1
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Melosso M, Alessandrini S, Spada L, Melli A, Wang X, Zheng Y, Duan C, Li J, Du W, Gou Q, Bizzocchi L, Dore L, Barone V, Puzzarini C. Rotational spectra and semi-experimental structures of furonitrile and its water cluster. Phys Chem Chem Phys 2023; 25:31281-31291. [PMID: 37955344 DOI: 10.1039/d3cp03984f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2023]
Abstract
Rotational spectroscopy represents an invaluable tool for several applications: from the identification of new molecules in interstellar objects to the characterization of van der Waals complexes, but also for the determination of very accurate molecular structures and for conformational analyses. In this work, we used high-resolution rotational spectroscopic techniques in combination with high-level quantum-chemical calculations to address all these aspects for two isomers of cyanofuran, namely 2-furonitrile and 3-furonitrile. In particular, we have recorded and analyzed the rotational spectra of both of them from 6 to 320 GHz; rotational transitions belonging to several singly-substituted isotopologues have been identified as well. The rotational constants derived in this way have been used in conjunction with computed rotation-vibration interaction constants in order to derive a semi-experimental equilibrium structure for both isomers. Moreover, we observed the rotational spectra of four different intermolecular adducts formed by furonitrile and water, whose identification has been supported by a conformational analysis and a theoretical spectroscopic characterization. A semi-experimental determination of the intermolecular parameters has been achieved for all of them and the results have been compared with those obtained for the analogous system formed by benzonitrile and water.
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Affiliation(s)
- Mattia Melosso
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy.
| | - Silvia Alessandrini
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy.
| | - Lorenzo Spada
- Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy
| | - Alessio Melli
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy.
- Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy
| | - Xiujuan Wang
- Department of Chemistry, School of Chemistry and Chemical Engineering, Chongqing University, Daxuecheng South Rd. 55, 401331, Chongqing, China.
| | - Yang Zheng
- Department of Chemistry, School of Chemistry and Chemical Engineering, Chongqing University, Daxuecheng South Rd. 55, 401331, Chongqing, China.
| | - Chunguo Duan
- Department of Chemistry, School of Chemistry and Chemical Engineering, Chongqing University, Daxuecheng South Rd. 55, 401331, Chongqing, China.
| | - Jiayi Li
- Department of Chemistry, School of Chemistry and Chemical Engineering, Chongqing University, Daxuecheng South Rd. 55, 401331, Chongqing, China.
| | - Weiping Du
- Department of Chemistry, School of Chemistry and Chemical Engineering, Chongqing University, Daxuecheng South Rd. 55, 401331, Chongqing, China.
| | - Qian Gou
- Department of Chemistry, School of Chemistry and Chemical Engineering, Chongqing University, Daxuecheng South Rd. 55, 401331, Chongqing, China.
| | - Luca Bizzocchi
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy.
| | - Luca Dore
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy.
| | - Vincenzo Barone
- Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy
| | - Cristina Puzzarini
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy.
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2
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Puzzarini C, Alessandrini S, Bizzocchi L, Melosso M. Hunting for interstellar molecules: rotational spectra of reactive species. Faraday Discuss 2023; 245:309-326. [PMID: 37318358 DOI: 10.1039/d3fd00052d] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/21/2023]
Abstract
Interstellar molecules are often highly reactive species, which are unstable under terrestrial conditions, such as radicals, ions and unsaturated carbon chains. Their detection in space is usually based on the astronomical observation of their rotational fingerprints. However, laboratory investigations have to face the issue of efficiently producing these molecules and preserving them during rotational spectroscopy measurements. A general approach for producing and investigating unstable/reactive species is presented by means of selected case-study molecules. The overall strategy starts from quantum-chemical calculations that aim at obtaining accurate predictions of the missing spectroscopic information required to guide spectral analysis and assignment. Rotational spectra of these species are then recorded by exploiting the approach mentioned above, and their subsequent analysis leads to accurate spectroscopic parameters. These are then used for setting up accurate line catalogs for astronomical searches.
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Affiliation(s)
- Cristina Puzzarini
- ROT&Comp Lab, Department of Chemistry "Giacomo Ciamician", University of Bologna, Via F. Selmi 2, I-40126 Bologna, Italy.
| | - Silvia Alessandrini
- ROT&Comp Lab, Department of Chemistry "Giacomo Ciamician", University of Bologna, Via F. Selmi 2, I-40126 Bologna, Italy.
| | - Luca Bizzocchi
- ROT&Comp Lab, Department of Chemistry "Giacomo Ciamician", University of Bologna, Via F. Selmi 2, I-40126 Bologna, Italy.
| | - Mattia Melosso
- ROT&Comp Lab, Department of Chemistry "Giacomo Ciamician", University of Bologna, Via F. Selmi 2, I-40126 Bologna, Italy.
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3
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Alessandrini S, Melosso M, Rivilla VM, Bizzocchi L, Puzzarini C. Computational Protocol for the Identification of Candidates for Radioastronomical Detection and Its Application to the C3H3NO Family of Isomers. Molecules 2023; 28:molecules28073226. [PMID: 37049990 PMCID: PMC10096335 DOI: 10.3390/molecules28073226] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2023] [Revised: 03/30/2023] [Accepted: 03/31/2023] [Indexed: 04/08/2023] Open
Abstract
The C3H3NO family of isomers is relevant in astrochemistry, even though its members are still elusive in the interstellar medium. To identify the best candidate for astronomical detection within this family, we developed a new computational protocol based on the minimum-energy principle. This approach aims to identify the most stable isomer of the family and consists of three steps. The first step is an extensive investigation that characterizes the vast number of compounds having the C3H3NO chemical formula, employing density functional theory for this purpose. The second step is an energy refinement, which is used to select isomers and relies on coupled cluster theory. The last step is a structural improvement with a final energy refinement that provides improved energies and a large set of accurate spectroscopic parameters for all isomers lying within 30 kJ mol−1 above the most stable one. According to this protocol, vinylisocyanate is the most stable isomer, followed by oxazole, which is about 5 kJ mol−1 higher in energy. The other stable species are pyruvonitrile, cyanoacetaldehyde, and cyanovinylalcohol. For all of these species, new computed rotational and vibrational spectroscopic data are reported, which complement those already available in the literature or fill current gaps.
