1
|
Crisci L, Di Grande S, Cavallotti C, Barone V. Toward an Accurate Black-Box Tool for the Kinetics of Gas-Phase Reactions Involving Barrier-less Elementary Steps. J Chem Theory Comput 2023; 19:7626-7639. [PMID: 37880932 PMCID: PMC10653117 DOI: 10.1021/acs.jctc.3c00857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 10/06/2023] [Accepted: 10/13/2023] [Indexed: 10/27/2023]
Abstract
An enhanced computational protocol has been devised for the accurate characterization of gas-phase barrier-less reactions in the framework of the reaction-path (RP) and variable reaction coordinate variational transition-state theory. In particular, the synergistic combination of density functional theory and Monte Carlo sampling to optimize reactive fluxes led to a reliable yet effective computational workflow. A black-box strategy has been developed for selecting the most suited density functional with reference to a high-level one-dimensional reference potential. At the same time, different descriptions of hindered rotations are automatically selected, depending on the corresponding harmonic frequencies along the RP. The performance of the new tool is investigated by means of two prototypical reactions involving different degrees of static and dynamic correlation, namely, H2S + Cl and CH3 + CH3. The remarkable agreement of the computed kinetic parameters with the available experimental data confirms the accuracy and robustness of the proposed approach. Together with their intrinsic interest, these results also pave the way toward systematic investigations of gas-phase reactions involving barrier-less elementary steps by a reliable, user-friendly tool, which can be confidently used also by nonspecialists.
Collapse
Affiliation(s)
- Luigi Crisci
- Scuola
Normale Superiore di Pisa, Piazza dei Cavalieri 7, I-56126 Pisa, Italy
- Department
of Chemical Sciences, University of Napoli
Federico II, Complesso Universitario di M.S. Angelo, via Cintia 21, I-80126 Napoli, Italy
| | - Silvia Di Grande
- Scuola
Normale Superiore di Pisa, Piazza dei Cavalieri 7, I-56126 Pisa, Italy
- Scuola
Superiore Meridionale, Largo San Marcellino 10, I-80138 Napoli, Italy
| | - Carlo Cavallotti
- Department
of Chemistry, Materials and Chemical Engineering “G. Natta”, Politecnico di Milano, I-20131 Milano, Italy
| | - Vincenzo Barone
- Scuola
Normale Superiore di Pisa, Piazza dei Cavalieri 7, I-56126 Pisa, Italy
| |
Collapse
|
2
|
Nazari A, Saheb V. Theoretical kinetics studies on the temperature and pressure dependence of the reaction of ammonia with the Criegee intermediate CH2OO. Theor Chem Acc 2022. [DOI: 10.1007/s00214-022-02930-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
3
|
Barbatti M. Defining the temperature of an isolated molecule. J Chem Phys 2022; 156:204304. [DOI: 10.1063/5.0090205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The microcanonical temperature of an isolated molecule is derived in terms of Boltzmann and Gibbs volume entropies within the quantum harmonic vibrational and equivalent degenerated model approximations. The effects of the entropy functional choice and various approximations are examined. The difference between Boltzmann and Gibbs volume temperatures is negligible for molecules bigger than ten atoms. However, it is significant for smaller systems, opening a way to probe them experimentally. A simple, analytical expression of the temperature as a function of the vibrational energy is provided, allowing predictions with a ±3% margin of error compared to the exact harmonic estimate. The microcanonical temperature is discussed and exemplified with polycyclic aromatic hydrocarbon molecules and other molecules of astrophysical interest.
Collapse
Affiliation(s)
- Mario Barbatti
- Aix Marseille University, CNRS, ICR, Marseille, France and Institut Universitaire de France, 75231 Paris, France
| |
Collapse
|
4
|
Nguyen TL, Perera A. Reaction of Methylidyne with Ethane: The C-C Insertion Is Unimportant. J Phys Chem A 2022; 126:1966-1972. [PMID: 35302775 DOI: 10.1021/acs.jpca.2c00735] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
High-accuracy coupled-cluster calculations in combination with the E,J-resolved master-equation analysis are used to study the reaction mechanism and kinetics of methylidyne with ethane. This reaction plays an important role in the combustion of hydrocarbon fuels and in interstellar chemistry. Two distinct mechanisms, the C-C and the C-H insertions of CH in C2H6, are characterized. The C-C insertion pathway is identified to have a large barrier of 34.5 kcal mol-1 and hence plays no significant role in kinetics. The C-H insertion pathway is found to have no barrier, leading to a highly vibrationally excited n-C3H7 radical, which rapidly dissociates (within 50 ps) to yield CH3 + C2H4 and H + C3H6 in a roughly 7:3 ratio. These findings are in good agreement with an experimental result that indicates that about 20% of the reaction goes to H + C3H6. The reaction of the electronically excited quartet state of the CH radical with C2H6 is examined for the first time and found to proceed as a direct H-abstraction via a small barrier of 0.4 kcal mol-1 to yield triplet CH2 and C2H5. The reaction on the quartet state surface is negligibly slow at low temperatures characteristic of interstellar environments but becomes important at high combustion temperatures.
Collapse
Affiliation(s)
- Thanh Lam Nguyen
- Quantum Theory Project, Departments of Chemistry and Physics, University of Florida, Gainesville, Florida 32611, United States
| | - Ajith Perera
- Quantum Theory Project, Departments of Chemistry and Physics, University of Florida, Gainesville, Florida 32611, United States
| |
Collapse
|
5
|
Exploring the mechanism and kinetics of the reaction of carbon disulfide, CS2, with the Criegee intermediates CH2OO and (CH3)2COO. COMPUT THEOR CHEM 2022. [DOI: 10.1016/j.comptc.2021.113529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
6
|
Nguyen TL, Perera A, Peeters J. High-accuracy first-principles-based rate coefficients for the reaction of OH and CH 3OOH. Phys Chem Chem Phys 2022; 24:26684-26691. [DOI: 10.1039/d2cp03919b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The ˙OH-initiated oxidation of methyl hydroperoxide was theoretically characterized using high-accuracy composite amHEAT-345(Q) coupled-cluster calculations followed by a two-dimensional E,J resolved master equation analysis.
