Shahroosvand Hashem, Abaspour Saeid, Pashaei Babak, Radicchi Eros, De Angelis Filippo, Bonaccorso Francesco
Chemistry Department, University of Zanjan, Zanjan, Iran.
Chem Commun (Camb). 2017 Jun 6;53(46):6211-6214. doi: 10.1039/c7cc02878d.
We report on the exploitation of a new tetrazole-substituted 1,10-phenanthroline and a 2,2'-bipyridine (bpy) ancillary ligand modified with an electron-donating group in cationic ruthenium complexes. This complex, placed in between two electrodes without any polymer, demonstrates high efficiency near-infrared (NIR) electroluminescence (EL). The comparison between bpy and its methyl-substituted ancillary ligand shows that the cationic Ru tetrazolate complex containing methyl groups exhibits a red shift in the EL wavelength from 620 to 800 nm compared to [Ru(bpy)] and an almost twofold reduction in the turn-on voltage, i.e., from 5 to 3 V, with respect to 5-tetrazole-1,10-phenanthroline. An external quantum efficiency of 0.95% for the dimethyl derivative is demonstrated, which is a remarkable result for non-doped NIR light electrochemical cells based on ruthenium polypyridyl.
我们报道了一种新型四唑取代的1,10 - 菲咯啉以及一种在阳离子钌配合物中用供电子基团修饰的2,2'-联吡啶（bpy）辅助配体的应用。这种配合物置于两个电极之间，没有任何聚合物，展现出高效的近红外（NIR）电致发光（EL）。bpy及其甲基取代的辅助配体之间的比较表明，与[Ru(bpy)]相比，含甲基的阳离子钌四唑配合物的EL波长出现红移，从620 nm移至800 nm，且开启电压几乎降低了两倍，即相对于5 - 四唑 - 1,10 - 菲咯啉从5 V降至3 V。二甲基衍生物的外量子效率为0.95%，这对于基于钌多吡啶的非掺杂近红外光电化学电池来说是一个显著的结果。
