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Chakraborty R, de Moraes MMF, Boguslawski K, Nowak A, Świerczyński J, Tecmer P. Toward Reliable Dipole Moments without Single Excitations: The Role of Orbital Rotations and Dynamical Correlation. J Chem Theory Comput 2024; 20:4689-4702. [PMID: 38809012 PMCID: PMC11171297 DOI: 10.1021/acs.jctc.4c00471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2024] [Revised: 05/15/2024] [Accepted: 05/17/2024] [Indexed: 05/30/2024]
Abstract
The dipole moment is a crucial molecular property linked to a molecular system's bond polarity and overall electronic structure. To that end, the electronic dipole moment, which results from the electron density of a system, is often used to assess the accuracy and reliability of new electronic structure methods. This work analyses electronic dipole moments computed with the pair coupled cluster doubles (pCCD) ansätze and its linearized coupled cluster (pCCD-LCC) corrections using the canonical Hartree-Fock and pCCD-optimized (localized) orbital bases. The accuracy of pCCD-based dipole moments is assessed against experimental and CCSD(T) reference values using relaxed and unrelaxed density matrices and different basis set sizes. Our test set comprises molecules of various bonding patterns and electronic structures, exposing pCCD-based methods to a wide range of electron correlation effects. Additionally, we investigate the performance of pCCD-in-DFT dipole moments of some model complexes. Finally, our work indicates the importance of orbital relaxation in the pCCD model and shows the limitations of the linearized couple cluster corrections in predicting electronic dipole moments of multiple-bonded systems. Most importantly, pCCD with a linearized CCD correction can reproduce the dipole moment surfaces in singly bonded molecules, which are comparable to the multireference ones.
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Affiliation(s)
- Rahul Chakraborty
- Institute
of Physics, Faculty of Physics, Astronomy, and Informatics, Nicolaus Copernicus University in Toruń, Grudziadzka 5, 87-100 Toruń, Poland
| | - Matheus Morato F. de Moraes
- Institute
of Physics, Faculty of Physics, Astronomy, and Informatics, Nicolaus Copernicus University in Toruń, Grudziadzka 5, 87-100 Toruń, Poland
| | - Katharina Boguslawski
- Institute
of Physics, Faculty of Physics, Astronomy, and Informatics, Nicolaus Copernicus University in Toruń, Grudziadzka 5, 87-100 Toruń, Poland
| | - Artur Nowak
- Institute
of Physics, Faculty of Physics, Astronomy, and Informatics, Nicolaus Copernicus University in Toruń, Grudziadzka 5, 87-100 Toruń, Poland
| | - Julian Świerczyński
- Institute
of Engineering and Technology, Faculty of Physics, Astronomy, and
Informatics, Nicolaus Copernicus University
in Toruń, Grudzia̧dzka
5, 87-100 Toruń, Poland
| | - Paweł Tecmer
- Institute
of Physics, Faculty of Physics, Astronomy, and Informatics, Nicolaus Copernicus University in Toruń, Grudziadzka 5, 87-100 Toruń, Poland
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2
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Zhour K, Daouli A, Postnikov A, Hasnaoui A, Badawi M. Potential of nanostructured carbon materials for iodine detection in realistic environments revealed by first-principles calculations. Phys Chem Chem Phys 2023; 25:26461-26474. [PMID: 37752811 DOI: 10.1039/d3cp02205f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/28/2023]
Abstract
In the context of effective detection of iodine species (I2, CH3I) formed in nuclear power plants and nuclear fuel reprocessing facilities, we perform a comparative study of the potential sensing performance of four expectedly promising 2D materials (8-Pmmn borophene, BC3, C3N, and BC6N) towards the iodine-containing gases and, with the view of checking selectivity, towards common inhibiting gases in the containment atmosphere (H2O and CO), applying methods of dispersion-corrected density functional theory with periodic boundary conditions. A covalent bond is formed between the CO molecule and boron in BC3 or in 8-Pmmn borophene, compromising the anticipated applicability of these materials for iodine detection. The presence of nitrogen atoms in BC6N-2 prevents the formation of a covalent bond with CO; however, the closeness of adsorption energies for all the four gases studied does not distinguish this material as specifically sensitive to iodine species. Finally, the energies of adsorption on C3N yield a significant and promising discrimination between the adsorption energies of (I2, CH3I) vs. (CO, H2O), revealing possibilities for this material's use as an iodine sensor. The conclusions are supported by simulations at finite temperature; underlying electronic structures are also discussed.
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Affiliation(s)
- Kazem Zhour
- LCPT, Université de Lorraine, F-54000 Nancy, France.
| | - Ayoub Daouli
- LS2ME, Sultan Moulay Slimane University of Beni Mellal, FP-Khouribga, Morocco
| | | | - Abdellatif Hasnaoui
- LS2ME, Sultan Moulay Slimane University of Beni Mellal, FP-Khouribga, Morocco
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3
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Datar A, Wright C, Matthews DA. Theoretical Investigation of the X-ray Stark Effect in Small Molecules. J Phys Chem A 2023; 127:1576-1587. [PMID: 36787229 DOI: 10.1021/acs.jpca.2c08311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
We have studied the Stark effect in the soft x-ray region for various small molecules by calculating the field-dependent x-ray absorption spectra. This effect is explained in terms of the response of molecular orbitals (core and valence), the molecular dipole moment, and the molecular geometry to the applied electric field. A number of consistent trends are observed linking the computed shifts in absorption energies and intensities with specific features of the molecular electronic structure. We find that both the virtual molecular orbitals (valence and/or Rydberg) as well as the core orbitals contribute to observed trends in a complementary fashion. This initial study highlights the potential impact of x-ray Stark spectroscopy as a tool to study electronic structure and environmental perturbations at a submolecular scale.
