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Ren FD, Liu YZ, Wang XL, Qiu LL, Meng ZH, Cheng X, Li YX. Strong External Electric Fields Reduce Explosive Sensitivity: A Theoretical Investigation into the Reaction Selectivity in NH2NO2∙∙∙NH3. Molecules 2023; 28:molecules28062586. [PMID: 36985558 PMCID: PMC10058811 DOI: 10.3390/molecules28062586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Revised: 03/04/2023] [Accepted: 03/07/2023] [Indexed: 03/18/2023] Open
Abstract
Controlling the selectivity of a detonation initiation reaction of explosive is essential to reduce sensitivity, and it seems impossible to reduce it by strengthening the external electric field. To verify this, the effects of external electric fields on the initiation reactions in NH2NO2∙∙∙NH3, a model system of the nitroamine explosive with alkaline additive, were investigated at the MP2/6-311++G(2d,p) and CCSD(T)/6-311++G(2d,p) levels. The concerted effect in the intermolecular hydrogen exchange is characterized by an index of the imaginary vibrations. Due to the weakened concerted effects by the electric field along the −x-direction opposite to the “reaction axis”, the dominant reaction changes from the intermolecular hydrogen exchange to 1,3-intramolecular hydrogen transference with the increase in the field strengths. Furthermore, the stronger the field strengths, the higher the barrier heights become, indicating the lower sensitivities. Therefore, by increasing the field strength and adjusting the orientation between the field and “reaction axis”, not only can the reaction selectivity be controlled, but the sensitivity can also be reduced, in particular under a super-strong field. Thus, a traditional concept, in which the explosive is dangerous under the super-strong external electric field, is theoretically broken. Compared to the neutral medium, a low sensitivity of the explosive with alkaline can be achieved under the stronger field. Employing atoms in molecules, reduced density gradient, and surface electrostatic potentials, the origin of the reaction selectivity and sensitivity change is revealed. This work provides a new idea for the technical improvement regarding adding the external electric field into the explosive system.
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Affiliation(s)
- Fu-De Ren
- School of Chemical Engineering and Technology, North University of China, Taiyuan 030051, China
- Correspondence: ; Tel.: +86-351-392-2117
| | - Ying-Zhe Liu
- State Key Laboratory of Fluorine and Nitrogen Chemicals, Xi’an Modern Chemistry Research Institute, Xi’an 710065, China
| | - Xiao-Lei Wang
- School of Chemical Engineering and Technology, North University of China, Taiyuan 030051, China
| | - Li-Li Qiu
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Zi-Hui Meng
- School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China
| | - Xiang Cheng
- School of Intelligent Engineering, Zhengzhou University of Aeronautics, Zhengzhou 450003, China
| | - Yong-Xiang Li
- School of Chemical Engineering and Technology, North University of China, Taiyuan 030051, China
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Thaler B, Meyer R, Heim P, Ranftl S, Pototschnig JV, Hauser AW, Koch M, Ernst WE. Conservation of Hot Thermal Spin-Orbit Population of 2P Atoms in a Cold Quantum Fluid Environment. J Phys Chem A 2019; 123:3977-3984. [PMID: 30973728 DOI: 10.1021/acs.jpca.9b02920] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The 0.4 K internal temperature of superfluid helium nanodroplets is believed to guarantee a corresponding ground-state population of dopant atoms and molecules inside this cryogenic matrix. We have recorded 6s ← 5p excitation spectra of indium atoms in helium droplets and found two absorption bands separated by about 2000 cm-1, a value close to the spin-orbit (SO) splitting of the In 2P ground state. The intensities of the bands agree with a thermal population of the 2P1/2 and 2P3/2 states at 870 K, the temperature of the In pick-up cell. Applying femtosecond pump-probe spectroscopy, we found the same dynamical response of the helium solvation shell after the photoexcitation of the two bands. He-density functional theory simulations of the excitation spectra are in agreement with the bimodal structure. Our findings show that the population of SO levels of hot dopants is conserved after pick-up inside the superfluid droplet. Implications for the interpretation of experiments on molecular aggregates are discussed.