Collapse
Affiliation(s)
- Thanh Lam Nguyen
- Quantum Theory Project, Departments of Chemistry and Physics, University of Florida, Gainesville, FL, 32611, USA
| | - Ajith Perera
- Quantum Theory Project, Departments of Chemistry and Physics, University of Florida, Gainesville, FL, 32611, USA
| | - Jozef Peeters
- Department of Chemistry, University of Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
| |
Collapse
|
7
|
Nguyen TL, Peeters J. The CH(X 2Π) + H 2O reaction: two transition state kinetics. Phys Chem Chem Phys 2021; 23:16142-16149. [PMID: 34296725 DOI: 10.1039/d1cp02234b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of ground state methylidyne (CH) with water vapor (H2O) is theoretically re-investigated using high-level coupled cluster computations in combination with semi-classical transition state theory (SCTST) and two-dimensional master equation simulations. Insertion of CH into a H-O bond of H2O over a submerged barrier via a well-skipping mechanism yielding solely H and CH2O is characterized. The reaction kinetics is effectively determined by the formation of a pre-reaction van der Waals complex (PRC, HC-OH2) and its subsequent isomerization to activated CH2OH in competition with PRC re-dissociation. The tunneling effects are found to be minor, while variational effects in the PRC → CH2OH step are negligible. The calculated rate coefficient k(T) is nearly pressure-independent, but strongly depends on temperature with pronounced down-up behavior: a high value of 2 × 10-10 cm3 s-1 at 50 K, followed by a fairly steep decrease down to 8 × 10-12 cm3 s-1 at 900 K, but increasing again to 5 × 10-11 cm3 s-1 at 3500 K. Over the T-range of this work, k(T) can be expressed as: k(T, P = 0) = 2.31 × 10-11 (T/300 K)-1.615 exp(-38.45/T) cm3 s-1 for T = 50-400 K k(T, P = 0) = 1.15 × 10-12 (T/300 K)0.8637 exp(892.6/T) cm3 s-1 for T = 400-1000 K k(T, P = 0) = 4.57 × 10-15 (T/300 K)3.375 exp(3477.4/T) cm3 s-1 for T = 1000-3500 K.
Collapse
Affiliation(s)
- Thanh Lam Nguyen
- Quantum Theory Project, Department of Chemistry and Physics, University of Florida, Gainesville, FL 32611, USA.
| | | |
Collapse
|
8
|
Saheb V. Detailed theoretical kinetics studies on the product formation from the reaction of the criegee intermediate CH2OO with H2O molecule. Theor Chem Acc 2021. [DOI: 10.1007/s00214-021-02779-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
9
|
A never-ending story in the sky: The secrets of chemical evolution. Phys Life Rev 2020; 32:59-94. [DOI: 10.1016/j.plrev.2019.07.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2019] [Revised: 06/26/2019] [Accepted: 07/02/2019] [Indexed: 01/13/2023]
|
10
|
Désesquelles P, Van-Oanh NT, Thomas S, Domin D. Statistical molecular fragmentation: which parameters influence the branching ratios? Phys Chem Chem Phys 2020; 22:3160-3172. [DOI: 10.1039/c9cp05095g] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Our recently developed statistical model for molecular fragmentation (SMF) is used to study the decomposition of propane and to predict thermodynamically controlled yields of products as a function of excitation energy deposited into propane.
Collapse
Affiliation(s)
- Pierre Désesquelles
- Laboratoire de Physique des Gaz et des Plasmas
- Univ. Paris-Sud
- CNRS
- Université Paris-Saclay
- Orsay
| | - Nguyen-Thi Van-Oanh
- Laboratoire de Chimie Physique
- CNRS
- Univ. Paris-Sud
- Université Paris-Saclay
- Orsay
| | - Sébastien Thomas
- Laboratoire de Physique des Gaz et des Plasmas
- Univ. Paris-Sud
- CNRS
- Université Paris-Saclay
- Orsay
| | - Dominik Domin
- Faculty of Biotechnology
- Chemistry and Environmental Engineering
- PHENIKAA University
- Vietnam
- PHENIKAA Institute for Advanced Study (PIAS)
| |
Collapse
|
11
|
A Modern-Fortran Program for Chemical Kinetics on Top of Anharmonic Vibrational Calculations. ACTA ACUST UNITED AC 2019. [DOI: 10.1007/978-3-030-24311-1_29] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
|
12
|
Shan X, Burd TAH, Clary DC. New Developments in Semiclassical Transition-State Theory. J Phys Chem A 2019; 123:4639-4657. [DOI: 10.1021/acs.jpca.9b01987] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xiao Shan
- Physical and Theoretical Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QZ, United Kingdom
| | - Timothy A. H. Burd
- Physical and Theoretical Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QZ, United Kingdom
| | - David C. Clary
- Physical and Theoretical Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QZ, United Kingdom
| |
Collapse
|
13
|
Kinetics and Mechanisms of the Hydrogen Abstraction Reactions of CF3CF2CH2CH2F and CF3CH2CH2CF3 with Hydroxyl Radicals: Theoretical Studies. J Fluor Chem 2019. [DOI: 10.1016/j.jfluchem.2018.11.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
14
|
Pal J, Subramanian R. Theoretical investigation of N ( 2D) + HOX (Cl, Br) reaction. Mol Phys 2019. [DOI: 10.1080/00268976.2018.1508779] [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]
Affiliation(s)
- Jagannath Pal
- Department of Chemistry, Indian Institute of Technology Patna, Patna, Bihar, India
| | - Ranga Subramanian
- Department of Chemistry, Indian Institute of Technology Patna, Patna, Bihar, India
| |
Collapse
|
15
|
Mackie CJ, Chen T, Candian A, Lee TJ, Tielens AGGM. Fully anharmonic infrared cascade spectra of polycyclic aromatic hydrocarbons. J Chem Phys 2018; 149:134302. [DOI: 10.1063/1.5038725] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Cameron J. Mackie
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
- Leiden Observatory, Leiden University, P.O. Box 9513, 2300 RA Leiden, The Netherlands
| | - Tao Chen
- Leiden Observatory, Leiden University, P.O. Box 9513, 2300 RA Leiden, The Netherlands
- Department of Theoretical Chemistry and Biology, School of Biotechnology, Royal Institute of Technology, 10691 Stockholm, Sweden
| | - Alessandra Candian
- Leiden Observatory, Leiden University, P.O. Box 9513, 2300 RA Leiden, The Netherlands
| | - Timothy J. Lee
- NASA Ames Research Center, Moffett Field, California 94035-1000, USA
| | | |
Collapse
|
