Laboratory infrared spectra and fragmentation chemistry of sulfur allotropes

Author:

Ferrari PieroORCID,Berden GielORCID,Redlich Britta,Waters Laurens B. F. M.,Bakker Joost M.ORCID

Abstract

AbstractSulfur is one of six life-essential elements, but its path from interstellar clouds to planets and their atmospheres is not well known. Astronomical observations in dense clouds have so far been able to trace only 1 percent of cosmic sulfur, in the form of gas phase molecules and volatile ices, with the missing sulfur expected to be locked in a currently unidentified form. The high sulfur abundances inferred in icy and rocky solar system bodies indicate that an efficient pathway must exist from volatile atomic sulfur in the diffuse interstellar medium to some form of refractory sulfur. One hypothesis is the formation of sulfur allotropes, particularly of the stable S8. However, experimental information about sulfur allotropes under astrochemically relevant conditions, needed to constrain their abundance, is lacking. Here, we report the laboratory far-infrared spectra of sulfur allotropes and examine their fragmentation pathways. The spectra, including that of cold, isolated S8 with three bands at 53.5, 41.3 and 21.1 µm, form a benchmark for computational modelling, which show a near-perfect match with the experiments. The experimental fragmentation pathways of sulfur allotropes, key information for astrochemical formation/destruction models, evidence a facile fragmentation of S8. These findings suggest the presence of sulfur allotropes distributions in interstellar space or in the atmosphere of planets, dependent on the environmental conditions.

Publisher

Springer Science and Business Media LLC

Reference50 articles.

1. Krijt, et al. In Protostars and Planets VII, (eds) Inutsuka, S., Aikawa, Y., Muto, T., Tomida, K. & Tamura, M., ASP conference series. 1031 (2023).

2. Greenwood, N. N. & Earnshaw, A. Chemistry of the Elements. (Elsevier, Oxford, 1997).

3. Mifsud, D. V. et al. Sulfur ice astrochemistry: a review of laboratory studies. Space Sci. Rev. 217, 14 (2021).

4. Fuente, A. et al. PDRs4All. IX. Sulfur elemental abundance in the Orion Bar. A&A 687, A87 (2024).

5. Hily-Blant, P., Pineau des Forêts, G., Faure, A. & Lique, F. Sulfur gas-phase abundance in dense cores. A&A 658, A168 (2022).

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3