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Claus JA, Bermúdez C, Vallet V, Margulès L, Goubet M. The hydration of an oxy-polycyclic aromatic compound: the case of naphthaldehyde. Phys Chem Chem Phys 2023; 25:23667-23677. [PMID: 37610078 DOI: 10.1039/d3cp02649c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/24/2023]
Abstract
The study of the intermolecular interactions of polycyclic aromatic compounds, considered as important pollutants of the Earth's atmosphere since they are emitted by the partial combustion of fuels, is essential to understand the formation and aging of their aerosols. In this study, the hydration of α-naphthaldehyde and β-naphthaldehyde isomers was investigated through a combination of Fourier transform microwave spectroscopy and quantum chemical calculations. Monohydrate structures were observed experimentally for both isomers, with two hydrate structures observed for β-naphthaldehyde and only one for α-naphthaldehyde, consistent with computational predictions. Analysis of the monohydrate structures indicated that the β-isomer exhibits higher hydrophilicity compared to the α-isomer, supported by electronic densities, hydration energies, and structural considerations. Further computational calculations were conducted to explore the planarity of the naphthaldehyde hydrates. Different levels of theory were employed, some of these revealing slight deviations from planarity in the hydrate structures. Low-frequency out-of-plane vibrational modes were examined, and the inertial defect was used to assess the planarity of the hydrates. The results suggested that the hydrates possess a predominantly planar structure, in agreement with the highest level of computational calculations and the absence of c-type transitions in the experimental spectra. Additionally, calculations were extended to dihydrate structures by attaching two water molecules to the naphthaldehyde isomers. The most stable dihydrate structures were predicted to be combinations of the observed monohydrate positions. However, experimental observation of the most stable dihydrate structures was challenging due to their very low vapour pressure, calling for complementary experiments using laser ablation nozzles.
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Affiliation(s)
- Jordan A Claus
- Univ. Lille, CNRS, UMR 8523 - PhLAM - Physique des Lasers, Atomes et Molécules, F-59000 Lille, France.
| | - Celina Bermúdez
- Univ. Lille, CNRS, UMR 8523 - PhLAM - Physique des Lasers, Atomes et Molécules, F-59000 Lille, France.
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias - I.U. CINQUIMA, Universidad de Valladolid, Valladolid 47011, Spain.
| | - Valérie Vallet
- Univ. Lille, CNRS, UMR 8523 - PhLAM - Physique des Lasers, Atomes et Molécules, F-59000 Lille, France.
| | - Laurent Margulès
- Univ. Lille, CNRS, UMR 8523 - PhLAM - Physique des Lasers, Atomes et Molécules, F-59000 Lille, France.
| | - Manuel Goubet
- Univ. Lille, CNRS, UMR 8523 - PhLAM - Physique des Lasers, Atomes et Molécules, F-59000 Lille, France.
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2
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Investigation of the Flame Retardant Properties of High-Strength Microcellular Flame Retardant/Polyurethane Composite Elastomers. Polymers (Basel) 2022; 14:polym14235055. [PMID: 36501450 PMCID: PMC9740006 DOI: 10.3390/polym14235055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 11/15/2022] [Accepted: 11/19/2022] [Indexed: 11/23/2022] Open
Abstract
Flame retardants (FRs) often reduce the mechanical properties of polymer materials, and FR/microcellular polyurethane elastomer (MPUE) composite materials have not been systemically studied. Hence, we conducted this study on FR/MPUE composites by using multiple liquid FRs and/or expandable graphite (EG). Compared with liquid flame retardants, the LOI of an expandable graphite/dimethyl methylphosphonate (EG/DMMP) (3:1) combination was significantly increased (~36.1%), and the vertical combustion grade reached V-0 without a dripping phenomenon. However, the corresponding tensile strength was decreased by 17.5%. With the incorporation of EG alone, although the corresponding LOI was not a match with that of DMMP/EG, there was no droplet phenomenon. In addition, even with 15 wt% of EG, there was no significant decline in the tensile strength. Cone calorimeter test results showed that PHRR, THR, PSPR, and TSR were significantly reduced, compared to the neat MPUE, when the EG content surpassed 10 wt%. The combustion process became more stable and thus the fire risk was highly reduced. It was found that flame retardancy and mechanical properties could be well balanced by adding EG alone. Our proposed strategy for synthesizing FR/MPUE composites with excellent flame retardancy and mechanical properties was easy, effective, low-cost and universal, which could have great practical significance in expanding the potential application fields of MPUEs.
