1
|
Kreis C, Schmitz JR, Merkt F. High-Resolution Photoelectron Spectroscopy of the Ground and First Excited Electronic States of MgXe . J Phys Chem A 2024; 128:3149-3157. [PMID: 38619915 PMCID: PMC11056989 DOI: 10.1021/acs.jpca.4c00940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Revised: 03/10/2024] [Accepted: 03/11/2024] [Indexed: 04/17/2024]
Abstract
We report on the characterization of the X+ 2Σ+ ground and the A+ 2ΠΩ (Ω = 1/2, 3/2) and B+ 2Σ+ electronically excited states of MgXe+. Rotationally cold MgXe in the a 3Π0(v″ = 0) metastable electronic state was generated in a laser-ablation supersonic-beam source. Following single-photon excitation from the metastable state, the vibrational structure of the X+ state of MgXe+ was measured by pulsed-field-ionization zero-kinetic-energy photoelectron spectroscopy, and the adiabatic ionization energy of the X+ ← a ionizing transition was determined to be EI/(hc) = 37,468.3(6) cm-1. Spectra of the A+ ← X+ and B+ ← X+ transitions were recorded by using the method of isolated-core Rydberg-dissociation spectroscopy. The observation of the Mg+(3p) 2P1/2 + Xe 1S0 dissociation limit enabled the determination of the dissociation energies of the X+ [D0(X+) = 2970(7) cm-1] and A+ states [D0(A1/2+) = 9781(7) cm-1 and D0(A3/2+) = 9603(7) cm-1]. We compare these results with those of earlier experimental studies and ab initio quantum-chemical calculations.
Collapse
Affiliation(s)
- C. Kreis
- Institute of Molecular Physical Science, ETH Zurich, Zurich CH-8093, Switzerland
| | - J. R. Schmitz
- Institute of Molecular Physical Science, ETH Zurich, Zurich CH-8093, Switzerland
| | - F. Merkt
- Institute of Molecular Physical Science, ETH Zurich, Zurich CH-8093, Switzerland
| |
Collapse
|
2
|
Araujo L, Fantuzzi F, Cardozo TM. Chemical Aristocracy: He 3 Dication and Analogous Noble-Gas-Exclusive Covalent Compounds. J Phys Chem Lett 2024; 15:3757-3763. [PMID: 38551487 PMCID: PMC11017316 DOI: 10.1021/acs.jpclett.4c00826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Revised: 03/23/2024] [Accepted: 03/25/2024] [Indexed: 04/12/2024]
Abstract
Herein, we predict the first set of covalently bonded triatomic molecular compounds composed exclusively of noble gases. Using a combination of double-hybrid DFT, CCSD(T), and MRCI+Q calculations and a range of bonding analyses, we explored a set of 270 doubly charged triatomics, which included various combinations of noble gases and main group elements. This extensive exploration uncovered nine noble-gas-exclusive covalent compounds incorporating helium, neon, argon, or combinations thereof, exemplified by cases such as He32+ and related systems. This work brings to light a previously uncharted domain of noble gas chemistry, demonstrating the potential of noble gases in forming covalent molecular clusters.
Collapse
Affiliation(s)
- Lucas Araujo
- Instituto
de Química, Universidade Federal
do Rio de Janeiro, Av. Athos da Silveira Ramos 149, Rio de Janeiro 21941-909, Brazil
| | - Felipe Fantuzzi
- School
of Chemistry and Forensic Science, University
of Kent, Park Wood Road, Canterbury CT2 7NH, U.K.
| | - Thiago M. Cardozo
- Instituto
de Química, Universidade Federal
do Rio de Janeiro, Av. Athos da Silveira Ramos 149, Rio de Janeiro 21941-909, Brazil
| |
Collapse
|
3
|
Schio L, Alagia M, Richter R, Zhaunerchyk V, Stranges S, Pirani F, Vecchiocattivi F, Parriani M, Falcinelli S. Double Photoionization of Nitrosyl Chloride by Synchrotron Radiation in the 24-70 eV Photon Energy Range. Molecules 2023; 28:5218. [PMID: 37446880 DOI: 10.3390/molecules28135218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Revised: 06/15/2023] [Accepted: 07/03/2023] [Indexed: 07/15/2023] Open
Abstract
The behavior of nitrosyl chloride (ClNO) exposed to ionizing radiation was studied by direct probing valence-shell electrons in temporal coincidence with ions originating from the fragmentation process of the transient ClNO2+. Such a molecular dication was produced by double photoionization with synchrotron radiation in the 24-70 eV photon energy range. The experiment has been conducted at the Elettra Synchrotron Facility of Basovizza (Trieste, Italy) using a light beam linearly polarized with the direction of the polarization vector parallel to the ClNO molecular beam axis. ClNO molecules crossing the photon beam at right angles in the scattering region are generated by effusive expansion and randomly oriented. The threshold energy for the double ionization of ClNO (30.1 ± 0.1 eV) and six dissociation channels producing NO+/Cl+, N+/Cl+, N+/O+, O+/Cl+, ClN+/O+, NO+/Cl2+ ion pairs, with their relative abundance and threshold energies, have been measured.
