Anion-Dependent Outstanding Luminescence Enhancement of Eu(D-facam)3 Upon Coexistence with the Tetramethyl ammonium Cation
Anion-Dependent Outstanding Luminescence Enhancement of Eu(D-facam)3 Upon Coexistence with the Tetramethyl ammonium Cation
复制标题
Eu(D-facam)3 与四甲基铵阳离子共存时阴离子依赖性出色的发光增强
DOI：
10.1002/cphc.202100609
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发表时间：
2021
期刊：
影响因子：
2.9
通讯作者：
Kazuki Nakamura and Norihisa Kobayashi
中科院分区：
文献类型：
--
作者：
Ziying Li;Haruki Minami;Kazuki Nakamura and Norihisa Kobayashi
研究了一系列具有不同反阴离子的四甲基铵盐对手性Eu（III）配合物（Eu(D - facam)3）光物理性质的影响。观察到Eu（III）配合物的阴离子依赖性发光，特别是在醋酸离子存在下，获得了显著的发光增强（bb0 300倍）和诱导圆偏振发光（glum= - 0.63）。利用关键光物理参数对能量传递过程进行了评价，发现在乙酸四甲基铵（TMAOAc）存在下，Eu（III）配合物的敏化效率显著提高。通过发光分析、圆二色光谱、傅里叶变换红外光谱和质谱测量证实了Eu(D‐facam)3与TMAOAc之间的相互作用。
The effect of a series of tetramethylammonium salts with different counter anions on the photophysical properties of a chiral Eu(III) complex (Eu(D‐facam)3) was investigated. Anion‐dependent luminescence of the Eu(III) complex was observed, and particularly in the presence of acetate ions, an outstanding luminescence enhancement (>300 times) and induced circularly polarized luminescence (glum=−0.63) were obtained. The energy transfer process was then evaluated using key photophysical parameters, and it was found that the sensitisation efficiency of the Eu(III) complex significantly increased in the presence of tetramethylammonium acetate (TMAOAc). The interactions between Eu(D‐facam)3and TMAOAc were confirmed by luminescence analysis, circular dichroism spectroscopy, Fourier transform infrared spectroscopy and mass spectral measurements.