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000457273 0247_ $$2doi$$a10.1016/j.jms.2021.111452
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000457273 1001_ $$0P:(DE-H253)PIP1027609$$aArenas, Benjamin$$b0$$udesy
000457273 245__ $$aRotational spectroscopy of imidazole: Accurate spectroscopic information for three vibrationally excited states and the heavy-atom isotopologues up to 295 GHz
000457273 260__ $$aOrlando, Fla.$$bAcademic Press$$c2021
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000457273 520__ $$aWe report our analysis of the pure rotational spectra of low-lying vibrationally excited states and heavy-atom rare isotopologues of imidazole. To facilitate searches for imidazole in the interstellar medium, we previously described the analysis of the rotational spectrum of the imidazole main isotopologue across the 2–295 GHz range, and we extend this analysis here. Structure optimisation and anharmonic frequency calculations were performed to aid the spectral analysis. Three vibrationally excited states of imidazole were assigned in our room-temperature spectra, with energies up to approximately 670 cm$^{−1}$ above the vibronic ground state. The vibrational states could act as temperature probes in warmer star-forming regions. The $^{13}$C and $^{15}$N heavy-atom isotopologues were assigned, which allowed for the structure of imidazole in the gas phase to be determined. Structural comparisons are drawn between the related heterocyclic molecules hydantoin and imidazolidine. An experimental gas-phase structure of the former is also determined in this work. The potential detection of the isotopologues could help deduce formation pathways towards imidazole and other nitrogen-containing cyclic compounds in interstellar space.
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000457273 536__ $$0G:(EU-Grant)638027$$aASTROROT - Unraveling interstellar chemistry with broadband microwave spectroscopy and next-generation telescope arrays (638027)$$c638027$$fERC-2014-STG$$x1
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000457273 7001_ $$0P:(DE-H253)PIP1089725$$aBatra, Gayatri$$b1$$udesy
000457273 7001_ $$0P:(DE-H253)PIP1023834$$aSteber, Amanda$$b2$$udesy
000457273 7001_ $$0P:(DE-HGF)0$$aBizzocchi, Luca$$b3
000457273 7001_ $$0P:(DE-HGF)0$$aPietropolli Charmet, Andrea$$b4
000457273 7001_ $$0P:(DE-HGF)0$$aGiuliano, Barbara M.$$b5
000457273 7001_ $$0P:(DE-HGF)0$$aCaselli, Paola$$b6
000457273 7001_ $$0P:(DE-HGF)0$$aHarris, Brent J.$$b7
000457273 7001_ $$0P:(DE-HGF)0$$aPate, Brooks H.$$b8
000457273 7001_ $$0P:(DE-HGF)0$$aGuillemin, Jean-Claude$$b9
000457273 7001_ $$0P:(DE-H253)PIP1013514$$aSchnell, Melanie$$b10$$eCorresponding author$$udesy
000457273 773__ $$0PERI:(DE-600)1469771-3$$a10.1016/j.jms.2021.111452$$gVol. 378, p. 111452 -$$p111452$$tJournal of molecular spectroscopy$$v378$$x0022-2852$$y2021
000457273 8564_ $$uhttps://bib-pubdb1.desy.de/record/457273/files/Imidazole_2_Accepted_Version.pdf$$yPublished on 2021-04-20. Available in OpenAccess from 2022-04-20.
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