16
|
Mai TVT, Duong MV, Nguyen HT, Lin KC, Huynh LK. Ab initio chemical kinetics of the CH2OO + C2F4 reaction. Chem Phys Lett 2018. [DOI: 10.1016/j.cplett.2018.06.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
17
|
Saheb V, Zokaie M. Multichannel Gas-Phase Unimolecular Decomposition of Acetone: Theoretical Kinetic Studies. J Phys Chem A 2018; 122:5895-5904. [DOI: 10.1021/acs.jpca.8b02423] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Vahid Saheb
- Department of Chemistry, Shahid Bahonar University of Kerman, Kerman 76169-14111, Iran
| | - Meymanat Zokaie
- Department of Chemistry, Shahid Bahonar University of Kerman, Kerman 76169-14111, Iran
| |
Collapse
|
18
|
Lara-Cruz GA, Moyano GE. OCS isomerization and dissociation kinetics from statistical models. Theor Chem Acc 2018. [DOI: 10.1007/s00214-018-2253-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
19
|
Shan X, Clary DC. Application of one-dimensional semiclassical transition state theory to the CH 3OH + H ⇌ CH 2OH/CH 3O + H 2 reactions. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2018; 376:rsta.2017.0147. [PMID: 29431675 PMCID: PMC5805916 DOI: 10.1098/rsta.2017.0147] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 10/31/2017] [Indexed: 05/12/2023]
Abstract
The rate constants of the two branches of H-abstractions from CH3OH by the H-atom and the corresponding reactions in the reverse direction are calculated using the one-dimensional semiclassical transition state theory (1D SCTST). In this method, only the reaction mode vibration of the transition state (TS) is treated anharmonically, while the remaining internal degrees of freedom are treated as they would have been in a standard TS theory calculation. A total of eight ab initio single-point energy calculations are performed in addition to the computational cost of a standard TS theory calculation. This allows a second-order Richardson extrapolation method to be employed to improve the numerical estimation of the third- and fourth-order derivatives, which in turn are used in the calculation of the anharmonic constant. Hindered-rotor (HR) vibrations are identified in the equilibrium states of CH3OH and CH2OH, and the TSs of the reactions. The partition function of the HRs are calculated using both a simple harmonic oscillator model and a more sophisticated one-dimensional torsional eigenvalue summation (1D TES) method. The 1D TES method can be easily adapted in 1D SCTST computation. The resulting 1D SCTST with 1D TES rate constants show good agreement to previous theoretical and experimental works. The effects of the HR on rate constants for different reactions are also investigated.This article is part of the theme issue 'Modern theoretical chemistry'.
Collapse
Affiliation(s)
- Xiao Shan
- Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QZ, UK
| | - David C Clary
- Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QZ, UK
| |
Collapse
|
20
|
Saheb V, Maleki S. Ab Initio Theoretical Studies on the Kinetics of Hydrogen Abstraction Type Reactions of Hydroxyl Radicals with CH3CCl2F and CH3CClF2. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2018. [DOI: 10.1134/s0036024418030329] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
21
|
Saheb V, Hashemi SR, Hosseini SMA. Theoretical Studies on the Kinetics of Multi-Channel Gas-Phase Unimolecular Decomposition of Acetaldehyde. J Phys Chem A 2017; 121:6887-6895. [PMID: 28825298 DOI: 10.1021/acs.jpca.7b04771] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Theoretical kinetic studies are performed on the multichannel thermal decomposition of acetaldehyde. The geometries of the stationary points on the potential energy surface of the reaction are optimized at the MP2(full)/6-311++G(2d,2p) level of theory. More accurate energies are obtained by single point energy calculations at the CCSD(T,full)/augh-cc-pVTZ+2df, CBS-Q and G4 levels of theory. Here, by application of steady-state approximation to the thermally activated species CH3CHO* and CH2CHOH* and performance of statistical mechanical manipulations, expressions for the rate constants for different product channels are derived. Special attempts are made to compute accurate energy-specific rate coefficients for different channels by using semiclassical transition state theory. It is found that the isomerization of CH3CHO to the enol-form CH2CHOH plays a significant role in the unimolecular reaction of CH3CHO. The possible products of the reaction are formed via unimolecular decomposition of CH3CHO and CH2CHOH. The computed rate coefficients reveal that the dominant channel at low temperatures and high pressures is the formation of CH2CHOH due to the low barrier height for CH3CHO → CH2CHOH isomerization process. However, at high temperatures, the product channel CH3 + CHO becomes dominant.
Collapse
Affiliation(s)
- Vahid Saheb
- Department of Chemistry, Shahid Bahonar University of Kerman , Kerman 76169, Iran
| | - S Rasoul Hashemi
- Department of Chemistry, Shahid Bahonar University of Kerman , Kerman 76169, Iran
| | | |
Collapse
|
22
|
Shan X, Vincent JC, Kirkpatrick S, Walker MD, Sambrook MR, Clary DC. A Combined Theoretical and Experimental Study of Sarin (GB) Decomposition at High Temperatures. J Phys Chem A 2017; 121:6200-6210. [PMID: 28704051 DOI: 10.1021/acs.jpca.7b04282] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Theoretical and experimental results are presented for the pyrolytic decomposition of the nerve agent sarin (GB) in the gas phase. High-level quantum chemistry calculations are performed together with a semiclassical transition-state theory for describing quantum mechanical tunneling. The experimental and theoretical results for the temperature dependence of the survival times show very good agreement, as does the calculated and measured activation energy for thermal decomposition. The combined results suggest that the thermal decomposition of GB, for temperature ranging from 350 to 500 °C, goes through a pericyclic reaction mechanism with a transition state consisting of a six-membered ring structure.