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Affiliation(s)
- Bernhard Thaler
- Institute of Experimental Physics , Graz University of Technology , Petersgasse 16 , 8010 Graz , Austria
| | - Ralf Meyer
- Institute of Experimental Physics , Graz University of Technology , Petersgasse 16 , 8010 Graz , Austria
| | - Pascal Heim
- Institute of Experimental Physics , Graz University of Technology , Petersgasse 16 , 8010 Graz , Austria
| | - Sascha Ranftl
- Institute of Experimental Physics , Graz University of Technology , Petersgasse 16 , 8010 Graz , Austria
| | - Johann V Pototschnig
- Institute of Experimental Physics , Graz University of Technology , Petersgasse 16 , 8010 Graz , Austria
| | - Andreas W Hauser
- Institute of Experimental Physics , Graz University of Technology , Petersgasse 16 , 8010 Graz , Austria
| | - Markus Koch
- Institute of Experimental Physics , Graz University of Technology , Petersgasse 16 , 8010 Graz , Austria
| | - Wolfgang E Ernst
- Institute of Experimental Physics , Graz University of Technology , Petersgasse 16 , 8010 Graz , Austria
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Baranowska-Łączkowska A, Fernández B. Accurate calculation of optically induced birefringences in chiral systems using efficient polarized basis sets. Phys Chem Chem Phys 2018; 20:29717-29723. [PMID: 30460941 DOI: 10.1039/c8cp05648j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Using state-of-the-art ab initio methodology, we evaluate universal molecular parameters entering the expressions for various optically induced birefringences in chiral fluids. For this, we use the single and double excitation coupled cluster (CCSD) theory together with Dunning's augmented correlation consistent polarized basis sets of increasing size. As this is the first time these parameters are evaluated for chiral molecules using the CCSD approach, we choose possibly small test systems: a model asymmetric methane molecule, and (R)-fluoro-oxirane. With this choice, the convergence of the molecular parameters with the increase of the basis set size is investigated in detail. The results are compared to those obtained with the LPol-n (n = ds, dl, fs) and the ORP basis sets, and to the corresponding Density Functional Theory (DFT) counterparts. We can conclude that the DFT medium constant values are considerably far from coupled cluster, and therefore, aware of the known excellent performance of the CCSD method in the evaluation of various dynamic responses, we do not recommend the former methodology for accurate evaluation of the present properties. Regarding basis set convergence, the performace of the LPol-ds basis set is more efficient than that of the d-aug-cc-pVDZ set, and therefore, the former basis set can be a good choice when dealing with the study of larger systems.
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Sharipov F, Benites VJ. Transport coefficients of helium-neon mixtures at low density computed from ab initio potentials. J Chem Phys 2017; 147:224302. [DOI: 10.1063/1.5001711] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Affiliation(s)
- Felix Sharipov
- Departamento de Física, Universidade Federal do Paraná, Caixa Postal 19044, Curitiba 81531-990, Brazil
| | - Victor J. Benites
- Departamento de Física, Universidade Federal do Paraná, Caixa Postal 19044, Curitiba 81531-990, Brazil
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Meyer W, Frommhold L. Interacting He and Ar atoms: Revised theoretical interaction potential, dipole moment, and collision-induced absorption spectra. J Chem Phys 2015; 143:114313. [DOI: 10.1063/1.4931377] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Shirkov L, Makarewicz J. Does DFT-SAPT method provide spectroscopic accuracy? J Chem Phys 2015; 142:064102. [DOI: 10.1063/1.4907204] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Cybulski H, Baranowska-Łączkowska A, Henriksen C, Fernández B. Small and efficient basis sets for the evaluation of accurate interaction energies: aromatic molecule-argon ground-state intermolecular potentials and rovibrational states. J Phys Chem A 2014; 118:10288-97. [PMID: 25317989 DOI: 10.1021/jp508317z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