Collapse
Affiliation(s)
- Luca Schio
- IOM CNR Laboratorio TASC, 34012 Trieste, Italy
| | | | - Robert Richter
- Sincrotrone Trieste, Area Science Park, 34149 Trieste, Italy
| | - Vitali Zhaunerchyk
- Department of Physics, University of Gothenburg, 412 96 Gothenburg, Sweden
| | - Stefano Stranges
- IOM CNR Laboratorio TASC, 34012 Trieste, Italy
- Department of Chemistry and Drug Technology, University of Rome Sapienza, 00185 Rome, Italy
| | - Fernando Pirani
- Department of Civil and Environmental Engineering, University of Perugia, Via G. Duranti 93, 06125 Perugia, Italy
- Department of Chemistry, Biology and Biotechnologies, University of Perugia, Via Elce di Sotto 8, 06123 Perugia, Italy
| | - Franco Vecchiocattivi
- Department of Civil and Environmental Engineering, University of Perugia, Via G. Duranti 93, 06125 Perugia, Italy
| | - Marco Parriani
- Department of Civil and Environmental Engineering, University of Perugia, Via G. Duranti 93, 06125 Perugia, Italy
| | - Stefano Falcinelli
- Department of Civil and Environmental Engineering, University of Perugia, Via G. Duranti 93, 06125 Perugia, Italy
| |
Collapse
|
4
|
Kreis C, Holdener M, Génévriez M, Merkt F. High-resolution photoelectron spectroscopy of the ground and first excited electronic states of MgKr +. Mol Phys 2022. [DOI: 10.1080/00268976.2022.2152746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- C. Kreis
- Laboratory of Physical Chemistry, ETH Zurich, Zurich, Switzerland
| | - M. Holdener
- Laboratory of Physical Chemistry, ETH Zurich, Zurich, Switzerland
| | - M. Génévriez
- Institute of Condensed Matter and Nanosciences, Université catholique de Louvain, Louvain-la-Neuve, Belgium
| | - F. Merkt
- Laboratory of Physical Chemistry, ETH Zurich, Zurich, Switzerland
| |
Collapse
|
5
|
Armenta Butt S, Price SD. Bimolecular reactions of CH 2CN 2+ with Ar, N 2 and CO: reactivity and dynamics. Phys Chem Chem Phys 2022; 24:15824-15839. [PMID: 35758308 DOI: 10.1039/d2cp01523d] [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
The reactivity, energetics and dynamics of bimolecular reactions between CH2CN2+ and three neutral species (Ar, N2 and CO) have been studied using a position sensitive coincidence methodology at centre-of-mass collision energies of 4.3-5.0 eV. This is the first study of bimolecular reactions involving CH2CN2+, a species relevant to the ionospheres of planets and satellites, including Titan. All of the collision systems investigated display two collision-induced dissociation (CID) channels, resulting in the formation of C+ + CH2N+ and H+ + HC2N+. Evidence for channels involving further dissociation of the CID product HC2N+, forming H + CCN+, were detected in the N2 and CO systems. Proton-transfer from the dication to the neutral species occurs in all three of the systems via a direct mechanism. Additionally, there are product channels resulting from single electron transfer following collisions of CH2CN2+ with both N2 and CO, but interestingly no electron transfer following collisions with Ar. Electronic structure calculations of the lowest energy electronic states of CH2CN2+ reveal six local geometric minima: both doublet and quartet spin states for cyclic, linear (CH2CN), and linear isocyanide (CH2NC) molecular geometries. The lowest energy electronic state was determined to be the doublet state of the cyclic dication. The ready generation of C+ ions by collision-induced dissociation suggests that the cyclic or linear isocyanide dication geometries are present in the [CH2CN]2+ beam.