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3
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Asselin P, Bruckhuisen J, Roucou A, Goubet M, Martin-Drumel MA, Jabri A, Belkhodja Y, Soulard P, Georges R, Cuisset A. Jet-cooled rovibrational spectroscopy of methoxyphenols using two complementary FTIR and QCL based spectrometers. J Chem Phys 2019; 151:194302. [PMID: 31757131 DOI: 10.1063/1.5128196] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Methoxyphenols (MPs) are a significant component of biomass burning emissions which mainly exists in our atmosphere in the gas phase where they contribute to the formation of secondary organic aerosols (SOAs). Rovibrational spectroscopy is a promising tool to monitor atmospheric MPs and infer their role in SOA formation. In this study, we bring a new perspective on the rovibrational analysis of MP isomers by taking advantage of two complementary devices combining jet-cooled environments and absorption spectroscopy: the Jet-AILES and the SPIRALES setups. Based on Q-branch frequency positions measured in the Jet-AILES Fourier-transform infrared (FTIR) spectra and guided by quantum chemistry calculations, we propose an extended vibrational and conformational analysis of the different MP isomers in their fingerprint region. Some modes such as far-IR out-of-plane -OH bending or mid-IR in-plane -CH bending allow us to assign individually all the stable conformers. Finally, using the SPIRALES setup with three different external cavity quantum cascade laser sources centered on the 930-990 cm-1 and the 1580-1690 cm-1 ranges, it was possible to proceed to the rovibrational analysis of the ν18 ring in-plane bending mode of the MP meta isomer providing a set of reliable excited state parameters, which confirms the correct assignment of two conformers. Interestingly, the observation of broad Q-branches without visible P- and R-branches in the region of the C-C ring stretching bands was interpreted as being probably due to a vibrational perturbation. These results highlight the complementarity of broadband FTIR and narrowband laser spectroscopic techniques to reveal the vibrational conformational signatures of atmospheric compounds over a large infrared spectral range.
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Affiliation(s)
- P Asselin
- Laboratoire MONARIS, UMR-CNRS 8233, Sciences Sorbonne Université, Paris, France and Université Pierre et Marie Curie, 75252 Paris, France
| | - J Bruckhuisen
- Laboratoire MONARIS, UMR-CNRS 8233, Sciences Sorbonne Université, Paris, France and Université Pierre et Marie Curie, 75252 Paris, France
| | - A Roucou
- Laboratoire de Physico-Chimie de l'Atmosphère, EA-4493, Université du Littoral Côte d'Opale, 59140 Dunkerque, France
| | - M Goubet
- Université de Lille, CNRS, UMR8523 PhLAM Physique des Lasers Atomes et Molécules, F-59000 Lille, France
| | - M-A Martin-Drumel
- Institut des Sciences Moléculaires d'Orsay (ISMO), CNRS, Univ. Paris-Sud, Université Paris-Saclay, F-91405 Orsay, France
| | - A Jabri
- Laboratoire MONARIS, UMR-CNRS 8233, Sciences Sorbonne Université, Paris, France and Université Pierre et Marie Curie, 75252 Paris, France
| | - Y Belkhodja
- Laboratoire MONARIS, UMR-CNRS 8233, Sciences Sorbonne Université, Paris, France and Université Pierre et Marie Curie, 75252 Paris, France
| | - P Soulard
- Laboratoire MONARIS, UMR-CNRS 8233, Sciences Sorbonne Université, Paris, France and Université Pierre et Marie Curie, 75252 Paris, France
| | - R Georges
- Université de Rennes, CNRS, IPR (Institut de Physique de Rennes) - UMR 6251, F-35000 Rennes, France
| | - A Cuisset
- Laboratoire de Physico-Chimie de l'Atmosphère, EA-4493, Université du Littoral Côte d'Opale, 59140 Dunkerque, France
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4
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Ampadu Boateng D, Word MD, Tibbetts KM. Probing Coherent Vibrations of Organic Phosphonate Radical Cations with Femtosecond Time-Resolved Mass Spectrometry. Molecules 2019; 24:E509. [PMID: 30708973 PMCID: PMC6384684 DOI: 10.3390/molecules24030509] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2019] [Revised: 01/25/2019] [Accepted: 01/29/2019] [Indexed: 12/25/2022] Open
Abstract