By evaluating a representative set of CCSD(T) ground state interaction energies for van der Waals dimers formed by aromatic molecules and the argon atom, we test the performance of the polarized basis sets of Sadlej et al. (J. Comput. Chem. 2005, 26, 145; Collect. Czech. Chem. Commun. 1988, 53, 1995) and the augmented polarization-consistent bases of Jensen (J. Chem. Phys. 2002, 117, 9234) in providing accurate intermolecular potentials for the benzene-, naphthalene-, and anthracene-argon complexes. The basis sets are extended by addition of midbond functions. As reference we consider CCSD(T) results obtained with Dunning's bases. For the benzene complex a systematic basis set study resulted in the selection of the (Z)Pol-33211 and the aug-pc-1-33321 bases to obtain the intermolecular potential energy surface. The interaction energy values and the shape of the CCSD(T)/(Z)Pol-33211 calculated potential are very close to the best available CCSD(T)/aug-cc-pVTZ-33211 potential with the former basis set being considerably smaller. The corresponding differences for the CCSD(T)/aug-pc-1-33321 potential are larger. In the case of the naphthalene-argon complex, following a similar study, we selected the (Z)Pol-3322 and aug-pc-1-333221 bases. The potentials show four symmetric absolute minima with energies of -483.2 cm(-1) for the (Z)Pol-3322 and -486.7 cm(-1) for the aug-pc-1-333221 basis set. To further check the performance of the selected basis sets, we evaluate intermolecular bound states of the complexes. The differences between calculated vibrational levels using the CCSD(T)/(Z)Pol-33211 and CCSD(T)/aug-cc-pVTZ-33211 benzene-argon potentials are small and for the lowest energy levels do not exceed 0.70 cm(-1). Such differences are substantially larger for the CCSD(T)/aug-pc-1-33321 calculated potential. For naphthalene-argon, bound state calculations demonstrate that the (Z)Pol-3322 and aug-pc-1-333221 potentials are of similar quality. The results show that these surfaces differ substantially from the available MP2/aug-cc-pVDZ potential. For the anthracene-argon complex it proved advantageous to calculate interaction energies by using the (Z)Pol and the aug-pc-1 basis sets, and we expect it to be increasingly so for complexes containing larger aromatic molecules.
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Affiliation(s)
- Hubert Cybulski
- Institute of Physics, Faculty of Physics, Astronomy and Informatics, Nicolaus Copernicus University , Grudziadzka 5, 87-100 Torun, Poland
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Buryak I, Frommhold L, Vigasin AA. Far-infrared collision-induced absorption in rare gas mixtures: Quantum and semi-classical calculations. J Chem Phys 2014. [DOI: 10.1063/1.4870716] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
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Baranowska-Łączkowska A, Fernández B. Basis sets for the evaluation of van der Waals complex interaction energies: Ne-N2 intermolecular potential and microwave spectrum. J Comput Chem 2014; 35:199-203. [PMID: 24375320 DOI: 10.1002/jcc.23483] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2013] [Revised: 08/27/2013] [Accepted: 10/06/2013] [Indexed: 11/09/2022]
Abstract
In order to obtain efficient basis sets for the evaluation of van der Waals complex intermolecular potentials, we carry out systematic basis set studies. For this, interaction energies at representative geometries on the potential energy surfaces are evaluated using the CCSD(T) correlation method and large polarized LPol-n and augmented polarization-consistent aug-pc-2 basis sets extended with different sets of midbond functions. On the basis of the root mean square errors calculated with respect to the values for the most accurate potentials available, basis sets are selected for fitting the corresponding interaction energies and getting analytical potentials. In this work, we study the Ne-N2 van der Waals complex and after the above procedure, the aug-pc-2-3321 and the LPol-ds-33221 basis set results are fitted. The obtained potentials are characterized by T-shaped global minima at distances between the Ne atom and the N2 center of mass of 3.39 Å, with interaction energies of -49.36 cm(-1) for the aug-pc-2-3321 surface and -50.28 cm(-1) for the LPol-ds-33221 surface. Both sets of results are in excellent agreement with the reference surface. To check the potentials further microwave transition frequencies are calculated that agree well with the experimental and the aV5Z-33221 values. The success of this study suggests that it is feasible to carry out similar accurate calculations of interaction energies and ro-vibrational spectra at reduced cost for larger complexes than has been possible hitherto.