Collapse
Affiliation(s)
- Sam Armenta Butt
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK.
| | - Stephen D Price
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK.
| |
Collapse
|
6
|
Armenta Butt S, Price SD. Bimolecular reactions of S 2+ with Ar, H 2 and N 2: reactivity and dynamics. Phys Chem Chem Phys 2022; 24:8113-8128. [PMID: 35322816 DOI: 10.1039/d1cp05397c] [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
The reactivity, energetics and dynamics of bimolecular reactions between S2+ and three neutral species (Ar, H2 and N2) have been studied using a position-sensitive coincidence methodology at centre-of-mass collision energies below 6 eV. This is the first study of bimolecular reactions involving S2+, a species detected in planetary ionospheres, the interstellar medium, and in anthropogenic manufacturing processes. The reactant dication beam employed consists predominantly of S2+ in the ground 3P state, but some excited states are also present. Most of the observed reactions involve the ground state of S2+, but the dissociative electron transfer reactions appear to exclusively involve excited states of this atomic dication. We observe exclusively single electron-transfer between S2+ and Ar, a process which exhibits strong forward scatting typical of the Landau-Zener style dynamics observed for other dicationic electron transfer reactions. Following collisions between S2+ + H2, non-dissociative and dissociative single electron-transfer reactions were detected. The dynamics here show evidence for the formation of a long-lived collision complex, [SH2]2+, in the dissociative single electron-transfer channel. The formation of SH+ was not observed. In contrast, the collisions of S2+ + N2 result in the formation of SN+ + N+ in addition to the products of single electron-transfer reactions.
Collapse
Affiliation(s)
- Sam Armenta Butt
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK.
| | - Stephen D Price
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK.
| |
Collapse
|
7
|
Armenta Butt S, Price SD. Bond-forming and electron-transfer reactivity between Ar 2+ and N 2. Phys Chem Chem Phys 2021; 23:11287-11299. [PMID: 33954331 DOI: 10.1039/d1cp00918d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Collisions between Ar2+ and N2 have been studied using a coincidence technique at a centre-of-mass (CM) collision energy of 5.1 eV. Four reaction channels generating pairs of monocations are observed: Ar+ + N2+, Ar+ + N+, ArN+ + N+ and N+ + N+. The formation of Ar+ + N2+ is the most intense channel, displaying forward scattering but with a marked tail to higher scattering angles. This scattering, and other dynamics data, is indicative of direct electron transfer competing with a 'sticky' collision between the Ar2+ and N2 reactants. Here Ar+ is generated in its ground (2P) state and N2+ is primarily in the low vibrational levels of the C2Σu+ state. A minor channel involving the initial population of higher energy N2+ states, lying above the dissociation asymptote to N+ + N, which fluoresce to stable states of N2+ is also identified. The formation of Ar+ + N+ by dissociative single electron transfer again reveals the involvement of two different pathways for the initial electron transfer (direct or complexation). This reaction pathway predominantly involves excited states of Ar2+ (1D and 1S) populating N2+* in its dissociative C2Σu+, 22Πg and D2Πg states. Formation of ArN+ + N+ proceeds via a direct mechanism. The ArN+ is formed, with significant vibrational excitation, in its ground (X3Σ-) state. Formation of N+ + N+ is also observed as a consequence of double electron transfer forming N22+. The exoergicity of the subsequent N22+ dissociation reveals the population of the A1Πu and D3Πg dication states.
Collapse
Affiliation(s)
- Sam Armenta Butt
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK.
| | - Stephen D Price
- Department of Chemistry, University College London, 20 Gordon Street, London, WC1H 0AJ, UK.
