A new class of iridium(III) complexes based on fluorine substituted 2,3′-bipyridine and pyridyltetrazolate derivatives: Synthesis, crystal structures, photoluminescent and electroluminescent properties
作者:Longwei Zeng、Bo Yang、Denghui Liu、Hailiang Ni、Haifeng Wang、Kaijun Luo、Wenhao Yu、Weiguo Zhu、Congling Yang
DOI:10.1016/j.dyepig.2020.108514
日期:2020.9
The new cyclometalated iridium (III) complexes, (dfpypy)2Ir(BrPyTz) (a), (dfpypy)2Ir(CF3PyTz) (b), (tfpypy)2Ir(CF3PyTz) (c), and (dfpypy)2Ir(PzTz) (d), containing fluorine-substitued 2,3′-bipyridine as the main ligands and pyridyltetrazolate or pyrazinyltetrazolate derivatives as ancillary ligand were synthesized and characterized. The investigation of the crystal structures shows that there are intermolecular
新的环状金属化铱(III)配合物(dfpypy)2 Ir(BrPyTz)(a),(dfpypy)2 Ir(CF 3 PyTz)(b),(tfpypy)2 Ir(CF 3 PyTz)(c)和合成并表征了(dfpypy)2 Ir(PzTz)(d),其中氟取代的2,3'-联吡啶为主要配体,吡啶基四唑酸酯或吡嗪基四唑酸酯衍生物为辅助配体。对晶体结构的研究表明,铱(III)配合物中存在分子间的相互作用,包括π-π堆积,弱的非经典C–H⋯N氢键和F …π相互作用。此外,UV-vis光谱显示出浓度依赖性的特征。随着溶液浓度的增加,出现了两个较弱的较低能量吸收带,表明基态分子之间存在聚集体。除了在467 nm处具有发射峰的d以外,所有配合物均表现出蓝色光致发光(PL),在二氯甲烷溶液中的发射峰在约440 nm处,但是薄膜掺杂了10 wt%的聚甲基丙烯酸甲酯(PMMA)中的配合物,显示出增宽且明显在500和650