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Lam HVS, Venkatachalam AS, Bhattacharyya S, Chen K, Borne K, Wang E, Boll R, Jahnke T, Kumarappan V, Rudenko A, Rolles D. Differentiating Three-Dimensional Molecular Structures Using Laser-Induced Coulomb Explosion Imaging. PHYSICAL REVIEW LETTERS 2024; 132:123201. [PMID: 38579208 DOI: 10.1103/physrevlett.132.123201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2023] [Accepted: 02/12/2024] [Indexed: 04/07/2024]
Abstract
Coulomb explosion imaging (CEI) with x-ray free electron lasers has recently been shown to be a powerful method for obtaining detailed structural information of gas-phase planar ring molecules [R. Boll et al., X-ray multiphoton-induced Coulomb explosion images complex single molecules, Nat. Phys. 18, 423 (2022).NPAHAX1745-247310.1038/s41567-022-01507-0]. In this Letter, we investigate the potential of CEI driven by a tabletop laser and extend this approach to differentiating three-dimensional structures. We study the static CEI patterns of planar and nonplanar organic molecules that resemble the structures of typical products formed in ring-opening reactions. Our results reveal that each molecule exhibits a well-localized and distinctive pattern in three-dimensional fragment-ion momentum space. We find that these patterns yield direct information about the molecular structures and can be qualitatively reproduced using a classical Coulomb explosion simulation. Our findings suggest that laser-induced CEI can serve as a robust method for differentiating molecular structures of organic ring and chain molecules. As such, it holds great promise as a method for following ultrafast structural changes, e.g., during ring-opening reactions, by tracking the motion of individual atoms in pump-probe experiments.
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Affiliation(s)
- Huynh Van Sa Lam
- James R. Macdonald Laboratory, Kansas State University, Manhattan, Kansas 66506, USA
| | | | | | - Keyu Chen
- James R. Macdonald Laboratory, Kansas State University, Manhattan, Kansas 66506, USA
| | - Kurtis Borne
- James R. Macdonald Laboratory, Kansas State University, Manhattan, Kansas 66506, USA
| | - Enliang Wang
- James R. Macdonald Laboratory, Kansas State University, Manhattan, Kansas 66506, USA
| | | | | | - Vinod Kumarappan
- James R. Macdonald Laboratory, Kansas State University, Manhattan, Kansas 66506, USA
| | - Artem Rudenko
- James R. Macdonald Laboratory, Kansas State University, Manhattan, Kansas 66506, USA
| | - Daniel Rolles
- James R. Macdonald Laboratory, Kansas State University, Manhattan, Kansas 66506, USA
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Wasowicz TJ, Dąbkowska I, Kivimäki A, Richter R. Two-body dissociation of isoxazole following double photoionization - an experimental PEPIPICO and theoretical DFT and MP2 study. Phys Chem Chem Phys 2023; 25:31655-31666. [PMID: 37964643 DOI: 10.1039/d3cp03760f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2023]
Abstract
The dissociative double photoionization of isoxazole molecules has been investigated experimentally and theoretically. The experiment has been carried out in the 27.5-36 eV photon energy range using vacuum ultraviolet (VUV) synchrotron radiation excitation combined with ion time-of-flight (TOF) spectrometry and photoelectron-photoion-photoion coincidence (PEPIPICO) technique. Five well-resolved two-body dissociation channels have been identified in the isoxazole's coincidence maps, and their appearance energies have been determined. The coincidence yield curves of these dissociation channels have been obtained in the photon energy ranges from their appearance energies up to 36 eV. The double photoionization of isoxazole produces a C3H3NO2+ transient dication, which decomposes into fragments differing from previously reported photofragmentation products of isoxazole. We have found no evidence of pathways leading to the C3H2NO+, HCN+, C2H2O+, C3HN+, or C2H2+ fragments or their neutral counterparts that have been observed in previous neutral photodissociation and single photoionization studies. Instead, the dissociation of isoxazole after the ejection of two electrons is bond-selective and is governed by two reactions, HCO+ + H2CCN+ and H2CO+ + HCCN+, whose appearance energies are 28.6 (±0.3) and 29.4 (±0.3) eV, respectively. A third dissociation channel turns out to be a variant of the most intense channel (HCO+ + H2CCN+), where one of the fragment ions contains a heavy isotope. Two minor dissociation channels occurring at higher energies, CO+ + CH3CN+ and CN+ + H3CCO+, are also identified. The density functional and ab initio quantum chemical calculations have been performed to elucidate the dissociative charge-separating mechanisms and determine the energies of the observed photoproducts. The present work unravels hitherto unexplored photodissociation mechanisms of isoxazole and thus provides deeper insight into the photophysics of five-membered heterocyclic molecules containing two heteroatoms.