| |
Collapse
|
8
|
Gonçalves dos Santos L, Franzreb K, Ornellas FR. Thermodynamic stability in transition metal-containing dicationic diatomics: Examining the case of CrO2+. Chem Phys Lett 2021. [DOI: 10.1016/j.cplett.2021.138525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
9
|
Wehrli D, Génévriez M, Merkt F. Spectroscopic characterization of a thermodynamically stable doubly charged diatomic molecule: MgAr 2. Phys Chem Chem Phys 2021; 23:10978-10987. [PMID: 33928972 PMCID: PMC8115400 DOI: 10.1039/d1cp00730k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Although numerous doubly positively charged diatomic molecules (diatomic dications) are known from investigations using mass spectrometry and ab initio quantum chemistry, only three of them, NO2+, N22+ and DCl2+, have been studied using rotationally resolved optical spectroscopy and only about a dozen by vibrationally resolved double-ionization methods. So far, no thermodynamically stable diatomic dication has been characterized spectroscopically, primarily because of experimental difficulties associated with their synthesis in sufficient densities in the gas phase. Indeed, such molecules typically involve, as constituents, rare-gas, halogen, chalcogen, and metal atoms. We report here on a new approach to characterize molecular dications based on high-resolution photoelectron spectroscopy of the singly charged parent molecular cation and present the first spectroscopic characterization of a thermodynamically stable diatomic dication, MgAr2+. From the fully resolved vibrational and partially resolved rotational structures of the photoelectron spectra of 24MgAr+ and 26MgAr+, we determined the potential-energy function of the electronic ground state of MgAr2+, its dissociation (binding) energy (D0 = 10 690(3) cm−1), and its harmonic (ωe(24MgAr2+) = 327.02(11) cm−1) and anharmonic (ωexe(24MgAr2+) = 2.477(15) cm−1) vibrational constants. The analysis enables us to explain quantitatively how the strong bond arises in this dication despite the fact that Ar and Mg2+ both have a full-shell rare-gas electronic configuration. We present a new method to study doubly charged molecules relying on high-resolution spectroscopy of the singly charged parent cation, and report on the first spectroscopic characterization of a thermodynamically stable diatomic dication, MgAr2+.![]()
Collapse
Affiliation(s)
- Dominik Wehrli
- Laboratory of Physical Chemistry, ETH Zurich, CH-8093 Zurich, Switzerland.
| | | | | |
Collapse
|
10
|
Ghanmi C, Farjallah M, Alshamrani R, Berriche H. Theoretical Investigation of the BeRb2+, BeCs2+, and SrRb2+ Dications. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2021. [DOI: 10.1134/s0036024421140077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
11
|
de Melo GF, Franzreb K, Ornellas FR. Exploring the electronic states of the hydroxyl dication OH 2+: thermodynamic (meta)stability, bound-free emission spectra, and charge transfer processes. Phys Chem Chem Phys 2021; 23:13672-13679. [PMID: 34124734 DOI: 10.1039/d1cp01695d] [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
Accurate potential energy curves were constructed for a manifold of electronic states of the hydroxyl dication using a highly correlated electronic structure approach (SA-CASSCF/MRCI+Q/aug-cc-pV5Z). The existence of a bound (meta)stable ground state and bound low-lying states for OH2+ are ruled out, but do not exclude the possibility of its transient formation and dissociation along the repulsive ground state potential energy curve. Our results do not support the conclusion reported for the observation of OH2+ by electron ionization from ground state OH+. Despite the repulsive character of the low-lying states, thermodynamic stability was indeed verified for the states 2 4Π and 3 4Σ- along with a series of metastable high-lying doublet states. For the (quasi)bound states, we obtained vibrational levels, spectroscopic parameters, and dipole moment functions. Using accurate transition dipole moment functions, we also evaluated bound-free emission transition probabilities and radiative lifetimes. For transitions from v'= 0, our estimates of 92.8 ns (4Π) and 9.3 ns (4Σ-) indicate that the ones obtained by a multichannel theory of predissociating states are too short (2-60 ps). Landau-Zener cross sections averaged over the Maxwellian distribution of relative velocities, and rate coefficients for the reaction O2+ + H → O+ + H+ were obtained using the potential energy curves of the states 4Π and 4Σ- associated with the channel O2+ + H and the repulsive ones dissociating into O+ + H+ leading to good results for the rate constant thus supporting its importance to explain the distribution of O+ in astrophysical plasmas.
