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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Sensitized Emission of Luminescent Lanthanide Complexes Based on a Phosphane Oxide Derivative
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Sensitized Emission of Luminescent Lanthanide Complexes Based on a Phosphane Oxide Derivative

机译：基于磷氧化物衍生物的发光镧系配合物的敏化发射

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摘要

The photophysical properties of a complex based on diphenylphosphanoethane (DPPE) fluorescent ligands linked to a europium ion have been investigated by different spectroscopic methods. Upon complexation with europium, the interaction of the phosphane oxide group with europium leads to a red shift of the absorption spectrum and a strong quenching of the ligand emission. The typical sensitized emission of Eu3+ is observed upon excitation of the ligand with a fluorescence quantum yield of 1%. Time-resolved absorption and emission experiments have been performed in order to investigate the photophysical mechanism involved in this complex. Photophysical studies show that an energy-transfer mechanism occurs from both the first excited singlet and triplet states of the ligand, and the population of the europium ion to the 5D1 state takes place, from which the 5D0 state is populated. Additionally, electron transfer from the excited singlet state of the ligand to the europium ion appears as a very efficient process.
机译：已经通过不同的光谱方法研究了基于与phenyl离子连接的二苯基膦基乙烷（DPPE）荧光配体的配合物的光物理性质。与with络合后，氧化膦基团与euro的相互作用导致吸收光谱的红移和配体发射的强烈猝灭。 Eu3 +的典型增感发射是在配体激发后以1％的荧光量子产率观察到的。已经进行了时间分辨的吸收和发射实验，以研究该复合物所涉及的光物理机制。光物理研究表明，配体的第一个激发单重态和三重态都发生了能量转移机制，and离子的团聚发生了5D1态，从中填充了5D0态。另外，电子从配体的激发单重态转移到the离子似乎是一个非常有效的过程。

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