Investigating the Kinetics of Montmorillonite Clay-Catalyzed Conversion of Anthracene to 9,10-Anthraquinone in the Context of Prebiotic Chemistry.

IF 1.9 4区物理与天体物理 Q2 BIOLOGY

Origins of Life and Evolution of Biospheres Pub Date : 2018-09-01 Epub Date: 2018-09-10 DOI:10.1007/s11084-018-9562-9

Hope L Juntunen, Lucas J Leinen, Briann K Pitts, Samantha M O'Hanlon, Bethany P Theiling, Laura M Barge, Patrick Videau, Michael O Gaylor

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引用次数: 4

Abstract

Carbonaceous meteorites contributed polycyclic aromatic hydrocarbons (PAHs) to the organic inventory of the primordial Earth where they may have reacted on catalytic clay mineral surfaces to produce quinones capable of functioning as redox species in emergent biomolecular systems. To address the feasibility of this hypothesis, we assessed the kinetics of anthracene (1) conversion to 9,10-anthraquinone (2) in the presence of montmorillonite clay (MONT) over the temperature range 25 to 250 °C. Apparent rates of conversion were concentration independent and displayed a sigmoidal relationship with temperature, and conversion efficiencies ranged from 0.027 to 0.066%. Conversion was not detectable in the absence of MONT or a sufficiently high oxidation potential (in this case, molecular oxygen (O₂)). These results suggest a scenario in which meteoritic 1 and MONT interactions could yield biologically important quinones in prebiotic planetary environments.

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在前生物化学背景下研究蒙脱石粘土催化蒽转化为 9,10-蒽醌的动力学。

碳质陨石将多环芳烃（PAHs）带到了原始地球的有机库存中，它们可能在催化粘土矿物表面发生反应，生成能够在新出现的生物分子系统中发挥氧化还原作用的醌类物质。为了验证这一假设的可行性，我们评估了在蒙脱石粘土（MONT）存在下，蒽（1）在 25 至 250 °C 温度范围内转化为 9,10-蒽醌（2）的动力学过程。表观转化率与浓度无关，与温度呈正比关系，转化效率为 0.027% 至 0.066%。如果没有 MONT 或足够高的氧化电位（此处为分子氧 (O2)），则无法检测到转化。这些结果表明，在前生物行星环境中，陨石1和MONT的相互作用可以产生具有重要生物学意义的醌。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Origins of Life and Evolution of Biospheres 生物-生物学

CiteScore

3.20

自引率

15.00%

发文量

审稿时长

>12 weeks

期刊介绍： The subject of the origin and early evolution of life is an inseparable part of the general discipline of Astrobiology. The journal Origins of Life and Evolution of Biospheres places special importance on the interconnection as well as the interdisciplinary nature of these fields, as is reflected in its subject coverage. While any scientific study which contributes to our understanding of the origins, evolution and distribution of life in the Universe is suitable for inclusion in the journal, some examples of important areas of interest are: prebiotic chemistry and the nature of Earth''s early environment, self-replicating and self-organizing systems, the theory of the RNA world and of other possible precursor systems, and the problem of the origin of the genetic code. Early evolution of life - as revealed by such techniques as the elucidation of biochemical pathways, molecular phylogeny, the study of Precambrian sediments and fossils and of major innovations in microbial evolution - forms a second focus. As a larger and more general context for these areas, Astrobiology refers to the origin and evolution of life in a cosmic setting, and includes interstellar chemistry, planetary atmospheres and habitable zones, the organic chemistry of comets, meteorites, asteroids and other small bodies, biological adaptation to extreme environments, life detection and related areas. Experimental papers, theoretical articles and authorative literature reviews are all appropriate forms for submission to the journal. In the coming years, Astrobiology will play an even greater role in defining the journal''s coverage and keeping Origins of Life and Evolution of Biospheres well-placed in this growing interdisciplinary field.