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Duprat F, Ploix JL, Aubry JM, Gaudin T. Fast and Accurate Prediction of Refractive Index of Organic Liquids with Graph Machines. Molecules 2023; 28:6805. [PMID: 37836648 PMCID: PMC10574377 DOI: 10.3390/molecules28196805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 09/22/2023] [Accepted: 09/23/2023] [Indexed: 10/15/2023] Open
Abstract
The refractive index (RI) of liquids is a key physical property of molecular compounds and materials. In addition to its ubiquitous role in physics, it is also exploited to impart specific optical properties (transparency, opacity, and gloss) to materials and various end-use products. Since few methods exist to accurately estimate this property, we have designed a graph machine model (GMM) capable of predicting the RI of liquid organic compounds containing up to 16 different types of atoms and effective in discriminating between stereoisomers. Using 8267 carefully checked RI values from the literature and the corresponding 2D organic structures, the GMM provides a training root mean square relative error of less than 0.5%, i.e., an RMSE of 0.004 for the estimation of the refractive index of the 8267 compounds. The GMM predictive ability is also compared to that obtained by several fragment-based approaches. Finally, a Docker-based tool is proposed to predict the RI of organic compounds solely from their SMILES code. The GMM developed is easy to apply, as shown by the video tutorials provided on YouTube.
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Affiliation(s)
- François Duprat
- Molecular, Macromolecular Chemistry and Materials, ESPCI Paris, PSL Research University, 75005 Paris, France;
| | - Jean-Luc Ploix
- Molecular, Macromolecular Chemistry and Materials, ESPCI Paris, PSL Research University, 75005 Paris, France;
| | - Jean-Marie Aubry
- Unité de Catalyse et Chimie du Solide, Centrale Lille, University Lille, UMR CNRS 8181, 59000 Lille, France;
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2
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Novaes FJM, de Faria DC, Ferraz FZ, de Aquino Neto FR. Hansen Solubility Parameters Applied to the Extraction of Phytochemicals. PLANTS (BASEL, SWITZERLAND) 2023; 12:3008. [PMID: 37631219 PMCID: PMC10459436 DOI: 10.3390/plants12163008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Revised: 08/01/2023] [Accepted: 08/07/2023] [Indexed: 08/27/2023]
Abstract
In many analytical chemical procedures, organic solvents are required to favour a better global yield upon the separation, extraction, or isolation of the target phytochemical analyte. The selection of extraction solvents is generally based on the solubility difference between target analytes and the undesired matrix components, as well as the overall extraction procedure cost and safety. Hansen Solubility Parameters are typically used for this purpose. They are based on the product of three coordinated forces (hydrogen bonds, dispersion, and dipolar forces) calculated for any substance to predict the miscibility of a compound in a pure solvent, in a mixture of solvents, or in non-solvent compounds, saving time and costs on method development based on a scientific understanding of chemical composition and intermolecular interactions. This review summarises how Hansen Solubility Parameters have been incorporated into the classical and emerging (or greener) extraction techniques of phytochemicals as an alternative to trial-and-error approaches, avoiding impractical experimental conditions and resulting in, for example, saving resources and avoiding unnecessary solvent wasting.
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Affiliation(s)
- Fábio Junior Moreira Novaes
- Departamento de Química, Universidade Federal de Viçosa, Avenida Peter Henry Rolfs, s/n, Campus Universitário, Viçosa 36570-900, MG, Brazil; (F.J.M.N.); (D.C.d.F.); (F.Z.F.)
| | - Daliane Cláudia de Faria
- Departamento de Química, Universidade Federal de Viçosa, Avenida Peter Henry Rolfs, s/n, Campus Universitário, Viçosa 36570-900, MG, Brazil; (F.J.M.N.); (D.C.d.F.); (F.Z.F.)
| | - Fabio Zamboni Ferraz
- Departamento de Química, Universidade Federal de Viçosa, Avenida Peter Henry Rolfs, s/n, Campus Universitário, Viçosa 36570-900, MG, Brazil; (F.J.M.N.); (D.C.d.F.); (F.Z.F.)
