卤化物
磷光
荧光
光致发光
配体(生物化学)
单重态
磷化氢
化学
光化学
三元运算
发光
三重态
材料科学
激发态
分子
无机化学
光电子学
原子物理学
物理
光学
有机化学
受体
催化作用
计算机科学
程序设计语言
生物化学
作者
Hiroki Ohara,Atsushi Kobayashi,Masako Kato
出处
期刊:Dalton Transactions
[The Royal Society of Chemistry]
日期:2014-01-01
卷期号:43 (46): 17317-17323
被引量:107
摘要
Simple mononuclear Cu(I)-halide complexes, [CuX(PPh3)2(4-Mepy)] (X = Cl(-), Br(-), I(-); PPh3 = triphenylphosphine; 4-Mepy = 4-methylpyridine), were prepared. They exhibit blue light emission, with extremely high photoluminescence quantum yields approaching 100% in the crystals. Emission lifetime analyses and density functional theory calculations revealed that the bright blue light emission at room temperature is mainly delayed fluorescence originating from the singlet metal-to-ligand charge transfer (MLCT) state combined with the halide-to-ligand charge transfer (XLCT) state, ((1)(M + X)LCT), while that at 77 K is phosphorescence from the (3)(M + X)LCT transition state, due to the small singlet-triplet energy differences (ΔE = 940-1170 cm(-1)). The ternary ligand systems consisting of halide, bulky phosphine, and N-heteroaromatic ligands constitute inexpensive pure-blue-light-emitting materials, which can be fabricated by facile procedures such as simple manual grinding.
科研通智能强力驱动
Strongly Powered by AbleSci AI