Resonance electron attachment to short-tail analogs of coenzyme Q₁₀ is investigated in the electron energy range 0 eV–14 eV under gas-phase conditions by means of dissociative electron attachment spectroscopy. Formation of long-lived (milliseconds) molecular negative ions is detected at 1.2 eV, but not at thermal energy. A huge increase in the electron detachment time as compared with the reference para-benzoquinone (40 µs) is ascribed to the presence of the isoprene side chains. Elimination of a neutral CH₃ radical is found to be the most intense decay detected on the microsecond time scale. The results give some insight into the timescale of electron-driven processes stimulated in living tissues by high-energy radiation and are of importance in prospective fields of radiobiology and medicine.

中文翻译：

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电离辐射和活细胞的天然成分：与辅酶Q类似物的低能电子相互作用。

通过离解电子附着光谱研究了在气相条件下电子能量为0 eV–14 eV时，辅酶Q ₁₀短尾类似物的共振电子附着。在1.2 eV时检测到长寿命（毫秒）分子负离子的形成，但在热能时未检测到。在电子脱离时间与基准相比，大幅增加对苯醌（40 μ S）是归因于异戊二烯侧链的存在。消除中性CH ₃发现自由基是在微秒时间尺度上检测到的最强烈的衰减。结果为高能量辐射在活组织中刺激电子驱动过程的时间尺度提供了一些见识，并且在放射生物学和医学的预期领域中具有重要意义。