By adjusting the conjugation degrees of the phenylquinoline-based cyclometalated ligands, yellow, orange to red phosphorescent iridium(III) complexes [Ir(bzq)₂(POXD)] (1, bzq = 7,8-benzoquinoline, POXD = N-(5-phenyl-1,3,4-oxadiazol-2-yl)-diphenylphosphinic amide), [Ir(pq)₂(POXD)] (2, pq = 2-phenylquinoline) and [Ir(piq)₂(POXD)] (3, piq = 1-phenylisoquinoline) have been designed and prepared. Their photophysical and electrochemical studies and theoretical calculations were performed, and [Ir(bzq)₂(POXD)] was also determined by X-ray crystallography. At room temperature, complexes 1–3 exhibit efficient phosphorescence emissions at about 539, 592 and 614 nm with photoluminescence quantum yields (PLQYs) of 0.21, 0.06 and 0.06 in CH₃CN solutions, respectively. In the 5 wt% doped poly(methyl methacrylate) (PMMA) film, the PLQYs (0.35 for complex 1, 0.37 for complex 2 and 0.18 for complex 3, respectively) increase significantly. Organic light emitting diodes (OLEDs) based on these complexes were fabricated to evaluate their potential application. The yellow device in the configuration ITO/2-TNATA (25 nm)/NPB (5 nm)/TCTA (10 nm)/complex 1 (10 wt%):mCP (10 nm)/complex 1 (10 wt%):TPBi (10 nm)/TPBi (40 nm)/Liq (1 nm)/Al (100 nm) shows excellent performance with a maximum luminance of 24080 cd m⁻², maximum current efficiencies of 70.1 cd A⁻¹ and maximum external quantum efficiencies of 21.3% along with low efficiency roll-off.

中文翻译：

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含恶二唑取代的酰胺配体的铱（III）配合物：颜色调节和在高效磷光有机发光二极管中的应用

通过调节苯基喹啉基环金属化配体的缀合度，可以使黄色，橙色到红色磷光铱（III）络合物[Ir（bzq）₂（POXD）]（1，bzq = 7,8-苯并喹啉，POXD = N-（ 5-苯基-1,3,4-恶二唑-2-基）-二苯基次膦酰胺），[Ir（pq）₂（POXD）]（2，pq = 2-苯基喹啉）和[Ir（piq）₂（POXD） ]（3，piq ＝ 1-苯基异喹啉）已经被设计和制备。他们进行了光物理和电化学研究，并进行了理论计算，并且还通过X射线晶体学测定了[Ir（bzq）₂（POXD）]。在室温下，配合物1-3在CH ₃ CN溶液中显示出约539、592和614 nm的有效磷光发射，光致发光量子产率（PLQYs）分别为0.21、0.06和0.06 。在5％（重量）掺杂的聚（甲基丙烯酸甲酯）（PMMA）膜，所述PLQYs（0.35复杂1，0.37复杂2和0.18复杂3分别）显著增加。制造了基于这些配合物的有机发光二极管（OLED）来评估其潜在应用。配置为ITO / 2-TNATA（25 nm）/ NPB（5 nm）/ TCTA（10 nm）/复合物1（10 wt％）：mCP（10 nm）/复合物1的黄色设备（10 wt％）：TPBi（10 nm）/ TPBi（40 nm）/ Liq（1 nm）/ Al（100 nm）表现出卓越的性能，最大亮度为24080 cd m ^-2，最大电流效率为70.1 cd甲^-1和低效率滚降沿的21.3％的最大外量子效率。