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Affiliation(s)
- Silvia Alessandrini
- Dipartimento di Chimica “Giacomo Ciamician”, Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy
| | - Mattia Melosso
- Dipartimento di Chimica “Giacomo Ciamician”, Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy
| | - Víctor M. Rivilla
- Centro de Astrobiología (CSIC-INTA), Ctra. de Ajalvir km. 4, Torrejón de Ardoz, 28850 Madrid, Spain
| | - Luca Bizzocchi
- Dipartimento di Chimica “Giacomo Ciamician”, Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy
| | - Cristina Puzzarini
- Dipartimento di Chimica “Giacomo Ciamician”, Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy
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Jiang N, Melosso M, Alessandrini S, Bizzocchi L, Martin-Drumel MA, Pirali O, Puzzarini C. Insights into the molecular structure and infrared spectrum of the prebiotic species aminoacetonitrile. Phys Chem Chem Phys 2023; 25:4754-4763. [PMID: 36691972 DOI: 10.1039/d2cp05179f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Aminoacetonitrile is an interstellar molecule with a prominent prebiotic role, already detected in the chemically-rich molecular cloud Sagittarius B2(N) and postulated to be present in the atmosphere of the largest Saturn's moon, Titan. To further support its observation in such remote environments and laboratory experiments aimed at improving our understanding of interstellar chemistry, we report a thorough spectroscopic and structural characterization of aminoacetonitrile. Equilibrium geometry, fundamental bands as well as spectroscopic and molecular parameters have been accurately computed by exploiting a composite scheme rooted in the coupled-cluster theory that accounts for the extrapolation to the complete basis set limit and core-correlation effects. In addition, a semi-experimental approach that combines ground-state rotational constants for different isotopic species and calculated vibrational corrections has been employed for the structure determination. From the experimental side, we report the analysis of the three strongest fundamental bands of aminoacetonitrile observed between 500 and 1000 cm-1 in high-resolution infrared spectra. More generally, all computed band positions are in excellent agreement with the present and previous experiments. The only exception is the ν15 band, for which we provide a revision of the experimental assignment, now in good agreement with theory.
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Affiliation(s)
- Ningjing Jiang
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy.
| | - Mattia Melosso
- Scuola Superiore Meridionale, Largo San Marcellino 10, 80138 Naples, Italy.
| | - Silvia Alessandrini
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy. .,Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy
| | - Luca Bizzocchi
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy.
| | | | - Olivier Pirali
- Université Paris-Saclay, CNRS, Institut des Sciences Moléculaires d'Orsay, 91405 Orsay, France.,SOLEIL Synchrotron, AILES beamline, l'Orme des Merisiers, 91190 Saint-Aubin, Gif-sur-Yvette, France
| | - Cristina Puzzarini
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy.
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5
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Melli A, Melosso M, Bizzocchi L, Alessandrini S, Jiang N, Tonolo F, Boi S, Castellan G, Sapienza C, Guillemin JC, Dore L, Puzzarini C. Rotational Spectra of Unsaturated Carbon Chains Produced by Pyrolysis: The Case of Propadienone, Cyanovinylacetylene, and Allenylacetylene. J Phys Chem A 2022; 126:6210-6220. [PMID: 36044202 PMCID: PMC9483987 DOI: 10.1021/acs.jpca.2c05018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
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Several interstellar molecules are highly reactive unsaturated
carbon chains, which are unstable under terrestrial conditions. Laboratory
studies in support of their detection in space thus face the issue
of how to produce these species and how to correctly model their rotational
energy levels. In this work, we introduce a general approach for producing
and investigating unsaturated carbon chains by means of selected test
cases. We report a comprehensive theoretical/experimental spectroscopic
characterization of three species, namely, propadienone, cyanovinylacetylene,
and allenylacetylene, all of them being produced by means of flash
vacuum pyrolysis of a suitable precursor. For each species, quantum-chemical
calculations have been carried out with the aim of obtaining accurate
predictions of the missing spectroscopic information required to guide
spectral analysis and assignment. Rotational spectra of the title
molecules have been investigated up to 400 GHz by using a frequency-modulation
millimeter-/submillimeter-wave spectrometer, thus significantly extending
spectral predictions over a wide range of frequency and quantum numbers.
A comparison between our results and those available in the literature
points out the clear need of the reported laboratory measurements
at higher frequencies for setting up accurate line catalogs for astronomical
searches.
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Affiliation(s)
- Alessio Melli
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy.,Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy
| | - Mattia Melosso
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy.,Scuola Superiore Meridionale, Largo San Marcellino 10, 80138 Naples, Italy
| | - Luca Bizzocchi
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy
| | - Silvia Alessandrini
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy.,Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy
| | - Ningjing Jiang
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy
| | - Francesca Tonolo
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy.,Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy
| | - Salvatore Boi
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy
| | - Giorgia Castellan
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy
| | - Carlotta Sapienza
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy
| | - Jean-Claude Guillemin
- Univ Rennes, Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR-UMR6226, F-35000 Rennes, France
| | - Luca Dore
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy
| | - Cristina Puzzarini
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy
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Bizzocchi L, Alessandrini S, Melosso M, Puzzarini C. Dipolar spin-spin coupling as an auxiliary tool for the structure determination of small isolated molecules. Phys Chem Chem Phys 2022; 24:15173-15181. [PMID: 35703976 DOI: 10.1039/d2cp01124g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The "gold standard" for obtaining accurate equilibrium structures is the so-called semi-experimental (SE) approach, which exploits the structural information contained in rotational constants. Within the SE approach, ground-state rotational constants-accurately obtained from high-resolution spectroscopic studies-are computationally corrected in order to remove vibrational effects. The resulting SE equilibrium rotational constants for a significant set of isotopic species allow for retrieving a unique set of equilibrium bond lengths and angles for the molecule under consideration. However, in some cases, the lack of isotopic substitution hampers or even prevents a rigorous and complete structure determination. In this perspective, we introduce the use of dipolar spin-spin coupling constants as an additional source of structural information in support of the standard SE approach. As a proof-of-concept, we tested this new strategy on some prototypical species, such as water, ammonia, phosphine, and their fluorinated counterparts. Our results indicate that-even when the molecular structure can be obtained from a large set of isotopic rotational constants-the use of dipolar spin-spin coupling constants guarantees a better accuracy and reduces the correlations among the geometrical parameters. Moreover, we point out that our approach offers the possibility to fully derive the molecular structure of PF3, a species for which any isotopic substitution is not possible.
