陨石-常见氨基酸诱导粘土剥落和非生物室形成。

IF 8.9 1区 地球科学 Q1 ENVIRONMENTAL SCIENCES
Communications Earth & Environment Pub Date : 2025-01-01 Epub Date: 2025-06-05 DOI:10.1038/s43247-025-02417-8
Orr Rose Bezaly, Annemieke Petrignani, Helen E King
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引用次数: 0

摘要

粘土表面被认为是生命起源过程中的重要组成部分,因为它们具有浓缩有机物和非生物催化(生物)聚合物生产的能力。尽管如此,有机-粘土相互作用的相互性质的重要性,以及这种相互作用中外星有机物的影响,在很大程度上是一个未被探索的领域。我们证明了一种以前未被认识到的现象,这种现象发生在蒙脱土粘土与陨石(常见的非蛋白质源性γ-氨基丁酸)的短暂相互作用中。衰减全反射傅立叶变换红外光谱和x射线衍射表明,外来物质引起了不可逆的结构变化。利用透射电子显微镜观察到,在原始结构的中间层中,明显的局部粘土剥落与纳米级空腔的形成有关。这项工作表明,外源氨基酸可以改变粘土并引入三维受限纳米环境,这可能促进益生元时代的区隔化。我们的发现还强调了适用于环境/材料科学的新的可持续纳米复合材料合成路线。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Meteorite-common amino acid induces clay exfoliation and abiotic compartment formation.

Clay surfaces have been invoked as crucial components in the origin of life processes due to their ability to concentrate organics and abiotically catalyse (bio)polymer production. Still, the importance of the mutual nature of organo-clay interactions and the effects of off-world organics in this interplay is a largely unexplored realm. We demonstrate a previously unrecognised phenomenon that occurs upon the transient interaction of montmorillonite clay with the meteorite-common, non-proteinogenic γ-aminobutyric acid. Attenuated total reflectance Fourier transform infrared spectroscopy and X-ray diffraction show that an irreversible structural change is induced by the off-world species. A distinct partial clay exfoliation is correlated with the formation of nanoscale cavities in the mid-layers of the original structure, observable using transmission electron microscopy. This work demonstrates that an exogenous amino acid can alter clay and introduce 3D confined nano-environments, which may facilitate compartmentalisation in prebiotic times. Our findings also highlight new sustainable nanocomposite synthesis routes applicable in environmental/materials sciences.

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来源期刊
Communications Earth & Environment
Communications Earth & Environment Earth and Planetary Sciences-General Earth and Planetary Sciences
CiteScore
8.60
自引率
2.50%
发文量
269
审稿时长
26 weeks
期刊介绍: Communications Earth & Environment is an open access journal from Nature Portfolio publishing high-quality research, reviews and commentary in all areas of the Earth, environmental and planetary sciences. Research papers published by the journal represent significant advances that bring new insight to a specialized area in Earth science, planetary science or environmental science. Communications Earth & Environment has a 2-year impact factor of 7.9 (2022 Journal Citation Reports®). Articles published in the journal in 2022 were downloaded 1,412,858 times. Median time from submission to the first editorial decision is 8 days.
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