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首页> 外文期刊>Chemistry: A European journal >Water-Binding Solid Scintillators: Synthesis, Emission Properties, and Tests in ~3H and ~14C Counting
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Water-Binding Solid Scintillators: Synthesis, Emission Properties, and Tests in ~3H and ~14C Counting

机译：水结合固体闪烁体：合成，发射特性和〜3H和〜14C计数中的测试

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摘要

Spectral and time-resolved fluorescence properties as well as relative fluorescence quantum yields of carbodiimide derivatives of 2,5-diphenyloxazole (PPO) (prepared by H_2S elimination from the corresponding thioureas), of some intermediates in the preparation, and of several other PPO derivatives were investigated in solution and in the solid stat to test their suitability as solid scintiallators. The carbodiimides reacted slowly with water udner acidic conditions to yield ureas. These systems were compared with solid mixtures of other PPO derivatives with sodium sulfate as a drying agent, as chemically water-binding solid scintiallators in ~3H and ~14C counting. Both the chemcially and the absorptive water-binding scintillators proved capable of counting ~3H and ~14C decay, and open a way to the counting of aqueous sampels by solid scintillators without a drying step.
机译：2,5-二苯恶唑（PPO）（通过从相应的硫脲中去除H_2S制备），制备中的某些中间体以及几种其他PPO衍生物的碳二亚胺衍生物的光谱和时间分辨荧光性质以及相对荧光量子产率在溶液中和固态统计中对它们进行了研究，以测试它们是否适合用作固态抑制剂。碳二亚胺与水在酸性条件下缓慢反应生成脲。将这些系统与其他PPO衍生物与硫酸钠作为干燥剂的固体混合物进行比较，以化学水结合性固体闪烁剂在〜3H和〜14C的条件下进行计数。化学和吸收性水结合闪烁体均被证明能够计数〜3H和〜14C衰减，并为固体闪烁体无需干燥步骤即可计数含水样品提供了一种途径。

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