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用低压汞灯照射磷酸三丁酯(TBP)体系,发现1849A和2537A能分别激发TBP分子,产生两种激发分子,前者的动力学性质和~(60)Coγ辐解产生的第一态相同,光谱研究证明这是n-π跃迁的单重激发态,其寿命均为8×10~(-8)秒,后者的动力学性质和~(60)Coγ辐解产生的第二态相同,可能为三重激发态。 用磷酸二丁酯探测烷烃激发态,已引起国内外一些学者的注意。前已报道,γ辐解TBP的主要酸性产物磷酸二丁酯与磷酸一丁酯是通过三种活性粒子中间体生成的,用多种能量接受体能明确区分这三种活性粒子,称之为第一种激发态、第二种激发态与第三种不受保护剂影响的激发态或超激态。然而对这三种态的本质尚未明确阐明。本工作对比研究了1850A和2537A紫外光解TBP体系与γ辐解TBP体系以及TBP的光谱,试图进一步了解TBP三种活性粒子的本质。
The results showed that 1849A and 2537A could stimulate TBP molecules respectively to produce two kinds of excited molecules. The former had the same kinetic properties as the first state produced by ~ (60) Coγ, Spectral studies have shown that this is a singlet excited state of n-π transition with a lifetime of 8 × 10 ~ (-8) s. The kinetic property of the latter is the same as that of ~ (60) Coγ. May be triple excited state. Detection of paraffin excited states by dibutyl phosphate has attracted the attention of some scholars at home and abroad. It has been previously reported that the main acidic products of γ-radiation TBP, dibutyl phosphate and monobutyl phosphate, are generated by three active particle intermediates, and the three active particles are clearly distinguished by a variety of energy receptors, An excited state, a second excited state, and a third excited or hyperased state that are unaffected by the protective agent. However, the essence of these three states has not yet been clearly stated. In this work, the spectra of 1850A and 2537A UV-TBP systems, γ-radiation TBP system and TBP were compared in order to further understand the nature of TBP active particles.