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Affiliation(s)
- Tomasz J Wasowicz
- Division of Complex Systems Spectroscopy, Institute of Physics and Computer Science, Gdansk University of Technology, ul. G. Narutowicza 11/12, 80-233 Gdansk, Poland.
| | - Iwona Dąbkowska
- Department of Analytical Chemistry, Faculty of Chemistry, University of Gdansk, ul. Wita Stwosza 63, 80-308 Gdansk, Poland
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3
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Dias N, Gurusinghe RM, Suits AG. Multichannel Radical-Radical Reaction Dynamics of NO + Propargyl Probed by Broadband Rotational Spectroscopy. J Phys Chem A 2022; 126:5354-5362. [PMID: 35938878 DOI: 10.1021/acs.jpca.2c01629] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Chirped-pulse rotational spectroscopy in a quasi-uniform flow has been used to investigate the reaction dynamics of a multichannel radical-radical reaction of relevance to planetary atmospheres and combustion. In this work, the NO + propargyl (C3H3) reaction was found to yield six product channels containing eight detected species. These products and their branching fractions (%), are as follows: HCN (50), HCNO (18), CH2CN (12), CH3CN (7.4), HC3N (6.2), HNC (2.3), CH2CO (1.3), HCO (1.8). The results are discussed in light of previous unimolecular photodissociation studies of isoxazole and prior potential energy surface calculations of the NO + C3H3 system. The results also show that the product branching is strongly influenced by the excess energy of the reactant radicals. The implications of the title reaction to the planetary atmospheres, particularly to Titan, are discussed.
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Affiliation(s)
- Nureshan Dias
- Department of Chemistry, University of Missouri, Columbia, Missouri 65211 United States
| | - Ranil M Gurusinghe
- Department of Chemistry, University of Missouri, Columbia, Missouri 65211 United States
| | - Arthur G Suits
- Department of Chemistry, University of Missouri, Columbia, Missouri 65211 United States
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4
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Wasowicz TJ, Ljubic I, Kivimäki A, RICHTER R. Core-shell excitation of isoxazole at the C, N, and O K-edges – an experimental NEXAFS and theoretical TD-DFT study. Phys Chem Chem Phys 2022; 24:19302-19313. [DOI: 10.1039/d2cp02366k] [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 near-edge X-ray absorption fine structure (NEXAFS) spectra of the gas-phase isoxazole molecule have been measured by collecting total ion yields at the C, N, and O K-edges. The spectral...
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5
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Geng T, Ehrmaier J, Schalk O, Richings GW, Hansson T, Worth G, Thomas RD. Time-Resolved Photoelectron Spectroscopy Studies of Isoxazole and Oxazole. J Phys Chem A 2020; 124:3984-3992. [PMID: 32242664 PMCID: PMC7304896 DOI: 10.1021/acs.jpca.9b11788] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
The
excited state relaxation pathways of isoxazole and oxazole
upon excitation with UV-light were investigated by nonadiabatic ab
initio dynamics simulations and time-resolved photoelectron spectroscopy.
