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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Picosecond pulse radiolysis of the liquid diethyl carbonate
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Picosecond pulse radiolysis of the liquid diethyl carbonate

机译：液体碳酸二乙酯的皮秒脉冲辐解

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摘要

The diethyl carbonate, DEC, is an ester that is used as a solvent in Li-ion batteries, but its behavior under ionizing radiation was unknown. The transient optical absorption spectra, the decay kinetics, and the influence of various scavengers have been studied by using the picosecond laser-triggered electron accelerator ELYSE. In neat DEC, the intense near-IR (NIR) absorption spectrum is assigned to the solvated electron. It is overlapped in the visible range by another transient but longer-lived and less intense band that is assigned to the oxidized radical DEC(-H). The solvated electron molar absorption coefficients and radiolytic yield evolution from 25 ps, the geminate recombination kinetics, and the rate constants of electron transfer reactions to scavengers are determined. The radiolytic mechanism, indicating a certain radioresistance of DEC, is compared with that for other solvents.
机译：碳酸二乙酯DEC是一种酯，可在锂离子电池中用作溶剂，但在电离辐射下的行为尚不清楚。通过使用皮秒激光触发电子加速器ELYSE，研究了瞬态光吸收光谱，衰减动力学和各种清除剂的影响。在纯DEC中，强烈的近红外（NIR）吸收光谱分配给溶剂化电子。它在可见光范围内被分配给氧化自由基DEC（-H）的另一个瞬态但寿命更长且强度较低的谱带重叠。确定了溶剂化的电子摩尔吸收系数和从25 ps处的辐射解离产物的演化，双联体的重组动力学以及电子转移至清除剂的速率常数。将表明DEC具有一定抗辐射性的辐射分解机理与其他溶剂的辐射分解机理进行了比较。

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