Kitagawa Yuichi, Tsurui Makoto, Hasegawa Yasuchika
Faculty of Engineering and Graduate School of Chemical Sciences and Engineering, Hokkaido University, Kita-13, Nishi-8, Sapporo, Hokkaido 060-8628, Japan.
Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Kita-21, Nishi-10, Sapporo, Hokkaido 001-0021, Japan.
ACS Omega. 2020 Feb 7;5(8):3786-3791. doi: 10.1021/acsomega.9b03613. eCollection 2020 Mar 3.
Circularly polarized luminescence (CPL) is characterized by the differential emission of right and left circularly polarized light by a chiral molecule. This mini-review describes the recent developments in chiral trivalent europium (Eu(III)) complexes with effective CPL. CPL has many potential applications in security tags, lasers, and three-dimensional organic electroluminescence devices, which is one of the most intensely investigated topics in molecular luminophores. Eu(III) complexes have attracted considerable attention as effective CPL luminophores for the above-mentioned applications. In this review, recent studies on the Eu(III) CPL, including the steric (dimer, tetramer, aggregates, and coordination polymers) and electronic control (mononuclear) of Eu(III) complexes for the construction of a luminophore with effective CPL, are discussed. The characteristic CPL applications employing the chiral mononuclear Eu(III) complexes are also described. Chiral Eu(III) complexes with well-designed organic ligands can result in the establishment of new research areas in the fields of photochemistry and materials science.
圆偏振发光（CPL）的特征在于手性分子对右旋和左旋圆偏振光的差异发射。本综述描述了具有有效CPL的手性三价铕（Eu(III)）配合物的最新进展。CPL在安全标签、激光器和三维有机电致发光器件中有许多潜在应用，这是分子发光体中研究最深入的主题之一。Eu(III)配合物作为上述应用的有效CPL发光体已引起相当大的关注。在本综述中，讨论了关于Eu(III) CPL的最新研究，包括用于构建具有有效CPL的发光体的Eu(III)配合物的空间控制（二聚体、四聚体、聚集体和配位聚合物）和电子控制（单核）。还描述了采用手性单核Eu(III)配合物的典型CPL应用。具有精心设计的有机配体的手性Eu(III)配合物可导致在光化学和材料科学领域建立新的研究领域。