Excitation of the bright ππ*-state of isoxazole predominantly
leads to ring-opening dynamics. Both the initially excited ππ*-state
and the dissociative πσ*-state offer a combined barrier-free
reaction pathway, such that ring-opening, defined as a distance of
more than 2 Å between two neighboring atoms, occurs within 45
fs. For oxazole, in contrast, the excited state dynamics is about
twice as slow (85 fs) and the quantum yield for ring-opening is lower.
This is caused by a small barrier between the ππ*-state
and the πσ*-state along the reaction path, which suppresses
direct ring-opening. Theoretical findings are consistent with the
measured time-resolved photoelectron spectra, confirming the timescales
and the quantum yields for the ring-opening channel. The results indicate
that a combination of time-resolved photoelectron spectroscopy and
excited state dynamics simulations can explain the dominant reaction
pathways for this class of molecules. As a general rule, we suggest
that the antibonding σ*-orbital located between the oxygen atom
and a neighboring atom of a five-membered heterocyclic system provides
a driving force for ring-opening reactions, which is modified by the
presence and position of additional nitrogen atoms.
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Affiliation(s)
- Ting Geng
- Department of Physics, AlbaNova University Centre, Stockholm University, Roslagstullsbacken 21, 106 91 Stockholm, Sweden
| | - Johannes Ehrmaier
- Department of Chemistry, Technical University of Munich, Lichtenbergstr. 4, 85748 Garching, Germany
| | - Oliver Schalk
- Department of Physics, AlbaNova University Centre, Stockholm University, Roslagstullsbacken 21, 106 91 Stockholm, Sweden.,Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen, Denmark
| | - Gareth W Richings
- Department of Chemistry and Centre for Scientific Computing, University of Warwick, CV4 7AL Coventry, U.K
| | - Tony Hansson
- Department of Physics, AlbaNova University Centre, Stockholm University, Roslagstullsbacken 21, 106 91 Stockholm, Sweden
| | - Graham Worth
- Department of Chemistry, University College London, 20 Gordon Street, WC1H 0AJ London, U.K
| | - Richard D Thomas
- Department of Physics, AlbaNova University Centre, Stockholm University, Roslagstullsbacken 21, 106 91 Stockholm, Sweden
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6
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Inamori M, Ikabata Y, Yoshikawa T, Nakai H. Unveiling controlling factors of the S0/S1 minimum energy conical intersection (2): Application to penalty function method. J Chem Phys 2020; 152:144108. [DOI: 10.1063/1.5142592] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Affiliation(s)
- Mayu Inamori
- Department of Chemistry and Biochemistry, School of Advanced Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan
| | - Yasuhiro Ikabata
- Waseda Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan
| | - Takeshi Yoshikawa
- Waseda Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan
| | - Hiromi Nakai
- Department of Chemistry and Biochemistry, School of Advanced Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan
- Waseda Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan
- Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Katsura, Kyoto 615-8520, Japan
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7
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Schalk O, Galiana J, Geng T, Larsson TL, Thomas RD, Fdez. Galván I, Hansson T, Vacher M. Competition between ring-puckering and ring-opening excited state reactions exemplified on 5H-furan-2-one and derivatives. J Chem Phys 2020; 152:064301. [DOI: 10.1063/1.5129366] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Oliver Schalk
- Department of Physics, AlbaNova University Center, Stockholm University, 106 91 Stockholm, Sweden
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 Copenhagen, Denmark
| | - Joachim Galiana
- Department of Chemistry–Ångström Laboratory, Uppsala University, P.O. Box 538, SE-751 21 Uppsala, Sweden
- Department of Chemistry, École normale supérieure de Lyon, 69342 Lyon, France
| | - Ting Geng
- Department of Physics, AlbaNova University Center, Stockholm University, 106 91 Stockholm, Sweden
| | - Tobias L. Larsson
- Department of Chemistry–Ångström Laboratory, Uppsala University, P.O. Box 538, SE-751 21 Uppsala, Sweden
