Universität zu Köln

Zingsheim, O., Massen, J., Mueller, H. S. P., Heyne, B., Fatima, M., Bonah, L., Belloche, A., Lewen, F. and Schlemmer, S. (2022). Rotational spectroscopy of n-propanol: Aa and Ag conformers. Astron. Astrophys., 662. LES ULIS CEDEX A: EDP SCIENCES S A. ISSN 1432-0746

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Abstract

Context. The primary alcohol n-propanol (i.e., normal-propanol or propan-1-ol; C3H7OH) occurs in five different conformers: Ga, Gg, Gg', Aa, and Ag. All rotational spectra of the three conformers of the G family are well described, making astronomical search of their spectroscopic signatures possible, as opposed to those of the Aa and Ag conformers. Aims. Our goal is to facilitate the astronomical detection of Aa and Ag conformers of n-propanol by characterizing their rotational spectra. Methods. We recorded the rotational spectra of n-propanol in the frequency domain of 18-505 GHz. Additional double-modulation double-resonance (DM-DR) measurements were performed, more specifically with the goal to unambiguously assign weak transitions of the Aa conformer and to verify assignments of the Ag conformer. Results. We derived a spectroscopic quantum mechanical model with experimental accuracy (with J(max) = 70 and K-a,K-max = 6) for Aa n-propanol. Furthermore, we unambiguously assigned transitions (with J(max) = 69 and K-a;max = 9) of Ag n-propanol; in doing so, we prove the existence of two tunneling states, Ag+ and Ag-. Conclusions. The astronomical search of all five conformers of n-propanol is now possible via their rotational signatures. These are applied in a companion article on the detection of n-propanol toward the hot molecular core Sgr B2(N2).

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Zingsheim, O. UNSPECIFIED UNSPECIFIED UNSPECIFIED Massen, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mueller, H. S. P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Heyne, B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Fatima, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bonah, L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Belloche, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Lewen, F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schlemmer, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-666982
DOI:	10.1051/0004-6361/202243571
Journal or Publication Title:	Astron. Astrophys.
Volume:	662
Date:	2022
Publisher:	EDP SCIENCES S A
Place of Publication:	LES ULIS CEDEX A
ISSN:	1432-0746
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language SUBMILLIMETER-WAVE SPECTROSCOPY; MILLIMETER-WAVE; MOLECULAR-SPECTROSCOPY; COLOGNE DATABASE; SPECTRUM; ALMA; ALCOHOL Multiple languages Astronomy & Astrophysics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/66698