Laboratory Detection of Cyanoacetic Acid: A Jet-cooled Rotational Study

被引：4
作者：
Sanz-Novo, Miguel [1 ]
Leon, Iker [1 ]
Alonso, Elena R. [2 ,3 ]
Kolesnikova, Lucie [4 ]
Alonso, Jose L. [1 ]
机构：
[1] CSIC, Grp Espect Mol GEM, Area Quim Fis, Unidad Asociada,Lab Espect & Bioespect, Edificio Quifima,Parque Cient UVa, E-47011 Valladolid, Spain
[2] Univ Pais Vasco UPV EHU, Fac Ciencia & Tecnol, Dept Quim Fis, Barrio Sarriena S-N, Leioa 48940, Spain
[3] Univ Basque Country, Inst Biofis UPV EHU, CSIC, UPV EHU, Leioa, Spain
[4] Univ Chem & Technol, Dept Analyt Chem, Tech 5, Prague 16628 6, Czech Republic
来源：
ASTROPHYSICAL JOURNAL | 2021年 / 915卷 / 02期
基金：
欧洲研究理事会;
关键词：
TRANSFORM MICROWAVE SPECTROMETER; CORRELATED MOLECULAR CALCULATIONS; GAUSSIAN-BASIS SETS; INTERSTELLAR; RELAXATION; CONFORMERS; MILLIMETER; SPECTRUM; GLYCINE;
D O I：
10.3847/1538-4357/ac013f
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Herein we present a laboratory rotational study of cyanoacetic acid (CH2(CN)C(O)OH), an organic acid as well as a -CN-bearing molecule, which is a candidate molecular system to be detected in the interstellar medium (ISM). Our investigation aims to provide direct experimental frequencies of cyanoacetic acid to guide its eventual astronomical search in low-frequency surveys. Using different jet-cooled rotational spectroscopic techniques in the time domain, we have determined a precise set of the relevant rotational spectroscopic constants, including the N-14 nuclear quadrupole coupling constants for the two distinct structures, cis- and gauche-cyanoacetic acid. We believe this work will potentially allow the detection of cyanoacetic acid in the ISM, whose rotational features have remained unknown until now.
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页数：8
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