Collapse
Affiliation(s)
- Xiao Shan
- Physical and Theoretical Chemistry Laboratory, Department of Chemistry, University of Oxford , South Parks Road, Oxford OX1 3QZ, United Kingdom
| | - Jack C Vincent
- CBR Division, DSTL Porton Down , Salisbury SP4 0JQ, United Kingdom
| | - Sue Kirkpatrick
- CBR Division, DSTL Porton Down , Salisbury SP4 0JQ, United Kingdom
| | - Maurice D Walker
- CBR Division, DSTL Porton Down , Salisbury SP4 0JQ, United Kingdom
| | - Mark R Sambrook
- CBR Division, DSTL Porton Down , Salisbury SP4 0JQ, United Kingdom
| | - David C Clary
- Physical and Theoretical Chemistry Laboratory, Department of Chemistry, University of Oxford , South Parks Road, Oxford OX1 3QZ, United Kingdom
| |
Collapse
|
23
|
Smith MC, Chao W, Kumar M, Francisco JS, Takahashi K, Lin JJM. Temperature-Dependent Rate Coefficients for the Reaction of CH2OO with Hydrogen Sulfide. J Phys Chem A 2017; 121:938-945. [DOI: 10.1021/acs.jpca.6b12303] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mica C. Smith
- Institute
of Atomic and Molecular Science, Academia Sinica, Taipei 10617, Taiwan
| | - Wen Chao
- Institute
of Atomic and Molecular Science, Academia Sinica, Taipei 10617, Taiwan
- Department
of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| | - Manoj Kumar
- Department
of Chemistry, University of Nebraska—Lincoln, Lincoln, Nebraska 68588, United States
| | - Joseph S. Francisco
- Department
of Chemistry, University of Nebraska—Lincoln, Lincoln, Nebraska 68588, United States
| | - Kaito Takahashi
- Institute
of Atomic and Molecular Science, Academia Sinica, Taipei 10617, Taiwan
| | - Jim Jr-Min Lin
- Institute
of Atomic and Molecular Science, Academia Sinica, Taipei 10617, Taiwan
- Department
of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| |
Collapse
|
24
|
Yin C, Takahashi K. How does substitution affect the unimolecular reaction rates of Criegee intermediates? Phys Chem Chem Phys 2017; 19:12075-12084. [DOI: 10.1039/c7cp01091e] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Unimolecular reaction rates of Criegee intermediates show substitution effect.
Collapse
Affiliation(s)
- Cangtao Yin
- Institute of Atomic and Molecular Sciences
- Academia Sinica
- Taipei
- Taiwan
| | - Kaito Takahashi
- Institute of Atomic and Molecular Sciences
- Academia Sinica
- Taipei
- Taiwan
| |
Collapse
|
25
|
Vazart F, Calderini D, Puzzarini C, Skouteris D, Barone V. State-of-the-Art Thermochemical and Kinetic Computations for Astrochemical Complex Organic Molecules: Formamide Formation in Cold Interstellar Clouds as a Case Study. J Chem Theory Comput 2016; 12:5385-5397. [PMID: 27689448 PMCID: PMC5856337 DOI: 10.1021/acs.jctc.6b00379] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We describe an integrated computational strategy aimed at providing reliable thermochemical and kinetic information on the formation processes of astrochemical complex organic molecules. The approach involves state-of-the-art quantum-mechanical computations, second-order vibrational perturbation theory, and kinetic models based on capture and transition state theory together with the master equation approach. Notably, tunneling, quantum reflection, and leading anharmonic contributions are accounted for in our model. Formamide has been selected as a case study in view of its interest as a precursor in the abiotic amino acid synthesis. After validation of the level of theory chosen for describing the potential energy surface, we have investigated several pathways of the OH + CH2NH and NH2 + H2CO reaction channels. Our results show that both reaction channels are essentially barrierless (in the sense that all relevant transition states lie below or only marginally above the reactants) and once tunneling is taken into the proper account indicate that the reaction can occur under the low temperature conditions of interstellar environments.
Collapse
Affiliation(s)
- Fanny Vazart
- Scuola Normale Superiore, piazza dei Cavalieri 7, 56125 Pisa, Italy
| | - Danilo Calderini
- Scuola Normale Superiore, piazza dei Cavalieri 7, 56125 Pisa, Italy
| | - Cristina Puzzarini
- Dipartimento di Chimica "Giacomo Ciamician", Via F. Selmi 2, 40126 Bologna, Italy
| | | | - Vincenzo Barone
- Scuola Normale Superiore, piazza dei Cavalieri 7, 56125 Pisa, Italy
| |
Collapse
|
26
|
Shiekh BA, Kaur D, Seth B, Mahajan S. The theoretical-cum-statistical approach for the investigation of reaction NO2+ O(3P) → NO + O2 using SCTST and a full anharmonic VPT2 model. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2016.08.058] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
27
|
Greene SM, Shan X, Clary DC. Rate constants of chemical reactions from semiclassical transition state theory in full and one dimension. J Chem Phys 2016; 144:244116. [DOI: 10.1063/1.4954840] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Samuel M. Greene
- Physical and Theoretical Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QZ, United Kingdom
| | - Xiao Shan
- Physical and Theoretical Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QZ, United Kingdom
| | - David C. Clary
- Physical and Theoretical Chemistry Laboratory, Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QZ, United Kingdom
| |
Collapse
|
28
|
|
29
|
Smith MC, Chao W, Takahashi K, Boering KA, Lin JJM. Unimolecular Decomposition Rate of the Criegee Intermediate (CH3)2COO Measured Directly with UV Absorption Spectroscopy. J Phys Chem A 2016; 120:4789-98. [DOI: 10.1021/acs.jpca.5b12124] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mica C. Smith
- Department
of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
- Institute
of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
| | - Wen Chao
- Institute
of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
- Department
of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| | - Kaito Takahashi
- Institute
of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
| | - Kristie A. Boering
- Department
of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
- Department
of Earth and Planetary Science, University of California, Berkeley, Berkeley, California 94720, United States
| | - Jim Jr-Min Lin
- Institute
of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
- Department
of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| |
Collapse
|
30
|
Aieta C, Gabas F, Ceotto M. An Efficient Computational Approach for the Calculation of the Vibrational Density of States. J Phys Chem A 2016; 120:4853-62. [DOI: 10.1021/acs.jpca.5b12364] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chiara Aieta
- Dipartimento
di Chimica, Università degli Studi di Milano, via C. Golgi
19, 20133 Milano, Italy
| | - Fabio Gabas
- Dipartimento
di Chimica, Università degli Studi di Milano, via C. Golgi
19, 20133 Milano, Italy
- CINECA - Interuniversity
Computing Center Supercomputing Applications and Innovation Department
- SCAI Via R. Sanzio, 4, 20090 Segrate, Milan, Italy
| | - Michele Ceotto
- Dipartimento
di Chimica, Università degli Studi di Milano, via C. Golgi
19, 20133 Milano, Italy
| |
Collapse
|
31
|
The role of torsional motion on the properties of propiolic acid and its H/D isotopic analogs: A density functional study using SCTST and a full anharmonic VPT2 model. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2016.01.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
32
|
Lin LC, Chang HT, Chang CH, Chao W, Smith MC, Chang CH, Jr-Min Lin J, Takahashi K. Competition between H2O and (H2O)2 reactions with CH2OO/CH3CHOO. Phys Chem Chem Phys 2016; 18:4557-68. [DOI: 10.1039/c5cp06446e] [Citation(s) in RCA: 115] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
We calculated the bimolecular rate coefficients for the CH2OO/CH3CHOO reactions with H2O/(H2O)2.
