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Propionamide (C2H5CONH2): The Largest Peptide-like Molecule in Space

文献类型：期刊论文

作者Li,Juan18,19; Wang,Junzhi18,19; Lu,Xing17; Ilyushin,Vadim15,16; Motiyenko,Roman A.14; Gou,Qian13; Alekseev,Eugene A.15,16; Quan,Donghui11,12; Margulès,Laurent14; Gao,Feng9,10
刊名The Astrophysical Journal
出版日期2021-09-01
卷号919期号:1页码:18
关键词Astrochemistry Spectral line identification Spectroscopy
ISSN号0004-637X
DOI10.3847/1538-4357/ac091c
通讯作者Li,Juan()
英文摘要Abstract Peptide bonds, as the molecular bridges that connect amino acids, are crucial to the formation of proteins. Searches and studies of molecules with embedded peptide-like bonds are thus important for the understanding of protein formation in space. Here we report the first tentative detection of propionamide (C2H5CONH2), the largest peptide-like molecule detected in space toward Sagittarius B2(N1) at a position called N1E that is slightly offset from the continuum peak. New laboratory measurements of the propionamide spectrum were carried out in the 9–461 GHz range, which provide good opportunity to check directly for the transition frequencies of detected interstellar lines of propionamide. Our observing result indicates that propionamide emission comes from the warm, compact cores in Sagittarius B2, in which massive protostellars are forming. The column density of propionamide toward Sgr B2(N1E) was derived to be 1.5 × 1016 cm?2, which is three-fifths of that of acetamide, and one-nineteenth of that of formamide. This detection suggests that large peptide-like molecules can form and survive during star-forming process and may form more complex molecules in the interstellar medium (ISM). The detection of propionamide bodes well for the presence of polypeptides, as well as other complex prebiotic molecules in the ISM.
WOS关键词MICROWAVE-SPECTRUM ; DIPOLE-MOMENT ; INTERSTELLAR ; SPECTROSCOPY
资助项目Natural Science Foundation of China[11773054] ; Natural Science Foundation of China[U1731237] ; Natural Science Foundation of China[11590780] ; Natural Science Foundation of China[11590784] ; Natural Science Foundation of China[11973075] ; Natural Science Foundation of China[U1931104] ; Fundamental Research Funds for the Central Universities[2020CDJXZ002] ; Programme National Physique et Chimie du Milieu Interstellaire (PCMI) of CNRS/INSU
WOS研究方向Astronomy & Astrophysics
语种英语
WOS记录号IOP:0004-637X-919-1-AC091C
出版者The American Astronomical Society
资助机构Natural Science Foundation of China ; Fundamental Research Funds for the Central Universities ; Programme National Physique et Chimie du Milieu Interstellaire (PCMI) of CNRS/INSU
源URL[http://ir.xao.ac.cn/handle/45760611-7/4243]  
专题天体化学研究团组
通讯作者Li,Juan
作者单位1.School of Astronomy and Space Science, Nanjing University, Nanjing 210093, People’s Republic of China
2.University of Chinese Academy of Sciences, 19A Yuquanlu, Beijing 100049, People’s Republic of China
3.School of Astronomy and Space Science, University of Science and Technology of China, Hefei 230026, People’s Republic of China
4.Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210034, People’s Republic of China
5.Korea Astronomy and Space Science Institute, 776 Daedeokdae-ro, Yuseong-gu, Daejeon 34055, Republic of Korea
6.Department of Astronomy, University of Michigan, Ann Arbor, MI 48109, USA
7.Guest worker at Sensor Science Division, National Institute of Standards and Technology, Gaithersburg, MD 20899 USA
8.11615 Settlers Circle, Germantown MD 20876, USA
9.Max Planck Institute for Extraterrestrial Physics (MPE), Giessenbachstr. 1, D-85748 Garching, Germany
10.Hamburger Sternwarte, Universit?t Hamburg, Gojenbergsweg 112, D-21029, Hamburg, Germany
推荐引用方式
GB/T 7714		 Li,Juan,Wang,Junzhi,Lu,Xing,et al. Propionamide (C2H5CONH2): The Largest Peptide-like Molecule in Space[J]. The Astrophysical Journal,2021,919(1):18.
APA Li,Juan.,Wang,Junzhi.,Lu,Xing.,Ilyushin,Vadim.,Motiyenko,Roman A..,...&Zheng,Xingwu.(2021).Propionamide (C2H5CONH2): The Largest Peptide-like Molecule in Space.The Astrophysical Journal,919(1),18.
MLA Li,Juan,et al."Propionamide (C2H5CONH2): The Largest Peptide-like Molecule in Space".The Astrophysical Journal 919.1(2021):18.

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