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Winnewisser M, Winnewisser BP, De Lucia FC, Tokaryk DW, Ross SC, Billinghurst BE. Pursuit of quantum monodromy in the far-infrared and mid-infrared spectra of NCNCS using synchrotron radiation. Phys Chem Chem Phys 2014; 16:17373-407. [PMID: 25046372 DOI: 10.1039/c4cp01443j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Quantum monodromy has a dramatic and defining impact on all those physical properties of chain-molecules that depend on a large-amplitude bending coordinate, including in particular the distribution of the ro-vibrational energy levels. As revealed by its pure rotational (a-type) spectrum [B. P. Winnewisser et al., Phys. Chem. Chem. Phys., 2010, 12, 8158-8189] cyanogen iso-thiocyanate, NCNCS, is a particularly illuminating exemplar of quantum monodromy: it clearly shows the distinctive monodromy-induced dislocation of the ro-vibrational energy level pattern for its low-lying bending mode. This dislocation centers on a lattice defect in the energy vs. momentum map of the ro-vibrational levels at the top of the barrier to linearity, and represents an example of an excited state quantum phase transition [D. Larese and F. Iachello, J. Mol. Struct., 2011, 1006, 611-628]. To complete the data, so far limited to ΔJ = +1 transitions, we decided to measure the high-resolution far-infrared band of the large-amplitude bending vibration ν7, and, if possible, mid-infrared bands. This Perspectives article presents our ongoing progress towards this goal, beginning with the description of how to predict line positions and intensities of the a- and b-type bands of the large amplitude bending mode using the Generalized-SemiRigid-Bender (GSRB) Hamiltonian for NCNCS and ab initio dipole moment functions [B. P. Winnewisser et al., Phys. Chem. Chem. Phys., 2010, 12, 8158-8189]. We include background information about synchrotron physics to clarify the advantages and limitations of that radiation source for our experiments. Details of the chemical preparation and sample handling, leading to the realization that NCNCS is 50 kJ mol(-1) lower in energy than its isomer S(CN)2 [Z. Kisiel et al., J. Phys. Chem. A, 2013, 117, 13815-13824] are included. We present the far-infrared and mid-infrared spectrum of NCNCS obtained at the Canadian Light Source synchrotron, using the IFS 125HR Bruker Fourier transform spectrometer. Eight of the fundamental vibrational modes of NCNCS have now been observed at high resolution. Initial analyses of the data confirm band assignments and demonstrate the accuracy of the predictions.
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Affiliation(s)
- Manfred Winnewisser
- Department of Physics, The Ohio State University, Columbus Ohio, 43210-1106, USA.
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Evans CJ, Sinik A, Medcraft C, McNaughton D, Appadoo D, Robertson EG. IR Band profiling of dichlorodifluoromethane in the greenhouse window: high-resolution FTIR spectroscopy of ν2 and ν8. J Phys Chem A 2014; 118:2480-7. [PMID: 24611450 DOI: 10.1021/jp501302q] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The IR spectrum of dichlorodifluoromethane (i.e., R12 or Freon-12) is central to its role as a major greenhouse contributor. In this study, high-resolution (0.000 96 cm(-1)) Fourier transform infrared spectra have been measured for R12 samples either cooled to around 150 K or at ambient temperature using facilities on the infrared beamline of the Australian Synchrotron. Over 14,000 lines of C(35)Cl2F2 and C(35)Cl(37)ClF2 were assigned to the b-type ν2 band centered around 668 cm(-1). For the c-type ν8 band at 1161 cm(-1), over 10,000 lines were assigned to the two isotopologues. Rovibrational fits resulted in upper state constants for all these band systems. Localized avoided crossings in the ν8 system of C(35)Cl2F2, resulting from both a direct b-axis Coriolis interaction with ν3 + ν4 + ν7 and an indirect interaction with ν3 + ν4 + ν9, were treated. An improved set of ground state constants for C(35)Cl(37)ClF2 was obtained by a combined fit of IR ground state combination differences and previously published millimeter wave lines. Together these new sets of constants allow for accurate prediction of these bands and direct comparison with satellite data to enable accurate quantification.
