固态Ethanolamine的Ly-α处理：糖和肽衍生物的潜在前体
Ly-$α$ processing of solid-state Ethanolamine: Potential Precursors to Sugar and Peptide Derivatives
AI总结：
本研究探讨了固态Ethanolamine在Ly-α辐射下的光稳定性及其在分子云中形成生命前体分子的潜在作用，发现EA可能促进糖和肽衍生物等生命前体分子的形成，对生命起源具有启示意义。
摘要：
Ethanolamine（EA，磷脂的关键成分）最近在分子云内的星际介质中被探测到。为了理解这一观测结果，对其形成和破坏的实验室研究至关重要，并应由天体化学模型加以补充。本研究探讨了EA冰在10 K下接受Lyman（Ly）-α（10.2 eV）辐射的光稳定性，并考察了其在分子云中简单和复杂有机分子形成的潜在作用。EA的紫外破坏截面估计为(4.7±0.3)×10^-18 cm^2，为其在致密星际云中6.5×10^7年的半衰期提供了见解。使用傅里叶变换红外光谱和四极杆质谱法鉴定了各种光产物，并讨论了它们的形成路径。在辐射后的升温过程中初步探测到了乙二醇和丝氨酸，表明EA可能促进糖、肽及其衍生物等生命前体分子的形成。质谱仪中检测到的高质量信号表明存在多种复杂有机分子，计划在未来的工作中对室温下的残留物进行进一步分析。结果表明，EA可能促进太空中生命前体分子的形成，对生命起源具有启示意义。
英文摘要：
Ethanolamine (EA), a key component of phospholipids, has recently been detected in the interstellar medium within molecular clouds. To understand this observation, laboratory studies of its formation and destruction are essential and should be complemented by astrochemical models. This study investigates the photostability of EA ice under Lyman (Ly)-$α$ (10.2 eV) irradiation at 10 K, and explores its potential role in the formation of simple and complex organic molecules in molecular clouds. The UV destruction cross section of EA was estimated to be ($4.7\pm0.3)\times10^{-18}$ cm$^2$, providing insight into its half-life of $6.5\times10^{7}$ yr in dense interstellar clouds. Fourier transform infrared spectroscopy and quadrupole mass spectrometry were used to identify various photoproducts, with their formation pathways discussed. Ethylene glycol and serine were tentatively detected during the warming up process following irradiation, suggesting that EA could contribute to the formation of prebiotic molecules such as sugars, peptides and their derivatives. High mass signals detected in the mass spectrometer suggest the presence of several complex organic molecules, and further analysis of residues at room temperature is planned for future work. The results suggest that EA could contribute to the formation of prebiotic molecules in space, with implications for the origin of life.
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