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Affiliation(s)
- Avdhoot Datar
- Department of Chemistry, Southern Methodist University, Dallas, Texas 75275, United States
| | - Catherine Wright
- Department of Chemistry, Southern Methodist University, Dallas, Texas 75275, United States
| | - Devin A Matthews
- Department of Chemistry, Southern Methodist University, Dallas, Texas 75275, United States
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4
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Fischer EW, Saalfrank P. Cavity-induced non-adiabatic dynamics and spectroscopy of molecular rovibrational polaritons studied by multi-mode quantum models. J Chem Phys 2022; 157:034305. [DOI: 10.1063/5.0098006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We study theoretically the quantum dynamics and spectroscopy of rovibrational polaritons formed in a model system composed of a single rovibrating diatomic molecule, which interacts with two degenerate, orthogonally polarized modes of an optical Fabry–Pérot cavity. We employ an effective rovibrational Pauli–Fierz Hamiltonian in length gauge representation and identify three-state vibro-polaritonic conical intersections (VPCIs) between singly excited vibro-polaritonic states in a two-dimensional angular coordinate branching space. The lower and upper vibrational polaritons are of mixed light–matter hybrid character, whereas the intermediate state is purely photonic in nature. The VPCIs provide effective population transfer channels between singly excited vibrational polaritons, which manifest in rich interference patterns in rotational densities. Spectroscopically, three bright singly excited states are identified when an external infrared laser field couples to both a molecular and a cavity mode. The non-trivial VPCI topology manifests as pronounced multi-peak progression in the spectral region of the upper vibrational polariton, which is traced back to the emergence of rovibro-polaritonic light–matter hybrid states. Experimentally, ubiquitous spontaneous emission from cavity modes induces a dissipative reduction of intensity and peak broadening, which mainly influences the purely photonic intermediate state peak as well as the rovibro-polaritonic progression.
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Affiliation(s)
- Eric W. Fischer
- Theoretische Chemie, Institut für Chemie, Universität Potsdam, Karl-Liebknecht-Straße 24-25, D-14476 Potsdam-Golm, Germany
| | - Peter Saalfrank
- Theoretische Chemie, Institut für Chemie, Universität Potsdam, Karl-Liebknecht-Straße 24-25, D-14476 Potsdam-Golm, Germany
- Institut für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Straße 24-25, D-14476 Potsdam-Golm, Germany
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5
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Abstract
A few months before the COVID-19 pandemic, Pierre Vogel and Kendall N. Houk published with a new textbook Wiley-VCH, “Organic Chemistry: Theory, Reactivity, and Mechanisms in Modern Synthesis”, with a foreword from the late Roberts H. Grubbs. The book demonstrates how catalytic processes dominate all fields of modern organic chemistry and synthesis, and how invention combines thermodynamics, kinetics, spectroscopy, quantum mechanics, and thermochemical data libraries. Here, the authors present a few case studies that should be of interest to teachers, practitioners of organic and organometallic chemistry, and the engineers of molecules. The Vogel–Houk book is both textbook and reference manual; it provides a modern way to think about chemical reactivity and a powerful toolbox to inventors of new reactions and new procedures.
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6
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Shee J, Loipersberger M, Rettig A, Lee J, Head-Gordon M. Regularized Second-Order Møller-Plesset Theory: A More Accurate Alternative to Conventional MP2 for Noncovalent Interactions and Transition Metal Thermochemistry for the Same Computational Cost. J Phys Chem Lett 2021; 12:12084-12097. [PMID: 34910484 PMCID: PMC10037552 DOI: 10.1021/acs.jpclett.1c03468] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Second-order Møller-Plesset theory (MP2) notoriously breaks down for π-driven dispersion interactions and dative bonds in transition metal complexes. Herein, we investigate three physically justified forms of single-parameter, energy-gap dependent regularization which can yield high and transferable accuracy for a variety of noncovalent interactions (including S22, S66, and L7 test sets) and (mostly closed shell) transition metal thermochemistry. Regularization serves to damp overestimated pairwise additive contributions, renormalizing first-order amplitudes such that the effects of higher-order correlations are incorporated. The optimal parameter values for the noncovalent and transition metal sets are 1.1, 0.7, and 0.4 for κ, σ, and σ2 regularizers, respectively. However, such regularization slightly degrades the accuracy of conventional MP2 for some small-molecule test sets, most of which have relatively large average frontier energy gaps. Our results suggest that appropriately regularized MP2 models may improve double hybrid density functionals, at no additional cost over conventional MP2.
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Affiliation(s)
- James Shee
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Matthias Loipersberger
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Adam Rettig
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Joonho Lee
- Department of Chemistry, Columbia University, New York, New York 10027, United States
| | - Martin Head-Gordon
- Department of Chemistry, University of California, Berkeley, California 94720, United States
- Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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7
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Jin Y, Su NQ, Chen Z, Yang W. Introductory lecture: when the density of the noninteracting reference system is not the density of the physical system in density functional theory. Faraday Discuss 2020; 224:9-26. [PMID: 33084699 PMCID: PMC7746600 DOI: 10.1039/d0fd00102c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A major challenge in density functional theory (DFT) is the development of density functional approximations (DFAs) to overcome errors in existing DFAs, leading to more complex functionals. For such functionals, we consider roles of the noninteracting reference systems. The electron density of the Kohn-Sham (KS) reference with a local potential has been traditionally defined as being equal to the electron density of the physical system. This key idea has been applied in two ways: the inverse calculation of such a local KS potential for the reference from a given density and the direct calculation of density and energy based on given DFAs. By construction, the inverse calculation can yield a KS reference with the density equal to the input density of the physical system. In application of DFT, however, it is the direct calculation of density and energy from a DFA that plays a central role. For direct calculations, we find that the self-consistent density of the KS reference defined by the optimized effective potential (OEP), is not the density of the physical system, when the DFA is dependent on the external potential. This inequality holds also for the density of generalized KS (GKS) or generalized OEP reference, which allows a nonlocal potential, when the DFA is dependent on the external potential. Instead, the density of the physical system, consistent with a given DFA, is given by the linear response of the total energy with respect to the variation of the external potential. This is a paradigm shift in DFT on the use of noninteracting references: the noninteracting KS or GKS references represent the explicit computational variables for energy minimization, but not the density of the physical system for external potential-dependent DFAs. We develop the expressions for the electron density so defined through the linear response for general DFAs, demonstrate the results for orbital functionals and for many-body perturbation theory within the second-order and the random-phase approximation, and explore the connections to developments in DFT.
