Functional Pyrimidinyl Pyrazolate Pt(II) Complexes: Role of Nitrogen Atom in Tuning the Solid‐State Stacking and Photophysics
作者:Paramaguru Ganesan、Wen‐Yi Hung、Jen‐Yung Tso、Chang‐Lun Ko、Tsai‐Hui Wang、Po‐Ting Chen、Hsiu‐Fu Hsu、Shih‐Hung Liu、Gene‐Hsiang Lee、Pi‐Tai Chou、Alex K.‐Y. Jen、Yun Chi
DOI:10.1002/adfm.201900923
日期:2019.6
Pt(II) metal complexes are known to exhibit strong solid‐state aggregation and are promising for realization of efficient emission in fabrication of organic light emitting diodes (OLED) with nondoped emitter layer. Four pyrimidine–pyrazolate based chelates, together with four isomeric Pt(II) metal complexes, namely: [Pt(pm2z)2], [Pt(tpm2z)2], [Pt(pm4z)2], and [Pt(tpm4z)2], are isolated and systematically
已知Pt(II)金属络合物具有很强的固态聚集性,并有望在具有非掺杂发射极层的有机发光二极管(OLED)的制造中实现高效发射。四种基于嘧啶-吡唑酸盐的螯合物,以及四种同分异构的Pt(II)金属络合物,即:[Pt(pm2z)2 ],[Pt(tpm2z)2 ],[Pt(pm4z)2 ]和[Pt(tpm4z)2个进行了隔离,并针对其在实际OLED应用中的结构-属性关系进行了系统地研究。光物理和机械变色测量,掠入射X射线衍射和理论方法揭示了详细的单分子和聚集结构。这些结果表明,这些Pt(II)发射体在真空沉积下像扑克牌一样堆积,其发射能量不仅受单分子设计的影响,而且还受到分子间堆积相互作用的显着影响,即Pt···按以下顺序排列的Pt间距:[Pt(tpm4z)2 ]> [Pt(pm4z)2 ]> [Pt(tpm2z)2 ]> [Pt(pm2z)2]。制备了发射范围从绿色到红色的非掺杂OLED,记录了[Pt(tpm2z)2