Phosphorescent platinum(II) complexes bearing 2-vinylpyridine-type ligands: synthesis, electrochemical and photophysical properties, and tuning of electrophosphorescent behavior by main-group moieties.
Phosphorescent platinum(II) complexes bearing 2-vinylpyridine-type ligands: synthesis, electrochemical and photophysical properties, and tuning of electrophosphorescent behavior by main-group moieties.
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DOI：
10.1021/ic502122t
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发表时间：
2014-12
影响因子：
4.6
通讯作者：
Xiaolong Yang;Xianbin Xu;Jiang Zhao;Jingshuang Dang;Zuan Huang;X. Yan;Guijiang Zhou;Dongdong Wang-Dongdong-Wa
中科院分区：
文献类型：
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作者：
Xiaolong Yang;Xianbin Xu;Jiang Zhao;Jingshuang Dang;Zuan Huang;X. Yan;Guijiang Zhou;Dongdong Wang-Dongdong-Wa
成功制备了一系列具有不同主族嵌段（B(Mes)2、SiPh3、GePh3、NPh2、POPh2、OPh、SPh和SO2Ph，其中Mes=2-吗啉乙磺酸）的2-乙烯基吡啶型铂(II)配合物。 X射线单晶衍射表明，相关磷光铂(II)配合物在固态下表现出不同的分子堆积模式，从而在各个分子之间产生不同的相互作用。光物理表征表明，引入具有给电子或吸电子特征的不同主族部分也会影响这些配合物的发射最大值和磷光量子产率。此外，与2-苯基吡啶型类似物相比，这些2-乙烯基吡啶型铂(II)配合物表现出明显不同的光物理和电化学性质，例如较高位置的最高占据分子轨道能级和较低能量的磷光发射。重要的是，这些配合物可以显示出作为深红色磷光发射体的良好潜力，带来有吸引力的电致发光性能，国际照明委员会（CIE）坐标非常接近国家电视标准委员会推荐的标准红色CIE坐标（0.67，0.33）。因此，这些结果成功地建立了涉及光物理、电化学和电致发光的结构-性能关系，这不仅为这些新型配合物的光电特性提供了重要信息，而且为开发新型铂(II)磷光配合物提供了宝贵的线索。
A series of 2-vinylpyridine-type platinum(II) complexes bearing different main-group blocks (B(Mes)2, SiPh3, GePh3, NPh2, POPh2, OPh, SPh, and SO2Ph, where Mes = 2-morpholinoethanesulfonic acid) were successfully prepared. As indicated by the X-ray single-crystal diffraction, the concerned phosphorescent platinum(II) complexes exhibit distinct molecular packing patterns in the solid state to bring forth different interactions between individual molecules. The photophysical characterizations showed that the emission maxima together with phosphorescent quantum yield of these complexes can also be affected by introducing distinct main-group moieties with electron-donating or electron-withdrawing characters. Furthermore, these 2-vinylpyridine-type platinum(II) complexes exhibit markedly different photophysical and electrochemical properties compared with their 2-phenylpyridine-type analogues, such as higher-lying highest occupied molecular orbital levels and lower-energy phosphorescent emissions. Importantly, these complexes can show good potential as deep red phosphorescent emitters to bring attractive electroluminescent performances with Commission Internationale de L'Eclairage (CIE) coordinates very close to the standard red CIE coordinates of (0.67, 0.33) recommended by the National Television Standards Committee. Hence, these results successfully established structure-property relationship concerning photophysics, electrochemistry, and electroluminescence, which will not only provide important information about the optoelectronic features of these novel complexes but also give valuable clues for developing novel platinum(II) phosphorescent complexes.