Yu, Jen-Kan’s team published research in Chemistry – A European Journal in 10 | CAS: 219508-27-7

Chemistry – A European Journal 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 C18H28B2O4, Synthetic Route of 219508-27-7.

Yu, Jen-Kan published the artcileA remarkable ligand orientational effect in osmium-atom-induced blue phosphorescence, Synthetic Route of 219508-27-7, the publication is Chemistry – A European Journal (2004), 10(24), 6255-6264, database is CAplus and MEDLINE.

OsII-based carbonyl complexes cis(CO),trans(Npy,Npy),cis(Ntz,Ntz)-[Os(CO)2(bptz)2] (1), cis(CO),cis(Npy,Npy),trans(Ntz,Ntz)-[Os(bptz)2(CO)2] (2), and cis(CO),trans(Npy,Npy),cis(Ntz,Ntz)-[Os(CO)2(fptz)2] (3), where bptz and fptz denote 3-tert-butyl-5-(2-pyridyl)- and 3-trifluoromethyl-5-(2-pyridyl)-1,2,4-triazolate, resp., were designed and synthesized in an effort to achieve high efficiency, room-temperature blue phosphorescence. Although 1 and 2 are geometric isomers, remarkably different excited-state relaxation pathways were observed Complex 1 exhibits strong phosphorescence in MeCN (Φp ∼ 0.47) and as a single crystal at room temperature, whereas complex 2 is nearly nonemissive under similar conditions. The associated relaxation dynamics were comprehensively studied by spectroscopic and relaxation dynamics as well as by theor. approaches. The authors’ results lead the authors to the conclusion that for complex 2, the loose bolt effect of metal-ligand bonding interactions plays a crucial role in the fast radiationless deactivation of this type of geometrical isomer. Fine adjustment can also be achieved by functionalizing the ligands so that the electron-withdrawing nature of the CF3 group in 3 stabilizes the HOMO of the triazolate moiety, thus moving the emission further into the pure blue region; this results in highly efficient phosphorescence and renders 3 particularly attractive for application in blue OLED devices.

Chemistry – A European Journal 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 C18H28B2O4, Synthetic Route of 219508-27-7.

Referemce:
https://en.wikipedia.org/wiki/1,2,3-Triazole,
Triazoles – an overview | ScienceDirect Topics