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Affiliation(s)
- Luca Bizzocchi
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, via F. Selmi 2, 40126 Bologna, Italy.
| | - Silvia Alessandrini
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, via F. Selmi 2, 40126 Bologna, Italy. .,Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy.
| | - Mattia Melosso
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, via F. Selmi 2, 40126 Bologna, Italy. .,Scuola Superiore Meridionale, Università di Napoli Federico II, Largo San Marcellino 10, 80138 Naples, Italy.
| | - Cristina Puzzarini
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, via F. Selmi 2, 40126 Bologna, Italy.
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Melli A, Melosso M, Lengsfeld KG, Bizzocchi L, Rivilla VM, Dore L, Barone V, Grabow JU, Puzzarini C. Spectroscopic Characterization of 3-Aminoisoxazole, a Prebiotic Precursor of Ribonucleotides. Molecules 2022; 27:molecules27103278. [PMID: 35630755 PMCID: PMC9147597 DOI: 10.3390/molecules27103278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 05/16/2022] [Accepted: 05/18/2022] [Indexed: 11/17/2022]
Abstract
The processes and reactions that led to the formation of the first biomolecules on Earth play a key role in the highly debated theme of the origin of life. Whether the first chemical building blocks were generated on Earth (endogenous synthesis) or brought from space (exogenous delivery) is still unanswered. The detection of complex organic molecules in the interstellar medium provides valuable support to the latter hypothesis. To gather more insight, here we provide the astronomers with accurate rotational frequencies to guide the interstellar search of 3-aminoisoxazole, which has been recently envisaged as a key reactive species in the scenario of the so-called RNA-world hypothesis. Relying on an accurate computational characterization, we were able to register and analyze the rotational spectrum of 3-aminoisoxazole in the 6–24 GHz and 80–320 GHz frequency ranges for the first time, exploiting a Fourier-transform microwave spectrometer and a frequency-modulated millimeter/sub-millimeter spectrometer, respectively. Due to the inversion motion of the −NH2 group, two states arise, and both of them were characterized, with more than 1300 lines being assigned. Although the fit statistics were affected by an evident Coriolis interaction, we were able to produce accurate line catalogs for astronomical observations of 3-aminoisoxazole.
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Affiliation(s)
- Alessio Melli
- Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy; (A.M.); (V.B.)
- Dipartimento di Chimica “Giacomo Ciamician”, Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy; (L.B.); (L.D.)
| | - Mattia Melosso
- Scuola Superiore Meridionale, Università di Napoli Federico II, Largo San Marcellino 10, 80138 Naples, Italy
- Correspondence: (M.M.); (C.P.)
| | - Kevin G. Lengsfeld
- Institut für Physikalische Chemie und Elektrochemie, Gottfried Wilhelm Leibniz Universität Hannover, Callinstraße 3A, 30167 Hannover, Germany; (K.G.L.); (J.-U.G.)
| | - Luca Bizzocchi
- Dipartimento di Chimica “Giacomo Ciamician”, Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy; (L.B.); (L.D.)
| | - Víctor M. Rivilla
- Centro de Astrobiología (CSIC-INTA), Ctra. de Ajalvir Km. 4, Torrejón de Ardoz, 28850 Madrid, Spain;
| | - Luca Dore
- Dipartimento di Chimica “Giacomo Ciamician”, Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy; (L.B.); (L.D.)
| | - Vincenzo Barone
- Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy; (A.M.); (V.B.)
| | - Jens-Uwe Grabow
- Institut für Physikalische Chemie und Elektrochemie, Gottfried Wilhelm Leibniz Universität Hannover, Callinstraße 3A, 30167 Hannover, Germany; (K.G.L.); (J.-U.G.)
| | - Cristina Puzzarini
- Dipartimento di Chimica “Giacomo Ciamician”, Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy; (L.B.); (L.D.)
- Correspondence: (M.M.); (C.P.)
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Dore L, Bizzocchi L, Lattanzi V, Melosso M, Tamassia F, McCarthy MC. First Laboratory Detection of N 13CO - and Semiexperimental Equilibrium Structure of the NCO - Anion. J Phys Chem A 2022; 126:1899-1904. [PMID: 35285635 PMCID: PMC8958587 DOI: 10.1021/acs.jpca.2c00313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
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The cyanate anion
(NCO–) is a species of considerable
astrophysical relevance. It is widely believed to be embedded in interstellar
ices present in young stellar objects but has not yet been detected
in the dense gas of the interstellar medium. Here we report highly
accurate laboratory measurements of the rotational spectrum of the
N13CO– isotopologue at submillimeter
wavelengths along with the detection of three additional lines of
the parent isotopologue up to 437.4 GHz. With this new data, the rotational
spectrum of both isotopologues can be predicted to better 0.25 km
s–1 in equivalent radial velocity up to 1 THz, more
than adequate for an astronomical search in any source. Moreover,
a semiexperimental equilibrium structure of the anion is derived by
combining the experimental ground-state rotational constants of the
two isotopologues with theoretical vibrational corrections, obtained
by using the coupled-cluster method with inclusion of single and double
excitations and perturbative inclusion of triple excitations (CCSD(T)).
The estimated accuracy of the two bond distances is on the order of
5 × 10–4 Å: a comparison to the values
obtained by geometry optimization with the CCSD(T) method and the
use of a composite scheme, including additivity and basis-set extrapolation
techniques, reveals that this theoretical procedure is very accurate.
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Affiliation(s)
- Luca Dore
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via Selmi 2, I-40126 Bologna, Italy
| | - Luca Bizzocchi
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via Selmi 2, I-40126 Bologna, Italy
| | - Valerio Lattanzi
- Center for Astrochemical Studies, Max Planck Institut für Extraterrestrische Physik Gießenbachstraße 1, D-85748 Garching bei München, Germany
| | - Mattia Melosso
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via Selmi 2, I-40126 Bologna, Italy.,Scuola Superiore Meridionale, Università di Napoli Federico II, Largo San Marcellino 10, I-80138 Naples, Italy
| | - Filippo Tamassia
- Dipartimento di Chimica Industriale "Toso Montanari", Università di Bologna, Viale Risorgimento 4, I-40136 Bologna, Italy
| | - Michael C McCarthy
- Center for Astrophysics
- Harvard & Smithsonian, 60 Garden St., Cambridge, Massachusetts 02138, United States
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Jiang N, Melosso M, Bizzocchi L, Alessandrini S, Guillemin JC, Dore L, Puzzarini C. Spectroscopic and Computational Characterization of 2-Aza-1,3-butadiene, a Molecule of Astrochemical Significance. J Phys Chem A 2022; 126:1881-1888. [PMID: 35275628 PMCID: PMC8958585 DOI: 10.1021/acs.jpca.2c00831] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
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Being N-substituted
unsaturated species, azabutadienes are molecules
of potential relevance in astrochemistry, ranging from the interstellar
medium to Titan’s atmosphere. 2-Azabutadiene and butadiene
share a similar conjugated π system, thus allowing investigation
of the effects of heteroatom substitution. More interestingly, 2-azabutadiene
can be used to proxy the abundance of interstellar butadiene. To enable
future astronomical searches, the rotational spectrum of 2-azabutadiene
has been investigated up to 330 GHz. The experimental work has been
supported and guided by accurate computational characterization of
the molecular structure, energetics, and spectroscopic properties
of the two possible forms, trans and gauche. The trans species, more stable by about 7 kJ/mol
than gauche-2-azabutadiene, has been experimentally
observed, and its rotational and centrifugal distortion constants
have been obtained with remarkable accuracy, while theoretical estimates
of the spectroscopic parameters are reported for gauche-2-azabutadiene.