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Affiliation(s)
- Ye Jin
- Department of Chemistry, Duke University, Durham, NC 27708, USA.
| | - Neil Qiang Su
- Department of Chemistry, Duke University, Durham, NC 27708, USA.
| | - Zehua Chen
- Department of Chemistry, Duke University, Durham, NC 27708, USA.
| | - Weitao Yang
- Department of Chemistry, Duke University, Durham, NC 27708, USA. and Department of Physics, Duke University, Durham, NC 27708, USA
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8
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Limon P, Miralrio A, Gomez-Balderas R, Castro M. Carbon Monoxide Activation on Small Iron Magnetic Cluster Surfaces, Fe nCO, n = 1-20. A Theoretical Approach. J Phys Chem A 2020; 124:9951-9962. [PMID: 33207867 DOI: 10.1021/acs.jpca.0c07042] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The chemical activation of the carbon monoxide (CO) molecule on the surface of iron clusters Fen (n = 1-20) is studied in this work. By means of density functional theory (DFT) all-electron calculations, we have found that the adsorption of CO over the bare magnetic Fen (n = 1-20) clusters is thermochemically favorable. The Fen-CO interaction increases the C-O bond length, from 1.128 ± 0.014 Å, for isolated CO, up to 1.251 Å, for Fe9CO. Also, the calculated wavenumbers associated with the stretching modes νCO are decreased, or red-shifted, as another indicator of the CO bond weakening, passing from 2099 ± 4 to 1438 cm-1. Markedly, wavenumbers of vibrational modes νCO agree admirably well in comparison with experimental results reported for FenCO (n = 1, 18-20), getting small errors below 2.6%. The C-O bond is enlarged on the FenCO (n = 1-20) composed systems, as the CO molecule increases its bonding, charge transference, and coordination with the iron cluster. Therefore, small bare iron particles Fen (n = 1-20) can be proposed to promote the CO dissociation, especially Fe9CO, which has been proven to obtain the most prominent activation of the strong C-O bond by means of the charge transference from the metal core.
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Affiliation(s)
- Patricio Limon
- Laboratorio de Fisicoquímica Analítica, Unidad de Investigación Multidisciplinaria, Facultad de Estudios Superiores Cuautitlán, Universidad Nacional Autónoma de México, Cuautitlán Izcalli, C.P. 54700, Estado de México, México
| | - Alan Miralrio
- Tecnologico de Monterrey, Escuela de Ingeniería y Ciencias, Ave. Eugenio Garza Sada 2501, Monterrey 64849, NL, México
| | - Rodolfo Gomez-Balderas
- Laboratorio de Fisicoquímica Analítica, Unidad de Investigación Multidisciplinaria, Facultad de Estudios Superiores Cuautitlán, Universidad Nacional Autónoma de México, Cuautitlán Izcalli, C.P. 54700, Estado de México, México
| | - Miguel Castro
- Departamento de Física y Química Teórica, Facultad de Química, Universidad Nacional Autónoma de México, Ciudad de México 04510, México
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9
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Chrayteh A, Blondel A, Loos PF, Jacquemin D. Mountaineering Strategy to Excited States: Highly Accurate Oscillator Strengths and Dipole Moments of Small Molecules. J Chem Theory Comput 2020; 17:416-438. [DOI: 10.1021/acs.jctc.0c01111] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Amara Chrayteh
- Université de Nantes, CNRS, CEISAM UMR 6230, F-44000 Nantes, France
| | - Aymeric Blondel
- Université de Nantes, CNRS, CEISAM UMR 6230, F-44000 Nantes, France
| | - Pierre-François Loos
- Laboratoire de Chimie et Physique Quantiques, Université de Toulouse, CNRS, UPS, 31062 Toulouse, France
| | - Denis Jacquemin
- Université de Nantes, CNRS, CEISAM UMR 6230, F-44000 Nantes, France
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10
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A new paradigm for gaseous ligand selectivity of hemoproteins highlighted by soluble guanylate cyclase. J Inorg Biochem 2020; 214:111267. [PMID: 33099233 DOI: 10.1016/j.jinorgbio.2020.111267] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Revised: 09/23/2020] [Accepted: 09/27/2020] [Indexed: 02/06/2023]
Abstract
Nitric oxide (NO), carbon monoxide (CO), and oxygen (O2) are important physiological messengers whose concentrations vary in a remarkable range, [NO] typically from nM to several μM while [O2] reaching to hundreds of μM. One of the machineries evolved in living organisms for gas sensing is sensor hemoproteins whose conformational change upon gas binding triggers downstream response cascades. The recently proposed "sliding scale rule" hypothesis provides a general interpretation for gaseous ligand selectivity of hemoproteins, identifying five factors that govern gaseous ligand selectivity. Hemoproteins have intrinsic selectivity for the three gases due to a neutral proximal histidine ligand while proximal strain of heme and distal steric hindrance indiscriminately adjust the affinity of these three gases for heme. On the other hand, multiple-step NO binding and distal hydrogen bond donor(s) specifically enhance affinity for NO and O2, respectively. The "sliding scale rule" hypothesis provides clear interpretation for dramatic selectivity for NO over O2 in soluble guanylate cyclase (sGC) which is an important example of sensor hemoproteins and plays vital roles in a wide range of physiological functions. The "sliding scale rule" hypothesis has so far been validated by all experimental data and it may guide future designs for heme-based gas sensors.
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11
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Zou J, Osterwalder A. Investigation of the low-energy stereodynamics in the Ne( 3P 2) + N 2, CO reactions. J Chem Phys 2020; 153:104306. [PMID: 32933296 DOI: 10.1063/5.0022053] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
We report on an experimental investigation of the low-energy stereodynamics of the energy transfer reactions Ne(3P2) + X, producing Ne(1S) + X+ and [Ne-X]+ (X = N2 or CO). Collision energies in the range 0.2 K-700 K are obtained by using the merged beam technique. Two kinds of product ions are generated by Penning and associative ionization, respectively. The intermediate product [Ne-X]+ in vibrationally excited states can predissociate into bare ions (X+). The experimental ratio of the NeX+ and X+ product ion yields is similar for both molecules at high collision energies but diverge at collision energies below 100 K. This difference is explained by the first excited electronic state of the product ions, which is accessible in the case of CO but lies too high in energy in the case of N2.
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Affiliation(s)
- Junwen Zou
- Institute for Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Andreas Osterwalder
- Institute for Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
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12
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Jalili S, Keshavarz M. Zirconia (1 1 0) surface adsorption behavior – A density functional theory study. COMPUT THEOR CHEM 2020. [DOI: 10.1016/j.comptc.2020.112702] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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13
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Rossomme E, Lininger CN, Bell AT, Head-Gordon T, Head-Gordon M. Electronic structure calculations permit identification of the driving forces behind frequency shifts in transition metal monocarbonyls. Phys Chem Chem Phys 2020; 22:781-798. [DOI: 10.1039/c9cp04643g] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Our direct DFT decomposition of CO frequency shifts updates the paradigm for metal carbonyl binding.