Collapse
Affiliation(s)
- Liang-Chun Lin
- Institute of Atomic and Molecular Sciences
- Academia Sinica
- Taipei 10617
- Taiwan
- Department of Chemistry
| | - Hung-Tzu Chang
- Institute of Atomic and Molecular Sciences
- Academia Sinica
- Taipei 10617
- Taiwan
| | - Chien-Hsun Chang
- Institute of Atomic and Molecular Sciences
- Academia Sinica
- Taipei 10617
- Taiwan
| | - Wen Chao
- Institute of Atomic and Molecular Sciences
- Academia Sinica
- Taipei 10617
- Taiwan
- Department of Chemistry
| | - Mica C. Smith
- Institute of Atomic and Molecular Sciences
- Academia Sinica
- Taipei 10617
- Taiwan
- Department of Chemistry
| | - Chun-Hung Chang
- Institute of Atomic and Molecular Sciences
- Academia Sinica
- Taipei 10617
- Taiwan
| | - Jim Jr-Min Lin
- Institute of Atomic and Molecular Sciences
- Academia Sinica
- Taipei 10617
- Taiwan
- Department of Chemistry
| | - Kaito Takahashi
- Institute of Atomic and Molecular Sciences
- Academia Sinica
- Taipei 10617
- Taiwan
| |
Collapse
|
33
|
Piccardo M, Bloino J, Barone V. Generalized Vibrational Perturbation Theory for Rotovibrational Energies of Linear, Symmetric and Asymmetric Tops: Theory, Approximations, and Automated Approaches to Deal with Medium-to-Large Molecular Systems. INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY 2015; 115:948-982. [PMID: 26345131 PMCID: PMC4553754 DOI: 10.1002/qua.24931] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/02/2015] [Revised: 04/03/2015] [Accepted: 04/08/2015] [Indexed: 06/05/2023]
Abstract
Models going beyond the rigid-rotor and the harmonic oscillator levels are mandatory for providing accurate theoretical predictions for several spectroscopic properties. Different strategies have been devised for this purpose. Among them, the treatment by perturbation theory of the molecular Hamiltonian after its expansion in power series of products of vibrational and rotational operators, also referred to as vibrational perturbation theory (VPT), is particularly appealing for its computational efficiency to treat medium-to-large systems. Moreover, generalized (GVPT) strategies combining the use of perturbative and variational formalisms can be adopted to further improve the accuracy of the results, with the first approach used for weakly coupled terms, and the second one to handle tightly coupled ones. In this context, the GVPT formulation for asymmetric, symmetric, and linear tops is revisited and fully generalized to both minima and first-order saddle points of the molecular potential energy surface. The computational strategies and approximations that can be adopted in dealing with GVPT computations are pointed out, with a particular attention devoted to the treatment of symmetry and degeneracies. A number of tests and applications are discussed, to show the possibilities of the developments, as regards both the variety of treatable systems and eligible methods.
Collapse
Affiliation(s)
- Matteo Piccardo
- Scuola Normale Superiore Piazza dei Cavalieri 7, I-56126, Pisa, Italy E-mail:
| | - Julien Bloino
- Scuola Normale Superiore Piazza dei Cavalieri 7, I-56126, Pisa, Italy E-mail: ; Consiglio Nazionale delle Ricerche, Istituto di Chimica dei Composti Organometallici (CNR-ICCOM) UOS di Pisa Via G. Moruzzi, 1, I-56124, Italy
| | - Vincenzo Barone
- Scuola Normale Superiore Piazza dei Cavalieri 7, I-56126, Pisa, Italy E-mail:
| |
Collapse
|
34
|
Smith MC, Chang CH, Chao W, Lin LC, Takahashi K, Boering KA, Lin JJM. Strong Negative Temperature Dependence of the Simplest Criegee Intermediate CH2OO Reaction with Water Dimer. J Phys Chem Lett 2015; 6:2708-2713. [PMID: 26266852 DOI: 10.1021/acs.jpclett.5b01109] [Citation(s) in RCA: 88] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The kinetics of the reaction of CH2OO with water vapor was measured directly with UV absorption at temperatures from 283 to 324 K. The observed CH2OO decay rate is second order with respect to the H2O concentration, indicating water dimer participates in the reaction. The rate coefficient of the CH2OO reaction with water dimer can be described by an Arrhenius expression k(T) = A exp(-Ea/RT) with an activation energy of -8.1 ± 0.6 kcal mol(-1) and k(298 K) = (7.4 ± 0.6) × 10(-12) cm(3) s(-1). Theoretical calculations yield a large negative temperature dependence consistent with the experimental results. The temperature dependence increases the effective loss rate for CH2OO by a factor of ~2.5 at 278 K and decreases by a factor of ~2 at 313 K relative to 298 K, suggesting that temperature is important for determining the impact of Criegee intermediate reactions with water in the atmosphere.