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Affiliation(s)
- Ningjing Jiang
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy
| | - Mattia Melosso
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy.,Scuola Superiore Meridionale, Università di Napoli Federico II, Largo San Marcellino 10, 80138 Naples, Italy
| | - Luca Bizzocchi
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy
| | | | - Jean-Claude Guillemin
- University of Rennes, Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR-UMR6226, F-35000 Rennes, France
| | - Luca Dore
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy
| | - Cristina Puzzarini
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy
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10
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Melosso M, Bizzocchi L, Gazzeh H, Tonolo F, Guillemin JC, Alessandrini S, Rivilla VM, Dore L, Barone V, Puzzarini C. Gas-phase identification of ( Z)-1,2-ethenediol, a key prebiotic intermediate in the formose reaction. Chem Commun (Camb) 2022; 58:2750-2753. [PMID: 35119446 DOI: 10.1039/d1cc06919e] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Prebiotic sugars are thought to be formed on primitive Earth by the formose reaction. However, their formation is not fully understood and it is plausible that key intermediates could have formed in extraterrestrial environments and subsequently delivered on early Earth by cometary bodies. 1,2-Ethenediol, the enol form of glycolaldehyde, represents a highly reactive intermediate of the formose reaction and is likely detectable in the interstellar medium. Here, we report the identification and first characterization of (Z)-1,2-ethenediol by means of rotational spectroscopy. The title compound has been produced in the gas phase by flash vacuum pyrolysis of bis-exo-5-norbornene-2,3-diol at 750 °C, through a retro-Diels-Alder reaction. The spectral analysis was guided by high-level quantum-chemical calculations, which predicted spectroscopic parameters in very good agreement with the experiment. Our study provides accurate spectral data to be used for searches of (Z)-1,2-ethenediol in the interstellar space.
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Affiliation(s)
- Mattia Melosso
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy. .,Scuola Superiore Meridionale, Università di Napoli Federico II, Largo San Marcellino 10, 80138 Naples, Italy
| | - Luca Bizzocchi
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy. .,Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy
| | - Houda Gazzeh
- Univ Rennes, Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR - UMR6226, F-35000 Rennes, France.,Université de Monastir, Avenue Taher Hadded B. P 56, Monastir 5000, Tunisia
| | - Francesca Tonolo
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy. .,Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy
| | - Jean-Claude Guillemin
- Univ Rennes, Ecole Nationale Supérieure de Chimie de Rennes, CNRS, ISCR - UMR6226, F-35000 Rennes, France
| | - Silvia Alessandrini
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy. .,Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy
| | - Víctor M Rivilla
- Centro de Astrobiología (CSIC-INTA), Ctra. de Ajalvir Km. 4, Torrejón de Ardoz, 28850 Madrid, Spain.,INAF - Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, 50125 Florence, Italy
| | - Luca Dore
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy.
| | - Vincenzo Barone
- Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy
| | - Cristina Puzzarini
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy.
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11
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Bizzocchi L, Alessandrini S, Melosso M, Rivilla VM, Puzzarini C. Ab Initio Study of Fine and Hyperfine Interactions in Triplet POH. Molecules 2022; 27:302. [PMID: 35011533 PMCID: PMC8746536 DOI: 10.3390/molecules27010302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 12/28/2021] [Accepted: 12/30/2021] [Indexed: 11/16/2022] Open
Abstract
Phosphorous-containing molecules have a great relevance in prebiotic chemistry in view of the fact that phosphorous is a fundamental constituent of biomolecules, such as RNA, DNA, and ATP. Its biogenic importance has led astrochemists to investigate the possibility that P-bearing species could have formed in the interstellar medium (ISM) and subsequently been delivered to early Earth by rocky bodies. However, only two P-bearing molecules have been detected so far in the ISM, with the chemistry of interstellar phosphorous remaining poorly understood. Here, in order to shed further light on P-carriers in space, we report a theoretical spectroscopic characterisation of the rotational spectrum of POH in its 3A″ ground electronic state. State-of-the-art coupled-cluster schemes have been employed to derive rotational constants, centrifugal distortion terms, and most of the fine and hyperfine interaction parameters, while the electron spin-spin dipolar coupling has been investigated using the multi-configuration self-consistent-field method. The computed spectroscopic parameters have been used to simulate the appearance of triplet POH rotational and ro-vibrational spectra in different conditions, from cold to warm environments, either in gas-phase experiments or in molecular clouds. Finally, we point out that the predicted hyperfine structures represent a key pattern for the recognition of POH in laboratory and interstellar spectra.
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Affiliation(s)
- Luca Bizzocchi
- Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy; (L.B.); (S.A.)
- Dipartimento di Chimica “Giacomo Ciamician”, Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy;
| | - Silvia Alessandrini
- Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy; (L.B.); (S.A.)