Collapse
Affiliation(s)
- Gabriel Fernando de Melo
- Universidade de São Paulo, Instituto de Química, Departamento de Química Fundamental, Av. Prof. Lineu Prestes, 748, São Paulo, São Paulo, 05508-000, Brazil
| | - Klaus Franzreb
- Arizona State University, Department of Chemistry, Tempe, Arizona, USA
| | - Fernando R Ornellas
- Universidade de São Paulo, Instituto de Química, Departamento de Química Fundamental, Av. Prof. Lineu Prestes, 748, São Paulo, São Paulo, 05508-000, Brazil
| |
Collapse
|
12
|
Liu D, Li R, Ren J, Cheng Y, Yan B, Wu Y, Wang JG, Zhang SB. Predissociation resonances and accurate ab initio calculations of dication HF2+. RSC Adv 2021; 11:9600-9607. [PMID: 35423438 PMCID: PMC8695458 DOI: 10.1039/d1ra00837d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Accepted: 02/25/2021] [Indexed: 11/25/2022] Open
Abstract
It is very interesting and challenging to investigate the electronic structures of diatomic dications, due to the nature of coulombic repulsive and bound attractive dissociation limits and their avoided diabatic interactions. Using the multi-reference configuration interaction approach, comprehensive ab initio calculations of the first 36 electronic states, corresponding to 15 dissociation limits, of dication HF2+ are reported. Good agreements for the vertical excitation energies and dissociation limits are achieved with the available references. Besides the common interesting quantities as adiabatic potential energy curves, dipole moments and spectral constants for the bound states, the nonadiabatic radial coupling matrix elements for the 1,3Π states are also presented. A showcase for the diabatic potentials of 3Π states are presented and discussed. Furthermore, predissociation states from the nonadiabatic couplings or avoided crossing of potential energy curves, known as shape resonances in collisions, are also investigated by using the WKB and scattering methods. Highly accurate adiabatic potential curves of the 36 electronic states of the HF2+ dication by MRCI calculations. Panels (a), (b) and (c) correspond to the 16 singlet, 15 triplet and 4 quintet states, respectively. The nine bound states are highlighted and given in panel (d).![]()
Collapse
Affiliation(s)
- Dong Liu
- School of Physics and Information Technology
- Shaanxi Normal University
- Xi'an 710119
- China
| | - Rui Li
- Department of Physics,College of Science
- Qiqihar University
- Qiqihar 161006
- China
| | - Juan Ren
- School of Physics and Information Technology
- Shaanxi Normal University
- Xi'an 710119
- China
- School of Science
| | - Yongjun Cheng
- School of Physics and Information Technology
- Shaanxi Normal University
- Xi'an 710119
- China
| | - Bing Yan
- Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy
- Institute of Atomic and Molecular Physics
- Jilin University
- Changchun 130012
- China
| | - Yong Wu
- Data Center for High Energy Density Physics
- Institute of Applied Physics and Computational Mathematics
- Beijing
- China
| | - Jian Guo Wang
- Data Center for High Energy Density Physics
- Institute of Applied Physics and Computational Mathematics
- Beijing
- China
| | - Song Bin Zhang
- School of Physics and Information Technology
- Shaanxi Normal University
- Xi'an 710119
- China
| |
Collapse
|
13
|
Falcinelli S, Rosi M. Production and Characterization of Molecular Dications: Experimental and Theoretical Efforts. Molecules 2020; 25:molecules25184157. [PMID: 32932839 PMCID: PMC7571021 DOI: 10.3390/molecules25184157] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 09/08/2020] [Accepted: 09/09/2020] [Indexed: 11/16/2022] Open
Abstract
Molecular dications are doubly charged cations of importance in flames, plasma chemistry and physics and in the chemistry of the upper atmosphere of Planets. Furthermore, they are exotic species able to store a considerable amount of energy at a molecular level. This high energy content of several eV can be easily released as translational energy of the two fragment monocations generated by their Coulomb explosion. For such a reason, they were proposed as a new kind of alternative propellant. The present topic review paper reports on an overview of the main contributions made by the authors’ research groups in the generation and characterization of simple molecular dications during the last 40 years of coupling experimental and theoretical efforts.
Collapse
Affiliation(s)
- Stefano Falcinelli
- Department of Civil and Environmental Engineering, University of Perugia, Via G. Duranti 93, 06125 Perugia, Italy
- Correspondence: (S.F.); (M.R.); Tel.: +39-075-585-3862 (S.F.); +39-075-585-3858 (M.R.)
| | - Marzio Rosi
- Department of Civil and Environmental Engineering, University of Perugia, Via G. Duranti 93, 06125 Perugia, Italy
- SCITEC, CNR, Via Elce di Sotto 8, 06123 Perugia, Italy
- Correspondence: (S.F.); (M.R.); Tel.: +39-075-585-3862 (S.F.); +39-075-585-3858 (M.R.)
| |
Collapse
|
14
|
Electronic structure, spectroscopic properties, and bonding in a thermodynamically stable transition metal-containing diatomic dication: The case of ScS2+. Chem Phys Lett 2020. [DOI: 10.1016/j.cplett.2020.137706] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
15
|
Thermodynamic stability and spectroscopic properties of alkaline earth monobromides: The cases of MgBr2+ and BaBr2+. COMPUT THEOR CHEM 2020. [DOI: 10.1016/j.comptc.2020.112792] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
16
|
Armenta Butt S, Price SD. Bond-forming and electron-transfer reactivity between Ar2+ and O2. Phys Chem Chem Phys 2020; 22:8391-8400. [DOI: 10.1039/d0cp01194k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reactivity, energetics and dynamics of the bimolecular reactions between Ar2+ and O2 have been studied using a position sensitive coincidence methodology at a collision energy of 4.4 eV.