| | - Richard D. Thomas
- Department of Physics, AlbaNova University Center, Stockholm University, 106 91 Stockholm, Sweden
| | - Ignacio Fdez. Galván
- Department of Chemistry–Ångström Laboratory, Uppsala University, P.O. Box 538, SE-751 21 Uppsala, Sweden
- Department of Chemistry–BMC, Uppsala University, P.O. Box 576, SE-751 23 Uppsala, Sweden
| | - Tony Hansson
- Department of Physics, AlbaNova University Center, Stockholm University, 106 91 Stockholm, Sweden
| | - Morgane Vacher
- Department of Chemistry–Ångström Laboratory, Uppsala University, P.O. Box 538, SE-751 21 Uppsala, Sweden
- Laboratoire CEISAM - UMR CNRS 6230, Université de Nantes, 44300 Nantes, France
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8
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Nelson TR, White AJ, Bjorgaard JA, Sifain AE, Zhang Y, Nebgen B, Fernandez-Alberti S, Mozyrsky D, Roitberg AE, Tretiak S. Non-adiabatic Excited-State Molecular Dynamics: Theory and Applications for Modeling Photophysics in Extended Molecular Materials. Chem Rev 2020; 120:2215-2287. [PMID: 32040312 DOI: 10.1021/acs.chemrev.9b00447] [Citation(s) in RCA: 198] [Impact Index Per Article: 49.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Optically active molecular materials, such as organic conjugated polymers and biological systems, are characterized by strong coupling between electronic and vibrational degrees of freedom. Typically, simulations must go beyond the Born-Oppenheimer approximation to account for non-adiabatic coupling between excited states. Indeed, non-adiabatic dynamics is commonly associated with exciton dynamics and photophysics involving charge and energy transfer, as well as exciton dissociation and charge recombination. Understanding the photoinduced dynamics in such materials is vital to providing an accurate description of exciton formation, evolution, and decay. This interdisciplinary field has matured significantly over the past decades. Formulation of new theoretical frameworks, development of more efficient and accurate computational algorithms, and evolution of high-performance computer hardware has extended these simulations to very large molecular systems with hundreds of atoms, including numerous studies of organic semiconductors and biomolecules. In this Review, we will describe recent theoretical advances including treatment of electronic decoherence in surface-hopping methods, the role of solvent effects, trivial unavoided crossings, analysis of data based on transition densities, and efficient computational implementations of these numerical methods. We also emphasize newly developed semiclassical approaches, based on the Gaussian approximation, which retain phase and width information to account for significant decoherence and interference effects while maintaining the high efficiency of surface-hopping approaches. The above developments have been employed to successfully describe photophysics in a variety of molecular materials.
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Affiliation(s)
- Tammie R Nelson
- Theoretical Division , Los Alamos National Laboratory , Los Alamos , New Mexico 87545 , United States
| | - Alexander J White
- Theoretical Division , Los Alamos National Laboratory , Los Alamos , New Mexico 87545 , United States
| | - Josiah A Bjorgaard
- Theoretical Division , Los Alamos National Laboratory , Los Alamos , New Mexico 87545 , United States
| | - Andrew E Sifain
- Theoretical Division , Los Alamos National Laboratory , Los Alamos , New Mexico 87545 , United States.,U.S. Army Research Laboratory , Aberdeen Proving Ground , Maryland 21005 , United States
| | - Yu Zhang
- Theoretical Division , Los Alamos National Laboratory , Los Alamos , New Mexico 87545 , United States
| | - Benjamin Nebgen
- Theoretical Division , Los Alamos National Laboratory , Los Alamos , New Mexico 87545 , United States
| | | | - Dmitry Mozyrsky
- Theoretical Division , Los Alamos National Laboratory , Los Alamos , New Mexico 87545 , United States
| | - Adrian E Roitberg
- Department of Chemistry , University of Florida , Gainesville , Florida 32611 , United States
| | - Sergei Tretiak
- Theoretical Division , Los Alamos National Laboratory , Los Alamos , New Mexico 87545 , United States
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9