- Dipartimento di Chimica “Giacomo Ciamician”, Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy;
| | - Mattia Melosso
- Dipartimento di Chimica “Giacomo Ciamician”, Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy;
- Scuola Superiore Meridionale, Università di Napoli Federico II, Largo San Marcellino 10, 80138 Naples, Italy
| | - Víctor M. Rivilla
- Centro de Astrobiología (CSIC-INTA), Ctra. de Ajalvir Km. 4, Torrejón de Ardoz, 28850 Madrid, Spain;
- INAF—Osservatorio Astrofisico di Arcetri, Largo E. Fermi 5, 50125 Florence, Italy
| | - Cristina Puzzarini
- Dipartimento di Chimica “Giacomo Ciamician”, Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy;
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12
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Tonolo F, Bizzocchi L, Melosso M, Lique F, Dore L, Barone V, Puzzarini C. An improved study of HCO + and He system: Interaction potential, collisional relaxation, and pressure broadening. J Chem Phys 2021; 155:234306. [PMID: 34937352 DOI: 10.1063/5.0075929] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
In light of its ubiquitous presence in the interstellar gas, the chemistry and reactivity of the HCO+ ion requires special attention. The availability of up-to-date collisional data between this ion and the most abundant perturbing species in the interstellar medium is a critical resource in order to derive reliable values of its molecular abundance from astronomical observations. This work intends to provide improved scattering parameters for the HCO+ and He collisional system. We have tested the accuracy of explicitly correlated coupled-cluster methods for mapping the short- and long-range multi-dimensional potential energy surface of atom-ion systems. A validation of the methodology employed for the calculation of the potential well has been obtained from the comparison with experimentally derived bound-state spectroscopic parameters. Finally, by solving the close-coupling scattering equations, we have derived the pressure broadening and shift coefficients for the first six rotational transitions of HCO+ as well as inelastic state-to-state transition rates up to j = 5 in the 5-100 K temperature interval.
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Affiliation(s)
- F Tonolo
- Scuola Normale Superiore, Piazza dei Cavalieri 7, I-56126 Pisa, Italy
| | - L Bizzocchi
- Scuola Normale Superiore, Piazza dei Cavalieri 7, I-56126 Pisa, Italy
| | - M Melosso
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via F. Selmi 2, I-40126 Bologna, Italy
| | - F Lique
- Univ. Rennes, CNRS, IPR (Institut de Physique de Rennes)-UMR 6251, F-35000 Rennes, France
| | - L Dore
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via F. Selmi 2, I-40126 Bologna, Italy
| | - V Barone
- Scuola Normale Superiore, Piazza dei Cavalieri 7, I-56126 Pisa, Italy
| | - C Puzzarini
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via F. Selmi 2, I-40126 Bologna, Italy
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13
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Alessandrini S, Melosso M, Jiang N, Bizzocchi L, Dore L, Puzzarini C. Conformational stability of cyclopropanecarboxaldehyde is ruled by vibrational effects. Mol Phys 2021. [DOI: 10.1080/00268976.2021.1955988] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Silvia Alessandrini
- Scuola Normale Superiore, Pisa, Italy
- Dipartimento di Chimica “Giacomo Ciamician”, Università di Bologna, Bologna, Italy
| | - Mattia Melosso
- Dipartimento di Chimica “Giacomo Ciamician”, Università di Bologna, Bologna, Italy
| | - Ningjing Jiang
- Dipartimento di Chimica “Giacomo Ciamician”, Università di Bologna, Bologna, Italy
| | - Luca Bizzocchi
- Scuola Normale Superiore, Pisa, Italy
- Dipartimento di Chimica “Giacomo Ciamician”, Università di Bologna, Bologna, Italy
| | - Luca Dore
- Dipartimento di Chimica “Giacomo Ciamician”, Università di Bologna, Bologna, Italy
| | - Cristina Puzzarini
- Dipartimento di Chimica “Giacomo Ciamician”, Università di Bologna, Bologna, Italy
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14
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Abstract
![]()
Huge efforts have
recently been taken in the derivation of accurate
compilations of rovibrational energies of water, one of the most important
reference systems in spectroscopy. Such precision is desirable for
all water isotopologues, although their investigation is challenged
by hyperfine effects in their spectra. Frequency-comb locked noise-immune
cavity-enhanced optical-heterodyne molecular spectroscopy (NICE-OHMS)
allows for achieving high sensitivity, resolution, and accuracy. This
technique has been employed to resolve the subtle hyperfine splittings
of rovibrational transitions of H217O in the
near-infrared region. Simulation and interpretation of the H217O saturation spectra have been supported by coupled-cluster
calculations performed with large basis sets and accounting for high-level
corrections. Experimental 17O hyperfine parameters are
found in excellent agreement with the corresponding computed values.
The need of including small hyperfine effects in the analysis of H217O spectra has been demonstrated together with
the ability of the computational strategy employed for providing quantitative
predictions of the corresponding parameters.
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Affiliation(s)
- Mattia Melosso
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via Selmi 2, 40126 Bologna, Italy
| | - Meissa L Diouf
- Department of Physics and Astronomy, LaserLab, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - Luca Bizzocchi
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via Selmi 2, 40126 Bologna, Italy.,Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy
| | - Michael E Harding
- Institut für Nanotechnologie, Karlsruher Institut für Technologie (KIT), Campus Nord, Postfach 3640, 76021 Karlsruhe, Germany
| | - Frank M J Cozijn
- Department of Physics and Astronomy, LaserLab, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
| | - Cristina Puzzarini
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via Selmi 2, 40126 Bologna, Italy
| | - Wim Ubachs
- Department of Physics and Astronomy, LaserLab, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, The Netherlands
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15
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Degli Esposti C, Melosso M, Bizzocchi L, Tamassia F, Dore L. Determination of a semi-experimental equilibrium structure of 1-phosphapropyne from millimeter-wave spectroscopy of CH3CP and CD3CP. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2019.127429] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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16
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Prudenzano D, Lique F, Ramachandran R, Bizzocchi L, Caselli P. Collisional excitation of NH( 3Σ -) by Ar: A new ab initio 3D potential energy surface and scattering calculations. J Chem Phys 2019; 150:214302. [PMID: 31176333 DOI: 10.1063/1.5097651] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Collisional excitation of light hydrides is important to fully understand the complex chemical and physical processes of atmospheric and astrophysical environments. Here, we focus on the NH(X3Σ-)-Ar van der Waals system. First, we have calculated a new three-dimensional Potential Energy Surface (PES), which explicitly includes the NH bond vibration. We have carried out the ab initio calculations of the PES employing the open-shell single- and double-excitation couple cluster method with noniterative perturbational treatment of the triple excitations. To achieve a better accuracy, we have first obtained the energies using the augmented correlation-consistent aug-cc-pVXZ (X = T, Q, 5) basis sets and then we have extrapolated the final values to the complete basis set limit. We have also studied the collisional excitation of NH(X3Σ-)-Ar at the close-coupling level, employing our new PES. We calculated collisional excitation cross sections of the fine-structure levels of NH by Ar for energies up to 3000 cm-1. After thermal average of the cross sections, we have then obtained the rate coefficients for temperatures up to 350 K. The propensity rules between the fine-structure levels are in good agreement with those of similar collisional systems, even though they are not as strong and pronounced as for lighter systems, such as NH-He. The final theoretical values are also compared with the few available experimental data.
