This work describes an application of 1,2,4-triazine methodology for the synthesis of novel cyclometallated Pt(II) complexes of CˆN type. It is shown that addition of a cyclopenteno unit into the complex structure not only facilitates the fabrication of efficient solution-processed OLED devices (EQE_max = 10.7 %), but also imposes structural changes leading to even more soluble derivatives. Finally, it was shown that by varying the number of fused benzene rings in the CˆN ligand it is possible to tune the emission from green-blueish (Φ_PL = 0.15-0.43) to yellow-orange (Φ_PL = 0.25). 1,2,4-Triazine methodology gives unique opportunity to fuse additional benzene ring into the pyridine ring and provided the ligand L5 that contained previously unexplored large aromatic system. It was shown that such benzannulation is an effective way to achieve redshift in emission and give rise to solution-processable, single dopant OLED device showing emission spectrum resembling candle light.

这项工作描述了1,2,4-三嗪方法在合成新型CˆN型环金属化Pt（II）配合物中的应用。结果表明，向复杂结构中添加环戊烯单元不仅有助于制造高效的溶液加工的OLED器件（_最大EQE = 10.7％），而且还会引起结构变化，从而导致甚至更高的可溶性衍生物。最后，已表明通过改变CN稠合苯环的数目配体有可能调从绿青色（Φ发射_PL = 0.15-0.43）的黄橙色（Φ _PL= 0.25）。1,2,4-三嗪方法学提供了将额外的苯环融合到吡啶环中并提供含有先前未开发的大型芳族体系的配体L5的独特机会。结果表明，这种苯甲环化是实现发射红移并产生可溶液处理的单掺杂OLED器件的有效方法，该器件显示的发射光谱类似于烛光。