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Affiliation(s)
- Elliot Rossomme
- Kenneth S. Pitzer Center for Theoretical Chemistry
- Department of Chemistry
- University of California
- Berkeley
- USA
| | - Christianna N. Lininger
- Chemical Sciences Division
- Lawrence Berkeley National Laboratory
- Berkeley
- USA
- Department of Chemical and Biomolecular Engineering
| | - Alexis T. Bell
- Chemical Sciences Division
- Lawrence Berkeley National Laboratory
- Berkeley
- USA
- Department of Chemical and Biomolecular Engineering
| | - Teresa Head-Gordon
- Kenneth S. Pitzer Center for Theoretical Chemistry
- Department of Chemistry
- University of California
- Berkeley
- USA
| | - Martin Head-Gordon
- Kenneth S. Pitzer Center for Theoretical Chemistry
- Department of Chemistry
- University of California
- Berkeley
- USA
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14
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Cheung PK, Jim CY. Impacts of air conditioning on air quality in tiny homes in Hong Kong. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 684:434-444. [PMID: 31154216 DOI: 10.1016/j.scitotenv.2019.05.354] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2019] [Revised: 05/12/2019] [Accepted: 05/23/2019] [Indexed: 06/09/2023]
Abstract
The risk of developing sick building syndrome is known to be higher in air-conditioned than naturally ventilated spaces. In Hong Kong, air conditioning (AC) is commonly used in homes to relieve summer heat stress. This study aims to assess the air quality impacts of AC in tiny homes called SDUs (sub-divided units). Poor ventilation and stronger heat stress in such informal housing could necessitate the use of AC. Predicted mean vote (PMV), CO, CO2, PM10, PM2.5 and VOCs were continuously monitored for 72 h in eight SDUs. PMV was ≥2 ('warm') in 75% of the SDUs at sleeping time (after 22:00), implying an 80% dissatisfaction among the occupants. During AC use, the mean concentrations of CO and CO2 increased from 220 to 905 μg/m3 (+312%) and from 920 to 1711 mg/m3 (+86%) respectively. The highest CO2 level (3758 mg/m3) was observed in a 3-person household (one more than other SDUs). The overall impacts on PM10 (+4%) and PM2.5 (+19%) were relatively insignificant. Reduced ventilation in air-conditioned homes facilitated the accumulation of VOCs (mean change: +22%). The findings could inform building design and modify AC usage practice to improve the indoor environment.
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Affiliation(s)
- Pui Kwan Cheung
- Department of Geography, University of Hong Kong, Pokfulam Road, Hong Kong, China.
| | - C Y Jim
- Department of Social Sciences, Education University of Hong Kong, Lo Ping Road, Tai Po, Hong Kong, China.
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15
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Ovcharov ML, Granchak VM. Photocatalytic Activation of Carbon Monoxide on Semiconductors and Derived Nanocomposites: Basic Principles and Mechanisms: A Review. THEOR EXP CHEM+ 2019. [DOI: 10.1007/s11237-019-09608-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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16
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Kim MW, An S, Seok H, Yoon SS, Yarin AL. Electrostatic Transparent Air Filter Membranes Composed of Metallized Microfibers for Particulate Removal. ACS APPLIED MATERIALS & INTERFACES 2019; 11:26323-26332. [PMID: 31259518 DOI: 10.1021/acsami.9b05686] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Particulate matter (PM) from ever-increasing industrialization poses a great public health risk. Although fiber-based filters are used effectively to block PM, filters with high packing densities suffer from excessive pressure drops. Electret filters bypass intermediate- or large-sized particles and thus capture only small particles, the motion of which can be influenced by weak electrostatic fields. In this study, we demonstrate the fabrication of metallized fibers that produce intense electric fields, thereby enabling capture of PMs of a variety of sizes produced by burning incense. The filter consisting of these metallized fibers effectively removes moving particles from air. An electricity-driven filter is relatively thin and has a low packing density, making it light, portable, transparent, and inexpensive. The sizes of the pores between the metallized fibers are readily controlled by manipulating the electrospinning and electroplating times. Sufficiently large pores permit efficient airflow and thus increase permeability without risking an excessive pressure drop. The metallized fiber filter is washable and thus reusable. In this study, a PM removal rate of >97% was recorded using a filter designed under optimal conditions.
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Affiliation(s)
- Min-Woo Kim
- School of Mechanical Engineering , Korea University , Seoul 02841 , Republic of Korea
| | - Seongpil An
- Department of Mechanical and Industrial Engineering , University of Illinois at Chicago , 842 W. Taylor Street , Chicago , Illinois 60607-7022 , United States
| | - Hyunjun Seok
- School of Mechanical Engineering , Korea University , Seoul 02841 , Republic of Korea
| | - Sam S Yoon
- School of Mechanical Engineering , Korea University , Seoul 02841 , Republic of Korea
| | - Alexander L Yarin
- Department of Mechanical and Industrial Engineering , University of Illinois at Chicago , 842 W. Taylor Street , Chicago , Illinois 60607-7022 , United States
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17
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Nair AS, Banerjee P, Sarkar S, Bagchi B. Dynamics of linear molecules in water: Translation-rotation coupling in jump motion driven diffusion. J Chem Phys 2019; 151:034301. [PMID: 31325934 DOI: 10.1063/1.5100930] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We study by computer simulations, and by theory, the coupled rotational and translational dynamics of three important linear diatomic molecules, namely, carbon monoxide (CO), nitric oxide (NO), and cyanide ion (CN-) in water. Translational diffusion of these molecules is found to be strongly coupled to their own rotational dynamics which, in turn, are coupled to similar motions of the surrounding water. In particular, we find that coupled orientational jump motions play an important role in all three cases. While CO and NO show similar features, CN- exhibits certain differences. Our results agree well with the known experimental values of the diffusion coefficient. We examined the validity of hydrodynamic predictions and found them to be inadequate, particularly for rotational diffusion. A mode coupling theory approach is developed and applied to understand the complexity of translation-rotation coupling.