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Affiliation(s)
- D Prudenzano
- Center for Astrochemical Studies, Max-Planck-Institut für Extraterrestrische Physik, Gießenbachstraße 1, 85748 Garching, Germany
| | - F Lique
- LOMC-UMR 6294, CNRS-Université du Havre, 25 Rue Philippe Lebon, BP 1123, 76063 Le Havre, France
| | - R Ramachandran
- LOMC-UMR 6294, CNRS-Université du Havre, 25 Rue Philippe Lebon, BP 1123, 76063 Le Havre, France
| | - L Bizzocchi
- Center for Astrochemical Studies, Max-Planck-Institut für Extraterrestrische Physik, Gießenbachstraße 1, 85748 Garching, Germany
| | - P Caselli
- Center for Astrochemical Studies, Max-Planck-Institut für Extraterrestrische Physik, Gießenbachstraße 1, 85748 Garching, Germany
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17
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Melosso M, Bizzocchi L, Tamassia F, Degli Esposti C, Canè E, Dore L. The rotational spectrum of 15ND. Isotopic-independent Dunham-type analysis of the imidogen radical. Phys Chem Chem Phys 2019; 21:3564-3573. [PMID: 30239539 DOI: 10.1039/c8cp04498h] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The rotational spectrum of 15ND in its ground electronic X3Σ- state has been observed for the first time. Forty-three hyperfine-structure components belonging to the ground and ν = 1 vibrational states have been recorded with a frequency-modulation millimeter-/submillimeter-wave spectrometer. These new measurements, together with the ones available for the other isotopologues NH, ND, and 15NH, have been simultaneously analysed using the Dunham model to represent the ro-vibrational, fine, and hyperfine energy contributions. The least-squares fit of more than 1500 transitions yielded an extensive set of isotopically independent Ulm parameters plus 13 Born-Oppenheimer Breakdown coefficients Δlm. As an alternative approach, we performed a Dunham analysis in terms of the most abundant isotopologue coefficients Ylm and some isotopically dependent Born-Oppenheimer Breakdown constants δlm [R. J. Le Roy, J. Mol. Spectrosc., 1999, 194, 189]. The two fits provide results of equivalent quality. The Born-Oppenheimer equilibrium bond distance for the imidogen radical has been calculated [rBOe = 103.606721(13) pm] and zero-point energies have been derived for all the isotopologues.
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Affiliation(s)
- Mattia Melosso
- Dipartimento di Chimica "Giacomo Ciamician", Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy.
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18
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Fontani F, Caselli P, Palau A, Bizzocchi L, Ceccarelli C. FIRST MEASUREMENTS OF
15
N FRACTIONATION IN N
2
H
+
TOWARD HIGH-MASS STAR-FORMING CORES. ACTA ACUST UNITED AC 2015. [DOI: 10.1088/2041-8205/808/2/l46] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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19
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Bizzocchi L, Esposti CD, Dore L, Gauss J, Puzzarini C. The Born–Oppenheimer equilibrium bond distance of GeO from millimetre- and submillimetre-wave spectra and quantum-chemical calculations. Mol Phys 2014. [DOI: 10.1080/00268976.2014.977363] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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20
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Müller HSP, Spezzano S, Bizzocchi L, Gottlieb CA, Degli Esposti C, McCarthy MC. Rotational spectroscopy of isotopologues of silicon monoxide, SiO, and spectroscopic parameters from a combined fit of rotational and rovibrational data. J Phys Chem A 2013; 117:13843-54. [PMID: 24070172 DOI: 10.1021/jp408391f] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Pure rotational transitions of silicon monoxide, involving the main ((28)Si(16)O) as well as several rare isotopic species, were observed in their ground vibrational states by employing long-path absorption spectroscopy between 86 and 825 GHz (1 ≤ J" ≤ 18). Fourier transform microwave spectroscopy was used to study the J" = 0 transition frequencies in the ground and several vibrationally excited states. The vibrational excitation of the newly studied isotopologues extend to between υ = 9 and 29 for (28)Si(17)O and (30)Si(16)O, respectively. Data were extended for some previously investigated species up to υ = 51 for the main isotopologue. The high spectral resolution allowed us to resolve the hyperfine structure in (28)Si(17)O caused by the nuclear electric quadrupole and magnetic dipole moments of (17)O for the first time, and to resolve the much smaller nuclear spin-rotation splitting for isotopic species containing (29)Si. These data were combined with previous rotational and rovibrational (infrared) data to determine an improved set of spectroscopic parameters of SiO in one global fit which takes the breakdown of the Born-Oppenheimer approximation into account. Highly accurate rotational transition frequencies for this important astronomical molecule can now be predicted well into the terahertz region with this parameter set. In addition, a more complete comparison among physical properties of group 14/16 diatomics is possible.
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Affiliation(s)
- Holger S P Müller
- I. Physikalisches Institut, Universität zu Köln , Zülpicher Straβe 77, 50937 Köln, Germany
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21
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Bizzocchi L, Tamassia F, Esposti CD, Dore L, Fusina L, Villa M, Canè E. The high-resolution infrared spectrum of DC4H from 450 to 1100 cm−1: Overtone, combination, and hot bands. J Chem Phys 2013; 139:154308. [DOI: 10.1063/1.4824656] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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22
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23
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24
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Giuliano BM, Bizzocchi L, Sanchez R, Villanueva P, Cortijo V, Sanz ME, Grabow JU. The rotational spectra, potential function, Born–Oppenheimer breakdown, and hyperfine structure of GeSe and GeTe. J Chem Phys 2011; 135:084303. [DOI: 10.1063/1.3624728] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
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25
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26
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27
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Giuliano BM, Bizzocchi L, Cooke S, Banser D, Hess M, Fritzsche J, Grabow JU. Pure rotational spectra of PbSe and PbTe: potential function, Born–Oppenheimer breakdown, field shift effect and magnetic shielding. Phys Chem Chem Phys 2008; 10:2078-88. [DOI: 10.1039/b716896a] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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28
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Bizzocchi L, Degli Esposti C, Dore L. Sub-Doppler millimetre-wave spectroscopy of DBS and HBS: accurate values of nuclear electric and magnetic hyperfine structure constants. Phys Chem Chem Phys 2008; 10:658-65. [DOI: 10.1039/b710356e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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29
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30
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Bizzocchi L, Giuliano BM, Hess M, Grabow JU. The rotational spectra, potential function, Born-Oppenheimer breakdown, and magnetic shielding of SnSe and SnTe. J Chem Phys 2007; 126:114305. [PMID: 17381204 DOI: 10.1063/1.2710266] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
The pure rotational spectra of 27 isotopic species of SnSe and SnTe have been measured in the frequency range of 5-24 GHz using a Fabry-Perot-type resonator pulsed-jet Fourier-transform microwave spectrometer. Gaseous samples of both chalcogenides were prepared by laser ablation of suitable target rods and were stabilized in supersonic jets of Ar. Global multi-isotopolog analyses of all available high-resolution data produced spectroscopic Dunham parameters Y01, Y11, Y21, Y31, Y02, and Y12 for both species, as well as Born-Oppenheimer breakdown (BOB) coefficients delta01 for Sn, Se, and Te. A direct fit of the same data sets to an appropriate radial Hamiltonian yielded analytic potential energy functions and BOB radial functions for the X 1Sigma+ electronic state of both SnSe and SnTe. Additionally, the magnetic hyperfine interaction produced by the dipolar nuclei 119Sn, 117Sn, 77Se, and 125Te was observed, yielding first determinations of the corresponding spin-rotation coupling constants.