Organic phosphates and phosphonates are present in a number of cellular components that can be damaged by exposure to ionizing radiation. This work reports femtosecond time-resolved mass spectrometry (FTRMS) studies of three organic phosphonate radical cations that model the DNA sugar-phosphate backbone: dimethyl methylphosphonate (DMMP), diethyl methylphosphonate (DEMP), and diisopropyl methylphosphonate (DIMP). Upon ionization, each molecular radical cation exhibits unique oscillatory dynamics in its ion yields resulting from coherent vibrational excitation. DMMP has particularly well-resolved 45 fs ( 732 ± 28 cm - 1 ) oscillations with a weak feature at 610⁻650 cm - 1 , while DIMP exhibits bimodal oscillations with a period of ∼55 fs and two frequency features at 554 ± 28 and 670⁻720 cm - 1 . In contrast, the oscillations in DEMP decay too rapidly for effective resolution. The low- and high-frequency oscillations in DMMP and DIMP are assigned to coherent excitation of the symmetric O⁻P⁻O bend and P⁻C stretch, respectively. The observation of the same ionization-induced coherently excited vibrations in related molecules suggests a possible common excitation pathway in ionized organophosphorus compounds of biological relevance, while the distinct oscillatory dynamics in each molecule points to the potential use of FTRMS to distinguish among fragment ions produced by related molecules.
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Affiliation(s)
| | - Mi'Kayla D Word
- Department of Chemistry, Virginia Commonwealth University, Richmond, VA 23284, USA.
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5
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Neupane S, Barnes F, Barak S, Ninnemann E, Loparo Z, Masunov AE, Vasu SS. Shock Tube/Laser Absorption and Kinetic Modeling Study of Triethyl Phosphate Combustion. J Phys Chem A 2018; 122:3829-3836. [PMID: 29584936 DOI: 10.1021/acs.jpca.8b00800] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Pyrolysis and oxidation of triethyl phosphate (TEP) were performed in the reflected shock region at temperatures of 1462-1673 K and 1213-1508 K, respectively, and at pressures near 1.3 atm. CO concentration time histories during the experiments were measured using laser absorption spectroscopy at 4580.4 nm. Experimental CO yields were compared with model predictions using the detailed organophosphorus compounds (OPC) incineration mechanism from the Lawrence Livermore National Lab (LLNL). The mechanism significantly underpredicts CO yield in TEP pyrolysis. During TEP oxidation, predicted rate of CO formation was significantly slower than the experimental results. Therefore, a new improved kinetic model for TEP combustion was developed, which was built upon the AramcoMech2.0 mechanism for C0-C2 chemistry and the existing LLNL submechanism for phosphorus chemistry. Thermochemical data of 40 phosphorus (P)-containing species were reevaluated, either using recently published group values for P-containing species or by quantum chemical calculations (CBS-QB3). The new improved model is in better agreement with the experimental CO time histories within the temperature and pressure conditions tested in this study. Sensitivity analysis was used to identify important reactions affecting CO formation, and future experimental/theoretical studies on kinetic parameters of these reactions were suggested to further improve the model. To the best of our knowledge, this is the first study of TEP kinetics in a shock tube under these conditions and the first time-resolved laser-based species time history data during its pyrolysis and oxidation.
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6
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Ampadu Boateng D, Gutsev GL, Jena P, Tibbetts KM. Ultrafast coherent vibrational dynamics in dimethyl methylphosphonate radical cation. Phys Chem Chem Phys 2018; 20:4636-4640. [DOI: 10.1039/c7cp07261a] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Coherent vibrational dynamics drive dissociation of dimethyl methylphosphonate (DMMP) radical cation.
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Affiliation(s)
| | | | - Puru Jena
- Department of Physics
- Virginia Commonwealth University
- Richmond
- USA
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7
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Sambrook MR, Gass IA, Cragg PJ. Spectroscopic and inclusion properties of G-series chemical warfare agents and their simulants: a DFT study. Supramol Chem 2017. [DOI: 10.1080/10610278.2017.1401074] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
| | - Ian A. Gass
- School of Pharmacy and Biomolecular Sciences, Huxley Building, University of Brighton , Brighton, UK
| | - Peter J. Cragg
- School of Pharmacy and Biomolecular Sciences, Huxley Building, University of Brighton , Brighton, UK
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8
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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.