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Affiliation(s)
- Anjali S Nair
- Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012, India
| | - Puja Banerjee
- Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012, India
| | - Sarmistha Sarkar
- Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012, India
| | - Biman Bagchi
- Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560012, India
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18
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Zhao L, Pan S, Holzmann N, Schwerdtfeger P, Frenking G. Chemical Bonding and Bonding Models of Main-Group Compounds. Chem Rev 2019; 119:8781-8845. [DOI: 10.1021/acs.chemrev.8b00722] [Citation(s) in RCA: 166] [Impact Index Per Article: 33.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- Lili Zhao
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 211816, China
| | - Sudip Pan
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 211816, China
| | - Nicole Holzmann
- Scientific Computing Department, STFC Rutherford Appleton Laboratory, Harwell Oxford, Didcot OX11 0QX, United Kingdom
| | - Peter Schwerdtfeger
- The New Zealand Institute for Advanced Study, Massey University (Albany), 0632 Auckland, New Zealand
| | - Gernot Frenking
- Institute of Advanced Synthesis, School of Chemistry and Molecular Engineering, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing 211816, China
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse, D-35043 Marburg, Germany
- Donostia International Physics Center (DIPC), P.K. 1072, 20080 Donostia, Euskadi, Spain
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19
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Wilson SM, Tezel FH. CO 2 and CO adsorption equilibrium on ZSM-5 for different SiO 2/Al 2O 3 ratios. SEP SCI TECHNOL 2019. [DOI: 10.1080/01496395.2018.1518332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- Sean M.W. Wilson
- Department of Chemical and Biological Engineering, University of Ottawa, Ottawa, ON, Canada
| | - F. Handan Tezel
- Department of Chemical and Biological Engineering, University of Ottawa, Ottawa, ON, Canada
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20
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Zamirri L, Pantaleone S, Ugliengo P. Carbon monoxide adsorption at forsterite surfaces as models of interstellar dust grains: An unexpected bathochromic (red) shift of the CO stretching frequency. J Chem Phys 2019; 150:064702. [PMID: 30770002 DOI: 10.1063/1.5075632] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Carbon monoxide (CO) is one of the most abundant species in the interstellar medium (ISM). In the colder regions of the ISM, it can directly adsorb onto exposed Mg cations of forsterite (Fo, Mg2SiO4), one of the main constituents of the dust grains. Its energetic of adsorption can strongly influence the chemico-physical evolution of cold interstellar clouds; thus, a detailed description of this process is desirable. We recently simulated the CO adsorption on crystalline Fo surfaces by computer ab initio methods and, surprisingly, reported cases where the CO stretching frequency underwent a bathochromic (red) shift (i.e., it is lowered with respect to the CO gas phase frequency), usually not experimentally observed for CO adsorbed onto oxides with non-d cations, like the present case. Here, we elucidate in deep when and under which conditions this case may happen and concluded that this red shift may be related to peculiar surface sites occurring at the morphologically complex Fo surfaces. The reasons for the red shift are linked to both the quadrupolar nature of the CO molecule and the role of dispersion interactions with surfaces of complex morphology. The present work, albeit speculative, suggests that, at variance with CO adsorption on simple oxides like MgO, the CO spectrum may exhibit features at lower frequencies than the reference gas frequency when CO is adsorbed on complex oxides, even in the absence of transition metal ions.
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Affiliation(s)
- Lorenzo Zamirri
- Dipartimento di Chimica, Università degli Studi di Torino, Via P. Giuria 7, I-10125 Torino, Italy
| | - Stefano Pantaleone
- Departament de Química, Universitat Autònoma de Barcelona, E-08193 Bellaterra, Spain
| | - Piero Ugliengo
- Dipartimento di Chimica, Università degli Studi di Torino, Via P. Giuria 7, I-10125 Torino, Italy
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21
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Zhao L, Hermann M, Schwarz WHE, Frenking G. The Lewis electron-pair bonding model: modern energy decomposition analysis. Nat Rev Chem 2019. [DOI: 10.1038/s41570-018-0060-4] [Citation(s) in RCA: 134] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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22
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Gameel KM, Sharafeldin IM, Allam NK. First-principles descriptors of CO chemisorption on Ni and Cu surfaces. Phys Chem Chem Phys 2019; 21:11476-11487. [DOI: 10.1039/c9cp00881k] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A comprehensive analysis of low coverage CO adsorption on Ni and Cu low-index miller surfaces – (100), (110), and (111) – over all the possible adsorption sites is presented.
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Affiliation(s)
- Kareem M. Gameel
- Energy Materials Laboratory (EML)
- School of Sciences and Engineering
- The American University in Cairo
- New Cairo 11835
- Egypt
| | - Icell M. Sharafeldin
- Energy Materials Laboratory (EML)
- School of Sciences and Engineering
- The American University in Cairo
- New Cairo 11835
- Egypt
| | - Nageh K. Allam
- Energy Materials Laboratory (EML)
- School of Sciences and Engineering
- The American University in Cairo
- New Cairo 11835
- Egypt
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23
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Sosulin IS, Shiryaeva ES, Tyurin DA, Feldman VI. Matrix Isolation and Ab Initio Study on the CHF3···CO Complex. J Phys Chem A 2018; 122:4042-4047. [DOI: 10.1021/acs.jpca.8b01485] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ilya S. Sosulin
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
| | | | - Daniil A. Tyurin
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
| | - Vladimir I. Feldman
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russia
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24
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Limon P, Miralrio A, Castro M. Adsorption and dissociation of carbon monoxide on iron and iron-carbon clusters: Fe n + 2CO and Fe n C + 2CO, n = 4 and 7. A theoretical study. COMPUT THEOR CHEM 2018. [DOI: 10.1016/j.comptc.2018.02.018] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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25
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Tsankova G, Richter M, Stanwix PL, May EF, Span R. Accurate High-Pressure Measurements of Carbon Monoxide's Electrical Properties. Chemphyschem 2018; 19:784-792. [PMID: 29267986 DOI: 10.1002/cphc.201701085] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2017] [Revised: 12/20/2017] [Indexed: 11/06/2022]
Abstract
Accurate measurements of carbon monoxide's electrical properties were carried out at high pressure for the first time enabling stringent comparisons with theoretical values calculated ab initio. Dielectric permittivity measurements were conducted utilising a microwave re-entrant cavity resonator over the temperature range from (255 to 313) K and at pressures up to 8 MPa with a relative combined expanded uncertainty (k=2) less than or equal to 52 ppm. The new data enable carbon monoxide's molar polarizability to be correlated within 0.5 %, significantly improving upon existing literature data, which have a relative scatter of about 10 %. The measured molecular polarizability and electric dipole moment of carbon monoxide were determined to be 2.176×10-40 C2 m2 J-1 and 0.107 D. Literature values from ab initio calculations for these properties are within 0.28 % and 3.9 %, respectively, of the measured quantities. Moreover, our measurement of the electric dipole moment at finite temperature agrees within 2.2 % with the value derived from accurate spectroscopic measurements for the ground rovibrational state. The second dielectric virial coefficient of carbon monoxide was determined experimentally for the first time to be bϵ =(1.015±0.044) cm3 mol-1 , which compares reasonably with ab initio estimates.
