Hsu, Fang-Chi published the artcileEn Route to the Formation of High-Efficiency, Osmium(II)-Based Phosphorescent Materials, HPLC of Formula: 219508-27-7, the publication is Inorganic Chemistry (2006), 45(25), 10188-10196, database is CAplus and MEDLINE.
Triosmium cluster complexes [Os3(CO)8(fppz)2] (2a) and [Os3(CO)8(fptz)2] (2b) bearing two 2-pyridyl azolate ligands were synthesized in an attempt to establish the reaction mechanism that gives rise to the blue-emitting phosphorescent complexes [Os(CO)2(fppz)2] (1a) and [Os(CO)2(fptz)2] (1b) [(fppz)H = 3-(trifluoromethyl)-5-(2-pyridyl)pyrazole; (fptz)H = 3-(trifluoromethyl)-5-(2-pyridyl)triazole]. X-ray structural anal. of 2b showed an open triangular metal framework incorporating multisite-coordinated 2-pyridyltriazolate ligands. Treatment of 2 with the resp. 2-pyridylazolate ligand gave blue-emitting complex 1b, confirming their intermediacy, while the reaction of 2b with phosphine ligand PPh2Me afforded two hitherto novel isomeric hydride complexes 3 and 4 [Os(CO)(fptz)(PPh2Me)2(H)], for which the reversible interconversion was clearly established at higher temperatures (>180°). The single-crystal x-ray diffraction analyses of 3 and 4 confirmed their monometallic and isomeric nature, together with the coordination of two phosphine ligands located in the trans-disposition and one CO and one hydride located opposite to the pyridyl triazolate chelate. Subtle differences in photophys. properties were examined for isomers 3 and 4 from steady state absorption and emission, the relaxation dynamics, and temperature-dependent luminescent studies. The results, in combination with time-dependent d. function theory (TDDFT) calculations, provide fundamental insights into the future design and preparation of highly efficient phosphorescent emitters.
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, HPLC of Formula: 219508-27-7.
Referemce:
https://en.wikipedia.org/wiki/1,2,3-Triazole,
Triazoles – an overview | ScienceDirect Topics