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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
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9
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Zhang C, Lu C, Wang Q, Ponder JW, Ren P. Polarizable Multipole-Based Force Field for Dimethyl and Trimethyl Phosphate. J Chem Theory Comput 2015; 11:5326-39. [PMID: 26574325 PMCID: PMC4768686 DOI: 10.1021/acs.jctc.5b00562] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
Phosphate groups are commonly observed
in biomolecules such as
nucleic acids and lipids. Due to their highly charged and polarizable
nature, modeling these compounds with classical force fields is challenging.
Using quantum mechanical studies and liquid-phase simulations, the
AMOEBA force field for dimethyl phosphate (DMP) ion and trimethyl
phosphate (TMP) has been developed. On the basis of ab initio calculations, it was found that ion binding and the solution environment
significantly impact both the molecular geometry and the energy differences
between conformations. Atomic multipole moments are derived from MP2/cc-pVQZ
calculations of methyl phosphates at several conformations with their
chemical environments taken into account. Many-body polarization is
handled via a Thole-style induction model using distributed atomic
polarizabilities. van der Waals parameters of phosphate and oxygen
atoms are determined by fitting to the quantum mechanical interaction
energy curves for water with DMP or TMP. Additional stretch-torsion
and angle-torsion coupling terms were introduced in order to capture
asymmetry in P–O bond lengths and angles due to the generalized
anomeric effect. The resulting force field for DMP and TMP is able
to accurately describe both the molecular structure and conformational
energy surface, including bond and angle variations with conformation,
as well as interaction of both species with water and metal ions.
The force field was further validated for TMP in the condensed phase
by computing hydration free energy, liquid density, and heat of vaporization.
The polarization behavior between liquid TMP and TMP in water is drastically
different.
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Affiliation(s)
- Changsheng Zhang
- Department of Biomedical Engineering, The University of Texas at Austin , Austin, Texas 78712, United States
| | - Chao Lu
- Department of Chemistry, Washington University in Saint Louis , Saint Louis, Missouri 63130, United States
| | - Qiantao Wang
- Department of Biomedical Engineering, The University of Texas at Austin , Austin, Texas 78712, United States
| | - Jay W Ponder
- Department of Chemistry, Washington University in Saint Louis , Saint Louis, Missouri 63130, United States
| | - Pengyu Ren
- Department of Biomedical Engineering, The University of Texas at Austin , Austin, Texas 78712, United States
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10
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Cuisset A, Gruet S, Pirali O, Chamaillé T, Mouret G. Synchrotron FT-FIR spectroscopy of nitro-derivatives vapors: new spectroscopic signatures of explosive taggants and degradation products. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 132:838-845. [PMID: 24975521 DOI: 10.1016/j.saa.2014.05.083] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2013] [Revised: 04/12/2014] [Accepted: 05/25/2014] [Indexed: 06/03/2023]
Abstract
We report on the first successful rovibrational study of gas phase mononitrotoluene and dinitrotoluene in the TeraHertz/Far-Infrared (THz/FIR) spectral domain. Using the AILES beamline of the synchrotron SOLEIL and a Fourier Transform spectrometer connected to multipass cells, the low-energy vibrational cross-sections of the different isomers of mononitrotoluene have been measured and compared to calculated spectra with the density functional theory including the anharmonic contribution. The active FIR modes of 2,4 and 2,6 dinitrotoluene have been assigned to the vibrational bands measured by Fourier Transform FIR spectroscopy of the gas-phase molecular cloud produced in an evaporating/recondensating system. This study highlights the selectivity of gas phase THz/FIR spectroscopy allowing an unambiguous recognition and discrimination of nitro-aromatic compounds used as explosive taggants.
