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Cao W, Hu Z, Peng X, Sun H, Sun Z, Wang XB. Annihilating Actinic Photochemistry of the Pyruvate Anion by One and Two Water Molecules. J Am Chem Soc 2022; 144:19317-19325. [PMID: 36166618 DOI: 10.1021/jacs.2c06319] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Photochemical behaviors of pyruvic acid in multiple phases have been extensively studied, while those of its conjugate base, the pyruvate anion (CH3COCOO-, PA-) are less understood and remain contradictory in gaseous versus aqueous phases. Here in this article, we report a joint experimental and theoretical study combining cryogenic, wavelength-resolved negative ion photoelectron spectroscopy (NIPES) and high-level quantum chemical computations to investigate PA- actinic photochemistry and its dependence on microsolvation in the gas phase. PA-·nH2O (n = 0-5) clusters were generated and characterized, with their low-lying isomers identified. NIPES conducted at multiple wavelengths across the PA- actinic regime revealed the PA- photochemistry extremely sensitive to its hydration extent. While bare PA- anions exhibit active photoinduced dissociations that generate the acetyl (CH3CO-), methide (CH3-) anions, their corresponding radicals, and slow electrons, one single attached water molecule results in significant suppression with a subsequent second water being able to completely block all dissociation pathways, effectively annihilating all PA- photochemical reactivities. The underlying dissociation mechanisms of PA-·nH2O (n = 0-2) clusters are proposed involving nπ* excitation, dehydration, decarboxylation, and further CO loss. Since the photoexcited dihydrate does not have sufficient energy to overcome the full dehydration barrier before PA- could fragmentate, the PA- dissociation pathway is completely blocked, with the energy most likely released via loss of one water and internal electronic and vibrational relaxations. The insight unraveled in this work provides a much-needed critical link to connect the seemingly conflicting PA- actinic chemistry between the gas and condensed phases.
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Affiliation(s)
- Wenjin Cao
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Zhubin Hu
- State Key Laboratory of Precision Spectroscopy, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, China
| | - Xiaogai Peng
- State Key Laboratory of Precision Spectroscopy, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, China
| | - Haitao Sun
- State Key Laboratory of Precision Spectroscopy, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, China.,NYU-ECNU Center for Computational Chemistry at NYU Shanghai, Shanghai 200062, China.,Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi 030006, China
| | - Zhenrong Sun
- State Key Laboratory of Precision Spectroscopy, School of Physics and Electronic Science, East China Normal University, Shanghai 200241, China.,Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan, Shanxi 030006, China
| | - Xue-Bin Wang
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
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2
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Kappes K, Frandsen BN, Vaida V. Infrared spectroscopy of 2-oxo-octanoic acid in multiple phases. Phys Chem Chem Phys 2022; 24:6757-6768. [PMID: 35237773 DOI: 10.1039/d1cp05345k] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Alpha-keto acids are environmentally and biologically relevant species whose chemistry has been shown to be influenced by their local environment. Vibrational spectroscopy provides useful ways to probe the potential inter- and intramolecular interactions available to them in several phases. We measure and compare the IR spectra of 2-oxo-octanoic acid (2OOA) in the gas phase, solid phase, and at the air-water interface. With theoretical support, we assign many of the vibrational modes in each of the spectra. In the gas phase, two types of conformers are identified and distinguished, with the intramolecularly H-bonded form being the dominant type, while the second conformer type identified does not have an intramolecular hydrogen bond. The van der Waals interactions between molecules in solid 2OOA manifest C-H and CO vibrations lower in energy than in the gas phase and we propose an intermolecular hydrogen bonding scheme for the solid phase. At the air-water interface the hydrocarbon tails of 2OOA do interact with each other while the carbonyls appear to interact with water in the subphase, but not with neighboring 2OOA as might be expected of a closely packed surfactant film.
