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Dinu DF, Bartl P, Quoika PK, Podewitz M, Liedl KR, Grothe H, Loerting T. Increase of Radiative Forcing through Midinfrared Absorption by Stable CO 2 Dimers? J Phys Chem A 2022; 126:2966-2975. [PMID: 35533210 PMCID: PMC9125687 DOI: 10.1021/acs.jpca.2c00857] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
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We performed matrix-isolation
infrared (MI-IR) spectroscopy of
carbon dioxide monomers, CO2, and dimers, (CO2)2, trapped in neon and in air. On the basis of vibration
configuration interaction (VCI) calculations accounting for mode coupling
and anharmonicity, we identify additional infrared-active bands in
the MI-IR spectra due to the (CO2)2 dimer. These
bands are satellite bands next to the established CO2 monomer
bands, which appear in the infrared window of Earth’s atmosphere
at around 4 and 15 μm. In a systematic carbon dioxide mixing
ratio study using neon matrixes, we observe a significant fraction
of the dimer at mixing ratios above 300 ppm, with a steep increase
up to 1000 ppm. In neon matrix, the dimer increases the IR absorbance
by about 15% at 400 ppm compared to the monomer absorbance alone.
This suggests a high fraction of the (CO2)2 dimer
in our matrix experiments. In atmospheric conditions, such increased
absorbance would significantly amplify radiative forcings and, thus,
the greenhouse warming. To enable a comparison of our laboratory experiment
with various atmospheric conditions (Earth, Mars, Venus), we compute
the thermodynamics of the dimerization accordingly. The dimerization
is favored at low temperatures and/or high carbon dioxide partial
pressures. Thus, we argue that matrix isolation does not trap the
gas composition “as is”. Instead, the gas is precooled
to 40 K, where CO2 dimerizes before being trapped in the
matrix, already at very low carbon dioxide partial pressures. In the
context of planetary atmospheres, our results improve understanding
of the greenhouse effect for planets of rather thick CO2 atmospheres such as Venus, where a significant fraction of the (CO2)2 dimer can be expected. There, the necessity
of including the mid-IR absorption by stable (CO2)2 dimers in databases used for modeling radiative forcing,
such as HITRAN, arises.
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Affiliation(s)
- Dennis F Dinu
- Institute of General, Inorganic and Theoretical Chemistry, University of Innsbruck, A-6020 Innsbruck, Austria.,Institute of Physical Chemistry, University of Innsbruck, A-6020 Innsbruck, Austria.,Institute of Materials Chemistry, Technische Universität Wien, A-1060 Vienna, Austria
| | - Pit Bartl
- Institute of Physical Chemistry, University of Innsbruck, A-6020 Innsbruck, Austria
| | - Patrick K Quoika
- Institute of General, Inorganic and Theoretical Chemistry, University of Innsbruck, A-6020 Innsbruck, Austria
| | - Maren Podewitz
- Institute of General, Inorganic and Theoretical Chemistry, University of Innsbruck, A-6020 Innsbruck, Austria.,Institute of Materials Chemistry, Technische Universität Wien, A-1060 Vienna, Austria
| | - Klaus R Liedl
- Institute of General, Inorganic and Theoretical Chemistry, University of Innsbruck, A-6020 Innsbruck, Austria
| | - Hinrich Grothe
- Institute of Materials Chemistry, Technische Universität Wien, A-1060 Vienna, Austria
| | - Thomas Loerting
- Institute of Physical Chemistry, University of Innsbruck, A-6020 Innsbruck, Austria
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Voute A, Gatti F, Møller KB, Henriksen NE. Femtochemistry of bimolecular reactions from weakly bound complexes: computational study of the H + H'OD → H'OH + D or HOD + H' exchange reactions. Phys Chem Chem Phys 2021; 23:27207-27226. [PMID: 34850799 DOI: 10.1039/d1cp04391a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A full-dimensional wavepacket propagation describing the bimolecular exchange reactions H + H'OD → H'OH + D or HOD + H' initiated by photolysis of HCl in the hydrogen-bound complex (HCl)⋯(HOD) is reported. The dynamics of this reaction is carried out with the MCTDH method on an ab initio potential energy surface (PES) of H3O and the initial state is derived from the ground state wavefunction of the complex obtained by relaxation on its own electronic ground state ab initio PES. The description of the system makes use of polyspherical coordinates parametrizing a set of Radau and Jacobi vectors. The calculated energy- and time-resolved reaction probabilities show, owing to the large collision energies at play stemming from the (almost full) photolysis of HCl, that the repulsion between oxygen in the H'OD molecule and the incoming hydrogen atom is the main feature of the collision and leads to non-reactive scattering. No abstraction reaction products are observed. However, both exchange processes are still observable, with a preference in O-H' bond dissociation over that of O-D. The selectivity is reversed upon vibrational pre-excitation of the O-D stretching mode in the H'OD molecule. It is shown that, after the collision, the hydrogen atom of HCl does most likely not encounter the almost stationary chlorine atom again but we also consider the limit case where the H atom is forced to collide multiple times against H'OD as a result of being pushed back by the Cl atom.
