俄罗斯尼古拉耶夫无机化学研究所Alexander V. Artemev研究小组，提出了基于定制手性Re(CO)₃发射体的铼基圆极化有机发光二极管研究。相关论文发表在2024年12月16日出版的《德国应用化学》杂志上。

据了解，显示圆极化磷光（CPP）的手性铼(I)发射体是圆极化有机发光二极管（CP-OLED）的一个有吸引力的支柱。然而，这种发射体的效率并不理想，而且它们从未被用于圆极化电致发光（CPEL）应用。

研究人员定制了具有改进圆极化磷光（CPP）性能的稳健手性Re(I)配合物，并首次演示了来自铼发射体的圆极化电致发光（CPEL）。他们所设计的手性Re(I)配合物呈现黄色CPP， |glum|因子增强（高达2.5×10^-2），量子效率良好。该开创性的基于Re(I)的圆极化有机发光二极管（基于获得的发射器）显示出黄色CPEL， |gEL|因子高达6.2×10^-3，最大外量子效率为13.2%。

此外，研究团队首次证明了磁场对Re(I)发射体CPP强度的抑制作用。这项工作突出了手性Re(I)发射体在CPEL应用中的良好潜力，为CPP活性Re(I)配合物开辟了一条新的捷径。

附：英文原文

Title: Toward Rhenium-based Circularly Polarized OLEDs Using Tailored Chiral Re(CO)3 Emitters

Author: Maria P. Davydova, Ting Xu, Alexander M. Agafontsev, Lingqiang Meng, Mariusz Wolff, Maxim Yu. Petyuk, Irina Yu. Bagryanskaya, Alexey S. Berezin, Alexey V. Tkachev, Hong Meng, Alexander V. Artemev

Issue&Volume: 2024-12-16

Abstract: Chiral rhenium(I) emitters showing circularly polarized phosphorescence (CPP) are an attractive mainstay for CP organic light-emitting diodes (CP-OLEDs). However, the efficiency of such  emitters is not ideal, and they have never been explored for circularly polarized electroluminescence (CPEL) applications. Here, we have tailored robust chiral Re(I) complexes with improved CPP properties, and firstly  demonstrated CPEL from rhenium emitters. The designed chiral Re(I) complexes exhibit a yellow CPP with enhanced |glum| factors (up to 2.5×10^–2) and a good quantum efficiency. The pioneering Re(I)-based CP-OLEDs (based on the obtained emitters) exhibit yellow CPEL with |gEL| factors of up to 6.2×10^–3 and maximal external quantum efficiency of 13.2%. Furthermore, we have demonstrated for the first time a suppressive effect of a magnetic field on the CPP strength of Re(I) emitters. This work highlights the good potential of chiral Re(I) emitters for CPEL applications, and opens up a new shortcut to CPP-active Re(I) complexes.

DOI: 10.1002/anie.202419788

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202419788