared by the treatment of IrCl3(tht)3 with approx. two equiv of benzyldiphenylphosphine in refluxing decalin solution(bdpH = benzyldiphenylphosphine and tht = tetrahydrothiophene). Complex 1 proves to be a versatile precursor, which could further react with various triazolate chelates such as 5-pyridyl-3-trifluoromethyl-1,2,4-triazole (fptzH), 3-tert-butyl-5-(2-pyridyl)-1,2,4-triazole (bptzH), 5-(1-isoquinolyl)-3-tert-butyl-1,2,4-triazole (iqbtzH) and 5-(1-phenanthridinyl)-3-tert-butyl-1,2,4-triazole (pbtzH) to afford the emissive complexes [Ir(bdp)2(fptz)] (2), [Ir(bdp)2(bptz)] (3), [Ir(bdp)2(iqbtz)] (4), and [Ir(bdp)2(phbtz)] (5), resp. Single crystal x-ray diffraction studies of 1 and 5 revealed a distorted octahedral Ir(III) metal core; both possess two mutually orthogonal bdp cyclometalates, and the resp. PPh2 donors reside at the cis-orientation. Formation of complexes 2–5 can be envisioned as simple replacement of acetate with the incoming N-heterocyclic triazolate chelates. As for photophys. properties, the structural variation leads to salient differences in emission features among complexes 2–5. Combining theor. approaches, the results are rationalized by the contribution from the degree of ligand π-conjugation, together with the occurrence of ligand-to-ligand charge transfer (LLCT) and intra-ligand ππ* transition in the lowest lying excited state. The orange-red and white light-emitting OLEDs were then fabricated using 5 as dopant, for which the resp. devices gave peak efficiencies of 13.6% photons/electron, 33.3 cd A-1, 29.8 lm/W and with CIEx,y = 0.530, 0.467 at 100 cd m-2, and peak efficiencies of 13.0% photons/electron, 28.0 cd A-1, 22.8 lm/W, and with CIEx,y = 0.356, 0.348 at 1000 cd m-2.
Journal of Materials 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, Recommanded Product: 2-[5-(Trifluoromethyl)-1H-1,2,4-triazol-3-yl]pyridine.
Referemce:
https://en.wikipedia.org/wiki/1,2,3-Triazole,
Triazoles – an overview | ScienceDirect Topics