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Mihrin D, Voute A, Jakobsen PW, Feilberg KL, Wugt Larsen R. The effect of alkylation on the micro-solvation of ethers revealed by highly localized water librational motion. J Chem Phys 2022; 156:084305. [DOI: 10.1063/5.0081161] [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: 11/14/2022] Open
Abstract
The specific far-infrared spectral signatures associated with highly localized large-amplitude out-of-plane librational motion of water molecules have recently been demonstrated to provide sensitive spectroscopic probes for the micro-solvation of organic molecules [Mihrin et al., Phys. Chem. Chem. Phys. 21(4), 1717 (2019)]. The present work employs this direct far-infrared spectroscopic approach to investigate the non-covalent intermolecular forces involved in the micro-solvation of a selection of seven ether molecules with systematically varied alkyl substituents: dimethyl ether, diethyl ether, diisopropyl ether, ethyl methyl ether, t-butyl methyl ether, and t-butyl ethyl ether. The ranking of the observed out-of-plane water librational band signatures for this selected series of ether–water complexes embedded in inert neon matrices at 4 K reveals information about the interplay of directional intermolecular hydrogen bond motifs and non-directional and long-range dispersion interactions for the micro-solvated structures. These far-infrared observables differentiate minor subtle effects introduced by specific alkyl substituents and serve as rigorous experimental benchmarks for modern quantum chemical methodologies of various levels of scalability, which often fail to accurately predict the structural variations and corresponding vibrational signatures of the closely related systems. The accurate interaction energies of the series of ether–water complexes have been predicted by the domain based local pair natural orbital coupled cluster theory with single-, double-, and perturbative triple excitations, followed by a local energy decomposition analysis of the energy components. In some cases, the secondary dispersion forces are in direct competition with the primary intermolecular hydrogen bonds as witnessed by the specific out-of-plane librational signatures.
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Affiliation(s)
- D. Mihrin
- Danish Hydrocarbon Research and Technology Centre, Technical University of Denmark, Elektrovej 375, 2800 Kgs. Lyngby, Denmark
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kgs. Lyngby, Denmark
| | - A. Voute
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kgs. Lyngby, Denmark
| | - P. W. Jakobsen
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kgs. Lyngby, Denmark
| | - K. L. Feilberg
- Danish Hydrocarbon Research and Technology Centre, Technical University of Denmark, Elektrovej 375, 2800 Kgs. Lyngby, Denmark
| | - R. Wugt Larsen
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kgs. Lyngby, Denmark
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Mihrin D, Jakobsen PW, Voute A, Manceron L, Wugt Larsen R. High-Resolution Infrared Synchrotron Investigation of (HCN) 2 and a Semi-Experimental Determination of the Dissociation Energy D 0. Chemphyschem 2019; 20:3238-3244. [PMID: 31702872 PMCID: PMC6916300 DOI: 10.1002/cphc.201900811] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Indexed: 11/27/2022]
Abstract
The high‐resolution infrared absorption spectrum of the donor bending fundamental band ν61
of the homodimer (HCN)2 has been collected by long‐path static gas‐phase Fourier transform spectroscopy at 207 K employing the highly brilliant 2.75 GeV electron storage ring source at Synchrotron SOLEIL. The rovibrational structure of the ν61
transition has the typical appearance of a perpendicular type band associated with a Σ–Π transition for a linear polyatomic molecule. The total number of 100 assigned transitions are fitted employing a standard semi‐rigid linear molecule Hamiltonian, providing the band origin ν0 of 779.05182(50) cm−1 together with spectroscopic parameters for the degenerate excited state. This band origin, blue‐shifted by 67.15 cm−1 relative to the HCN monomer, provides the final significant contribution to the change of intra‐molecular vibrational zero‐point energy upon HCN dimerization. The combination with the vibrational zero‐point energy contribution determined recently for the class of large‐amplitude inter‐molecular fundamental transitions then enables a complete determination of the total change of vibrational zero‐point energy of 3.35±0.30 kJ mol−1. The new spectroscopic findings together with previously reported benchmark CCSDT(Q)/CBS electronic energies [Hoobler et al. ChemPhysChem. 19, 3257–3265 (2018)] provide the best semi‐experimental estimate of 16.48±0.30 kJ mol−1 for the dissociation energy D0 of this prototypical homodimer.