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Affiliation(s)
- Alexandre Voute
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kongens Lyngby, Denmark.
| | - Fabien Gatti
- ISMO, Institut des Sciences Moléculaires d'Orsay - UMR 8214 CNRS/Université Paris-Saclay, F-91405 Orsay, France
| | - Klaus B Møller
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kongens Lyngby, Denmark.
| | - Niels E Henriksen
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kongens Lyngby, Denmark.
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3
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Anharmonicity modeling in hydrogen bonded solvent dimers. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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4
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Bader F, Riedel S, Beckers H, Müller C, Tremblay JC, Paulus B. The Peculiar Interaction of Trifluoride Anions with Cryogenic Rare Gas Matrices. J Phys Chem A 2021; 125:6221-6227. [PMID: 34251823 DOI: 10.1021/acs.jpca.1c04711] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In this contribution, we present theoretical modeling of the interaction between rare gas matrices and a trifluoride guest anion, as well as its quantitative effect on measured vibrational spectra. Using a combination of coupled-cluster electronic structure calculations and a many-body potential expansion coupled with permutation invariant polynomial fitting and anharmonic vibrational spectrum simulations, we shed light on the origin of the trifluoride matrix effects observed experimentally. The theoretical spectra are found to reproduce accurately the measured data while providing deeper insights into the effects of the guest-host interaction. The investigations reveal that neon can only stabilize trifluoride in hexagonal cavities formed by double vacancies, while argon can host the anion in a variety of cavities ranging from zero to two defects in the matrix. The origin of this structural variability can be traced back to the disparate strengths of the host-host interactions in neon and argon. The present work demonstrates the importance of theoretical modeling to complement matrix isolation experiments, which alone do not provide direct information about the structure of the matrices or about the physical origin of their interaction and of their spectroscopic signature.
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Affiliation(s)
- Frederik Bader
- Institut für Chemie und Biochemie, Freie Universität Berlin, D-14195 Berlin, Germany
| | - Sebastian Riedel
- Institut für Chemie und Biochemie, Freie Universität Berlin, D-14195 Berlin, Germany
| | - Helmut Beckers
- Institut für Chemie und Biochemie, Freie Universität Berlin, D-14195 Berlin, Germany
| | - Carsten Müller
- Institut für Chemie und Biochemie, Freie Universität Berlin, D-14195 Berlin, Germany
| | - Jean Christophe Tremblay
- Laboratoire de Physique et Chimie Théoriques, CNRS-Université de Lorraine, UMR 7019, ICPM, 1Bd Arago, 57070 Metz, France
| | - Beate Paulus
- Institut für Chemie und Biochemie, Freie Universität Berlin, D-14195 Berlin, Germany
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Dinu DF, Podewitz M, Grothe H, Loerting T, Liedl KR. On the synergy of matrix-isolation infrared spectroscopy and vibrational configuration interaction computations. Theor Chem Acc 2020; 139:174. [PMID: 33192169 PMCID: PMC7652801 DOI: 10.1007/s00214-020-02682-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Accepted: 10/05/2020] [Indexed: 11/08/2022]
Abstract
The key feature of matrix-isolation infrared (MI-IR) spectroscopy is the isolation of single guest molecules in a host system at cryogenic conditions. The matrix mostly hinders rotation of the guest molecule, providing access to pure vibrational features. Vibrational self-consistent field (VSCF) and configuration interaction computations (VCI) on ab initio multimode potential energy surfaces (PES) give rise to anharmonic vibrational spectra. In a single-sourced combination of these experimental and computational approaches, we have established an iterative spectroscopic characterization procedure. The present article reviews the scope of this procedure by highlighting the strengths and limitations based on the examples of water, carbon dioxide, methane, methanol, and fluoroethane. An assessment of setups for the construction of the multimode PES on the example of methanol demonstrates that CCSD(T)-F12 level of theory is preferable to compute (a) accurate vibrational frequencies and (b) equilibrium or vibrationally averaged structural parameters. Our procedure has allowed us to uniquely assign unknown or disputed bands and enabled us to clarify problematic spectral regions that are crowded with combination bands and overtones. Besides spectroscopic assignment, the excellent agreement between theory and experiment paves the way to tackle questions of rather fundamental nature as to whether or not matrix effects are systematic, and it shows the limits of conventional notations used by spectroscopists.