Collapse
|
17
|
Hogreve H. A theoretical study of the dication P22+. COMPUT THEOR CHEM 2019. [DOI: 10.1016/j.comptc.2019.05.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
18
|
de Melo GF, Ornellas FR. A high-level theoretical characterization of the electronic states and spectroscopic parameters of SrBr2+ and SrI2+, and thermodynamic stability in the family of strontium monohalides dications. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2019.03.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
19
|
Thermodynamic stability of diatomic dications of the families of alkaline earth oxides and hydrides: The cases of BaO2+ and BaH2+. Chem Phys 2019. [DOI: 10.1016/j.chemphys.2018.12.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
20
|
Hendaoui H, Ben Abdallah D, Jaidane N, Mogren Al Mogren M, Almenia S, Elmarghany A, Linguerri R, Hochlaf M. Multi reference studies of gas phase vanadium nitride di- and trications. Chem Phys 2019. [DOI: 10.1016/j.chemphys.2018.10.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
21
|
de Melo GF, Ornellas FR. The thermodynamic stability of strontium monohalides dications: A theoretical exploration of the electronic states and spectroscopic parameters of SrF2+ and SrCl2+. Chem Phys Lett 2018. [DOI: 10.1016/j.cplett.2018.09.055] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
22
|
Gonçalves dos Santos L, Franzreb K, Ornellas FR. Thermodynamically stable diatomic dications: The cases of SrO2+and SrH2+. J Chem Phys 2018; 148:124306. [DOI: 10.1063/1.5018590] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Levi Gonçalves dos Santos
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Perstes, 748, São Paulo 05508-000, Brazil
| | - Klaus Franzreb
- Chemistry Department, Arizona State University, Tempe, Arizona 85287, USA
| | - Fernando R. Ornellas
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Perstes, 748, São Paulo 05508-000, Brazil
| |
Collapse
|
23
|
Fantuzzi F, Cardozo TM, Nascimento MAC. On the metastability of doubly charged homonuclear diatomics. Phys Chem Chem Phys 2018; 19:19352-19359. [PMID: 28703821 DOI: 10.1039/c7cp02792c] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Generalized valence bond (GVB) and spin-coupled (SC) calculations were used in conjunction with the generalized product function energy partitioning (GPF-EP) method to describe the origin of metastability in doubly charged homonuclear dications. A model to describe the formation of metastable potential wells based on interference and quasi-classical effects is presented. The GPF-EP picture of dications is the result of polarization-aided strong covalent bonding surpassing Coulomb electrostatic repulsion. Important differences in the quasi-classical density profiles of He22+ and Ne22+ reveal the underlying mechanism that could lead to bound or unbound states. Finally, the nature of the chemical bond of N22+, O22+, and F22+ is described. The results suggest that the ground states of the mentioned dications are bounded and that the depth of the potential wells of these exotic species is related to the interference effect, in the same way as in previously studied neutral molecules.
Collapse
Affiliation(s)
- Felipe Fantuzzi
- Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-909, Brazil.
| | - Thiago M Cardozo
- Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-909, Brazil.
| | - Marco A C Nascimento
- Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ 21941-909, Brazil.
| |
Collapse
|
24
|
A novel analytical potential function for dicationic diatomic molecular systems based on deformed exponential function. J Mol Model 2017; 23:182. [PMID: 28488189 DOI: 10.1007/s00894-017-3339-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2016] [Accepted: 04/03/2017] [Indexed: 10/19/2022]
Abstract
In this paper, we propose a new alternative analytical function aiming to better describe the potential energy curves of the doubly charged diatomic molecules. To achieve this goal, we modified an existing potential function in the literature to describe dicationic diatomic molecules using the deformed exponential function. We generated the potential energy curve of the testing group of dicationic diatomic molecules [Formula: see text], BH2+, [Formula: see text] and NH2+ by means of the CCSD(T)/aug-cc-pVQZ level of theory. To validate this new function, we also calculated the spectroscopic constants and the rovibrational spectra for the electronic state [Formula: see text]of the [Formula: see text] and [Formula: see text] systems using the Dunham and discrete variable representation methods. For BH2+ and NH2+ molecules, despite exhibiting a local minimum in the potential energy curve, no vibrational levels are supported, so the spectroscopic constants for these poorly bound systems are invalidated. The fitting accuracy had a better performance over the original potential for describing dicationic diatomic systems, considering that the discrete variable representation method resulted in a similar vibrational structure described in the literature. This fact can be explained due to the deformed function's flexibility.
