Lin, Cheng-Huei published the artcileIridium(III) Complexes of a Dicyclometalated Phosphite Tripod Ligand: Strategy to Achieve Blue Phosphorescence Without Fluorine Substituents and Fabrication of OLEDs, SDS of cas: 219508-27-7, the publication is Angewandte Chemie, International Edition (2011), 50(14), 3182-3186, S3182/1-S3182/20, database is CAplus and MEDLINE.
The authors report a 1-pot synthetic route to obtain new blue phosphors without F substituents. The mols. were assembled using dicyclometalated phosphite (or phosphonite) tripod, coupled with 2-pyridyl triazolate chromophore and a monodentate phosphorous donor. Exploiting one of the products as a paradigm, the outstanding performance includes: peak efficiencies of 11.0% , 22.3 cd A-1, and 16.7 lm W-1, together with a turn-on voltage of 4.1 V and blue chromaticity CIEx,y = 0.179, 0.286 recorded at 100 cd m-2. The terdentate PC̅2 not only stabilizes the phosphors, its saturated nature also simplifies the color tuning strategy, as evidence by the outstanding performance of another product toward better maximum luminescence and blue chromaticity with slight sacrifice on the peak efficiency. The results thus reveal a great potential of both PC̅2 and pyridyl azolate chelates in the preparation of blue-emitting phosphors.
Angewandte Chemie, International Edition 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, SDS of cas: 219508-27-7.
Referemce:
https://en.wikipedia.org/wiki/1,2,3-Triazole,
Triazoles – an overview | ScienceDirect Topics