| | - Francisco Radler de Aquino Neto
- Laboratório de Apoio ao Desenvolvimento Tecnológico (LADETEC/IQ-UFRJ), Instituto de Química, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-598, RJ, Brazil
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3
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Bikku T, Fritz RA, Colón YJ, Herrera F. Machine Learning Identification of Organic Compounds Using Visible Light. J Phys Chem A 2023; 127:2407-2414. [PMID: 36876889 DOI: 10.1021/acs.jpca.2c07955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
Abstract
Identifying chemical compounds is essential in several areas of science and engineering. Laser-based techniques are promising for autonomous compound detection because the optical response of materials encodes enough electronic and vibrational information for remote chemical identification. This has been exploited using the fingerprint region of infrared absorption spectra, which involves a dense set of absorption peaks that are unique to individual molecules, thus facilitating chemical identification. However, optical identification using visible light has not been realized. Using decades of experimental refractive index data in the scientific literature of pure organic compounds and polymers over a broad range of frequencies from the ultraviolet to the far-infrared, we develop a machine learning classifier that can accurately identify organic species based on a single-wavelength dispersive measurement in the visible spectral region, away from absorption resonances. The optical classifier proposed here could be applied to autonomous material identification protocols and applications.
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Affiliation(s)
- Thulasi Bikku
- Department of Physics, Universidad de Santiago de Chile, Av. Victor Jara 3493, Santiago, Chile.,Computer Science and Engineering, Vignan's Nirula Institute of Technology and Science for Women, Guntur, Andhra Pradesh 522009, India
| | - Rubén A Fritz
- Department of Physics, Universidad de Santiago de Chile, Av. Victor Jara 3493, Santiago, Chile
| | - Yamil J Colón
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Felipe Herrera
- Department of Physics, Universidad de Santiago de Chile, Av. Victor Jara 3493, Santiago, Chile.,Millennium Institute for Research in Optics, Esteban Iturra s/n 4070386, Concepción , Chile
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Gorkowski K, Benedict KB, Carrico CM, Dubey MK. Complexities in Modeling Organic Aerosol Light Absorption. J Phys Chem A 2022; 126:4827-4833. [PMID: 35834798 PMCID: PMC9340763 DOI: 10.1021/acs.jpca.2c02236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 07/04/2022] [Indexed: 11/29/2022]
Abstract
Aerosol particles dynamically evolve in the atmosphere by physicochemical interactions with sunlight, trace chemical species, and water. Current modeling approaches fix properties such as aerosol refractive index, introducing spatial and temporal errors in the radiative impacts. Further progress requires a process-level description of the refractive indices as the particles age and experience physicochemical transformations. We present two multivariate modeling approaches of light absorption by brown carbon (BrC). The initial approach was to extend the modeling framework of the refractive index at 589 nm (nD), but that result was insufficient. We developed a second multivariate model using aromatic rings and functional groups to predict the imaginary part of the complex refractive index. This second model agreed better with measured spectral absorption peaks, showing promise for a simplified treatment of BrC optics. In addition to absorption, organic functionalities also alter the water affinity of the molecules, leading to a hygroscopic uptake and increased light absorption, which we show through measurements and modeling.
