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Houston PL, Qu C, Yu Q, Pandey P, Conte R, Nandi A, Bowman JM, Kukolich SG. Formic Acid-Ammonia Heterodimer: A New Δ-Machine Learning CCSD(T)-Level Potential Energy Surface Allows Investigation of the Double Proton Transfer. J Chem Theory Comput 2024; 20:1821-1828. [PMID: 38382541 DOI: 10.1021/acs.jctc.3c01273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2024]
Abstract
The formic acid-ammonia dimer is an important example of a hydrogen-bonded complex in which a double proton transfer can occur. Its microwave spectrum has recently been reported and rotational constants and quadrupole coupling constants were determined. Calculated estimates of the double-well barrier and the internal barriers to rotation were also reported. Here, we report a full-dimensional potential energy surface (PES) for this complex, using two closely related Δ-machine learning methods to bring it to the CCSD(T) level of accuracy. The PES dissociates smoothly and accurately. Using a 2d quantum model the ground vibrational-state tunneling splitting is estimated to be less than 10-4 cm-1. The dipole moment along the intrinsic reaction coordinate is calculated along with a Mullikan charge analysis and supports the mildly ionic character of the minimum and strongly ionic character at the double-well barrier.
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Affiliation(s)
- Paul L Houston
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, U.S.A. and Department of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Chen Qu
- Independent Researcher, Toronto, Ontario M9B0E3, Canada
| | - Qi Yu
- Department of Chemistry and Cherry L. Emerson Center for Scientific Computation, Emory University, Atlanta, Georgia 30322, United States
| | - Priyanka Pandey
- Department of Chemistry and Cherry L. Emerson Center for Scientific Computation, Emory University, Atlanta, Georgia 30322, United States
| | - Riccardo Conte
- Dipartimento di Chimica, Università Degli Studi di Milano, Via Golgi 19, Milano 20133, Italy
| | - Apurba Nandi
- Department of Chemistry and Cherry L. Emerson Center for Scientific Computation, Emory University, Atlanta, Georgia 30322, United States
- Department of Physics and Materials Science, University of Luxembourg, Luxembourg City L-1511, Luxembourg
| | - Joel M Bowman
- Department of Chemistry and Cherry L. Emerson Center for Scientific Computation, Emory University, Atlanta, Georgia 30322, United States
| | - Stephen G Kukolich
- Department of Chemistry and Biochemistry, University of Arizona, 1306 E. University Avenue, Tucson, Arizona 85721, United States
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Proton-Conducting Biopolymer Electrolytes Based on Carboxymethyl Cellulose Doped with Ammonium Formate. Polymers (Basel) 2022; 14:polym14153019. [PMID: 35893982 PMCID: PMC9330413 DOI: 10.3390/polym14153019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 07/05/2022] [Accepted: 07/06/2022] [Indexed: 02/01/2023] Open
Abstract
In this work, CMC-AFT biopolymer electrolytes system was developed using Carboxymethyl cellulose (CMC) doped with varied amount (10-50 wt.%) of ammonium formate (AFT) in order to study the effect of AFT on the biopolymer-salt system. The chemical structure of the biopolymer was studied using Fourier-Transform infrared (FTIR) and X-ray diffraction (XRD). The interaction between the COO- of CMC and the weakly-bound H+ of NH4+ AFT occurred at 1573 cm-1 as seen in FTIR analysis and the amorphous phase was found to increase with the addition of AFT as seen from XRD pattern. Both FTIR and XRD testing indicates that the AFT had disrupted the CMC crystalline structure. The ionic conductivity of the CMC-AFT biopolymer electrolytes increases and achieved the highest value of 1.47 × 10-4 S·cm-1 with the addition of AFT. The impedance measurement showed that the capacitive and resistive behavior inside the biopolymer diminished when 50 wt.% of AFT was added. Dielectric analysis confirmed the increased number of charge carriers is due to the increase in AFT composition. Further dielectric analysis showed the occurrence of conductivity relaxation peak thus affirmed the charge carriers' ability to travel further to a longer distances when AFT composition increases from 10 to 50 wt.%. The dielectric properties confirmed the non-Debye behavior of the CMC-AFT biopolymer electrolytes.
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Burke DJ, Puletti F, Woods PM, Viti S, Slater B, Brown WA. Trapping and desorption of complex organic molecules in water at 20 K. J Chem Phys 2015; 143:164704. [PMID: 26520540 DOI: 10.1063/1.4934264] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The formation, chemical, and thermal processing of complex organic molecules (COMs) is currently a topic of much interest in interstellar chemistry. The isomers glycolaldehyde, methyl formate, and acetic acid are particularly important because of their role as pre-biotic species. It is becoming increasingly clear that many COMs are formed within interstellar ices which are dominated by water. Hence, the interaction of these species with water ice is crucially important in dictating their behaviour. Here, we present the first detailed comparative study of the adsorption and thermal processing of glycolaldehyde, methyl formate, and acetic acid adsorbed on and in water ices at astrophysically relevant temperatures (20 K). We show that the functional group of the isomer dictates the strength of interaction with water ice, and hence the resulting desorption and trapping behaviour. Furthermore, the strength of this interaction directly affects the crystallization of water, which in turn affects the desorption behaviour. Our detailed coverage and composition dependent data allow us to categorize the desorption behaviour of the three isomers on the basis of the strength of intermolecular and intramolecular interactions, as well as the natural sublimation temperature of the molecule. This categorization is extended to other C, H, and O containing molecules in order to predict and describe the desorption behaviour of COMs from interstellar ices.