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Affiliation(s)
- Arnaud Cuisset
- Laboratoire de Physico-Chimie de l'Atmosphère, EA-4493, Université du Littoral - Côte d'Opale, 59140 Dunkerque, France.
| | - Sébastien Gruet
- Synchrotron SOLEIL, L'orme des Merisiers, Saint-Aubin - BP48, 91192 Gif-sur-Yvette, France
| | - Olivier Pirali
- Synchrotron SOLEIL, L'orme des Merisiers, Saint-Aubin - BP48, 91192 Gif-sur-Yvette, France; Institut des Sciences Moléculaires d'Orsay, UMR-8214 CNRS, Université Paris-Sud, 91405 Orsay Cedex, France
| | - Thierry Chamaillé
- Institut des Sciences Moléculaires d'Orsay, UMR-8214 CNRS, Université Paris-Sud, 91405 Orsay Cedex, France
| | - Gaël Mouret
- Laboratoire de Physico-Chimie de l'Atmosphère, EA-4493, Université du Littoral - Côte d'Opale, 59140 Dunkerque, France
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11
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Accuracy of density functionals in the description of dispersion interactions and IR spectra of phosphates and phosphorylated compounds. J Mol Model 2014; 20:2426. [DOI: 10.1007/s00894-014-2426-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2014] [Accepted: 08/07/2014] [Indexed: 10/24/2022]
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12
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Housaindokht MR, Zamand N. A DFT study of associative and dissociative chemical adsorption of DMMP onto SnO2(110) surface nano-cluster. Struct Chem 2014. [DOI: 10.1007/s11224-014-0465-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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13
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Kahlau R, Dörfler T, Rössler EA. Secondary relaxations in a series of organic phosphate glasses revealed by dielectric spectroscopy. J Chem Phys 2013; 139:134504. [DOI: 10.1063/1.4822002] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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14
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Roldán ML, Ledesma AE, Raschi AB, Castillo MV, Romano E, Brandán SA. A new experimental and theoretical investigation on the structures of aminoethyl phosphonic acid in aqueous medium based on the vibrational spectra and DFT calculations. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2013.02.032] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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15
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Nguyen TM, Chang S, Condon B, Slopek R, Graves E, Yoshioka-Tarver M. Structural Effect of Phosphoramidate Derivatives on the Thermal and Flame Retardant Behaviors of Treated Cotton Cellulose. Ind Eng Chem Res 2013. [DOI: 10.1021/ie400180f] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Thach-Mien Nguyen
- United States Department of Agriculture, Agricultural Research Service, Southern Regional Research Center,
New Orleans, Louisiana 70124, United States
| | - SeChin Chang
- United States Department of Agriculture, Agricultural Research Service, Southern Regional Research Center,
New Orleans, Louisiana 70124, United States
| | - Brian Condon
- United States Department of Agriculture, Agricultural Research Service, Southern Regional Research Center,
New Orleans, Louisiana 70124, United States
| | - Ryan Slopek
- United States Department of Agriculture, Agricultural Research Service, Southern Regional Research Center,
New Orleans, Louisiana 70124, United States
| | - Elena Graves
- United States Department of Agriculture, Agricultural Research Service, Southern Regional Research Center,
New Orleans, Louisiana 70124, United States
| | - Megumi Yoshioka-Tarver
- United States Department of Agriculture, Agricultural Research Service, Southern Regional Research Center,
New Orleans, Louisiana 70124, United States
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16
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Bermudez VM. Investigation of the interaction of γ-Al2O3 with aqueous solutions of dimethyl methylphosphonate using infrared multiple internal reflection spectroscopy. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:1483-1489. [PMID: 23350945 DOI: 10.1021/la304744u] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The interaction of dilute solutions of dimethyl methylphosphonate (DMMP) in H(2)O with thin porous layers of γ-Al(2)O(3) has been studied under steady-state conditions using infrared multiple-internal-reflection spectroscopy. Upon the initial introduction of the DMMP solution to a previously H(2)O-saturated surface, DMMP diffuses into the porous layer and displaces weakly hydrogen-bonded H(2)O molecules. This is accompanied by hydrolysis of the γ-Al(2)O(3) to form Al(OH)(3) and/or AlO(OH). The P═O group of DMMP interacts predominantly with H(2)O and gives no clear indication of bonding to the oxide surface itself, from which it is inferred that the displacement of weakly adsorbed H(2)O results from the interaction of acidic Al-OH sites with the methoxy O atoms of DMMP. No hydrolysis of the DMMP, either in solution or in contact with the oxide, was detectable under the present conditions. The results have practical implications in the decontamination of materials following exposure to toxic reagents related to DMMP.