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Affiliation(s)
- Kyle Gorkowski
- Earth
and Environmental Science, Los Alamos National
Laboratory, Los Alamos, New Mexico 87545, United States
| | - Katherine B. Benedict
- Earth
and Environmental Science, Los Alamos National
Laboratory, Los Alamos, New Mexico 87545, United States
| | - Christian M. Carrico
- New
Mexico Institute of Mining and Technology, Socorro, New Mexico 87801, United States
| | - Manvendra K. Dubey
- Earth
and Environmental Science, Los Alamos National
Laboratory, Los Alamos, New Mexico 87545, United States
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5
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Terrell E. Estimation of Hansen solubility parameters with regularized regression for biomass conversion products: An application of adaptable group contribution. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2021.117184] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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6
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Lee SH, Seo JH, Shin E, Joo SH, Buyukcakir O, Jiang Y, Kim M, Nam H, Kwak SK, Ruoff RS. Structural analysis of hyperbranched polyhydrocarbon synthesized by electrochemical polymerization. Polym Chem 2022. [DOI: 10.1039/d2py00756h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Structure of a hyperbranched polyhydrocarbon obtained by electrochemical polymerization was analyzed by various NMR techniques and modeling. The calculated physical properties from its bulk model system well matched with experimental results.
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Affiliation(s)
- Sun Hwa Lee
- Center for Multidimentional Carbon Materials (CMCM), Institute for Basic Science (IBS), Ulsan 44919, Republic of Korea
| | - Jae Hong Seo
- Center for Multidimentional Carbon Materials (CMCM), Institute for Basic Science (IBS), Ulsan 44919, Republic of Korea
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Eunhye Shin
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Se Hun Joo
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Onur Buyukcakir
- Center for Multidimentional Carbon Materials (CMCM), Institute for Basic Science (IBS), Ulsan 44919, Republic of Korea
| | - Yi Jiang
- Center for Multidimentional Carbon Materials (CMCM), Institute for Basic Science (IBS), Ulsan 44919, Republic of Korea
| | - Minhyeok Kim
- Center for Multidimentional Carbon Materials (CMCM), Institute for Basic Science (IBS), Ulsan 44919, Republic of Korea
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Hyunju Nam
- Center for Multidimentional Carbon Materials (CMCM), Institute for Basic Science (IBS), Ulsan 44919, Republic of Korea
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Sang Kyu Kwak
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
| | - Rodney S. Ruoff
- Center for Multidimentional Carbon Materials (CMCM), Institute for Basic Science (IBS), Ulsan 44919, Republic of Korea
- Department of Chemistry, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
- Department of Materials Science and Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
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7
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Kim CG, Son MJ, Do JY. Cationic living polymerization of cyclic dithiocarbonates involving sulfide-migration. Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2021.110611] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Solel E, Ruth M, Schreiner PR. London Dispersion Helps Refine Steric A-Values: The Halogens. J Org Chem 2021; 86:7701-7713. [PMID: 33988377 DOI: 10.1021/acs.joc.1c00767] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Halogens are rarely considered as dispersion energy donors for organic reaction design. Here, we re-examine one of the textbook examples for assessing steric hindrance, the A-value, and demonstrate that even in this system, halogens cannot be treated solely as classic repulsive hard spheres. A significant part of the steric demand of the halogens is compensated by attractive London dispersion (LD) interactions, explaining the experimental lack of a clear trend when going down the halogens' row. Beyond monohalogenated cyclohexanes, dihalo- and perhalocyclohexanes also show significant LD interactions. We also explored several other small organic systems containing halogens. Our findings show that organic chemists should treat halogens as possible sources of LD interactions in reaction design, as these atoms can change the landscape of the potential energy surface and reverse trends of conformer stabilities and reaction selectivities.