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Baranowska-Łączkowska A, Łączkowski KZ. The ORP basis set designed for optical rotation calculations. J Comput Chem 2013; 34:2006-13. [DOI: 10.1002/jcc.23347] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2013] [Revised: 04/19/2013] [Accepted: 05/12/2013] [Indexed: 12/14/2022]
Affiliation(s)
| | - Krzysztof Z. Łączkowski
- Department of Chemical Technology and Pharmaceuticals; Faculty of Pharmacy, Nicolaus Copernicus University; 2 Jurasz St.; PL-85089; Bydgoszcz; Poland
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Baranowska-Łączkowska A, Chmielewska J, Pawłowski F, Rizzo A. Applicability of medium-size basis sets in calculation of electric dipole dynamic polarisabilities and first hyperpolarisabilities of non-interacting molecules. Mol Phys 2013. [DOI: 10.1080/00268976.2013.788747] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
| | - Joanna Chmielewska
- b Institute of Mathematics , Kazimierz Wielki University , Plac Weyssenhoffa 11, PL-85072 , Bydgoszcz , Poland
| | - Filip Pawłowski
- a Institute of Physics , Kazimierz Wielki University , Plac Weyssenhoffa 11, PL-85072 , Bydgoszcz , Poland
| | - Antonio Rizzo
- c Consiglio Nazionale delle Ricerche , Istituto per i Processi Chimico-Fisici (IPCF-CNR) , Pisa , Italy
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Baranowska-Łączkowska A, Bartkowiak W, Góra RW, Pawłowski F, Zaleśny R. On the performance of long-range-corrected density functional theory and reduced-size polarized LPol-n basis sets in computations of electric dipole (hyper)polarizabilities of π-conjugated molecules. J Comput Chem 2012; 34:819-26. [PMID: 23280818 DOI: 10.1002/jcc.23197] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2012] [Revised: 10/27/2012] [Accepted: 10/30/2012] [Indexed: 12/30/2022]
Abstract
Static longitudinal electric dipole (hyper)polarizabilities are calculated for six medium-sized π-conjugated organic molecules using recently developed LPol-n basis set family to assess their performance. Dunning's correlation-consistent basis sets of triple-ζ quality combined with MP2 method and supported by CCSD(T)/aug-cc-pVDZ results are used to obtain the reference values of analyzed properties. The same reference is used to analyze (hyper)polarizabilities predicted by selected exchange-correlation functionals, particularly those asymptotically corrected.
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Baranowska-Łączkowska A, Fernández B, Zaleśny R. New basis sets for the evaluation of interaction-induced electric properties in hydrogen-bonded complexes. J Comput Chem 2012; 34:275-83. [DOI: 10.1002/jcc.23124] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2012] [Revised: 08/22/2012] [Accepted: 08/24/2012] [Indexed: 01/03/2023]
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Cybulski H, Fernández B, Henriksen C, Felker PM. Ab initio ground state phenylacetylene–argon intermolecular potential energy surface and rovibrational spectrum. J Chem Phys 2012; 137:074305. [DOI: 10.1063/1.4742153] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Baranowska-Ła¸czkowska A, Fernández B, Rizzo A, Jansík B. New basis sets for the evaluation of the CO–Ne van der Waals complex interaction induced electric dipole moment and polarizability surfaces. Mol Phys 2012. [DOI: 10.1080/00268976.2012.702933] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
| | - Berta Fernández
- b Department of Physical Chemistry and Center for Research in Biological Chemistry and Molecular Materials (CIQUS) , University of Santiago de Compostela , E-15782 Santiago de Compostela, Spain
| | - Antonio Rizzo
- c Istituto per i Processi Chimico-Fisici del Consiglio Nazionale delle Ricerche , Area della Ricerca, via G. Moruzzi 1, loc. S. Cataldo, I-56124 Pisa , Italy
| | - Branislav Jansík
- d Teoretisk Kemi, Kemisk Institut , Aarhus Universitet , Langelandsgade , 140, 8000 Aarhus C , Denmark
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Baranowska-Łączkowska A, Łączkowski KZ, Fernández B. Accurate calculation of the intensity dependence of the refractive index using polarized basis sets. J Chem Phys 2012; 136:024302. [DOI: 10.1063/1.3674286] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Martinez-Casado R, Mallia G, Harrison NM. Ab initio calculation of the MgO(100) interaction with He and Ne: a HF + MP2 and HF + MP2(B3LYP) comparison. Chem Commun (Camb) 2011; 47:11630-2. [PMID: 21952116 DOI: 10.1039/c1cc14623h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Second order Rayleigh Schrödinger perturbation theory is applied to calculate the correlation energy contribution to the London dispersion interaction to approximate the interaction of the He and Ne with the MgO(100) surface; single particle orbitals using either Hartree-Fock theory or hybrid-exchange density functional theory are used as the reference state.
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Affiliation(s)
- Ruth Martinez-Casado
- Thomas Young Centre, Department of Chemistry, Imperial College London, South Kensington, London, SW7 2AZ, UK.
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Capelo SB, Baranowska-Łączkowska A, Fernández B. New bases for the evaluation of interaction energies: An ab initio study of the CO–Ne van der Waals complex intermolecular potential and ro-vibrational spectrum. Chem Phys 2011. [DOI: 10.1016/j.chemphys.2011.06.027] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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