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Affiliation(s)
- Corey J Evans
- Department of Chemistry, University of Leicester , University Road, Leicester LE1 7RH, U.K
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Charmet AP, Stoppa P, Tasinato N, Giorgianni S, Barone V, Biczysko M, Bloino J, Cappelli C, Carnimeo I, Puzzarini C. An integrated experimental and quantum-chemical investigation on the vibrational spectra of chlorofluoromethane. J Chem Phys 2013; 139:164302. [PMID: 24182024 PMCID: PMC4612436 DOI: 10.1063/1.4825380] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The vibrational analysis of the gas-phase infrared spectra of chlorofluoromethane (CH2ClF, HCFC-31) was carried out in the range 200-6200 cm(-1). The assignment of the absorption features in terms of fundamental, overtone, combination, and hot bands was performed on the medium-resolution (up to 0.2 cm(-1)) Fourier transform infrared spectra. From the absorption cross section spectra accurate values of the integrated band intensities were derived and the global warming potential of this compound was estimated, thus obtaining values of 323, 83, and 42 on a 20-, 100-, and 500-year horizon, respectively. The set of spectroscopic parameters here presented provides the basic data to model the atmospheric behavior of this greenhouse gas. In addition, the obtained vibrational properties were used to benchmark the predictions of state-of-the-art quantum-chemical computational strategies. Extrapolated complete basis set limit values for the equilibrium geometry and harmonic force field were obtained at the coupled-cluster singles and doubles level of theory augmented by a perturbative treatment of triple excitations, CCSD(T), in conjunction with a hierarchical series of correlation-consistent basis sets (cc-pVnZ, with n = T, Q, and 5), taking also into account the core-valence correlation effects and the corrections due to diffuse (aug) functions. To obtain the cubic and quartic semi-diagonal force constants, calculations employing second-order Møller-Plesset perturbation (MP2) theory, the double-hybrid density functional B2PLYP as well as CCSD(T) were performed. For all anharmonic force fields the performances of two different perturbative approaches in computing the vibrational energy levels (i.e., the generalized second order vibrational treatment, GVPT2, and the recently proposed hybrid degeneracy corrected model, HDCPT2) were evaluated and the obtained results allowed us to validate the spectroscopic predictions yielded by the HDCPT2 approach. The predictions of the deperturbed second-order perturbation approach, DVPT2, applied to the computation of infrared intensities beyond the double-harmonic approximation were compared to the accurate experimental values here determined. Anharmonic DFT and MP2 corrections to CCSD(T) intensities led to a very good agreement with the absorption cross section measurements over the whole spectral range here analysed.
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Affiliation(s)
- Andrea Pietropolli Charmet
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca’ Foscari Venezia, Calle Larga S. Marta 2137, I-30123 Venezia, Italy
| | - Paolo Stoppa
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca’ Foscari Venezia, Calle Larga S. Marta 2137, I-30123 Venezia, Italy
| | - Nicola Tasinato
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca’ Foscari Venezia, Calle Larga S. Marta 2137, I-30123 Venezia, Italy
| | - Santi Giorgianni
- Dipartimento di Scienze Molecolari e Nanosistemi, Università Ca’ Foscari Venezia, Calle Larga S. Marta 2137, I-30123 Venezia, Italy
| | - Vincenzo Barone
- Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy
- Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Pisa, Polo Fibonacci Largo B. Pontecorvo 3, I-56127 Pisa, Italy
| | | | - Julien Bloino
- Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy
- Consiglio Nazionale delle Ricerche, Istituto di Chimica dei Composti OrganoMetallici (CNR-ICCOM), Area della Ricerca CNR di Pisa, Via G. Moruzzi 1, I-56124 Pisa, Italy
| | - Chiara Cappelli
- Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy
- Universita’ di Pisa, Dipartimento di Chimica e Chimica Industriale, Via Risorgimento 35, I-56126 Pisa, Italy
| | - Ivan Carnimeo
- Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy
- Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Pisa, Polo Fibonacci Largo B. Pontecorvo 3, I-56127 Pisa, Italy
- Universita’ di Pisa, Dipartimento di Chimica e Chimica Industriale, Via Risorgimento 35, I-56126 Pisa, Italy
| | - Cristina Puzzarini
- Dipartimento di Chimica “Giacomo Ciamician”, Università di Bologna, Via F. Selmi, 2, 40126 Bologna, Italy