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Cao J. The position of the N atom in the pentacyclic ring of heterocyclic molecules affects the excited-state decay: A case study of isothiazole and thiazole. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2017.11.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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10
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Nunes CM, Pinto SM, Reva I, Rosado MT, Fausto R. Photochemistry of matrix-isolated 3-chloro-1,2-benzisoxazole: Generation and characterization of 2-cyanophenoxyl radical and other reactive intermediates. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2017.11.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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11
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Dias N, Joalland B, Ariyasingha NM, Suits AG, Broderick BM. Direct versus Indirect Photodissociation of Isoxazole from Product Branching: A Chirped-Pulse Fourier Transform mm-Wave Spectroscopy/Pulsed Uniform Flow Investigation. J Phys Chem A 2018; 122:7523-7531. [PMID: 30165738 DOI: 10.1021/acs.jpca.8b04713] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The UV photodissociation of isoxazole (c-C3H3NO) is studied in this work by chirped-pulse Fourier transform mm-wave spectroscopy in a pulsed uniform Laval flow. This approach offers a number of advantages over traditional spectroscopic detection methods due to its broadband, sub-MHz resolution, and fast-acquisition capabilities. In coupling this technique with a quasi-uniform Laval flow, we are able to obtain product branching fractions in the 193 nm photodissociation of isoxazole. Five dissociation channels are explored through direct detection of seven different photoproducts. These species and their respective branching fractions (%) include the following: HCN (53.8 ± 1.7), CH3CN (23.4 ± 6.8), HCO (9.5 ± 2.3), CH2CN (7.8 ± 2.9), CH2CO (3.8 ± 0.9), HCCCN (0.9 ± 0.2), and HNC (0.8 ± 0.2). Guided by previous electronic structure and dynamics simulations, we are able to elucidate the dissociation dynamics that govern the final product branching fractions observed in this work, which differ significantly from previous reports on the thermal decomposition of isoxazole. Interestingly, both direct and indirect dynamics contribute to its dissociation, and clear signatures of both are manifested in the relative branching ratios obtained. Consistent with previous studies on the unimolecular dissociation of isoxazole, our findings also suggest the importance of the open-shell singlet diradicaloid species vinylnitrene in the dissociation dynamics, regardless of the initially populated excited state. This work, taken together with previous investigations, provides a global picture of the complex dissociation pathways involved in the photodissociation of isoxazole.
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Affiliation(s)
- Nureshan Dias
- Department of Chemistry, University of Missouri , Columbia , Missouri 65211 , United States
| | - Baptiste Joalland
- Department of Chemistry, University of Missouri , Columbia , Missouri 65211 , United States
| | - Nuwandi M Ariyasingha
- Department of Chemistry, University of Missouri , Columbia , Missouri 65211 , United States
| | - Arthur G Suits
- Department of Chemistry, University of Missouri , Columbia , Missouri 65211 , United States
| | - Bernadette M Broderick
- Department of Chemistry, University of Missouri , Columbia , Missouri 65211 , United States
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12
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Nakai H, Inamori M, Ikabata Y, Wang Q. Unveiling Controlling Factors of the S0/S1 Minimum Energy Conical Intersection: A Theoretical Study. J Phys Chem A 2018; 122:8905-8910. [DOI: 10.1021/acs.jpca.8b07864] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Hiromi Nakai
- Department of Chemistry and Biochemistry, School of Advanced Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan
- Waseda Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan
- Elements Strategy Initiative for Catalysts and Batteries (ESICB), Kyoto University, Katsura, Kyoto 615-8520, Japan
| | - Mayu Inamori
- Department of Chemistry and Biochemistry, School of Advanced Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan
| | - Yasuhiro Ikabata