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Affiliation(s)
- Luca Bizzocchi
- Dipartimento di Chimica G. Ciamician, Università di Bologna, Via F. Selmi 2, 40126 Bologna, Italy
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31
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Müller HSP, McCarthy MC, Bizzocchi L, Gupta H, Esser S, Lichau H, Caris M, Lewen F, Hahn J, Degli Esposti C, Schlemmer S, Thaddeus P. Rotational spectroscopy of the isotopic species of silicon monosulfide, SiS. Phys Chem Chem Phys 2007; 9:1579-86. [PMID: 17429551 DOI: 10.1039/b618799d] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Pure rotational transitions of silicon monosulfide ((28)Si(32)S) and its rare isotopic species have been observed in their ground as well as vibrationally excited states by employing Fourier transform microwave (FTMW) spectroscopy of a supersonic molecular beam at centimetre wavelengths (13-37 GHz) and by using long-path absorption spectroscopy at millimetre and submillimetre wavelengths (127-925 GHz). The latter measurements include 91 transition frequencies for (28)Si(32)S, (28)Si(33)S, (28)Si(34)S, (29)Si(32)S and (30)Si(32)S in upsilon = 0, as well as 5 lines for (28)Si(32)S in upsilon = 1, with rotational quantum numbers J''< or = 52. The centimetre-wave measurements include more than 300 newly recorded lines. Together with previous data they result in almost 600 transitions (J'' = 0 and 1) from all twelve possible isotopic species, including (29)Si(36)S and (30)Si(36)S, which have fractional abundances of about 7 x 10(-6) and 4.5 x 10(-6), respectively. Rotational transitions were observed from upsilon = 0 for the least abundant isotopic species to as high as upsilon = 51 for the main species. Owing to the high spectral resolution of the FTMW spectrometer, hyperfine structure from the nuclear electric quadrupole moment of (33)S was resolved for species containing this isotope, as was much smaller nuclear spin-rotation splitting for isotopic species involving (29)Si. By combining the measurements here with previously published microwave and infrared data in one global fit, an improved set of spectroscopic parameters for SiS has been derived which include several terms describing the breakdown of the Born-Oppenheimer approximation. With this parameter set, highly accurate rotational frequencies for this important astronomical molecule can now be predicted well into the terahertz region.
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Affiliation(s)
- H S P Müller
- I. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, 50937, Köln, Germany.
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32
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33
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Bizzocchi L, Esposti CD, Dore L, Puzzarini C. Lamb-dip millimeter-wave spectroscopy of HCP: Experimental and theoretical determination of 31P nuclear spin–rotation coupling constant and magnetic shielding. Chem Phys Lett 2005. [DOI: 10.1016/j.cplett.2005.03.134] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Bizzocchi L, Degli Esposti C, Botschwina P. Vibrationally excited states of NC4P: millimetre-wave spectroscopy and coupled cluster calculationsElectronic supplementary information (ESI) available: Experimental frequencies and least-squares residuals (in MHz) for seven vibrational states of NC4P. See http://www.rsc.org/suppdata/cp/b3/b311745f/. Phys Chem Chem Phys 2004. [DOI: 10.1039/b311745f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Bizzocchi L, Degli Esposti C, Botschwina P. Millimeter-wave spectroscopy and coupled cluster calculations for a new phosphorus–carbon chain: HC5P. J Chem Phys 2003. [DOI: 10.1063/1.1576380] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Bizzocchi L, Degli Esposti C, Botschwina P. Vibrationally excited states of HC5P: millimetre-wave spectroscopy and coupled cluster calculationsElectronic supplementary information (ESI) available: Theoretical force constants, measured transition frequencies and least-squares residuals. See http://www.rsc.org/suppdata/cp/b3/b307069g/. Phys Chem Chem Phys 2003. [DOI: 10.1039/b307069g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Bizzocchi L, Esposti CD. Pyrolysis of sulfur tetrafluoride over boron: Excited-state rotational spectra and equilibrium structure of fluorothioborine (FBS). J Chem Phys 2001. [DOI: 10.1063/1.1402990] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Bizzocchi L, Degli Esposti C, Thorwirth S, Müller HSP, Lewen F, Winnewisser G. Rotational spectroscopy of C-cyanophosphaethyne, NCCP, in states of multiple vibrational excitation. Phys Chem Chem Phys 2001. [DOI: 10.1039/b102775c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Abstract
The rotational spectra of the unstable HCCCP molecule have been investigated in the millimeter-wave region for the main excited vibrational states which lie below 1000 cm(-1), namely nu(4) (C&bond;C stretch), nu(5) (HCC bend), nu(6) (CCC bend), nu(7) (CCP bend), 2nu(6), 2nu(7), 3nu(7), 4nu(7), nu(5) + nu(7), and nu(6) + nu(7). l-type resonance effects have been taken into account in the analysis of the spectra, so that the values of the anharmonicity constants x(L(66)), x(L(77)), x(L(57)), and x(L(67)) could be determined. The anharmonic interactions which couple the nu(4) state with nu(6) + nu(7), 2nu(6), and 4nu(7) have been also considered, yielding the unperturbed value of the alpha(4) vibration-rotation coupling constant. Copyright 2001 Academic Press.