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Wong A, Thompson CD, Appadoo DR, Plathe R, Roy P, Manceron L, Barros J, McNaughton D. Synchrotron far-infrared spectroscopy of the two lowest fundamental modes of 1,1-difluoroethane. Mol Phys 2013. [DOI: 10.1080/00268976.2013.797115] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Andy Wong
- School of Chemistry, Monash University , Clayton, Australia
| | | | | | | | - Pascale Roy
- Synchrotron SOLEIL, l’Orme des Merisiers , Saint-Aubin, France
| | - Laurent Manceron
- Synchrotron SOLEIL, l’Orme des Merisiers , Saint-Aubin, France
- LADIR, CNRS-UPMC, UMR 7075 , Paris, France
| | - Joanna Barros
- Synchrotron SOLEIL, l’Orme des Merisiers , Saint-Aubin, France
| | - Don McNaughton
- School of Chemistry, Monash University , Clayton, Australia
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Cuisset A, Sadovskií DA. Gyroscopic destabilisation in polyatomic molecules: rotational structure of the low-frequency bending vibrational states ν(23) and ν(11) of dimethylsulfoxide. J Chem Phys 2013; 138:234302. [PMID: 23802955 DOI: 10.1063/1.4809738] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
We give details of the spectroscopic observation of the gyroscopic destabilisation in the ν23 vibrational state of dimethylsulfoxide (DMSO) announced by Cuisset, Pirali, and Sadovskií [Phys. Rev. Lett. 109, 094101 (2012)]. Following the first successful high-resolution spectroscopic study of the rotational structure of the "perpendicular" band of DMSO at 324 cm(-1) associated with the ν23 bending vibrational mode, the rare subsystem of ν23 rotational levels consisting of a series of fourfold quasidegenerate levels (4-clusters) was identified. Our complete analysis of the underlying rotational dynamics uncovered a bifurcation leading to the gyroscopic destabilisation of one of the two stable principal axes of inertia, a phenomenon known previously only in a few triatomic molecules.
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Affiliation(s)
- Arnaud Cuisset
- Laboratoire de Physico-Chimie de l'Atmosphère, Département de physique, Université du Littoral - Côte d'Opale, 59140 Dunkerque, France.
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McNaughton D, Robertson EG, Thompson CD, Chimdi T, Bane MK, Appadoo D. Overview of High-Resolution Infrared Measurement and Analysis for Atmospheric Monitoring of Halocarbons. Anal Chem 2010; 82:7958-64. [DOI: 10.1021/ac101425d] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Don McNaughton
- School of Chemistry, Monash University, Wellington Road, Clayton, Victoria 3800, Australia, La Trobe University, Department of Chemistry, Bundoora, Victoria 3086, Australia, and Australian Synchrotron, Blackburn Road, Clayton, Victoria 3168, Australia
| | - Evan G. Robertson
- School of Chemistry, Monash University, Wellington Road, Clayton, Victoria 3800, Australia, La Trobe University, Department of Chemistry, Bundoora, Victoria 3086, Australia, and Australian Synchrotron, Blackburn Road, Clayton, Victoria 3168, Australia
| | - Christopher D. Thompson
- School of Chemistry, Monash University, Wellington Road, Clayton, Victoria 3800, Australia, La Trobe University, Department of Chemistry, Bundoora, Victoria 3086, Australia, and Australian Synchrotron, Blackburn Road, Clayton, Victoria 3168, Australia
| | - Tarekegn Chimdi
- School of Chemistry, Monash University, Wellington Road, Clayton, Victoria 3800, Australia, La Trobe University, Department of Chemistry, Bundoora, Victoria 3086, Australia, and Australian Synchrotron, Blackburn Road, Clayton, Victoria 3168, Australia
| | - Michael K. Bane
- School of Chemistry, Monash University, Wellington Road, Clayton, Victoria 3800, Australia, La Trobe University, Department of Chemistry, Bundoora, Victoria 3086, Australia, and Australian Synchrotron, Blackburn Road, Clayton, Victoria 3168, Australia
| | - Dominique Appadoo
- School of Chemistry, Monash University, Wellington Road, Clayton, Victoria 3800, Australia, La Trobe University, Department of Chemistry, Bundoora, Victoria 3086, Australia, and Australian Synchrotron, Blackburn Road, Clayton, Victoria 3168, Australia
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Cuisset A, Nanobashvili L, Smirnova I, Bocquet R, Hindle F, Mouret G, Pirali O, Roy P, Sadovskií DA. Far-infrared high resolution synchrotron FTIR spectroscopy of the ν11 bending vibrational fundamental transition of dimethylsulfoxyde. Chem Phys Lett 2010. [DOI: 10.1016/j.cplett.2010.04.042] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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PM-IRRAS mapping of ultrathin molecular films with high spatial resolution. Anal Bioanal Chem 2009; 395:1641-50. [DOI: 10.1007/s00216-009-3035-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2009] [Revised: 07/21/2009] [Accepted: 08/03/2009] [Indexed: 10/20/2022]
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