Guo, Xiao-xia published the artcileNew highly phosphorescent heteroleptic tris-cyclometalated iridium(III) complexes: Synthesis and photophysical characterization, Product Details of C8H5F3O3, the publication is Guangpuxue Yu Guangpu Fenxi (2010), 30(1), 170-173, database is CAplus and MEDLINE.
New heteroleptic tris-cyclometalated iridium(III) complexes (ppy)2Ir(LX) [ppy = 2-phenylpyridine, LX = Sal (salicylic acid), MSal (4-methylsalicylic acid), FSal (4-trifluoromethylsalicylic acid)] was synthesized and characterized. The mol. structure, photophys. properties and thermal stability were tested and analyzed. The results show that the absorption peaks were located around 270, 370, 450 and 484 nm resp. at room temperature The two former peaks at 270 and 370 nm should belong to 1π–π* transition at ppy and transition from salicylic acid ligands to 2-phenylpyridine. The peaks around 450 and 484 nm can be assigned to the charge transfer transition from Ir to ligand (1MLCT and 3MLCT) and 3π–π* transition resp. The PL emission peaks were located at 520, 522, and 510 nm, resp. The emission of (ppy)2Ir(Sal) and (ppy)2Ir(MSal) was mainly ascribed to the radiation transition of triple state 3MLCT, while the emission of (ppy)2 Ir(FSal) was mainly from the radiation transition between Sal and ppy, partly from the radiation transition of single state 1MLCT and triple state 3MLCT. The quantum efficiencies of these complexes were 0.37, 0.33 and 0.29 resp. The thermal decomposition temperature was from 306 to 328°C. (ppy)2Ir(LX), being efficient phosphorescent materials with good thermal stability, can be used in organic electroluminescent devices.
Guangpuxue Yu Guangpu Fenxi published new progress about 328-90-5. 328-90-5 belongs to alcohols-buliding-blocks, auxiliary class Trifluoromethyl,Fluoride,Carboxylic acid,Benzene,Phenol, name is 2-Hydroxy-4-(trifluoromethyl)benzoic acid, and the molecular formula is C8H5F3O3, Product Details of C8H5F3O3.
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