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Affiliation(s)
- Gergana Tsankova
- Thermodynamics, Ruhr-Universität Bochum, Universitätsstr. 150, 44801, Bochum, Germany
| | - Markus Richter
- Thermodynamics, Ruhr-Universität Bochum, Universitätsstr. 150, 44801, Bochum, Germany.,Fluid Science and Resources Division, School of Mechanical and Chemical Engineering, The University of Western Australia, 35 Stirling Highway, Crawley, Western Australia, 6009, Australia
| | - Paul L Stanwix
- Fluid Science and Resources Division, School of Mechanical and Chemical Engineering, The University of Western Australia, 35 Stirling Highway, Crawley, Western Australia, 6009, Australia
| | - Eric F May
- Fluid Science and Resources Division, School of Mechanical and Chemical Engineering, The University of Western Australia, 35 Stirling Highway, Crawley, Western Australia, 6009, Australia
| | - Roland Span
- Thermodynamics, Ruhr-Universität Bochum, Universitätsstr. 150, 44801, Bochum, Germany
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26
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Oliveira de Sousa DW, Nascimento MAC. Quantum Interference Contribution to the Dipole Moment of Diatomic Molecules. J Phys Chem A 2018; 122:1406-1412. [PMID: 29338264 DOI: 10.1021/acs.jpca.7b11760] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The interference energy partitioning analysis method developed by our group and used to study the nature of the chemical bond was extended to partition the electric dipole moment in quasi-classical and interference contributions. Our results show that interference participates in charge displacement in polar molecules, providing, directly or indirectly, a relevant contribution for the total dipole moment. A linear correlation was found between the interference contribution of the dipole moment from the bond electron group, μINT(bond), and the difference of electronegativity of the atoms which form the bond, ΔXAB. This interesting result reinforces the fact that electronegativity is not a property of an atom alone, but rather a property of the atom in the molecule and that ΔXAB can only be associated with that part of the total charge displacement resulting from the formation of the chemical bond. The partitioning of the total dipole moment into quasi-classical and interference contributions provides new insights about the reasons for the failure of the ΔXAB criterion in predicting the correct orientation of the dipole moment in several molecules. The results of the present work also bring additional evidence for the previously proposed mechanism of formation of polar bonds.
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27
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Gameel KM, Sharafeldin IM, Abourayya AU, Biby AH, Allam NK. Unveiling CO adsorption on Cu surfaces: new insights from molecular orbital principles. Phys Chem Chem Phys 2018; 20:25892-25900. [DOI: 10.1039/c8cp04253e] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A holistic analysis of adsorption energies, charge transfer, and structural changes has been employed to highlight the variations in adsorption mechanisms upon changing the surface type and the adsorption site.
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Affiliation(s)
- Kareem M. Gameel
- Energy Materials Laboratory
- School of Sciences and Engineering
- The American University in Cairo
- New Cairo 11835
- Egypt
| | - Icell M. Sharafeldin
- Energy Materials Laboratory
- School of Sciences and Engineering
- The American University in Cairo
- New Cairo 11835
- Egypt
| | - Amr U. Abourayya
- Energy Materials Laboratory
- School of Sciences and Engineering
- The American University in Cairo
- New Cairo 11835
- Egypt
| | - Ahmed H. Biby
- Energy Materials Laboratory
- School of Sciences and Engineering
- The American University in Cairo
- New Cairo 11835
- Egypt
| | - Nageh K. Allam
- Energy Materials Laboratory
- School of Sciences and Engineering
- The American University in Cairo
- New Cairo 11835
- Egypt
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28
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Alvarez-Thon L, Mammino L. Information on Gas-Phase Diatomic Molecules from Magnetically Induced Current Densities. J Comput Chem 2017; 39:52-60. [DOI: 10.1002/jcc.25083] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2017] [Revised: 09/20/2017] [Accepted: 09/22/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Luis Alvarez-Thon
- Facultad de Ingeniería, Universidad Central de Chile; Toesca 1783 Santiago Chile
| | - Liliana Mammino
- Department of Chemistry; University of Venda, P/bag X5050; Thohoyandou 0950 South Africa
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29
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30
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Fantuzzi F, de Sousa DWO, Nascimento MAC. The Nature of the Chemical Bond from a Quantum Mechanical Interference Perspective. ChemistrySelect 2017. [DOI: 10.1002/slct.201601535] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Felipe Fantuzzi
- Departmento de Físico-Química, Instituto de Química; Universidade Federal do Rio de Janeiro; Avenida Athos da Silveira Ramos, 149, A-412
| | - David Wilian Oliveira de Sousa
- Departmento de Físico-Química, Instituto de Química; Universidade Federal do Rio de Janeiro; Avenida Athos da Silveira Ramos, 149, A-412
| | - Marco Antonio Chaer Nascimento
- Departmento de Físico-Química, Instituto de Química; Universidade Federal do Rio de Janeiro; Avenida Athos da Silveira Ramos, 149, A-412
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31
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Shariati S, Pakiari AH. Role of alkali metal additives on adsorption of CO on small copper clusters [CunAMm (m+n⩽7, m<n)]: A DFT study. COMPUT THEOR CHEM 2017. [DOI: 10.1016/j.comptc.2016.11.015] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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32
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Kim KC, Fairen-Jimenez D, Snurr RQ. Computational screening of functional groups for capture of toxic industrial chemicals in porous materials. Phys Chem Chem Phys 2017; 19:31766-31772. [DOI: 10.1039/c7cp06521c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Functional groups are screened computationally to understand how they bind and capture toxic industrial chemicals.
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Affiliation(s)
- Ki Chul Kim
- Department of Chemical and Biological Engineering
- Northwestern University
- Evanston
- USA
- Department of Chemical Engineering
| | - David Fairen-Jimenez
- Adsorption & Advanced Materials Laboratory (AAML)
- Department of Chemical Engineering and Biotechnology
- University of Cambridge
- Cambridge
- UK
| | - Randall Q. Snurr
- Department of Chemical and Biological Engineering
- Northwestern University
- Evanston
- USA
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33
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Pham T, Forrest KA, Franz DM, Space B. Experimental and theoretical investigations of the gas adsorption sites in rht-metal–organic frameworks. CrystEngComm 2017. [DOI: 10.1039/c7ce01032j] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This highlight article reviews the experimental and theoretical studies that have been implemented to investigate the sorption sites for gases in rht-metal–organic frameworks.
