含铵阳离子的手性四（铕（III））配合物用于增强圆偏振发光

Chiral Tetrakis Eu(III) Complexes with Ammonium Cations for Improved Circularly Polarized Luminescence.

作者信息

Tsurui Makoto, Takizawa Ryohei, Kitagawa Yuichi, Wang Mengfei, Kobayashi Masato, Taketsugu Tetsuya, Hasegawa Yasuchika

机构信息

Graduate School of Chemical Sciences and Engineering, Hokkaido University, Kita 13, Nishi 8, Kita-ku, Sapporo, Hokkaido, 060-8628, Japan).

Faculty of Engineering, Hokkaido University, Kita 13, Nishi 8, Kita-ku, Sapporo, Hokkaido, 060-8628, Japan).

出版信息

Angew Chem Int Ed Engl. 2024 Aug 19;63(34):e202405584. doi: 10.1002/anie.202405584. Epub 2024 Jul 9.

DOI:10.1002/anie.202405584

PMID:38797714

Abstract

Large dissymmetry factor of the circularly polarized luminescence (g) was observed in ligand and coordination tuned chiral tetrakis europium (Eu(III)) complexes with ammonium cations. The g value was estimated to be -1.54, which is the largest among chiral luminescent molecules. Through photophysical measurements, single crystal X-ray structural analyses and quantum chemical calculations, changes in the geometric and electronic structures were observed for a series of chiral tetrakis Eu(III) complexes which enhanced the g value. The emission quantum yield and photosensitized energy transfer efficiencies of chiral Eu(III) complexes with ammonium cations were also larger than those of chiral Eu(III) complex with Cs. Based on the systematic modifications and analyses for chiral tetrakis Eu(III) complex, effect of the ammonium cation on enhanced CPL brightness is reported.

摘要

在含有铵阳离子的配体和配位调节的手性四铕（Eu(III)）配合物中观察到圆偏振发光的大不对称因子（g）。g值估计为-1.54，这在手性发光分子中是最大的。通过光物理测量、单晶X射线结构分析和量子化学计算，观察到一系列手性四铕（Eu(III)）配合物的几何和电子结构发生了变化，从而提高了g值。含有铵阳离子的手性Eu(III)配合物的发射量子产率和光敏能量转移效率也高于含铯的手性Eu(III)配合物。基于对手性四铕（Eu(III)）配合物的系统修饰和分析，报道了铵阳离子对增强圆偏振发光亮度的影响。