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Influence of trace aromatics on the chemical growth mechanisms of Titan aerosol analogues

机译：痕量芳烃对泰坦气溶胶类似物化学生长机理的影响

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摘要

The chemical structure and formation pathways of Titan aerosols remain largely unknown. In this work, we studied the effect of trace aromatics on the chemical composition and formation pathways of laboratory analogues of Titan's organic aerosols. The aerosol analogues were produced using four different trace aromatic molecules, comprised of one or two aromatic rings, each with or without a nitrogen heteroatom. Samples were then analyzed by laser desorption/ionization Mass Spectrometry (LDMS), revealing a high variability in the sample composition depending on the trace aromatic used. Our work reveals that the final chemical structure of the aerosols depends strongly on the number of aromatic rings in the trace molecule, leading either to a polymeric or to a random co-polymeric growth of the sample. These different chemical structures can affect the physical properties of the aerosol. Future analysis of Titan's aerosols using better resolution could potentially determine whether either of the growth hypotheses are preferred.
机译：泰坦气溶胶的化学结构和形成途径在很大程度上仍然未知。在这项工作中，我们研究了痕量芳烃对泰坦有机气溶胶实验室类似物的化学组成和形成途径的影响。使用四个不同的痕量芳族分子（包括一个或两个带有或不带有氮杂原子的芳环）组成的气溶胶类似物。然后通过激光解吸/电离质谱（LDMS）分析样品，显示出样品成分的高可变性，取决于所使用的痕量芳族化合物。我们的工作表明，气溶胶的最终化学结构在很大程度上取决于痕量分子中芳环的数量，从而导致样品的聚合或无规共聚生长。这些不同的化学结构会影响气雾剂的物理性质。使用更好的分辨率对Titan气溶胶进行的未来分析可能会确定是否倾向于使用两种增长假说。

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  • 来源
    《Planetary and space science》 |2017年第6期|27-34|共8页
  • 作者

    Gautier Thomas; Sebree Joshua A.; Li Xiang; Pinnick Veronica T.; Grubisic Andrej; Loeffler Mark J.; Getty Stephanie A.; Trainer Melissa G.; Brinckerhoff William B.;

  • 作者单位

    NASA, Goddard Space Flight Ctr, Code 699,8800 Greenbelt Rd, Greenbelt, MD 20771 USA|Univ Space Res Assoc, Ctr Res & Explorat Space Sci & Technol, Columbia, MD USA|CNES, Lab Phys Interact Ion & Mol, UMR 7345, Marseille, France;

    Univ Northern Iowa, Cedar Falls, IA 50614 USA;

    NASA, Goddard Space Flight Ctr, Code 699,8800 Greenbelt Rd, Greenbelt, MD 20771 USA|Univ Maryland Baltimore Cty, Ctr Res & Explorat Space Sci & Technol, Baltimore, MD 21228 USA;

    NASA, Goddard Space Flight Ctr, Code 699,8800 Greenbelt Rd, Greenbelt, MD 20771 USA|Univ Maryland Baltimore Cty, Ctr Res & Explorat Space Sci & Technol, Baltimore, MD 21228 USA;

    NASA, Goddard Space Flight Ctr, Code 699,8800 Greenbelt Rd, Greenbelt, MD 20771 USA|Univ Maryland Coll Pk, Ctr Res & Explorat Space Sci & Technol, College Pk, MD USA;

    NASA, Goddard Space Flight Ctr, Code 699,8800 Greenbelt Rd, Greenbelt, MD 20771 USA;

    NASA, Goddard Space Flight Ctr, Code 699,8800 Greenbelt Rd, Greenbelt, MD 20771 USA;

    NASA, Goddard Space Flight Ctr, Code 699,8800 Greenbelt Rd, Greenbelt, MD 20771 USA;

    NASA, Goddard Space Flight Ctr, Code 699,8800 Greenbelt Rd, Greenbelt, MD 20771 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Titan aerosols; Tholins; LDMS; PAHs; Polymer;

    机译：泰坦气溶胶;索林;LDMS;PAHs;聚合物;

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