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Affiliation(s)
- Keaten Kappes
- Department of Chemistry, University of Colorado-Boulder, UCB 215, Boulder, CO 80309, USA. .,Cooperative Institute for Research in Environmental Sciences, University of Colorado-Boulder, UCB 216, Boulder, CO 80309, USA
| | - Benjamin N Frandsen
- Department of Chemistry, University of Colorado-Boulder, UCB 215, Boulder, CO 80309, USA. .,Cooperative Institute for Research in Environmental Sciences, University of Colorado-Boulder, UCB 216, Boulder, CO 80309, USA
| | - Veronica Vaida
- Department of Chemistry, University of Colorado-Boulder, UCB 215, Boulder, CO 80309, USA. .,Cooperative Institute for Research in Environmental Sciences, University of Colorado-Boulder, UCB 216, Boulder, CO 80309, USA
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3
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Blair SL, Reed Harris AE, Frandsen BN, Kjaergaard HG, Pangui E, Cazaunau M, Doussin JF, Vaida V. Conformer-Specific Photolysis of Pyruvic Acid and the Effect of Water. J Phys Chem A 2020; 124:1240-1252. [DOI: 10.1021/acs.jpca.9b10613] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Sandra L. Blair
- Department of Chemistry, University of Colorado Boulder, UCB 215, Boulder, Colorado 80309, United States
| | - Allison E. Reed Harris
- Department of Chemistry, University of Colorado Boulder, UCB 215, Boulder, Colorado 80309, United States
| | - Benjamin N. Frandsen
- Department of Chemistry, University of Colorado Boulder, UCB 215, Boulder, Colorado 80309, United States
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen Ø, Denmark
| | - Henrik G. Kjaergaard
- Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100 Copenhagen Ø, Denmark
| | - Edouard Pangui
- Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA), UMR CNRS 7583, Institut Pierre Simon Laplace (IPSL), Université Paris-Est Créteil (UPEC) et Université de Paris (UP), 94010 Créteil, France
| | - Mathieu Cazaunau
- Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA), UMR CNRS 7583, Institut Pierre Simon Laplace (IPSL), Université Paris-Est Créteil (UPEC) et Université de Paris (UP), 94010 Créteil, France
| | - Jean-Francois Doussin
- Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA), UMR CNRS 7583, Institut Pierre Simon Laplace (IPSL), Université Paris-Est Créteil (UPEC) et Université de Paris (UP), 94010 Créteil, France
| | - Veronica Vaida
- Department of Chemistry, University of Colorado Boulder, UCB 215, Boulder, Colorado 80309, United States
- Cooperative Institute for Research in Environmental Sciences, University of Colorado Boulder, UCB 216, Boulder, Colorado 80309, United States
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4
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da Silva G. Decomposition of Pyruvic Acid on the Ground-State Potential Energy Surface. J Phys Chem A 2015; 120:276-83. [DOI: 10.1021/acs.jpca.5b10078] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gabriel da Silva
- Department
of Chemical and
Biomolecular Engineering, The University of Melbourne, Melbourne, Victoria 3010, Australia
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Stockdill JL, Wu X, Danishefsky SJ. Coupling reactions of hindered isonitriles and hindered alkyl thioacids: Mechanistic studies. Tetrahedron Lett 2009; 50:5152-5155. [PMID: 20160954 DOI: 10.1016/j.tetlet.2009.06.129] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The coupling reaction between hindered thioacids and isonitriles is developed and described. The mechanism for the formation of the thiopyruvamide products is explored, and the method is applied to a selection of substrates.
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Affiliation(s)
- Jennifer L Stockdill
- Laboratory for Bioorganic Chemistry, Sloan-Kettering Institute for Cancer Research, 1275 York Avenue, New York, NY 10065, USA
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6
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Liu X, Gross ML, Wenthold PG. Modeling the Competitive Dissociation of Protonated 2,3-Butanedione. The Enthalpy of Formation of Methylhydroxycarbene. J Phys Chem A 2005; 109:2183-9. [PMID: 16838989 DOI: 10.1021/jp0452094] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The enthalpy of formation of methylhydroxycarbene, CH(3)COH, has been determined from measurements of the threshold energy for collision-induced dissociation of protonated 2,3-butanedione in a flowing afterglow-triple quadrupole mass spectrometer and found to be 16 +/- 4 kcal/mol, 57 +/- 4 kcal/mol higher than that of acetaldehyde. From the measured enthalpy of formation, the difference between the first and second C-H BDEs in ethanol is found to be 17 kcal/mol, which implies a singlet-triplet splitting of 28 kcal/mol in the carbene. The activation energies for loss of ketene and carbon monoxide from protonated butanedione are found to be 60 +/- 4 and 50 +/- 4 kcal/mol, respectively. On the basis of experimental and computational results, the loss of carbon monoxide is proposed to proceed through a tight transition state. Although calculations also suggest a tight transition state for loss of ketene, the experimental data indicate that it occurs via a loose transition state, possibly forming by proton transfer along the direct dissociation pathway.