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Affiliation(s)
- D Mihrin
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800, Kgs. Lyngby, Denmark
| | - P W Jakobsen
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800, Kgs. Lyngby, Denmark
| | - A Voute
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800, Kgs. Lyngby, Denmark
| | - L Manceron
- Synchrotron SOLEIL, L'Orme des Merisiers, Saint-Aubin-BP 48, 91192, Gif-sur-Yvette Cedex, France.,Lab. MONARIS, CNRS-UPMC UMR8233, 4 Place Jussieu, 75230, Paris Cedex, France
| | - R Wugt Larsen
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800, Kgs. Lyngby, Denmark
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Verseils M, Voute A, Langerome B, Deutsch M, Brubach JB, Kalaboukhov A, Nucara A, Calvani P, Roy P. Grazing-angle reflectivity setup for the low-temperature infrared spectroscopy of two-dimensional systems. J Synchrotron Radiat 2019; 26:1945-1950. [PMID: 31721739 DOI: 10.1107/s1600577519010920] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Accepted: 08/04/2019] [Indexed: 06/10/2023]
Abstract
A new optical setup is described that allows the reflectivity at grazing incidence to be measured, including ultrathin films and two-dimensional electron systems (2DES) down to liquid-helium temperatures, by exploiting the Berreman effect and the high brilliance of infrared synchrotron radiation. This apparatus is well adapted to detect the absorption of a 2DES of nanometric thickness, namely that which forms spontaneously at the interface between a thin film of LaAlO3 and its SrTiO3 substrate, and to determine its Drude parameters.
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Affiliation(s)
| | | | | | - Maxime Deutsch
- Synchrotron SOLEIL, St Aubin, 91192 Gif-sur-Yvette, France
| | | | - Alexei Kalaboukhov
- Department of Microtechnology and Nanoscience, Chalmers University, S-41296 Gothenburg, Sweden
| | - Alessandro Nucara
- CNR-SPIN and Dipartimento di Fisica, Università di Roma La Sapienza, 00185 Roma, Italy
| | - Paolo Calvani
- CNR-SPIN and Dipartimento di Fisica, Università di Roma La Sapienza, 00185 Roma, Italy
| | - Pascale Roy
- Synchrotron SOLEIL, St Aubin, 91192 Gif-sur-Yvette, France
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Mihrin D, Jakobsen PW, Voute A, Manceron L, Wugt Larsen R. High-resolution synchrotron terahertz investigation of the large-amplitude hydrogen bond librational band of (HCN) 2. Phys Chem Chem Phys 2018. [PMID: 29528052 DOI: 10.1039/c7cp08412a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
The high-resolution terahertz absorption spectrum of the large-amplitude intermolecular donor librational band ν of the homodimer (HCN)2 has been recorded by means of long-path static gas-phase Fourier transform spectroscopy at 207 K employing a highly brilliant electron storage ring source. The rovibrational structure of the ν band has the typical appearance of a perpendicular type band of a Σ-Π transition for a linear polyatomic molecule. The generated terahertz spectrum is analyzed employing a standard semi-rigid linear molecule Hamiltonian, yielding a band origin ν0 of 119.11526(60) cm-1 together with values for the excited state rotational constant B', the excited state quartic centrifugal distortion constant DJ' and the l-type doubling constant q for the degenerate state associated with the ν mode. The until now missing donor librational band origin enables the determination of an accurate experimental value for the vibrational zero-point energy of 2.50 ± 0.05 kJ mol-1 arising from the entire class of large-amplitude intermolecular modes. The spectroscopic findings are complemented by CCSD(T)-F12b/aug-cc-pV5Z (electronic energies) and CCSD(T)-F12b/aug-cc-pVQZ (force fields) electronic structure calculations, providing a (semi)-experimental value of 17.20 ± 0.20 kJ mol-1 for the dissociation energy D0 of this strictly linear weak intermolecular CHN hydrogen bond.
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Affiliation(s)
- D Mihrin
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kgs. Lyngby, Denmark.
| | - P W Jakobsen
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kgs. Lyngby, Denmark.
| | - A Voute
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kgs. Lyngby, Denmark.
| | - L Manceron
- Synchrotron SOLEIL, L'orme des Merisiers, Saint-Aubin-BP 48, 91192 Gif-sur-Yvette Cedex, France and Lab. MONARIS, CNRS-UPMC UMR8233, 4 Place Jussieu, 75230 Paris Cedex, France
| | - R Wugt Larsen
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kgs. Lyngby, Denmark.
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Andersen J, Voute A, Mihrin D, Heimdal J, Berg RW, Torsson M, Wugt Larsen R. Probing the global potential energy minimum of (CH2O)2: THz absorption spectrum of (CH2O)2 in solid neon and para-hydrogen. J Chem Phys 2017; 146:244311. [DOI: 10.1063/1.4990042] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- J. Andersen
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kongens Lyngby, Denmark
| | - A. Voute
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kongens Lyngby, Denmark
| | - D. Mihrin
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kongens Lyngby, Denmark
| | - J. Heimdal
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kongens Lyngby, Denmark
| | - R. W. Berg
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kongens Lyngby, Denmark
| | - M. Torsson
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kongens Lyngby, Denmark
| | - R. Wugt Larsen
- Department of Chemistry, Technical University of Denmark, Kemitorvet 206, 2800 Kongens Lyngby, Denmark
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