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Affiliation(s)
- Daren J Burke
- Division of Chemistry, University of Sussex, Falmer, Brighton BN1 9QJ, United Kingdom
| | - Fabrizio Puletti
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
| | - Paul M Woods
- Astrophysics Research Centre, School of Mathematics and Physics, Queen's University Belfast, University Road, Belfast BT7 1NN, United Kingdom
| | - Serena Viti
- Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom
| | - Ben Slater
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, United Kingdom
| | - Wendy A Brown
- Division of Chemistry, University of Sussex, Falmer, Brighton BN1 9QJ, United Kingdom
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Burke DJ, Puletti F, Woods PM, Viti S, Slater B, Brown WA. Adsorption and Thermal Processing of Glycolaldehyde, Methyl Formate, and Acetic Acid on Graphite at 20 K. J Phys Chem A 2015; 119:6837-49. [DOI: 10.1021/acs.jpca.5b04010] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Daren J. Burke
- Division of Chemistry, University of Sussex, Falmer, Brighton BN1 9QJ, U.K
| | - Fabrizio Puletti
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K
| | - Paul M. Woods
- Astrophysics Research
Centre, School of Mathematics and Physics, Queen’s University Belfast, University Road, Belfast BT7 1NN, U.K
| | - Serena Viti
- Department of Physics
and Astronomy, University College London, Gower Street, London WC1E 6BT, U.K
| | - Ben Slater
- Department of Chemistry, University College London, 20 Gordon Street, London WC1H 0AJ, U.K
| | - Wendy A. Brown
- Division of Chemistry, University of Sussex, Falmer, Brighton BN1 9QJ, U.K
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Lignell A, Gudipati MS. Mixing of the Immiscible: Hydrocarbons in Water-Ice near the Ice Crystallization Temperature. J Phys Chem A 2014; 119:2607-13. [DOI: 10.1021/jp509513s] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Antti Lignell
- Ice Spectroscopy Lab, Science
Division, Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, California 91109, United States
| | - Murthy S. Gudipati
- Ice Spectroscopy Lab, Science
Division, Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, California 91109, United States
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Kania R, Malongwe JK, Nachtigallová D, Krausko J, Gladich I, Roeselová M, Heger D, Klán P. Spectroscopic Properties of Benzene at the Air–Ice Interface: A Combined Experimental–Computational Approach. J Phys Chem A 2014; 118:7535-47. [DOI: 10.1021/jp501094n] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Rafał Kania
- RECETOX,
Faculty of Science, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
| | | | - Dana Nachtigallová
- Institute
of Organic Chemistry and Biochemistry, AS CR, v.v.i., Flemingovo nam. 2, 166 10 Prague, Czech Republic
| | - Ján Krausko
- RECETOX,
Faculty of Science, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
- Department
of Chemistry, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
| | - Ivan Gladich
- International
School for Advanced Studies (SISSA), Via Bonomea 265, I-34136, Trieste, Italy
| | - Martina Roeselová
- Institute
of Organic Chemistry and Biochemistry, AS CR, v.v.i., Flemingovo nam. 2, 166 10 Prague, Czech Republic
| | - Dominik Heger
- RECETOX,
Faculty of Science, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
- Department
of Chemistry, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
| | - Petr Klán
- RECETOX,
Faculty of Science, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
- Department
of Chemistry, Masaryk University, Kamenice 5, 625 00, Brno, Czech Republic
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Romanias MN, Zogka AG, Papadimitriou VC, Papagiannakopoulos P. Uptake Measurements of Acetic Acid on Ice and Nitric Acid-Doped Thin Ice Films over Upper Troposphere/Lower Stratosphere Temperatures. J Phys Chem A 2012; 116:2198-208. [DOI: 10.1021/jp205196t] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Manolis N. Romanias
- Laboratory
of Photochemistry and Kinetics, Department
of Chemistry, University of Crete, 71003
Heraklion, Crete, Greece
| | - Antonia G. Zogka
- Laboratory
of Photochemistry and Kinetics, Department
of Chemistry, University of Crete, 71003
Heraklion, Crete, Greece
| | - Vassileios C. Papadimitriou
- Laboratory
of Photochemistry and Kinetics, Department
of Chemistry, University of Crete, 71003
Heraklion, Crete, Greece
| | - Panos Papagiannakopoulos
- Laboratory
of Photochemistry and Kinetics, Department
of Chemistry, University of Crete, 71003
Heraklion, Crete, Greece