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Affiliation(s)
- V M Bermudez
- Electronics Science and Technology Division, Naval Research Laboratory, Washington, DC 20375-5347, United States.
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17
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Martin-Drumel M, Pirali O, Loquais Y, Falvo C, Bréchignac P. Lowest energy vibrational modes of some naphthalene derivatives: Azulene, quinoline, isoquinoline – Experiment and theory. Chem Phys Lett 2013. [DOI: 10.1016/j.cplett.2012.12.022] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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18
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Lee MT, Vishnyakov A, Gor GY, Neimark AV. Interactions of Phosphororganic Agents with Water and Components of Polyelectrolyte Membranes. J Phys Chem B 2011; 115:13617-23. [DOI: 10.1021/jp207469h] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Ming-Tsung Lee
- Department of Chemical and Biochemical Engineering, Rutgers, The State University of New Jersey, 98 Brett Road, Piscataway, New Jersey 08854, United States
| | - Aleksey Vishnyakov
- Department of Chemical and Biochemical Engineering, Rutgers, The State University of New Jersey, 98 Brett Road, Piscataway, New Jersey 08854, United States
| | - Gennady Yu. Gor
- Department of Chemical and Biochemical Engineering, Rutgers, The State University of New Jersey, 98 Brett Road, Piscataway, New Jersey 08854, United States
| | - Alexander V. Neimark
- Department of Chemical and Biochemical Engineering, Rutgers, The State University of New Jersey, 98 Brett Road, Piscataway, New Jersey 08854, United States
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19
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Smirnova IN, Cuisset A, Hindle F, Mouret G, Bocquet R, Pirali O, Roy P. Gas-Phase Synchrotron FTIR Spectroscopy of Weakly Volatile Alkyl Phosphonate and Alkyl Phosphate Compounds: Vibrational and Conformational Analysis in the Terahertz/Far-IR Spectral Domain. J Phys Chem B 2010; 114:16936-47. [DOI: 10.1021/jp108421c] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- I. N. Smirnova
- Laboratoire de Physico-Chimie de l’Atmosphère, EAC CNRS 4493, Université du Littoral Côte d’Opale, 189 A Ave. Maurice Schumann, 59140 Dunkerque, France; Physics Department, M. V. Lomonosov Moscow State University, Moscow, Russia; Ligne AILES (Advance InfraRed Line Exploited for Spectroscopy), Synchrotron SOLEIL, L’Orme des Merisiers, Saint Aubin, BP 48, 91192 Gif-sur-Yvette, France; and Institut des Sciences Moléculaires d’Orsay, UMR 8214, Bâtiment 210, Université Paris-Sud, 91405 Orsay Cedex, France
| | - A. Cuisset
- Laboratoire de Physico-Chimie de l’Atmosphère, EAC CNRS 4493, Université du Littoral Côte d’Opale, 189 A Ave. Maurice Schumann, 59140 Dunkerque, France; Physics Department, M. V. Lomonosov Moscow State University, Moscow, Russia; Ligne AILES (Advance InfraRed Line Exploited for Spectroscopy), Synchrotron SOLEIL, L’Orme des Merisiers, Saint Aubin, BP 48, 91192 Gif-sur-Yvette, France; and Institut des Sciences Moléculaires d’Orsay, UMR 8214, Bâtiment 210, Université Paris-Sud, 91405 Orsay Cedex, France
| | - F. Hindle
- Laboratoire de Physico-Chimie de l’Atmosphère, EAC CNRS 4493, Université du Littoral Côte d’Opale, 189 A Ave. Maurice Schumann, 59140 Dunkerque, France; Physics Department, M. V. Lomonosov Moscow State University, Moscow, Russia; Ligne AILES (Advance InfraRed Line Exploited for Spectroscopy), Synchrotron SOLEIL, L’Orme des Merisiers, Saint Aubin, BP 48, 91192 Gif-sur-Yvette, France; and Institut des Sciences Moléculaires d’Orsay, UMR 8214, Bâtiment 210, Université Paris-Sud, 91405 Orsay Cedex, France
| | - G. Mouret
- Laboratoire de Physico-Chimie de l’Atmosphère, EAC CNRS 4493, Université du Littoral Côte d’Opale, 189 A Ave. Maurice Schumann, 59140 Dunkerque, France; Physics Department, M. V. Lomonosov Moscow State University, Moscow, Russia; Ligne AILES (Advance InfraRed Line Exploited for Spectroscopy), Synchrotron SOLEIL, L’Orme des Merisiers, Saint Aubin, BP 48, 91192 Gif-sur-Yvette, France; and Institut des Sciences Moléculaires d’Orsay, UMR 8214, Bâtiment 210, Université Paris-Sud, 91405 Orsay Cedex, France