Collapse
|
25
|
Ackermann J, Hogreve H. Stability and spectral properties of the dication Ne2+2. Phys Chem Chem Phys 2017; 19:32433-32442. [DOI: 10.1039/c7cp07194a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Two different types of metastable states in Ne2+2 are predicted and possible decay transitions as well as the ensuing lifetimes and intensity distributions are studied.
Collapse
Affiliation(s)
- J. Ackermann
- Molecular Bioinformatics
- Johann Wolfgang Goethe Universität
- D-60325 Frankfurt
- Germany
| | - H. Hogreve
- IFISR – International Foundation for Independent Scientific Research
- New York
- USA
| |
Collapse
|
26
|
Hochlaf M. Advances in spectroscopy and dynamics of small and medium sized molecules and clusters. Phys Chem Chem Phys 2017; 19:21236-21261. [DOI: 10.1039/c7cp01980g] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Investigations of the spectroscopy and dynamics of small- and medium-sized molecules and clusters represent a hot topic in atmospheric chemistry, biology, physics, atto- and femto-chemistry and astrophysics.
Collapse
Affiliation(s)
- Majdi Hochlaf
- Université Paris-Est
- Laboratoire Modélisation et Simulation Multi Echelle
- MSME UMR 8208 CNRS
- 77454 Marne-la-Vallée
- France
| |
Collapse
|
27
|
Perera L, Beard WA, Pedersen LG, Wilson SH. Hiding in Plain Sight: The Bimetallic Magnesium Covalent Bond in Enzyme Active Sites. Inorg Chem 2016; 56:313-320. [PMID: 27976880 DOI: 10.1021/acs.inorgchem.6b02189] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The transfer of phosphate groups is an essential function of many intracellular biological enzymes. The transfer is in many cases facilitated by a protein scaffold involving two closely spaced magnesium "ions". It has long been a mystery how these "ions" can retain their closely spaced positions throughout enzymatic phosphate transfer: Coulomb's law would dictate large repulsive forces between these ions at the observed distances. Here we show, however, that the electron density can be borrowed from nearby electron-rich oxygens to populate a bonding molecular orbital that is largely localized between the magnesium "ions". The result is that the Mg-Mg core of these phosphate transfer enzymes is surprisingly similar to a metastable [Mg2]2+ ion in the gas phase, an ion that has been identified experimentally and studied with high-level quantum-mechanical calculations. This similarity is confirmed by comparative computations of the electron densities of [Mg2]2+ in the gas phase and the Mg-Mg core in the structures derived from QM/MM studies of high-resolution X-ray crystal structures. That there is a level of covalent bonding between the two Mg "ions" at the core of these enzymes is a novel concept that enables an improved vision of how these enzymes function at the molecular level. The concept is broader than magnesium-other biologically relevant metals (e.g., Mn and Zn) can also form similar stabilizing covalent Me-Me bonds in both organometallic and inorganic crystals.