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Affiliation(s)
- Tony Pham
- Department of Chemistry
- University of South Florida
- 4202 East Fowler Avenue
- Tampa
- USA
| | - Katherine A. Forrest
- Department of Chemistry
- University of South Florida
- 4202 East Fowler Avenue
- Tampa
- USA
| | - Douglas M. Franz
- Department of Chemistry
- University of South Florida
- 4202 East Fowler Avenue
- Tampa
- USA
| | - Brian Space
- Department of Chemistry
- University of South Florida
- 4202 East Fowler Avenue
- Tampa
- USA
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34
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Chołuj M, Bartkowiak W. Ground-state dipole moment of the spatially confined carbon monoxide and boron fluoride molecules. Chem Phys Lett 2016. [DOI: 10.1016/j.cplett.2016.09.072] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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35
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Fantuzzi F, Nascimento MAC. Description of Polar Chemical Bonds from the Quantum Mechanical Interference Perspective. J Chem Theory Comput 2015; 10:2322-32. [PMID: 26580752 DOI: 10.1021/ct500334f] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The Generalized Product Function Energy Partitioning (GPF-EP) method has been applied to a set of molecules, AH (A = Li, Be, B, C, N, O, F), CO and LiF with quite different dipole moments, in order to investigate the role played by the quantum interference effect in the formation of polar chemical bonds. The calculations were carried out with GPF wave functions treating all the core electrons as a single Hartree-Fock group and the bonding electrons at the Generalized Valence Bond Perfect-Pairing (GVB-PP) level, with the cc-pVTZ basis set. The results of the energy partitioning into interference and quasi-classical contributions along the respective Potential Energy Surfaces (PES) show that the main contribution to the depth of the potential wells comes from the interference term, which is an indication that all the molecules mentioned above form typical covalent bonds. In all cases, the stabilization promoted by the interference term comes from the kinetic contribution, in agreement with previous results. The analysis of the effect of quantum interference on the electron density reveals that while polarization effects (quasi-classical) tend to displace electronic density from the most polarizable atom toward the less polarizable one, interference (quantum effects) counteracts by displacing electronic density to the bond region, giving rise to the right electronic density and dipole moment.
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Affiliation(s)
- Felipe Fantuzzi
- Instituto de Química, Universidade Federal do Rio de Janeiro , Rio de Janeiro, RJ 21941-909, Brazil
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36
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Yasaka Y, Kimura Y. Polarity and Nonpolarity of Ionic Liquids Viewed from the Rotational Dynamics of Carbon Monoxide. J Phys Chem B 2015; 119:15493-501. [DOI: 10.1021/acs.jpcb.5b09745] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Y. Yasaka
- Department of Molecular Chemistry
and Biochemistry, Faculty of Science and Engineering, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan
| | - Y. Kimura
- Department of Molecular Chemistry
and Biochemistry, Faculty of Science and Engineering, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan
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37
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Intriguing Electrostatic Potential of CO: Negative Bond-ends and Positive Bond-cylindrical-surface. Sci Rep 2015; 5:16307. [PMID: 26542890 PMCID: PMC4635358 DOI: 10.1038/srep16307] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Accepted: 10/12/2015] [Indexed: 12/13/2022] Open
Abstract
The strong electronegativity of O dictates that the ground state of singlet CO has positively charged C and negatively charged O, in agreement with ab initio charge analysis, but in disagreement with the dipole direction. Though this unusual phenomenon has been fairly studied, the study of electrostatic potential (EP) for noncovalent interactions of CO is essential for better understanding. Here we illustrate that both C and O atom-ends show negative EP (where the C end gives more negative EP), favoring positively charged species, whereas the cylindrical surface of the CO bond shows positive EP, favoring negatively charged ones. This is demonstrated from the interactions of CO with Na+, Cl–, H2O, CO and benzene. It can be explained by the quadrupole driven electrostatic nature of CO (like N2) with very weak dipole moment. The EP is properly described by the tripole model taking into account the electrostatic multipole moments, which has a large negative charge at a certain distance protruded from C, a large positive charge on C, and a small negative charge on O. We also discuss the EP of the first excited triplet CO.
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38
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Zeng T, Danovich D, Shaik S, Ananth N, Hoffmann R. Tuning the Ground State Symmetry of Acetylenyl Radicals. ACS CENTRAL SCIENCE 2015; 1:270-278. [PMID: 27162981 PMCID: PMC4827494 DOI: 10.1021/acscentsci.5b00187] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Indexed: 06/05/2023]
Abstract
The lowest excited state of the acetylenyl radical, HCC, is a (2)Π state, only 0.46 eV above the ground state, (2)Σ(+). The promotion of an electron from a π bond pair to a singly occupied σ hybrid orbital is all that is involved, and so we set out to tune those orbital energies, and with them the relative energetics of (2)Π and (2)Σ(+) states. A strategy of varying ligand electronegativity, employed in a previous study on substituted carbynes, RC, was useful, but proved more difficult to apply for substituted acetylenyl radicals, RCC. However, π-donor/acceptor substitution is effective in modifying the state energies. We are able to design molecules with (2)Π ground states (NaOCC, H2NCC ((2)A″), HCSi, FCSi, etc.) and vary the (2)Σ(+)-(2)Π energy gap over a 4 eV range. We find an inconsistency between bond order and bond dissociation energy measures of the bond strength in the Si-containing molecules; we provide an explanation through an analysis of the relevant potential energy curves.