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Affiliation(s)
- Xinping Liu
- The Department of Chemistry, Purdue University, West Lafayette, Indiana 47907-1393, USA
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Staikova M, Oh M, Donaldson DJ. Overtone-Induced Decarboxylation: A Potential Sink for Atmospheric Diacids. J Phys Chem A 2005; 109:597-602. [PMID: 16833384 DOI: 10.1021/jp046141v] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Atmospheric photochemistry induced by solar excitation of vibrational overtone transitions has recently been demonstrated to be of importance in cleaving weak bonds (in HO(2)NO(2)) and inducing intramolecular rearrangement followed by reaction (in H(2)SO(4)). Here, we propose another potentially important process: the decarboxylation of organic acids. To demonstrate this possibility, we have calculated the decarboxylation pathways for malonic acid and its monohydrate. The barrier to the gas-phase decarboxylation was calculated to be in the range 26-28 kcal/mol at the B3LYP/6-311++G(3df,3pd) level of theory, in good agreement with previous results. The transition state is a six-membered ring structure which is accessed via concerted O-H and C-C stretches; excitation of v(OH) > or = 3 of either one of the OH stretching modes is sufficient to supply the energy needed for the decarboxylation. A low-energy isomer of the malonic acid-water complex forms an eight-membered, multiply hydrogen bonded structure, bound by 3-6 kcal/mol, somewhat less stable than the lowest energy, six-membered ring isomer. Decarboxylation of such complexes uses water as a catalyst; the water accepts an acidic proton from one malonic acid group and transfers a proton to the carbonyl of the other acid group. The barrier for this process is 20-22 kcal/mol, suggesting that complexes excited to v(OH) > or = 2 possess sufficient energy to react. Using estimated absorption cross sections for the OH overtone transitions, we suggest that the overtone-induced decarboxylation of malonic acid and its water complex is competitive with wet deposition of the acid and with gas-phase reaction with OH for removal of the acid.
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Affiliation(s)
- M Staikova
- Department of Chemistry, University of Toronto, Toronto, Ontario, Canada M5S 3H6
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8
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Reva ID, Stepanian SG, Adamowicz L, Fausto R. Combined FTIR Matrix Isolation and Ab Initio Studies of Pyruvic Acid: Proof for Existence of the Second Conformer. J Phys Chem A 2001. [DOI: 10.1021/jp0101458] [Citation(s) in RCA: 83] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Igor D. Reva
- Department of Chemistry, University of Coimbra, P 3004-535 Coimbra, Portugal, Institute for Low-Temperature Physics & Engineering of the National Academy of Sciences of Ukraine, 47 Lenin Ave., 61164 Kharkov, Ukraine, and Department of Chemistry, University of Arizona, Tucson, Arizona 85721
| | - Stepan G. Stepanian
- Department of Chemistry, University of Coimbra, P 3004-535 Coimbra, Portugal, Institute for Low-Temperature Physics & Engineering of the National Academy of Sciences of Ukraine, 47 Lenin Ave., 61164 Kharkov, Ukraine, and Department of Chemistry, University of Arizona, Tucson, Arizona 85721
| | - Ludwik Adamowicz
- Department of Chemistry, University of Coimbra, P 3004-535 Coimbra, Portugal, Institute for Low-Temperature Physics & Engineering of the National Academy of Sciences of Ukraine, 47 Lenin Ave., 61164 Kharkov, Ukraine, and Department of Chemistry, University of Arizona, Tucson, Arizona 85721
| | - Rui Fausto
- Department of Chemistry, University of Coimbra, P 3004-535 Coimbra, Portugal, Institute for Low-Temperature Physics & Engineering of the National Academy of Sciences of Ukraine, 47 Lenin Ave., 61164 Kharkov, Ukraine, and Department of Chemistry, University of Arizona, Tucson, Arizona 85721
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9
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Huang CL, Wu CC, Lien MH. Ab Initio Studies of Decarboxylations of the β-Keto Carboxylic Acids XCOCH2COOH (X = H, OH, and CH3). J Phys Chem A 1997. [DOI: 10.1021/jp9712664] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chun-Liang Huang
- Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan, R.O.C
| | - Chen-Chang Wu
- Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan, R.O.C
| | - Min-Hsiung Lien
- Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan, R.O.C
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10
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Ranganathan S, Gready JE. Hybrid Quantum and Molecular Mechanical (QM/MM) Studies on the Pyruvate to l-Lactate Interconversion in l-Lactate Dehydrogenase. J Phys Chem B 1997. [DOI: 10.1021/jp971051u] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Shoba Ranganathan
- Division of Biochemistry and Molecular Biology, John Curtin School of Medical Research, Australian National University, PO Box 334, Canberra ACT 2601, Australia
| | - Jill E. Gready
- Division of Biochemistry and Molecular Biology, John Curtin School of Medical Research, Australian National University, PO Box 334, Canberra ACT 2601, Australia
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11
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Ranganathan S, Gready JE. Mechanistic aspects of biological redox reactions involving NADH. Part 5.—AM1 transition-state studies for the pyruvate–L-lactate interconversion inL-lactate dehydrogenase. ACTA ACUST UNITED AC 1994. [DOI: 10.1039/ft9949002047] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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