Collapse
Affiliation(s)
- Lalith Perera
- Genome Integrity and Structural Biology Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health , P.O. Box 12233, Research Triangle Park, North Carolina 27709-2233, United States
| | - William A Beard
- Genome Integrity and Structural Biology Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health , P.O. Box 12233, Research Triangle Park, North Carolina 27709-2233, United States
| | - Lee G Pedersen
- Genome Integrity and Structural Biology Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health , P.O. Box 12233, Research Triangle Park, North Carolina 27709-2233, United States.,Department of Chemistry, University of North Carolina at Chapel Hill , P.O. Box 3290, Chapel Hill, North Carolina 27517, United States
| | - Samuel H Wilson
- Genome Integrity and Structural Biology Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health , P.O. Box 12233, Research Triangle Park, North Carolina 27709-2233, United States
| |
Collapse
|
28
|
Hogreve H. Metastable homonuclear diatomic trications X23+ for elements X from the first three rows of the periodic table. COMPUT THEOR CHEM 2016. [DOI: 10.1016/j.comptc.2016.08.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
29
|
Sghaier O, Abdallah HH, Abdullah HY, Jaidane NE, Al Mogren MM, Hochlaf M. Theoretical investigation of the long-lived metastable AlO2+ dication in gas phase. Chem Phys 2016. [DOI: 10.1016/j.chemphys.2016.08.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
30
|
|
31
|
Eland J, Plogmaker S, Lablanquie P, Penent F, Palaudoux J, Nicolas C, Robert E, Miron C, Feifel R. Wide range double photoionisation spectra of N2 and CO2. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2015.12.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
32
|
Gonçalves dos Santos L, de Oliveira-Filho AGS, Ornellas FR. The electronic states of TeH+: A theoretical contribution. J Chem Phys 2015; 142:024316. [DOI: 10.1063/1.4905378] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Affiliation(s)
- Levi Gonçalves dos Santos
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, São Paulo, São Paulo 05508-000, Brazil
| | - Antonio Gustavo S. de Oliveira-Filho
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, São Paulo, São Paulo 05508-000, Brazil
| | - Fernando R. Ornellas
- Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, São Paulo, São Paulo 05508-000, Brazil
| |
Collapse
|
33
|
Noorisafa Z, Sabzyan H, Keshavarz E. Metastable excited states of OBr2- and OCl2- dianions. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 132:672-677. [PMID: 24907970 DOI: 10.1016/j.saa.2014.05.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2013] [Revised: 02/21/2014] [Accepted: 05/08/2014] [Indexed: 06/03/2023]
Abstract
Electronic stabilities, structures, properties, and spectroscopic constants of the halogen oxide dianions OBr2- and OCl2- and their singly charged anions which are of astrophysical and laboratory interests have been studied. The X2Σ states of OBr2- and OCl2- are metastable with PECs having smooth wells with minima located at R=1.859 Å and 1.776 Å, and Coulomb barriers of 40402.54987 cm(-1) and 43746.63462 cm(-1) heights located at RRCB=2.100 Å and 1.922 Å, respectively, both without any vibrational states. While, the B2Σ state of OBr2- and the A2Σ state of OCl2- are metastable with PECs having wells deep enough to suite several bound states, with minima located at Re=1.773 Å and 1.6430 Å, and Coulomb barriers of 191437.45813 cm(-1) and 180550.70294 cm(-1) heights located at RRCB=2.658 Å and 2.4480 Å, with De=1.26470 eV and 1.60837 eV, respectively. The OBr- and OCl- singly charged anions are stable in their ground states. Based on the calculated Frank-Condon factors, it is concluded that metastable excited state OBr2- and OCl2- dianions and ground state OBr- and OCl- singly charged anions can be formed via electron capture processes.
Collapse
Affiliation(s)
- Zeinab Noorisafa
- Department of Chemistry, University of Isfahan, Isfahan, 81746 73441, Islamic Republic of Iran
| | - Hassan Sabzyan
- Department of Chemistry, University of Isfahan, Isfahan, 81746 73441, Islamic Republic of Iran.
| | - Elham Keshavarz
- Department of Chemistry, University of Isfahan, Isfahan, 81746 73441, Islamic Republic of Iran
| |
Collapse
|
34
|
Sabor S, Benjelloun AT, Al Mogren MM, Hochlaf M. Characterization of gas phase WC²⁺: a thermodynamically stable carbide dication. Phys Chem Chem Phys 2014; 16:21356-62. [PMID: 25179836 DOI: 10.1039/c4cp03136a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Using an ab initio methodology, we performed a detailed theoretical study of the gas phase WC(2+) dication. These calculations were done using a multiconfigurational method in connection with a large basis set, where relativistic effects were taken into account. This dication is identified here as the first thermochemically stable doubly charged diatomic carbide in the gas phase. Our work hence confirms the stability of this dication in the gas phase and its earlier observations by atom probe mass spectrometry. Our calculations show that the shape of the potential energy curves of its lowest electronic states changes drastically upon consideration of relativistic effects. For instance, the electronic ground state possesses a Morse-like potential without spin-orbit that evolves to the usual volcanic behavior, and with a columbic 1/R evolution at large internuclear separation after inclusion of spin-orbit. We predict a set of thermochemical and spectroscopic data for this molecular species.
Collapse
Affiliation(s)
- S Sabor
- Université Paris-Est, Laboratoire Modélisation et Simulation Multi Echelle, MSME UMR 8208 CNRS, 5 bd Descartes, 77454 Marne-la-Vallée, France.
| | | | | | | |
Collapse
|