Nonadiabatic reaction dynamics to silicon monosulfide (SiS): A key molecular building block to sulfur-rich interstellar grains.

Nonadiabatic reaction dynamics to silicon monosulfide (SiS): A key molecular building block to sulfur-rich interstellar grains.
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硅单硫化物(SIS)的非绝热反应动力学:富含硫的星际晶粒的关键分子构件。

DOI:
10.1126/sciadv.abg7003
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发表时间:
2021-06
期刊:
影响因子:
13.6
通讯作者:
Millar TJ
Millar TJ
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Doddipatla S;He C;Goettl SJ;Kaiser RI;Galvão BRL;Millar TJ

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这项研究揭示了硅单硫化物的非绝热动力学及其在富含硫晶粒的形成中的作用。 含硫和含硅的分子在星际和星际环境中是无所不在的,但它们的基本形成机制晦涩难懂。 - 在这里,我们通过实验室实验,计算和星体化学模型暴露,可以通过硫化物的氢与硫化物的气相反应来启动硅硫化学。反应动力学。通往最简单的硅和硫硅烷的便利途径为恒星形成区域中硅单硫化物的起源提供了令人信服的证据,从而扩大了我们对银河系硫的生命周期的看法。
This study reveals the nonadiabatic dynamics of silicon monosulfide and its role in the formation of sulfur-rich grains. Sulfur- and silicon-containing molecules are omnipresent in interstellar and circumstellar environments, but their elementary formation mechanisms have been obscure. These routes are of vital significance in starting a chain of chemical reactions ultimately forming (organo) sulfur molecules—among them precursors to sulfur-bearing amino acids and grains. Here, we expose via laboratory experiments, computations, and astrochemical modeling that the silicon-sulfur chemistry can be initiated through the gas-phase reaction of atomic silicon with hydrogen sulfide leading to silicon monosulfide (SiS) via nonadiabatic reaction dynamics. The facile pathway to the simplest silicon and sulfur diatomic provides compelling evidence for the origin of silicon monosulfide in star-forming regions and aids our understanding of the nonadiabatic reaction dynamics, which control the outcome of the gas-phase formation in deep space, thus expanding our view about the life cycle of sulfur in the galaxy.
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影响因子: 4.9
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