- Waseda Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan
| | - Qi Wang
- Waseda Research Institute for Science and Engineering, Waseda University, 3-4-1 Okubo, Shinjuku-ku, Tokyo 169-8555, Japan
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13
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Mikhailov KI, Galenko EE, Galenko AV, Novikov MS, Ivanov AY, Starova GL, Khlebnikov AF. Fe(II)-Catalyzed Isomerization of 5-Chloroisoxazoles to 2H-Azirine-2-carbonyl Chlorides as a Key Stage in the Synthesis of Pyrazole–Nitrogen Heterocycle Dyads. J Org Chem 2018; 83:3177-3187. [DOI: 10.1021/acs.joc.8b00069] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kirill I. Mikhailov
- Institute of Chemistry, Saint Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
| | - Ekaterina E. Galenko
- Institute of Chemistry, Saint Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
| | - Alexey V. Galenko
- Institute of Chemistry, Saint Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
| | - Mikhail S. Novikov
- Institute of Chemistry, Saint Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
| | - Alexander Yu. Ivanov
- Institute of Chemistry, Saint Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
| | - Galina L. Starova
- Institute of Chemistry, Saint Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
| | - Alexander F. Khlebnikov
- Institute of Chemistry, Saint Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg 199034, Russia
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14
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Pusch S, Tröster A, Lefrancois D, Farahani P, Dreuw A, Bach T, Opatz T. Mechanism and cis/trans Selectivity of Vinylogous Nazarov-type [6π] Photocyclizations. J Org Chem 2018; 83:964-972. [DOI: 10.1021/acs.joc.7b02982] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Stefan Pusch
- Institute
of Organic Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10−14, 55128 Mainz, Germany
| | - Andreas Tröster
- Department
Chemie and Catalysis Research Center (CRC), Technical University Munich, Lichtenbergstrasse 4, 85747 Garching, Germany
| | - Daniel Lefrancois
- Interdisciplinary
Center for Scientific Computing, Ruprecht-Karls University, Im Neuenheimer
Feld 205A, 69120 Heidelberg, Germany
| | - Pooria Farahani
- Instituto
de Química, Departamento de Química Fundamental, Universidade de São Paulo, C. P. 05508-000, São Paulo, SP Brazil
| | - Andreas Dreuw
- Interdisciplinary
Center for Scientific Computing, Ruprecht-Karls University, Im Neuenheimer
Feld 205A, 69120 Heidelberg, Germany
| | - Thorsten Bach
- Department
Chemie and Catalysis Research Center (CRC), Technical University Munich, Lichtenbergstrasse 4, 85747 Garching, Germany
| | - Till Opatz
- Institute
of Organic Chemistry, Johannes Gutenberg University Mainz, Duesbergweg 10−14, 55128 Mainz, Germany
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15
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Nunes CM, Pinto SM, Reva I, Fausto R. Photochemistry of 3-amino-1,2-benzisoxazole: unexpected photoisomerization of an amino-spiro-2H-azirine to a 1H-diazirine. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.09.098] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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16
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Cao J, Xie ZZ, Yu X. Excited-state dynamics of oxazole: A combined electronic structure calculations and dynamic simulations study. Chem Phys 2016. [DOI: 10.1016/j.chemphys.2016.05.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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17
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Nunes CM, Pinto SMV, Reva I, Fausto R. On the Photochemistry of 1,2-Benzisoxazole: Capture of Elusive Spiro-2H-azirine and Ketenimine Intermediates. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600668] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Cláudio M. Nunes
- CQC; Department of Chemistry; University of Coimbra; 3004-535 Coimbra Portugal
| | - Sandra M. V. Pinto
- CQC; Department of Chemistry; University of Coimbra; 3004-535 Coimbra Portugal
| | - Igor Reva
- CQC; Department of Chemistry; University of Coimbra; 3004-535 Coimbra Portugal
| | - Rui Fausto
- CQC; Department of Chemistry; University of Coimbra; 3004-535 Coimbra Portugal
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