Collapse
Affiliation(s)
- Mica C Smith
- †Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
- ‡Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
| | - Chun-Hung Chang
- ‡Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
| | - Wen Chao
- ‡Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
- §Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| | - Liang-Chun Lin
- ‡Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
- §Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| | - Kaito Takahashi
- ‡Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
| | - Kristie A Boering
- †Department of Chemistry, University of California, Berkeley, Berkeley, California 94720, United States
- ∥Department of Earth and Planetary Science, University of California, Berkeley, Berkeley, California 94720, United States
| | - Jim Jr-Min Lin
- ‡Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan
- §Department of Chemistry, National Taiwan University, Taipei 10617, Taiwan
| |
Collapse
|
35
|
Saheb V. Theoretical studies on the kinetics of hydrogen abstraction reactions of H and CH3 radicals from CH3OCH3 and some of their H/D isotopologues. J Phys Chem A 2015; 119:4711-7. [PMID: 25873440 DOI: 10.1021/acs.jpca.5b00911] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The hydrogen abstraction reactions by H and CH3 radicals from CH3OCH3 and some of their H/D isotopologues are studied by semiclassical transition state theory. Many high-level density functional, ab initio, and combinatory quantum chemical methods, including B3LYP, BB1K, MP2, MP4, CCSD(T), CBS-Q, and G4 methods, are employed to compute the energies and rovibrational properties of the stationary points for the title reactions. Xij vibrational anharmonicity coefficients, used in semiclassical transition state theory, are computed at the B3LYP, BB1K, and MP2 levels of theory. Thermal rate coefficients and kinetic isotope effects are computed over the temperature range from 200 to 2500 K and compared with available experimental data. The computed rate constants for the title reactions are represented as the equation k(T) = ATn exp[−E(T + T0)/(T2 + T02)].
Collapse
Affiliation(s)
- Vahid Saheb
- Department of Chemistry, Shahid-Bahonar University of Kerman, Kerman 76169, Iran
| |
Collapse
|
36
|
Goubet M, Pirali O. The far-infrared spectrum of azulene and isoquinoline and supporting anharmonic density functional theory calculations to high resolution spectroscopy of polycyclic aromatic hydrocarbons and derivatives. J Chem Phys 2015; 140:044322. [PMID: 25669538 DOI: 10.1063/1.4862828] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
In the laboratory, the acquisition and analysis of the rotationally resolved spectra of large molecular systems remain challenging. We report in this paper the rotational analysis of the ν30-GS band of azulene and the ν41-GS band of isoquinoline recorded with synchrotron-based Fourier transform absorption spectroscopy in the far-IR. As a support to rotational analyses, we employed a method based on standard density functional theory calculations performed at the anharmonic level which accurately reproduced the rotational constants of 28 vibrational states of 16 Polycyclic Aromatic Hydrocarbons (PAHs) and aza-derivatives. This method appears as an invaluable support for the spectral assignment of the very congested rotational structures of the infrared bands of PAH species and should be very helpful in the active search of these molecules in space through their pure rotational or rovibrational spectra.
Collapse
Affiliation(s)
- Manuel Goubet
- Laboratoire de Physique des Lasers, Atomes et Molécules, UMR 8523 CNRS - Université Lille 1, Bâtiment P5, F-59655 Villeneuve d'Ascq Cedex, France
| | - Olivier Pirali
- AILES Beamline, Synchrotron SOLEIL, l'Orme des Merisiers, Saint-Aubin, 91192 Gif-sur-Yvette cedex, France
| |
Collapse
|
37
|
Vereecken L, Glowacki DR, Pilling MJ. Theoretical Chemical Kinetics in Tropospheric Chemistry: Methodologies and Applications. Chem Rev 2015; 115:4063-114. [DOI: 10.1021/cr500488p] [Citation(s) in RCA: 146] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Luc Vereecken
- Max Planck Institute for Chemistry, 55128 Mainz, Germany
| | - David R. Glowacki
- PULSE
Institute and Department of Chemistry, Stanford University, Stanford, California 94305, United States
- SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
- School
of Chemistry, University of Bristol, Bristol BS8 1TS, United Kingdom
- Department
of Computer Science, University of Bristol, Bristol BS8 1UB, United Kingdom
| | | |
Collapse
|
38
|
Pirali O, Kisiel Z, Goubet M, Gruet S, Martin-Drumel MA, Cuisset A, Hindle F, Mouret G. Rotation-vibration interactions in the spectra of polycyclic aromatic hydrocarbons: Quinoline as a test-case species. J Chem Phys 2015; 142:104310. [DOI: 10.1063/1.4913750] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- O. Pirali
- AILES Beamline, Synchrotron SOLEIL, l’Orme des Merisiers, Saint-Aubin, 91192 Gif-sur-Yvette cedex, France
- Institut des Sciences Moléculaires d’Orsay, UMR8214 CNRS – Université Paris-Sud, Bât. 210, 91405 Orsay cedex, France
| | - Z. Kisiel
- Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warsaw, Poland
| | - M. Goubet
- Laboratoire de Physique des Lasers, Atomes et Molécules, UMR 8523 CNRS - Université Lille 1, Bâtiment P5, F-59655 Villeneuve d’Ascq Cedex, France
| | - S. Gruet
- AILES Beamline, Synchrotron SOLEIL, l’Orme des Merisiers, Saint-Aubin, 91192 Gif-sur-Yvette cedex, France
- Institut des Sciences Moléculaires d’Orsay, UMR8214 CNRS – Université Paris-Sud, Bât. 210, 91405 Orsay cedex, France
| | - M. A. Martin-Drumel
- Laboratoire de Physico-Chimie de l’Atmosphère, EA-4493, Université du Littoral – Côte d’Opale, 59140 Dunkerque, France
| | - A. Cuisset
- Laboratoire de Physico-Chimie de l’Atmosphère, EA-4493, Université du Littoral – Côte d’Opale, 59140 Dunkerque, France
| | - F. Hindle
- Laboratoire de Physico-Chimie de l’Atmosphère, EA-4493, Université du Littoral – Côte d’Opale, 59140 Dunkerque, France
| | - G. Mouret
- Laboratoire de Physico-Chimie de l’Atmosphère, EA-4493, Université du Littoral – Côte d’Opale, 59140 Dunkerque, France
| |
Collapse
|
39
|
Vazart F, Calderini D, Skouteris D, Latouche C, Barone V. Reassessment of the Thermodynamic, Kinetic, and Spectroscopic Features of Cyanomethanimine Derivatives: A Full Anharmonic Perturbative Treatment. J Chem Theory Comput 2015; 11:1165-71. [PMID: 26579765 DOI: 10.1021/ct501147a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Herein we report a full thermodynamic and vibrational investigation of C-cyanomethanimine isomers rooted into the Density Functional Theory (DFT) and the second-order vibrational perturbation theory (VPT2). We show that an anharmonic treatment affects dramatically the vibrational behavior of the molecules, especially thanks to the inclusion of interaction terms between the various modes. Furthermore, the equilibrium constant between the isomers, as well as the rate constant, have been obtained at both harmonic and anharmonic levels showing, as expected, slight but non-negligible differences. To support our investigation, dispersion effects have been employed.
