A high-resolution spectroscopic analysis of aminoacrylonitrile and an interstellar search towards G+0.693

Abstract

Cyanides, ranging from three carbon atoms to PAHs, and alkenyl compounds are abundant in the interstellar medium (ISM). Aminoacrylonitrile (3-Amino-2-propenenitrile, H${}_2$N-CH=CH-CN), an alkenyl cyanide, thus represents a promising candidate for new interstellar detection. A comprehensive spectroscopic laboratory investigation of aminoacrylonitrile in its rotational ground vibrational state has been herein performed. The measurements carried out up to the THz regime made it possible to generate a precise set of reliable rest frequencies for its search in space up to sub-millimetre wavelengths. The $Z$-aminoacrylonitrile ($Z$-apn) isomer spectrum has been recorded employing a source-modulated sub-millimetre spectrometer, from 80 GHz to 1 THz. A combination of Doppler and sub-Doppler measurement regimes allowed to record 600 new lines. The collected data have enabled the characterisation of a set of spectroscopic parameters up to decic centrifugal distortion constants. The catalogue generated from the improved spectral data has been used for the search of $Z$-apn in the spectral survey of the G+0.693-0.027 molecular cloud located in the central molecular zone, in the proximity of the Galactic centre.

References in corpus (23)

• Discovery of the Interstellar Chiral Molecule Propylene Oxide (CH${}_3$CHCH${}_2$O)
• The cometary composition of a protoplanetary disk as revealed by complex cyanides
• The largest oxigen bearing organic molecule repository
• Tracing shocks and photodissociation in the Galactic center region
• Discovery in space of ethanolamine, the simplest phospholipid head group
• Detection of E-cyanomethanimine towards Sagittarius B2(N) in the Green Bank Telescope PRIMOS Survey
• Thiols in the ISM: first detection of HC(O)SH and confirmation of C${}_2$H${}_5$SH
• ALMA and ROSINA detections of phosphorus-bearing molecules: the interstellar thread between star-forming regions and comets
• Prebiotic precursors of the primordial RNA world in space: Detection of NH${}_2$OH
• Cloud-cloud collision as drivers of the chemical complexity in Galactic Centre molecular clouds
• First detection of the pre-biotic molecule glycolonitrile (HOCH2CN) in the interstellar medium
• Precursors of fatty alcohols in the ISM: Discovery of n-propanol
• Propargylimine in the laboratory and in space: millimetre-wave spectroscopy and first detection in the ISM
• Interstellar Detection of 2-Cyanocyclopentadiene, C${}_5$H${}_5$CN, a Second Five-Membered Ring Toward TMC-1
• Probing the chemical complexity of amines in the ISM: detection of vinylamine (C${}_2$H${}_3$NH${}_2$) and tentative detection of ethylamine (C${}_2$H${}_5$NH${}_2$)
• The sulphur saga in TMC-1: Discovery of HCSCN and HCSCCH
• First detection of C${}_2$H${}_5$NCO in the ISM and search of other isocyanates towards the G+0.693-0.027 molecular cloud
• Detection of the cyanomidyl radical (HNCN): a new interstellar species with the NCN backbone
• Towards RNA life on Early Earth: From atmospheric HCN to biomolecule production in warm little ponds
• Magnesium radicals MgC${}_5$N and MgC${}_6$H in IRC+10216
• The origin of the E/Z isomer ratio of imines in the interstellar medium
• Discovery of interstellar 3-cyano propargyl radical, CH2CCCN
• Discovery of Interstellar trans-cyanovinylacetylene (HCCCH=CHCN) and vinylcyanoacetylene (H${}_2$C=CHC${}_3$N) in GOTHAM Observations of TMC-1