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Affiliation(s)
- L Bizzocchi
- Dipartimento di Chimica "G. Ciamician,", Università di Bologna, Via F. Selmi 2, Bologna, 40126, Italy
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Bizzocchi L, Thorwirth S, Müller HS, Lewen F, Winnewisser G. Submillimeter-Wave Spectroscopy of Phosphaalkynes: HCCCP, NCCP, HCP, and DCP. J Mol Spectrosc 2001; 205:110-116. [PMID: 11148114 DOI: 10.1006/jmsp.2000.8234] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The submillimeter-wave rotational spectra of the unstable phosphorus-bearing molecules HCCCP (phosphabutadiyne) and NCCP (C-cyanophosphaethyne) have been investigated in selected frequency regions between 490 and 815 GHz using the Cologne Terahertz Spectrometer. Both molecules were studied in their ground vibrational states. Additionally, vibrational satellites within the bending states v(4) = 1 and v(5) = 1 were recorded for NCCP. Furthermore, the ground state rotational spectra of the (13)C and (15)N isotopomers of NCCP were detected in natural abundance. The new measurements allowed us to evaluate the sextic centrifugal distortion constants for each isotopomer and vibrational state investigated. The pyrolysis reactions, through which HCCCP and NCCP were produced in situ, also yielded phosphaethyne, HCP, as a by-product. Some transitions of HCP and DCP were recorded in their ground vibrational states along with v(2) = 1 vibrational satellites of the former. Copyright 2001 Academic Press.
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Affiliation(s)
- L Bizzocchi
- Dipartimento di Chimica "G. Ciamician", Via F. Selmi 2, Bologna, I-40126, Italy
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Abstract
The rotational spectra of (32)S(35)Cl(2), (32)S(35)Cl(37)Cl, (32)S(37)Cl(2), and (34)S(35)Cl(2) in their ground vibrational states, as well as those of (32)S(35)Cl(2) and (32)S(35)Cl(37)Cl in their nu(2) and 2nu(2) excited states, have been studied in selected frequency regions between 100 and 370 GHz. Transitions involving a large range of quantum numbers have been observed, so that precise rotational and quartic centrifugal distortion constants could be determined for each of the spectra investigated. The complete set of sextic distortion constants was also obtained for the most abundant isotopomer in its ground vibrational state. The newly determined rotational constants of (34)S(35)Cl(2) and (32)S(37)Cl(2) allowed us to calculate the complete r(s) structure of sulfur dichloride using both single- and double-isotopic substitution methods. The quadratic force field has been refined using a larger set of quartic distortion constants and inertial defects. Copyright 2000 Academic Press.
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Affiliation(s)
- L Bizzocchi
- Dipartimento di Chimica "G. Ciamician,", Università di Bologna, Via F. Selmi 2, Bologna, 40126, Italy
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Abstract
Abstract The ground state rotational spectrum of propyne has been studied in selected regions between 509 and 820 GHz spanning the quantum numbers 29
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Affiliation(s)
- Holger S. P. Müller
- 1I. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, D-50937 Köln
| | - Sven Thorwirth
- 2Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, D-50937 Köln
| | - Luca Bizzocchi
- 3On leave from Dipartimento di Chimica "G. Ciamician", Universitä di Bologna, Via F. Selmi 2, 40126 Bologna, Italy
| | - Gisbert Winnewisser
- 1I. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, D-50937 Köln
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Bürger H, Ma S, Demaison J, Bizzocchi L. High-Resolution Infrared Spectrum of BrCN in the nu(2) and nu(1)/2nu(2) Regions. J Mol Spectrosc 2000; 199:109-115. [PMID: 10712877 DOI: 10.1006/jmsp.1999.7987] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
FT infrared spectra of BrCN have been recorded in the region of the nu(2) band near 340 cm(-1), the nu(1) band near 580 cm(-1), and the 2nu(2) band near 690 cm(-1) with a resolution between 2.9 and 4.7 x 10(-3) cm(-1). The vibrational levels (01(1)0), (10(0)0), (02(0)0), (02(2)0), (11(1)0), and (20(0)0) have been analyzed employing cold bands, hot bands, and new millimeter-wave transitions. Band-by-band polynomial analyses and a combined fit of all data relevant to the 2v(1) + v(2) = 2 polyad levels have been performed. The latter fit considered l-resonance interactions between the (02(0)0), e and (02(2)0), e levels and Fermi resonance between the two Sigma states (10(0)0) and (02(0)0). Altogether about 1000 pieces of data up to J = 100 were fitted for each of the two isotopic species with rms of the residuals of 2-8 x 10(-4) cm(-1) for the infrared and 10-120 kHz for the pure rotational data. Copyright 2000 Academic Press.
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Affiliation(s)
- H Bürger
- Anorganische Chemie, Universität-Gesamthochschule, FB 9, Wuppertal, 42097, Germany
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Tamassia F, Esposti CD, Bizzocchi L, Zelinger Z, Guennec ML, Demaison J, Litz M, Bürger H. Diode Laser and FTIR Spectroscopy of BrCN Isotopomers in the Region of the nu3 Band. J Mol Spectrosc 1998; 189:264-269. [PMID: 9647722 DOI: 10.1006/jmsp.1998.7544] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The nu3 fundamental band (C-N stretch) and four associated hot bands (01(1)1-01(1)0, 10(0)1-10(0)0, 02(0)1-02(0)0, and 02(2)1-02(2)0) of natural 79/81Br12C14N have been recorded and analyzed in the 4.8-µm region using an FTIR spectrometer. Analyses of the same hot bands, previously recorded using a diode laser spectrometer, are also presented for the 13C and 15N isotopically labeled species. Copyright 1998 Academic Press.
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Affiliation(s)
- F Tamassia
- Dipartimento di Chimica "G. Ciamician,", Università di Bologna, Via F. Selmi 2, Bologna, 40126, Italy
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Bizzocchi L, Dore L. Centrifugal Distortion Analysis of the Millimeter-Wave Spectrum of 1,1,1,2-Tetrafluoroethane. J Mol Spectrosc 1998; 188:251-252. [PMID: 9535693 DOI: 10.1006/jmsp.1998.7541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Copyright
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Affiliation(s)
- L Bizzocchi
- Dipartimento di Chimica "G. Ciamician", Università di Bologna, via F. Selmi 2, Bologna, 40126, Italy
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