| | - R. Bocquet
- Laboratoire de Physico-Chimie de l’Atmosphère, EAC CNRS 4493, Université du Littoral Côte d’Opale, 189 A Ave. Maurice Schumann, 59140 Dunkerque, France; Physics Department, M. V. Lomonosov Moscow State University, Moscow, Russia; Ligne AILES (Advance InfraRed Line Exploited for Spectroscopy), Synchrotron SOLEIL, L’Orme des Merisiers, Saint Aubin, BP 48, 91192 Gif-sur-Yvette, France; and Institut des Sciences Moléculaires d’Orsay, UMR 8214, Bâtiment 210, Université Paris-Sud, 91405 Orsay Cedex, France
| | - O. Pirali
- Laboratoire de Physico-Chimie de l’Atmosphère, EAC CNRS 4493, Université du Littoral Côte d’Opale, 189 A Ave. Maurice Schumann, 59140 Dunkerque, France; Physics Department, M. V. Lomonosov Moscow State University, Moscow, Russia; Ligne AILES (Advance InfraRed Line Exploited for Spectroscopy), Synchrotron SOLEIL, L’Orme des Merisiers, Saint Aubin, BP 48, 91192 Gif-sur-Yvette, France; and Institut des Sciences Moléculaires d’Orsay, UMR 8214, Bâtiment 210, Université Paris-Sud, 91405 Orsay Cedex, France
| | - P. Roy
- Laboratoire de Physico-Chimie de l’Atmosphère, EAC CNRS 4493, Université du Littoral Côte d’Opale, 189 A Ave. Maurice Schumann, 59140 Dunkerque, France; Physics Department, M. V. Lomonosov Moscow State University, Moscow, Russia; Ligne AILES (Advance InfraRed Line Exploited for Spectroscopy), Synchrotron SOLEIL, L’Orme des Merisiers, Saint Aubin, BP 48, 91192 Gif-sur-Yvette, France; and Institut des Sciences Moléculaires d’Orsay, UMR 8214, Bâtiment 210, Université Paris-Sud, 91405 Orsay Cedex, France
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Mandal D, Mondal B, Das AK. Isomerization and Decomposition of a Model Nerve Agent: A Computational Analysis of the Reaction Energetics and Kinetics of Dimethyl Ethylphosphonate. J Phys Chem A 2010; 114:10717-25. [DOI: 10.1021/jp106270d] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Debasish Mandal
- Department of Spectroscopy, Indian association for the Cultivation of Science, Jadavpur, Kolkata 700 032, India
| | - Bhaskar Mondal
- Department of Spectroscopy, Indian association for the Cultivation of Science, Jadavpur, Kolkata 700 032, India
| | - Abhijit K. Das
- Department of Spectroscopy, Indian association for the Cultivation of Science, Jadavpur, Kolkata 700 032, India
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21
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Cuisset A, Nanobashvili L, Smirnova I, Bocquet R, Hindle F, Mouret G, Pirali O, Roy P, Sadovskií DA. Far-infrared high resolution synchrotron FTIR spectroscopy of the ν11 bending vibrational fundamental transition of dimethylsulfoxyde. Chem Phys Lett 2010. [DOI: 10.1016/j.cplett.2010.04.042] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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22
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Yang L, Shroll RM, Zhang J, Lourderaj U, Hase WL. Theoretical Investigation of Mechanisms for the Gas-Phase Unimolecular Decomposition of DMMP. J Phys Chem A 2009; 113:13762-71. [DOI: 10.1021/jp904232n] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Li Yang
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, and Spectral Sciences, Incorporated, 4 Fourth Avenue, Burlington, Massachusetts 01803-3304
| | - Robert M. Shroll
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, and Spectral Sciences, Incorporated, 4 Fourth Avenue, Burlington, Massachusetts 01803-3304
| | - Jiaxu Zhang
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, and Spectral Sciences, Incorporated, 4 Fourth Avenue, Burlington, Massachusetts 01803-3304
| | - U. Lourderaj
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, and Spectral Sciences, Incorporated, 4 Fourth Avenue, Burlington, Massachusetts 01803-3304
| | - William L. Hase
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409, and Spectral Sciences, Incorporated, 4 Fourth Avenue, Burlington, Massachusetts 01803-3304
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Dodd JA, Baker PM, Hwang ES, Sporleder D, Stearns JA, Chambreau SD, Braunstein M, Conforti PF. Hyperthermal atomic oxygen source for near-space simulation experiments. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2009; 80:093104. [PMID: 19791929 DOI: 10.1063/1.3212676] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