Collapse
Affiliation(s)
- Fanny Vazart
- Scuola Normale Superiore , piazza dei Cavalieri 7, 56125 Pisa, Italy
| | - Danilo Calderini
- Scuola Normale Superiore , piazza dei Cavalieri 7, 56125 Pisa, Italy
| | | | - Camille Latouche
- Scuola Normale Superiore , piazza dei Cavalieri 7, 56125 Pisa, Italy
| | - Vincenzo Barone
- Scuola Normale Superiore , piazza dei Cavalieri 7, 56125 Pisa, Italy
| |
Collapse
|
40
|
Calvo F, Li Y, Kiawi DM, Bakker JM, Parneix P, Janssens E. Nonlinear effects in infrared action spectroscopy of silicon and vanadium oxide clusters: experiment and kinetic modeling. Phys Chem Chem Phys 2015. [DOI: 10.1039/c5cp02304a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Nonlinear effects in infrared action spectroscopy are experimentally quantified and successfully modeled for different inorganic clusters.
Collapse
Affiliation(s)
- Florent Calvo
- Laboratoire Interdisciplinaire de Physique
- Rue de La Piscine
- Campus Saint Martin d'Hères
- 38000 Grenoble
- France
| | - Yejun Li
- Laboratory of Solid State Physics and Magnetism
- KU Leuven
- B-3001 Leuven
- Belgium
| | - Denis M. Kiawi
- Radboud University
- Institute for Molecules and Materials
- FELIX Laboratory
- 6525 ED Nijmegen
- The Netherlands
| | - Joost M. Bakker
- Radboud University
- Institute for Molecules and Materials
- FELIX Laboratory
- 6525 ED Nijmegen
- The Netherlands
| | - Pascal Parneix
- Institut des Sciences Moléculaires d'Orsay
- UMR CNRS 8214
- Université Paris Sud 11
- F91405 Orsay Cedex
- France
| | - Ewald Janssens
- Laboratory of Solid State Physics and Magnetism
- KU Leuven
- B-3001 Leuven
- Belgium
| |
Collapse
|
41
|
Kim K, Johnson AM, Powell AL, Mitchell DG, Sevy ET. High resolution IR diode laser study of collisional energy transfer between highly vibrationally excited monofluorobenzene and CO2: the effect of donor fluorination on strong collision energy transfer. J Chem Phys 2014; 141:234306. [PMID: 25527934 DOI: 10.1063/1.4903252] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Collisional energy transfer between vibrational ground state CO2 and highly vibrationally excited monofluorobenzene (MFB) was studied using narrow bandwidth (0.0003 cm(-1)) IR diode laser absorption spectroscopy. Highly vibrationally excited MFB with E' = ∼41,000 cm(-1) was prepared by 248 nm UV excitation followed by rapid radiationless internal conversion to the electronic ground state (S1→S0*). The amount of vibrational energy transferred from hot MFB into rotations and translations of CO2 via collisions was measured by probing the scattered CO2 using the IR diode laser. The absolute state specific energy transfer rate constants and scattering probabilities for single collisions between hot MFB and CO2 were measured and used to determine the energy transfer probability distribution function, P(E,E'), in the large ΔE region. P(E,E') was then fit to a bi-exponential function and extrapolated to the low ΔE region. P(E,E') and the biexponential fit data were used to determine the partitioning between weak and strong collisions as well as investigate molecular properties responsible for large collisional energy transfer events. Fermi's Golden rule was used to model the shape of P(E,E') and identify which donor vibrational motions are primarily responsible for energy transfer. In general, the results suggest that low-frequency MFB vibrational modes are primarily responsible for strong collisions, and govern the shape and magnitude of P(E,E'). Where deviations from this general trend occur, vibrational modes with large negative anharmonicity constants are more efficient energy gateways than modes with similar frequency, while vibrational modes with large positive anharmonicity constants are less efficient at energy transfer than modes of similar frequency.
Collapse
Affiliation(s)
- Kilyoung Kim
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, USA
| | - Alan M Johnson
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, USA
| | - Amber L Powell
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, USA
| | - Deborah G Mitchell
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, USA
| | - Eric T Sevy
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602, USA
| |
Collapse
|
42
|
Saheb V, Dayani Yazdi S. Hydrogen abstraction reactions of hydroxyl radicals with 1,1,2,2-tetrachloroethane, 1,1,1,2-tetrachloroethane and pentachloroethane studied by using semi-classical transition state theory. Mol Phys 2014. [DOI: 10.1080/00268976.2014.924632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
43
|
Saheb V, Pourhaghighi NY. Theoretical Kinetics Studies on the Reaction of CF3CF═CF2 with Hydroxyl Radical. J Phys Chem A 2014; 118:9941-50. [DOI: 10.1021/jp5055099] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Vahid Saheb
- Department of Chemistry, Faculty of Sciences, Shahid Bahonar University of Kerman, Kerman, Iran
| | | |
Collapse
|
44
|
Féraud G, Pino T, Falvo C, Parneix P, Combriat T, Bréchignac P. Intramolecular Processes Revealed Using UV-Laser-Induced IR-Fluorescence: A New Perspective on the "Channel Three" of Benzene. J Phys Chem Lett 2014; 5:1083-1090. [PMID: 26274453 DOI: 10.1021/jz402697u] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Radiative relaxation in the infrared (IR) is common following nonradiative electronic relaxation processes, but it is rarely measured. We present ultraviolet laser-induced infrared fluorescence (UV-LIIRF) excitation spectroscopy and dispersed UV-LIIRF spectroscopy of gas phase benzene vibronically excited around the onset of channel 3, using a homemade spectrometer. We found that the vibrational IR fluorescence yield is clearly higher when benzene is excited above the onset than when it is excited below. Significant changes in dispersed IR emission profiles resulting from excitations below and above the onset of channel 3 were also observed. These results suggest that isomerization of benzene toward fulvene occurs efficiently below the opening of channel 3 and confirm that channel 3 involves a photophysical relaxation pathway that efficiently competes with isomerization.