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Kurková R, Ray D, Nachtigallová D, Klán P. Chemistry of small organic molecules on snow grains: the applicability of artificial snow for environmental studies. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2011; 45:3430-3436. [PMID: 21366308 DOI: 10.1021/es104095g] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The utilization of artificial snow for environmentally relevant (photo)chemical studies was systematically investigated. Contaminated snow samples were prepared by various methods: by shock freezing of the aqueous solutions sprayed into liquid nitrogen or inside a large walk-in cold chamber at -35 °C, or by adsorption of gaseous contaminants on the surface of artificially prepared pure or natural urban snow. The specific surface area of artificial snow grains produced in liquid nitrogen was determined using valerophenone photochemistry (400-440 cm(2) g(-1)) to estimate the surface coverage by small hydrophobic organic contaminants. The dynamics of recombination/dissociation (cage effect) of benzyl radical pairs, photochemically produced from 4-methyldibenzyl ketone on the snow surface, was investigated. The initial ketone loading, c = 10(-6)-10(-8) mol kg(-1), only about 1-2 orders of magnitude higher than the contaminant concentrations commonly found in nature, was already well below monolayer coverage. We found that the efficiency of out-of-cage reactions decreased at much higher temperatures than those previously determined for frozen solutions; however, the cage effect was essentially the same no matter what technique of snow production or ketone deposition/uptake was used, including the experiments with collected natural snow. The experimental observation that the contaminant molecules are initially self-associated even at the lowest concentrations was supported by DFT calculations. We conclude that, contrary to frozen aqueous solutions, in which the impurities reside in a 3D cage (micropocket), contaminant molecules located on the artificial snow grain surface at low concentrations can be visualized in terms of a 2D cage. Artificial snow thus represents a readily available study matrix that can be used to emulate the natural chemical processes of trace contaminants occurring in natural snow.
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Affiliation(s)
- Romana Kurková
- Research Centre for Toxic Compounds in the Environment, Faculty of Science, Masaryk University , Kamenice 3, 62500 Brno, Czech Republic
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Romanias MN, Zogka AG, Stefanopoulos VG, Papadimitriou VC, Papagiannakopoulos P. Uptake of Formic Acid on Thin Ice Films and on Ice Doped with Nitric Acid between 195 and 211 K. Chemphyschem 2010; 11:4042-52. [DOI: 10.1002/cphc.201000434] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Manolis N. Romanias
- Laboratory of Photochemistry and Kinetics, Department of Chemistry, University of Crete, 71003 Heraklion, Crete (Greece), Fax: (+30) 2810‐545‐001
| | - Antonia G. Zogka
- Laboratory of Photochemistry and Kinetics, Department of Chemistry, University of Crete, 71003 Heraklion, Crete (Greece), Fax: (+30) 2810‐545‐001
| | - Vassileios G. Stefanopoulos
- Laboratory of Photochemistry and Kinetics, Department of Chemistry, University of Crete, 71003 Heraklion, Crete (Greece), Fax: (+30) 2810‐545‐001
| | - Vassileios C. Papadimitriou
- Laboratory of Photochemistry and Kinetics, Department of Chemistry, University of Crete, 71003 Heraklion, Crete (Greece), Fax: (+30) 2810‐545‐001
| | - Panos Papagiannakopoulos
- Laboratory of Photochemistry and Kinetics, Department of Chemistry, University of Crete, 71003 Heraklion, Crete (Greece), Fax: (+30) 2810‐545‐001
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Yan H, Chu LT. Interactions of oxalic acid and ice on Cu surface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2008; 24:9410-9420. [PMID: 18671415 DOI: 10.1021/la8008706] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
The interactions between oxalic acid (C 2H 2O 4) and H 2O on a polycrystalline Cu surface have been investigated by reflection-absorption infrared spectroscopy (RAIRS) and temperature-programmed desorption (TPD) methods. The desorption of H 2O and C 2H 2O 4 was studied; we found that the ice desorption temperature increases with the ice-film thickness. Desorption of the C 2H 2O 4 layer involves a structural modification and sublimation. The H 2O/C 2H 2O 4 and C 2H 2O 4/H 2O interfaces and the codeposited C 2H 2O 4+H 2O were prepared on the Cu surface by varying deposition sequences of gaseous C 2H 2O 4 and H 2O at 155 K. We found that the interaction between ice and C 2H 2O 4 does not lead to the H 2O-induced deprotonation of C 2H 2O 4 in a temperature range 155-283 K. However, H-bonding interactions between H 2O and C 2H 2O 4 can lead to the formation of a metastable oxalic acid-ice complex in the C 2H 2O 4/H 2O and C 2H 2O 4+H 2O systems during the TPD process. Desorption of H 2O from the C 2H 2O 4/H 2O/Cu system is suggested to involve the diffusion of H 2O through the top C 2H 2O 4 layer. H 2O desorption is followed by a rearrangement of C 2H 2O 4 to form a C 2H 2O 4 adlayer on Cu in the C 2H 2O 4+H 2O system. These experimental findings suggest that C 2H 2O 4 is not ionized on snow and ice in the polar boundary layer and at upper tropospheric temperatures ( approximately 240 K).
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Affiliation(s)
- Hui Yan
- Wadsworth Center, New York State Health Department, Albany, New York 12201-0509, USA
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