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Gamallo P, González M, Petrongolo C. Quantum Dynamics of Nonadiabatic Renner-Teller Effects in Atom + Diatom Collisions. J Phys Chem A 2021; 125:6637-6652. [PMID: 34319740 DOI: 10.1021/acs.jpca.1c04654] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We review the quantum nonadiabatic dynamics of atom + diatom collisions due to the Renner-Teller (RT) effect, i.e., to the Hamiltonian operators that contain the total spinless electronic angular momentum L̂. As is well-known, this rovibronic effect is large near collinear geometries when at least one of the interacting states is doubly degenerate. In general, this occurs in insertion reactions and at short-range, where the potential wells exhibit deep minima and support metastable complexes. Initial-state-resolved reaction probabilities, integral cross sections, and thermal rate constants are calculated via the real wavepacket method, solving the equation of motion with an approximated or with an exact spinless RT Hamiltonian. We present the dynamics of 10 single-channel or multichannel reactions showing how RT effects depend on the product channels and comparing with the Born-Oppenheimer (BO) approximation or coexisting conical-intersection (CI) interactions. RT effects not only can significantly modify the adiabatic dynamics or correct purely CI results, but also they can be very important in opening collision channels which are closed at the BO or CI level, as in electronic-quenching reactions. In the OH(A2Σ+) + Kr electronic quenching, where both nonadiabatic effects (CI and RT) coexist, they are in competition because CI dominates the reactivity but RT couplings reduce the large CI cross section and open a CI-forbidden evolution toward products, so that CI + RT quantum results are in good agreement with experimental or semiclassical findings. The different roles of these couplings are due to the unlike nuclear geometries where they are large: rather far from or near to linearity for CI or RT, respectively. The OH(A2Σ+) + Kr electronic quenching was investigated with the exact RT Hamiltonian, validating the approximated one, which was employed for all other collisions.
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Affiliation(s)
- Pablo Gamallo
- Departament de Ciència dels Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, c/Martí i Franquès 1-11, 08028 Barcelona, Spain
| | - Miguel González
- Departament de Ciència dels Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB), Universitat de Barcelona, c/Martí i Franquès 1-11, 08028 Barcelona, Spain
| | - Carlo Petrongolo
- Istituto per i Processi Chimico Fisici, Consiglio Nazionale delle Ricerche, Via G. Moruzzi 1, 56124 Pisa, Italy
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Gamallo P, Zanchet A, Aoiz FJ, Petrongolo C. Non-adiabatic quantum dynamics of the electronic quenching OH(A2Σ+) + Kr. Phys Chem Chem Phys 2020; 22:17091-17105. [DOI: 10.1039/d0cp02512g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The quantum dynamics is investigated in full dimensionality, using three PESs and all the non-adiabatic couplings of a total Hamiltonian.
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Affiliation(s)
- Pablo Gamallo
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional (IQTCUB)
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| | - Alexandre Zanchet
- Departamento de Química Física
- Facultad de Química
- Universidad Complutense
- 28040 Madrid
- Spain
| | - F. Javier Aoiz
- Departamento de Química Física
- Facultad de Química
- Universidad Complutense
- 28040 Madrid
- Spain
| | - Carlo Petrongolo
- Istituto per i Processi Chimico Fisici
- Consiglio Nazionale delle Ricerche
- 56124 Pisa
- Italy
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De Fazio D, Aguado A, Petrongolo C. Non-adiabatic Quantum Dynamics of the Dissociative Charge Transfer He ++H 2 → He+H+H . Front Chem 2019; 7:249. [PMID: 31041310 PMCID: PMC6477054 DOI: 10.3389/fchem.2019.00249] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 03/27/2019] [Indexed: 11/27/2022] Open
Abstract
We present the non-adiabatic, conical-intersection quantum dynamics of the title collision where reactants and products are in the ground electronic states. Initial-state-resolved reaction probabilities, total integral cross sections, and rate constants of two H2 vibrational states, v0 = 0 and 1, in the ground rotational state (j0 = 0) are obtained at collision energies Ecoll ≤ 3 eV. We employ the lowest two excited diabatic electronic states of HeH2+ and their electronic coupling, a coupled-channel time-dependent real wavepacket method, and a flux analysis. Both probabilities and cross sections present a few groups of resonances at low Ecoll, whose amplitudes decrease with the energy, due to an ion-induced dipole interaction in the entrance channel. At higher Ecoll, reaction probabilities and cross sections increase monotonically up to 3 eV, remaining however quite small. When H2 is in the v0 = 1 state, the reactivity increases by ~2 orders of magnitude at the lowest energies and by ~1 order at the highest ones. Initial-state resolved rate constants at room temperature are equal to 1.74 × 10−14 and to 1.98 × 10−12 cm3s−1 at v0 = 0 and 1, respectively. Test calculations for H2 at j0 = 1 show that the probabilities can be enhanced by a factor of ~1/3, that is ortho-H2 seems ~4 times more reactive than para-H2.
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Affiliation(s)
- Dario De Fazio
- Consiglio Nazionale delle Ricerche, Istituto di Struttura della Materia, Rome, Italy
| | - Alfredo Aguado
- Departamento de Química Física Aplicada, Facultad de Ciencias, Universidad Autónoma de Madrid, Madrid, Spain
| | - Carlo Petrongolo
- Consiglio Nazionale delle Ricerche, Istituto per i Processi Chimico Fisici, Pisa, Italy
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Gamallo P, Akpinar S, Defazio P, Petrongolo C. Nonadiabatic Renner–Teller quantum dynamics of OH(X2Π) + H+ reactive collisions. Phys Chem Chem Phys 2017; 19:4454-4461. [DOI: 10.1039/c6cp07756k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Following previous studies on the O(3P) + H2+(X2Σg+) collisions, we present the nonadiabatic quantum dynamics of the reactions OH(X2Π) + H′+ → OH′(X2Π) + H+, exchange (e), → OH+(X3Σ−) + H′(2S), quenching (q), and → OH′+(X3Σ−) + H(2S), exchange-quenching (eq).
