合成和表征了具有功能性C连接的吡唑基吡啶二亚胺配体的四种单核阳离子Cu(I)配合物。在室温下,在365 nm的紫外线下,这些络合物在溶液中发出类似的橙色光,而在薄膜中发出绿色的光,这可能是由于这些甲基或三氟甲基取代的苯基在吡唑环上的电荷和空间影响有限。而且,基于这些Cu(I)配合物的多层有机发光二极管(OLED)具有不同的性能效率。具有复合物1作为发光材料的器件具有17.8 cd A -1的最高电流效率和6.4%的外部量子效率(EQE),而具有复合物1的器件具有最大的电流效率。2,其示出了最高的光致发光量子产率与CD 13的电流效率,得到最贫穷器件效率-1和4.7%的EQE。
Enhancing the phosphorescence decay pathway of Cu(<scp>i</scp>) emitters – the role of copper–iodide moiety
作者:Giliandro Farias、Cristian A. M. Salla、Jéssica Toigo、Luís Gustavo Teixeira Alves Duarte、Adailton J. Bortoluzzi、Edivandro Girotto、Hugo Gallardo、Teresa Dib Zambon Atvars、Bernardo de Souza、Ivan H. Bechtold
DOI:10.1039/d1dt03912a
日期:——
compared to heavier metals such as iridium. Here, we report the synthesis and characterization of three mononuclear copper(I) complexes with diimines, triphenylphosphine, and iodide ligands to evaluate the effect of the copper–iodide (Cu–I) moiety into the phosphorescence decay pathway. Temperature-dependent photophysical studies revealed combined thermally activated delayed fluorescence and phosphorescence
由于与较重的金属(如铱)相比,铜原子的自旋轨道耦合常数相对较低,因此加速发光铜 ( I ) 配合物中的磷光通道一直极具挑战性。在这里,我们报告了三种单核铜 ( I ) 配合物与二亚胺、三苯膦和碘化物配体的合成和表征,以评估碘化铜 (Cu-I) 部分对磷光衰减途径的影响。与温度相关的光物理研究表明,热激活延迟荧光和磷光发射相结合,磷光衰减率约为 10 4 s -1. 密度泛函理论计算表明这些配合物的低位状态之间的自旋轨道耦合矩阵元素非常高。与经典的 [Cu(phen)(POP)] +相比,我们的结果表明,Cu-I 是一种通用部分,可将磷光衰减途径加速约一个数量级,并且可以通过简化的合成路线制备用很少的合成步骤。此外,这些配合物的 SOC 基质元素和磷光衰减率与广泛应用的基于较重金属的配位配合物相当,使其成为有机发光二极管活性层的有希望的替代品。
Cationic iridium complexes with an alkyl-linked bulky group at the cyclometalating ligand: synthesis, characterization, and suppression of phosphorescence concentration-quenching
作者:Yongjun Song、Hao Ren、Xianwen Meng、Lei He
DOI:10.1039/d1nj02375f
日期:——
(dpeppy) as the cyclometalating (C^N) ligand, and 2,2′-bipyridine (bpy) and 2-(1-phenyl-1H-pyrazol-3-yl)pyridine (phpzpy) as the ancillary ligands. The bulky 2,2-diphenylethyl group in dpeppy is linked to the cyclometalated 2-phenylpyridine moiety through a short alkyl chain, which provides large steric hindrance to the complexes without largely disturbing the emission properties of the emissive iridium-complex
Enhanced stability of blue-green light-emitting electrochemical cells based on a cationic iridium complex with 2-(1-phenyl-1H-pyrazol-3-yl)pyridine as the ancillary ligand
A new cationic iridium complex has been developed with 2-(1-phenyl-1H-pyrazol-3-yl)pyridine as the ancillary ligand, which bears a pendant protective phenyl ring within the molecule; blue-green light-emitting electrochemical cells (LECs) based on the complex show dramatically enhanced stability compared to the LEC based on a similar complex without pendant phenyl rings.
Heteroaryl substituted pyrazole modulators of metabotropic glutamate receptor-5
申请人:Cosford D.P. Nicholas
公开号:US20050026963A1
公开(公告)日:2005-02-03
Pyrazole compounds substituted directly, or by a bridge, with a heteroaryl moiety containing N adjacent to the point of connection of the heteroaryl, are mGluR5 modulators useful in the treatment of psychiatric and mood disorders such as, for example, schizophrenia, anxiety, depression, bipolar disorder and panic, as well as in the treatment of pain, circadian rhythm disorders, and other diseases.
The present invention includes novel phosphorescent metal complexes comprising fused imidazole-imidazole moieties. The invented compounds may be useful for application in organic electroluminescence devices.