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Affiliation(s)
- Tao Zeng
- Department
of Chemistry and Chemical Biology, Cornell
University, Ithaca, New York 14853, United
States
| | - David Danovich
- Institute
of Chemistry and The Lise Meitner-Minerva Center for Computational
Quantum Chemistry, Hebrew University of
Jerusalem, 91904 Jerusalem, Israel
| | - Sason Shaik
- Institute
of Chemistry and The Lise Meitner-Minerva Center for Computational
Quantum Chemistry, Hebrew University of
Jerusalem, 91904 Jerusalem, Israel
| | - Nandini Ananth
- Department
of Chemistry and Chemical Biology, Cornell
University, Ithaca, New York 14853, United
States
| | - Roald Hoffmann
- Department
of Chemistry and Chemical Biology, Cornell
University, Ithaca, New York 14853, United
States
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39
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Thomas RE, Opalka D, Overy C, Knowles PJ, Alavi A, Booth GH. Analytic nuclear forces and molecular properties from full configuration interaction quantum Monte Carlo. J Chem Phys 2015; 143:054108. [DOI: 10.1063/1.4927594] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Robert E. Thomas
- The University Chemical Laboratory, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Daniel Opalka
- The University Chemical Laboratory, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
- Max Planck Institute for Solid State Research, Heisenbergstraße 1, 70569 Stuttgart, Germany
| | - Catherine Overy
- The University Chemical Laboratory, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
| | - Peter J. Knowles
- School of Chemistry, Cardiff University, Cardiff CF10 3AT, United Kingdom
| | - Ali Alavi
- The University Chemical Laboratory, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
- Max Planck Institute for Solid State Research, Heisenbergstraße 1, 70569 Stuttgart, Germany
| | - George H. Booth
- The University Chemical Laboratory, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, United Kingdom
- Department of Physics, King’s College London, Strand, London WC2R 2LS, United Kingdom
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40
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Fantuzzi F, Cardozo TM, Nascimento MAC. Nature of the chemical bond and origin of the inverted dipole moment in boron fluoride: a generalized valence bond approach. J Phys Chem A 2015; 119:5335-43. [PMID: 25531385 DOI: 10.1021/jp510085r] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The generalized product function energy partitioning (GPF-EP) method has been applied to investigate the nature of the chemical bond and the origin of the inverted dipole moment of the BF molecule. The calculations were carried out with GPF wave functions treating all of the core electrons as a single Hartree-Fock group and the valence electrons at the generalized valence bond perfect-pairing (GVB-PP) or full GVB levels, with the cc-pVTZ basis set. The results show that the chemical structure of both X (1)Σ(+) and a (3)Π states is composed of a single bond. The lower dissociation energy of the excited state is attributed to a stabilizing intraatomic singlet coupling involving the B 2sp-like lobe orbitals after bond dissociation. An increase of electron density on the B atom caused by the reorientation of the boron 2sp-like lobe orbitals is identified as the main responsible effect for the electric dipole inversion in the ground state of BF. Finally, it is shown that π back-bonding from fluorine to boron plays a minor role in the electron density displacement to the bonding region in both states. Moreover, this effect is associated with changes in the quasi-classical component of the electron density only and does not contribute to covalency in either of the states. Therefore, at least for the case of the BF molecule, the term back-bonding is misleading, since it does not contribute to the bond formation.
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Affiliation(s)
- Felipe Fantuzzi
- Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro RJ 21941-909, Brazil
| | - Thiago Messias Cardozo
- Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro RJ 21941-909, Brazil
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41
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Alves TV, Ornellas FR. Exploring the electronic states of iodocarbyne: a theoretical contribution. Phys Chem Chem Phys 2014; 16:9530-7. [DOI: 10.1039/c4cp00375f] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
By contrasting for the first time the non-relativistic and relativistic characterization of the electronic states of iodocarbyne, we provide a very reliable description of this species that we expect can motivate and guide the spectroscopist in its experimental investigation.
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Affiliation(s)
- Tiago Vinicius Alves
- Departamento de Química Fundamental
- Instituto de Química
- Universidade de São Paulo
- Av. Prof. Lineu Prestes
- São Paulo, Brazil
| | - Fernando R. Ornellas
- Departamento de Química Fundamental
- Instituto de Química
- Universidade de São Paulo
- Av. Prof. Lineu Prestes
- São Paulo, Brazil
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42
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Kinetics of CO recombination to the heme in Geobacillus stearothermophilus nitric oxide synthase. Polyhedron 2013; 58:134-138. [DOI: 10.1016/j.poly.2012.08.079] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Coe JP, Taylor DJ, Paterson MJ. Monte Carlo configuration interaction applied to multipole moments, ionization energies, and electron affinities. J Comput Chem 2013; 34:1083-93. [DOI: 10.1002/jcc.23211] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2012] [Revised: 11/23/2012] [Accepted: 12/01/2012] [Indexed: 11/07/2022]
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Skelton AA, Fried JR. The insertion of gas molecules into polyhedral oligomeric silsesquioxane (POSS) cages: understanding the energy of insertion using quantum chemical calculations. Phys Chem Chem Phys 2013; 15:4341-54. [DOI: 10.1039/c3cp43738h] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Liu X, Li Q, Cheng J, Li W. Influence of cooperativity on the frequency shift of the Ar–H stretch vibration in HArF complexes. Mol Phys 2012. [DOI: 10.1080/00268976.2012.728639] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Ayouz M, Mikhailov I, Babikov D, Raoult M, Galtier S, Dulieu O, Kokoouline V. Potential energy and dipole moment surfaces of HCO- for the search of H- in the interstellar medium. J Chem Phys 2012; 136:224310. [PMID: 22713050 DOI: 10.1063/1.4724096] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Potential energy and permanent dipole moment surfaces of the electronic ground state of formyl negative ion HCO(-) are determined for a large number of geometries using the coupled-cluster theory with single and double and perturbative treatment of triple excitations ab initio method with a large basis set. The obtained data are used to construct interpolated surfaces, which are extended analytically to the region of large separations between CO and H(-) with the multipole expansion approach. We have calculated the energy of the lowest rovibrational levels of HCO(-) that should guide the spectroscopic characterization of HCO(-) in laboratory experiments. The study can also help to detect HCO(-) in the cold and dense regions of the interstellar medium where the anion could be formed through the association of abundant CO with still unobserved H(-).
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Affiliation(s)
- M Ayouz
- Department of Chemistry, Marquette University, P.O. Box 1881, Milwaukee, Wisconsin 53201, USA
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Theis D, Khait YG, Hoffmann MR. GVVPT2 energy gradient using a Lagrangian formulation. J Chem Phys 2011; 135:044117. [DOI: 10.1063/1.3611049] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
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Khait YG, Theis D, Hoffmann MR. Lagrangian approach for geometrical derivatives and nonadiabatic coupling terms in MRCISD. Mol Phys 2010. [DOI: 10.1080/00268976.2010.521777] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Yuriy G. Khait
- a Department of Chemistry , University of North Dakota , Grand Forks , ND 58202-9024 , USA
| | - Daniel Theis
- a Department of Chemistry , University of North Dakota , Grand Forks , ND 58202-9024 , USA
| | - Mark R. Hoffmann
- a Department of Chemistry , University of North Dakota , Grand Forks , ND 58202-9024 , USA
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George D.X. F, Kumar S. Ab initio ground and the first excited adiabatic and quasidiabatic potential energy surfaces of H++CO system. Chem Phys 2010. [DOI: 10.1016/j.chemphys.2010.05.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Theis D, Khait YG, Pal S, Hoffmann MR. Molecular electric dipole moments using the GVVPT2 variant of multireference perturbation theory. Chem Phys Lett 2010. [DOI: 10.1016/j.cplett.2010.01.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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