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

doi:10.3847/1538-4357/ac091c

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	Propionamide (C2H5CONH2): The Largest Peptide-like Molecule in Space
	Li,Juan 2,3; Wang,Junzhi 2,3; Lu,Xing 4; Ilyushin,Vadim 5,6; Motiyenko,Roman A.7; Gou,Qian 8; Alekseev,Eugene A.5,6; Quan,Donghui 9,10; Margulès,Laurent 7; Gao,Feng 11,12
刊名	The Astrophysical Journal
	2021-09-01
卷号	919 期号:1 页码:18
关键词	Astrochemistry Spectral line identification Spectroscopy
ISSN号	0004-637X
DOI	10.3847/1538-4357/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.
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关键词	MICROWAVE-SPECTRUM ; DIPOLE-MOMENT ; INTERSTELLAR ; SPECTROSCOPY
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	The American Astronomical Society
WOS记录号	IOP:0004-637X-919-1-AC091C
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
内容类型	期刊论文
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	1.11615 Settlers Circle, Germantown MD 20876, USA 2.Department of Radio Science and Technology, Shanghai Astronomical Observatory, 80 Nandan Road, Shanghai 200030, People’s Republic of Chinalijuan@shao.ac.cn, jzwang@shao.ac.cn 3.Key Laboratory of Radio Astronomy, Chinese Academy of Sciences, People’s Republic of China 4.National Astronomical Observatory of Japan, 2-21-1 Osawa, Mitaka, Tokyo, 181-8588, Japan 5.Institute of Radio Astronomy of NASU, Mystetstv 4, 61002 Kharkiv, Ukraine 6.Quantum Radiophysics Department, V.N. Karazin Kharkiv National University, Svobody Square 4, 61022 Kharkiv, Ukraine 7.Laboratoire de Physique des Lasers, Atomes, et Molécules, UMR CNRS 8523, Université de Lille I, F-59655 Villeneuve d’Ascq Cédex, France 8.School of Chemistry and Chemical Engineering, Chongqing University, Daxuecheng South Road 55, 401331, Chongqing, People’s Republic of China 9.Xinjiang Astronomical Observatory, Chinese Academy of Sciences, 150 Science 1-Street, Urumqi 830011, People’s Republic of China 10.Department of Chemistry, Eastern Kentucky University, Richmond, KY 40475, USA
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.