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Affiliation(s)
- Dennis F Dinu
- Institute of General, Inorganic and Theoretical Chemistry, University of Innsbruck, Innsbruck, Austria.,Institute of Material Chemistry, TU Vienna, Vienna, Austria.,Institute of Physical Chemistry, University of Innsbruck, Innsbruck, Austria
| | - Maren Podewitz
- Institute of General, Inorganic and Theoretical Chemistry, University of Innsbruck, Innsbruck, Austria
| | - Hinrich Grothe
- Institute of Material Chemistry, TU Vienna, Vienna, Austria
| | - Thomas Loerting
- Institute of Physical Chemistry, University of Innsbruck, Innsbruck, Austria
| | - Klaus R Liedl
- Institute of General, Inorganic and Theoretical Chemistry, University of Innsbruck, Innsbruck, Austria
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Wespiser C, Ayotte P, Soldera A. Exploring rotation-translation coupling for a confined asymmetric rotor using molecular dynamics simulations: the case of the water molecule trapped inside a rare gas matrix. MOLECULAR SIMULATION 2020. [DOI: 10.1080/08927022.2020.1807019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Clément Wespiser
- Département de chimie, Université de Sherbrooke, Sherbrooke, Canada
| | - Patrick Ayotte
- Département de chimie, Université de Sherbrooke, Sherbrooke, Canada
| | - Armand Soldera
- Département de chimie, Université de Sherbrooke, Sherbrooke, Canada
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Yamakawa K, Nasu H, Suzuki N, Shimizu G, Arakawa I. Terahertz and mid-infrared spectroscopy of matrix-isolated clusters and matrix-sublimation ice of D 2O. J Chem Phys 2020; 152:174310. [PMID: 32384850 DOI: 10.1063/5.0005766] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We have established an apparatus for terahertz and mid-infrared spectroscopy in an ultrahigh vacuum and have measured absorption spectra of D2O clusters trapped in solid Ar. To assign terahertz absorption peaks due to the D2O dimer, trimer, and tetramer, the dependence of the spectrum on the annealing temperature and D2O dilution was analyzed. The assignment was also examined by ab initio calculations with the use of the "our own N-layered integrated molecular orbital and molecular mechanics" method, where the flexibility of surrounding Ar atoms was systematically incorporated. We identified all the intermolecular fundamentals of the dimer and those with significant intensities of the trimer and tetramer, whose structural symmetries were revealed to be broken down. After isolating the D2O clusters in solid Ar, we sublimated only Ar atoms to leave behind matrix-sublimation ice, which was found to be amorphous- or crystal-like depending on the formation conditions: the dilution and sublimation temperature. The crystallinity of matrix-sublimation ice was determined by decomposing its terahertz spectrum into the spectra of amorphous and crystalline ices. Since the crystallinity got higher by raising the dilution and sublimation temperature, the diffusion of the D2O monomer on the surface of sublimating solid Ar was found to be crucial to the crystallization of the sublimation ice.