A hyperthermal atomic oxygen (AO) beam facility has been developed to investigate the collisions of high-velocity AO atoms with vapor-phase counterflow. Application of 4.5 kW, 2.4 GHz microwave power in the source chamber creates a continuous discharge in flowing O(2) gas. The O(2) feedstock is introduced into the source chamber in a vortex flow to constrain the plasma to the center region, with the chamber geometry promoting resonant excitation of the TM(011) mode to localize the energy deposition in the vicinity of the aluminum nitride (AlN) expansion nozzle. The approximately 3500 K environment serves to dissociate the O(2), resulting in an effluent consisting of 40% AO by number density. Downstream of the nozzle, a silicon carbide (SiC) skimmer selects the center portion of the discharge effluent, prior to the expansion reaching the first shock front and rethermalizing, creating a beam with a derived 2.5 km s(-1) velocity. Differential pumping of the skimmer chamber, an optional intermediate chamber and reaction chamber maintains a reaction chamber pressure in the mid-10(-6) to mid-10(-5) Torr range. The beam has been characterized with regard to total AO beam flux, O(2) dissociation fraction, and AO spatial profile using time-of-flight mass spectrometric and Kapton-H erosion measurements. A series of reactions AO+C(n)H(2n) (n=2-4) has been studied under single-collision conditions using mass spectrometric product detection, and at higher background pressure detecting dispersed IR emissions from primary and secondary products using a step-scan Michelson interferometer. In a more recent AO crossed-beam experiment, number densities and predicted IR emission intensities have been modeled using the direct simulation Monte Carlo technique. The results have been used to guide the experimental conditions. IR emission intensity predictions are compared to detected signal levels to estimate absolute reaction cross sections.
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Affiliation(s)
- James A Dodd
- Space Vehicles Directorate, Air Force Research Laboratory, Hanscom AFB, Massachusetts 01731, USA
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Sokkalingam N, Kamath G, Coscione M, Potoff JJ. Extension of the Transferable Potentials for Phase Equilibria Force Field to Dimethylmethyl Phosphonate, Sarin, and Soman. J Phys Chem B 2009; 113:10292-7. [DOI: 10.1021/jp903110e] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Nandhini Sokkalingam
- Department of Chemical Engineering and Materials Science, Wayne State University, Detroit, Michigan 48202
| | - Ganesh Kamath
- Department of Chemical Engineering and Materials Science, Wayne State University, Detroit, Michigan 48202
| | - Maria Coscione
- Department of Chemical Engineering and Materials Science, Wayne State University, Detroit, Michigan 48202
| | - Jeffrey J. Potoff
- Department of Chemical Engineering and Materials Science, Wayne State University, Detroit, Michigan 48202
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Recent Developments of an Opto-Electronic THz Spectrometer for High-Resolution Spectroscopy. SENSORS 2009; 9:9039-57. [PMID: 22291552 PMCID: PMC3260629 DOI: 10.3390/s91109039] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2009] [Revised: 10/13/2009] [Accepted: 10/29/2009] [Indexed: 11/25/2022]
Abstract
A review is provided of sources and detectors that can be employed in the THz range before the description of an opto-electronic source of monochromatic THz radiation. The realized spectrometer has been applied to gas phase spectroscopy. Air-broadening coefficients of HCN are determined and the insensitivity of this technique to aerosols is demonstrated by the analysis of cigarette smoke. A multiple pass sample cell has been used to obtain a sensitivity improvement allowing transitions of the volatile organic compounds to be observed. A solution to the frequency metrology is presented and promises to yield accurate molecular line center measurements.
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