Collapse
Affiliation(s)
- G Féraud
- Institut des Sciences Moléculaires d'Orsay, CNRS, Univ Paris-Sud, 91405 Orsay Cedex, France
| | - T Pino
- Institut des Sciences Moléculaires d'Orsay, CNRS, Univ Paris-Sud, 91405 Orsay Cedex, France
| | - C Falvo
- Institut des Sciences Moléculaires d'Orsay, CNRS, Univ Paris-Sud, 91405 Orsay Cedex, France
| | - P Parneix
- Institut des Sciences Moléculaires d'Orsay, CNRS, Univ Paris-Sud, 91405 Orsay Cedex, France
| | - T Combriat
- Institut des Sciences Moléculaires d'Orsay, CNRS, Univ Paris-Sud, 91405 Orsay Cedex, France
| | - Ph Bréchignac
- Institut des Sciences Moléculaires d'Orsay, CNRS, Univ Paris-Sud, 91405 Orsay Cedex, France
| |
Collapse
|
45
|
Kamarchik E, Jasper AW. Anharmonic state counts and partition functions for molecules via classical phase space integrals in curvilinear coordinates. J Chem Phys 2013; 138:194109. [DOI: 10.1063/1.4804420] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
46
|
Parneix P, Basire M, Calvo F. Accurate modeling of infrared multiple photon dissociation spectra: the dynamical role of anharmonicities. J Phys Chem A 2013; 117:3954-9. [PMID: 23581979 DOI: 10.1021/jp402459f] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The dynamical response of a molecular system to a macropulse typically produced by a free-electron laser is theoretically modeled over experimentally long times, within a realistic kinetic Monte Carlo framework that incorporates absorption, stimulated emission, spontaneous emission, and dissociation events. The simulation relies on an anharmonic potential energy surface obtained from quantum chemistry calculations. Application to cationic naphthalene yields a better agreement with measurements than the anharmonic linear absorption spectrum, thus emphasizing the importance of specific dynamical effects on the spectral properties.
Collapse
Affiliation(s)
- Pascal Parneix
- Institut des Sciences Moléculaires d'Orsay, UMR CNRS 8214, Université Paris Sud 11, Bât. 210, F91405 Orsay Cedex, France.
| | | | | |
Collapse
|
47
|
Weston RE, Nguyen TL, Stanton JF, Barker JR. HO + CO Reaction Rates and H/D Kinetic Isotope Effects: Master Equation Models with ab Initio SCTST Rate Constants. J Phys Chem A 2013; 117:821-35. [DOI: 10.1021/jp311928w] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ralph E. Weston
- Department
of Chemistry, Brookhaven National Laboratory, Upton, New York 11973,
United States
| | - Thanh Lam Nguyen
- Department
of Chemistry and
Biochemistry, The University of Texas,
Austin, Texas 78712-0165, United States
| | - John F. Stanton
- Department
of Chemistry and
Biochemistry, The University of Texas,
Austin, Texas 78712-0165, United States
| | - John R. Barker
- Department of Atmospheric, Oceanic,
and Space Sciences, University of Michigan, Ann Arbor, Michigan 48109-2143, United States
| |
Collapse
|
48
|
Falvo C, Friha H, Pino T, Dhaouadi Z, Parneix P, Calvo F, Bréchignac P. Effects of hydrogen dissociation on the infrared emission spectra of naphthalene: theoretical modeling. Phys Chem Chem Phys 2013; 15:10241-50. [DOI: 10.1039/c3cp44703k] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
49
|
Falvo C, Calvo F, Parneix P. Probing the spin multiplicity of gas-phase polycyclic aromatic hydrocarbons through their infrared emission spectrum: a theoretical study. J Chem Phys 2012; 137:064303. [PMID: 22897269 DOI: 10.1063/1.4739468] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The anharmonic infrared emission spectrum following an optical excitation has been calculated for a variety of polycyclic aromatic hydrocarbon molecules in their ground singlet electronic state or in their triplet state. The computational protocol relies on second-order perturbation theory and involves a quartic vibrational Hamiltonian, the vibrational quantum numbers being sampled according to a Monte Carlo procedure. In the case of neutral naphthalene, the IR spectrum obtained in the (ground) singlet state differs significantly from the spectrum in the triplet state, especially for out-of-plane CH bending modes. Although not as prominent, spectral differences in larger molecules are still observable.
Collapse
Affiliation(s)
- Cyril Falvo
- Institut des Sciences Moléculaires d'Orsay, UMR CNRS 8214, Université Paris Sud, F91405 Orsay Cedex, France.
| | | | | |
Collapse
|
50
|
Dibble TS, Sha Y, Thornton WF, Zhang F. Cis–Trans Isomerization of Chemically Activated 1-Methylallyl Radical and Fate of the Resulting 2-Buten-1-peroxy Radical. J Phys Chem A 2012; 116:7603-14. [DOI: 10.1021/jp303652x] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Theodore S. Dibble
- Department of Chemistry, State University of New York—Environmental Science and Forestry, Syracuse, New York 13210, United States
| | - Yuan Sha
- Department of Chemistry, State University of New York—Environmental Science and Forestry, Syracuse, New York 13210, United States
| | - William F. Thornton
- Department of Chemistry, State University of New York—Environmental Science and Forestry, Syracuse, New York 13210, United States
| | - Feng Zhang
- Department of Chemistry, State University of New York—Environmental Science and Forestry, Syracuse, New York 13210, United States
| |
Collapse
|