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Affiliation(s)
- Koichiro Yamakawa
- Advanced Science Research Center, Japan Atomic Energy Agency, 2-4 Shirakata, Tokai, Naka, Ibaraki 319-1195, Japan
| | - Hirokazu Nasu
- Department of Physics, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan
| | - Natsumi Suzuki
- Department of Physics, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan
| | - Genki Shimizu
- Department of Physics, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan
| | - Ichiro Arakawa
- Department of Physics, Gakushuin University, 1-5-1 Mejiro, Toshima-ku, Tokyo 171-8588, Japan
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Köck EM, Bernard J, Podewitz M, Dinu DF, Huber RG, Liedl KR, Grothe H, Bertel E, Schlögl R, Loerting T. Alpha-Carbonic Acid Revisited: Carbonic Acid Monomethyl Ester as a Solid and its Conformational Isomerism in the Gas Phase. Chemistry 2020; 26:285-305. [PMID: 31593601 PMCID: PMC6972543 DOI: 10.1002/chem.201904142] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 10/07/2019] [Indexed: 11/16/2022]
Abstract
In this work, earlier studies reporting α‐H2CO3 are revised. The cryo‐technique pioneered by Hage, Hallbrucker, and Mayer (HHM) is adapted to supposedly prepare carbonic acid from KHCO3. In methanolic solution, methylation of the salt is found, which upon acidification transforms to the monomethyl ester of carbonic acid (CAME, HO‐CO‐OCH3). Infrared spectroscopy data both of the solid at 210 K and of the evaporated molecules trapped and isolated in argon matrix at 10 K are presented. The interpretation of the observed bands on the basis of carbonic acid [as suggested originally by HHM in their publications from 1993–1997 and taken over by Winkel et al., J. Am. Chem. Soc. 2007 and Bernard et al., Angew. Chem. Int. Ed. 2011] is inferior compared with the interpretation on the basis of CAME. The assignment relies on isotope substitution experiments, including deuteration of the OH‐ and CH3‐ groups as well as 12C and 13C isotope exchange and on variation of the solvents in both preparation steps. The interpretation of the single molecule spectroscopy experiments is aided by a comprehensive calculation of high‐level ab initio frequencies for gas‐phase molecules and clusters in the harmonic approximation. This analysis provides evidence for the existence of not only single CAME molecules but also CAME dimers and water complexes in the argon matrix. Furthermore, different conformational CAME isomers are identified, where conformational isomerism is triggered in experiments through UV irradiation. In contrast to earlier studies, this analysis allows explanation of almost every single band of the complex spectra in the range between 4000 and 600 cm−1.
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Affiliation(s)
- Eva-Maria Köck
- Institute of Physical Chemistry, University of Innsbruck, Innrain 52c, 6020, Innsbruck, Austria.,Max-Planck-Institut für Chemische Energiekonversion, Stiftstraße 34-36, 45470, Mülheim an der Ruhr, Germany
| | - Jürgen Bernard
- Institute of Physical Chemistry, University of Innsbruck, Innrain 52c, 6020, Innsbruck, Austria.,Max-Planck-Institut für Chemische Energiekonversion, Stiftstraße 34-36, 45470, Mülheim an der Ruhr, Germany
| | - Maren Podewitz
- Institute of General, Inorganic and Theoretical Chemistry, University of Innsbruck, Innrain 80-82, 6020, Innsbruck, Austria
| | - Dennis F Dinu
- Institute of General, Inorganic and Theoretical Chemistry, University of Innsbruck, Innrain 80-82, 6020, Innsbruck, Austria
| | - Roland G Huber
- Institute of General, Inorganic and Theoretical Chemistry, University of Innsbruck, Innrain 80-82, 6020, Innsbruck, Austria
| | - Klaus R Liedl
- Institute of General, Inorganic and Theoretical Chemistry, University of Innsbruck, Innrain 80-82, 6020, Innsbruck, Austria
| | - Hinrich Grothe
- Institute of Materials Chemistry, TU Wien, Getreidemarkt 9/165, 1060, Vienna, Austria
| | - Erminald Bertel
- Institute of Physical Chemistry, University of Innsbruck, Innrain 52c, 6020, Innsbruck, Austria
| | - Robert Schlögl
- Max-Planck-Institut für Chemische Energiekonversion, Stiftstraße 34-36, 45470, Mülheim an der Ruhr, Germany
| | - Thomas Loerting
- Institute of Physical Chemistry, University of Innsbruck, Innrain 52c, 6020, Innsbruck, Austria
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9
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Dinu DF, Podewitz M, Grothe H, Loerting T, Liedl KR. Decomposing anharmonicity and mode-coupling from matrix effects in the IR spectra of matrix-isolated carbon dioxide and methane. Phys Chem Chem Phys 2020; 22:17932-17947. [DOI: 10.1039/d0cp02121k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A combined experimental and computational approach revealed similarities and differences in the vibrational signature of matrix-isolated carbon dioxide and methane.
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Affiliation(s)
- Dennis F. Dinu
- Institute of General
- Inorganic and Theoretical Chemistry
- University of Innsbruck
- A-6020 Innsbruck
- Austria
| | - Maren Podewitz
- Institute of General
- Inorganic and Theoretical Chemistry
- University of Innsbruck
- A-6020 Innsbruck
- Austria
| | - Hinrich Grothe
- Institute of Materials Chemistry
- TU Wien
- A-1060 Vienna
- Austria
| | - Thomas Loerting
- Institute of Physical Chemistry
- University of Innsbruck
- A-6020 Innsbruck
- Austria
| | - Klaus R. Liedl
- Institute of General
- Inorganic and Theoretical Chemistry
- University of Innsbruck
- A-6020 Innsbruck
- Austria
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