Universität zu Köln

Markus, Charles R., Thorwirth, Sven, Asvany, Oskar and Schlemmer, Stephan ORCID: 0000-0002-1421-7281 (2019). High-resolution double resonance action spectroscopy in ion traps: vibrational and rotational fingerprints of CH2NH2+. Phys. Chem. Chem. Phys., 21 (48). S. 26406 - 26413. CAMBRIDGE: ROYAL SOC CHEMISTRY. ISSN 1463-9084

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Abstract

By applying various action spectroscopic techniques in a 4 K cryogenic ion trap instrument, protonated methanimine, CH2NH2+, has been investigated by high-resolution rovibrational and pure rotational spectroscopy for the first time. In total, 39 rovibrational transitions within the fundamental band of the nu(2) symmetric C-H stretch were measured around 3026 cm(-1), which were used to predict pure rotational transition frequencies of CH2NH2+ in the ground vibrational state. Based on these predictions, nine rotational transitions were observed between 109 and 283 GHz using a novel double resonance method, which significantly improved the sensitivity of the rotational measurements. This double resonance method consists of rotational excitation followed by vibrational excitation, which is finally detected as a dip in the number of CH2NH2+-He complexes formed in the 4 K He bath of the trap. The new measurements and the derived predictions of pure rotational transitions will enable the first radio-astronomical search for CH2NH2+.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Markus, Charles R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Thorwirth, Sven UNSPECIFIED UNSPECIFIED UNSPECIFIED Asvany, Oskar UNSPECIFIED UNSPECIFIED UNSPECIFIED Schlemmer, Stephan UNSPECIFIED orcid.org/0000-0002-1421-7281 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-123844
DOI:	10.1039/c9cp05487a
Journal or Publication Title:	Phys. Chem. Chem. Phys.
Volume:	21
Number:	48
Page Range:	S. 26406 - 26413
Date:	2019
Publisher:	ROYAL SOC CHEMISTRY
Place of Publication:	CAMBRIDGE
ISSN:	1463-9084
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Physics > Institute of Physics I
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language BASIS-SETS; MANY-BODY; ATOMS; CCSD(T); METHYLENIMINE; PERTURBATION; TRANSITIONS; DERIVATIVES; METHANIMINE; DISCOVERY Multiple languages Chemistry, Physical; Physics, Atomic, Molecular & Chemical Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/12384