Extraterrestrial organic matter has been widely studied; however, its response to pressure has not. Primitive organic matter bearing meteorites, such as CI and CM carbonaceous chondrites, have experienced variable pressures, up to 10 GPa. To appreciate the effects of these pressures on the organic content of these bodies, the model compounds isophthalic acid, vanillin, and vanillic acid were subjected to pressures of up to 11.5 GPa and subsequently decompressed. High-resolution synchrotron source Fourier transform infrared spectroscopy was used to determine the effects of different benzene substituents at high pressure on both the vibrational assignments of the benzene core of the molecules and the ability of the aromatic compounds to form intermolecular hydrogen bonds. The presence of additional peaks at high pressure was found to coincide with molecules that contain carboxyl groups; these features are interpreted as C–H···O intermolecular hydrogen bonds. The formation of these hydrogen bonds has implications for the origination of macromolecular organic matter (MOM), owing to the importance of such attractive forces during episodes of cross-linking, such as esterification. Pressure-induced hydrogen-bond formation is a process by which aromatic MOM precursors could have cross-linked to generate the organic polymers found within extraterrestrial bodies today.

中文翻译：

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压力对陨石有机物模型化合物的影响

地外有机物已被广泛研究。但是，它对压力的反应还没有。具有原始有机质的陨石，例如CI和CM碳质球粒陨石，经历了高达10 GPa的可变压力。为了了解这些压力对这些物体有机物的影响，对模型化合物间苯二甲酸，香兰素和香草酸施加了高达11.5 GPa的压力，然后进行了减压。高分辨率同步加速器源傅里叶变换红外光谱用于确定高压下不同苯取代基对分子苯核的振动分配以及芳族化合物形成分子间氢键的能力的影响。发现在高压下附加峰的存在与含有羧基的分子重合。这些特征被解释为C–H···O分子间氢键。这些氢键的形成对大分子有机物（MOM）的产生有影响，这是由于在交联（例如酯化）过程中这种吸引力的重要性。压力诱导的氢键形成是一个过程，通过该过程，芳香族​​MOM前驱物可以发生交联反应，以生成当今地球外物体中发现的有机聚合物。由于这种吸引力在交联过程（例如酯化）过程中的重要性。压力诱导的氢键形成是一个过程，通过该过程，芳香族​​MOM前驱物可以发生交联反应，以生成当今地球外物体中发现的有机聚合物。由于这种吸引力在交联过程（例如酯化）过程中的重要性。压力诱导的氢键形成是一个过程，通过该过程，芳香族​​MOM前驱物可以发生交联反应，以生成当今地球外物体中发现的有机聚合物。