Circularly Polarized Luminescent Bis(Boron Difluoride) Complexes with Chiral Schiff‐base Ligands
Circularly Polarized Luminescent Bis(Boron Difluoride) Complexes with Chiral Schiff‐base Ligands
复制标题
手性希夫碱配体的圆偏振发光双（二氟化硼）配合物
DOI：
10.1002/cptc.202200318
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发表时间：
2023
期刊：
影响因子：
3.7
通讯作者：
Tsuno Takashi
中科院分区：
文献类型：
--
作者：
Ikeshita Masahiro;Oka Taichi;Kitahara Maho;Imai Yoshitane;Tsuno Takashi
本文描述了具有手性希夫碱配体的双（二氟化硼）配合物的合成、结构和圆偏振发光（CPL）性质。通过 BF3·OEt2 与相应的前驱体反应，制备了一系列基于萘骨架的手性席夫碱双（二氟化硼）配合物，并通过核磁共振波谱和 X 射线衍射（XRD）分析鉴定了分子结构。这些配合物在稀溶液中表现出高效的光致发光，发射量子产率 (Φ) 高达 0.99。还研究了分子的圆偏振发光特性。与溶液相比，在 KBr 分散颗粒状态下，发光不对称因子 (glum) 的绝对值显着增加至 1.2×10−2。通过DFT计算进一步研究了光物理性质。
The syntheses, structures, and circularly polarized luminescence (CPL) properties of bis(boron difluoride) complexes with chiral Schiff‐base ligands are described herein. A series of chiral Schiff‐base bis(boron difluoride) complexes based on the naphthalene backbone were prepared by reacting BF3⋅OEt2with the corresponding precursors, and the molecular structures were identified by NMR spectroscopy and X‐ray diffraction (XRD) analysis. These complexes exhibited efficient photoluminescence in dilute solution with high emission quantum yields (Φ) up to 0.99. The circularly polarized luminescence properties of the molecules were also investigated. Compared to solution, in the KBr dispersed pellet state the absolute value of the luminescence dissymmetry factor (glum) was significantly increased up to 1.2×10−2. The photophysical properties were further investigated by means of DFT calculations.