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Affiliation(s)
- Pablo Gamallo
- Departament de Ciència de Materials i Química Física & Institut de Química Teòrica i Computacional
- Universitat de Barcelona
- C/Martí i Franquès 1
- 08028 Barcelona
- Spain
| | - Sinan Akpinar
- Department of Physics
- Firat University
- 23169 Elazig
- Turkey
| | - Paolo Defazio
- Dipartimento di Biotecnologie
- Chimica
- e Farmacia
- Università di Siena
- Via A. Moro 2
| | - Carlo Petrongolo
- Istituto per i Processi Chimico Fisici
- Consiglio Nazionale delle Ricerche
- Via G. Moruzzi 1
- 56124 Pisa
- Italy
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Gamallo P, Akpinar S, Defazio P, Petrongolo C. Born–Oppenheimer and Renner–Teller Quantum Dynamics of CH(X2Π) + D(2S) Reactions on Three CHD Potential Surfaces. J Phys Chem A 2015; 119:11254-64. [DOI: 10.1021/acs.jpca.5b08891] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Pablo Gamallo
- Departament
de Quı́mica Fı́sica,
Institut de Química Teòrica i Computacional, Universitat de Barcelona, C/Martí i Franquès 1, 08028 Barcelona, Spain
| | - Sinan Akpinar
- Department
of Physics, Firat University, 23169 Elazig, Turkey
| | - Paolo Defazio
- Dipartimento
di Biotecnologie, Chimica, e Farmacia, Università di Siena, Via A. Moro
2, 53100 Siena, Italy
| | - Carlo Petrongolo
- Istituto
per i Processi Chimico Fisici, Consiglio Nazionale delle Ricerche, Via G. Moruzzi 1, 56124 Pisa, Italy
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Gamallo P, Defazio P, González M, Paniagua M, Petrongolo C. Born–Oppenheimer and Renner–Teller coupled-channel quantum reaction dynamics of O(3P) + H2+(X2Σg+) collisions. Phys Chem Chem Phys 2015; 17:23392-402. [DOI: 10.1039/c5cp03451e] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We present Born–Oppenheimer (BO) and Renner–Teller (RT) time dependent quantum dynamics studies of the reactions O(3P) + H2+(X2Σg+) → OH+(X3Σ−) + H(2S) and OH(X2Π) + H+.
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Affiliation(s)
- Pablo Gamallo
- Departament de Química Física i Institut de Química Teòrica i Computacional
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| | - Paolo Defazio
- Dipartimento di Biotecnologie
- Chimica
- e Farmacia
- Università di Siena
- 53100 Siena
| | - Miguel González
- Departament de Química Física i Institut de Química Teòrica i Computacional
- Universitat de Barcelona
- 08028 Barcelona
- Spain
| | - Miguel Paniagua
- Departamento de Química Física Aplicada
- Universidad Autónoma de Madrid
- 28049 Cantoblanco
- Spain
| | - Carlo Petrongolo
- Istituto per i Processi Chimico Fisici
- Consiglio Nazionale delle Ricerche
- 56124 Pisa
- Italy
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Lin GSM, Zhou L, Xie D. Theoretical Study of the State-to-State Photodissociation Dynamics of the Vibrationally Excited Water Molecule in the B Band. J Phys Chem A 2014; 118:9220-7. [DOI: 10.1021/jp503062s] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Guang-Shuang-Mu Lin
- Institute of Theoretical and Computational Chemistry, Key Laboratory of Mesoscopic Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Linsen Zhou
- Institute of Theoretical and Computational Chemistry, Key Laboratory of Mesoscopic Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Daiqian Xie
- Institute of Theoretical and Computational Chemistry, Key Laboratory of Mesoscopic Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, Jiangsu 210093, China
- Synergetic
Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
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Yuan J, Cheng D, Sun Z, Chen M. Time-dependent quantum wave packet and quasiclassical trajectory studies of the Au(2S) + H2(X1∑+g) → AuH(X1∑+g) + H(2S) reaction. Mol Phys 2014. [DOI: 10.1080/00268976.2014.920113] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Gamallo P, Akpinar S, Defazio P, Petrongolo C. Quantum Dynamics of the Reaction H(2S) + HeH+(X1Σ+) → H2+(X2Σg+) + He(1S) from Cold to Hyperthermal Energies: Time-Dependent Wavepacket Study and Comparison with Time-Independent Calculations. J Phys Chem A 2014; 118:6451-6. [DOI: 10.1021/jp5023289] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Pablo Gamallo
- Departament
de Quı́mica Fı́sica, Institut
de Quı́mica Teòrica i Computacional, Universitat de Barcelona, C/Martı́ i Franquès 1, 08028 Barcelona, Spain
| | - Sinan Akpinar
- Department
of Physics, Firat University, 23169 Elazig, Turkey
| | - Paolo Defazio
- Dipartimento
di Biotecnologie, Chimica, e Farmacia, Università di Siena, Via A. Moro
2, 53100 Siena, Italy
| | - Carlo Petrongolo
- Istituto per i
Processi Chimico-Fisici, Consiglio Nazionale delle Ricerche, Via G. Moruzzi 1, 56124 Pisa, Italy
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