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Affiliation(s)
- Ephrath Solel
- Institute of Organic Chemistry, Justus Liebig University, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
| | - Marcel Ruth
- Institute of Organic Chemistry, Justus Liebig University, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
| | - Peter R Schreiner
- Institute of Organic Chemistry, Justus Liebig University, Heinrich-Buff-Ring 17, 35392 Giessen, Germany
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9
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Erickson ME, Ngongang M, Rasulev B. A Refractive Index Study of a Diverse Set of Polymeric Materials by QSPR with Quantum-Chemical and Additive Descriptors. Molecules 2020; 25:molecules25173772. [PMID: 32825028 PMCID: PMC7503810 DOI: 10.3390/molecules25173772] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 08/10/2020] [Accepted: 08/14/2020] [Indexed: 11/23/2022] Open
Abstract
Predicting the activities and properties of materials via in silico methods has been shown to be a cost- and time-effective way of aiding chemists in synthesizing materials with desired properties. Refractive index (n) is one of the most important defining characteristics of an optical material. Presented in this work is a quantitative structure–property relationship (QSPR) model that was developed to predict the refractive index for a diverse set of polymers. A number of models were created, where a four-variable model showed the best predictive performance with R2 = 0.904 and Q2LOO = 0.897. The robustness and predictability of the best model was validated using the leave-one-out technique, external set and y-scrambling methods. The predictive ability of the model was confirmed with the external set, showing the R2ext = 0.880. For the refractive index, the ionization potential, polarizability, 2D and 3D geometrical descriptors were the most influential properties. The developed model was transparent and mechanistically explainable and can be used in the prediction of the refractive index for new and untested polymers.
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10
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Mathieu D. QSPR versus fragment-based methods to predict octanol-air partition coefficients: Revisiting a recent comparison of both approaches. CHEMOSPHERE 2020; 245:125584. [PMID: 31864054 DOI: 10.1016/j.chemosphere.2019.125584] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 12/04/2019] [Accepted: 12/07/2019] [Indexed: 06/10/2023]
Abstract
The octanol-air partition coefficient (KOA) is useful to assess the fate of organic chemicals in the environment. Very recently, an interesting comparison of current methods to predict this property (Chemosphere 148 (2016) 118-125) highlighted a newly introduced Quantitative Structure-Property Relationship (QSPR), as a group-contribution (GC) method and a quantum chemical solvation model were reported to yield significantly less accurate results. Based on the observation that the so-called GC method investigated in this earlier study was inconsistent with the temperature dependence of KOA, the previously recommended QSPR is presently compared to the geometrical fragment (GF) additivity scheme. In addition to providing some improvement in terms of accuracy, this fragment-based procedure exhibits many advantages in terms of simplicity, interpretability, applicability and availability.
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11
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Bain A, Preston TC. The wavelength-dependent optical properties of weakly absorbing aqueous aerosol particles. Chem Commun (Camb) 2020; 56:8928-8931. [DOI: 10.1039/d0cc02737e] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A model for calculating the wavelength-dependent refractive index of multicomponent mixtures is presented and applied to aqueous systems in the atmosphere and oceans.
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Affiliation(s)
- Alison Bain
- Department of Atmospheric and Oceanic Sciences and Department of Chemistry
- McGill University
- Montreal
- Canada
| | - Thomas C. Preston
- Department of Atmospheric and Oceanic Sciences and Department of Chemistry
- McGill University
- Montreal
- Canada
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12
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Balchandani S, Mandal B, Dharaskar S, Kumar A, Bandyopadhyay S. Thermally induced characterization and modeling of physicochemical, acoustic, rheological, and thermodynamic properties of novel blends of (HEF + AEP) and (HEF + AMP) for CO 2/H 2S absorption. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:32209-32223. [PMID: 31494857 DOI: 10.1007/s11356-019-06305-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Accepted: 08/26/2019] [Indexed: 05/26/2023]
Abstract
CO2 and H2S removal from flue gases is indispensable to be done for protection of environment with respect to global warming as well as clean air. Chemical absorption is one of the most developed and capable techniques for the removal of these sour gases. Among the many solvents, ionic liquids (ILs) are more capable due to their desirable green solvent properties. However, ILs being usually costlier, the blends of ILs and amines are more suggestive for absorption. In the present work, various essential characterization properties such as density, viscosity, sound velocity, and refractive index of two ionic liquid-amine blend systems viz. (1) 2-Hydroxy ethyl ammonium formate (HEF) + 1-(2-aminoethyl) piperazine (AEP) and (2) 2-Hydroxy ethyl ammonium formate (HEF) + 2-Amino-2-methyl-1-propanol (AMP) are reported. The temperature range for which all the measurements were conducted is 298.15 to 333.15 K. For both systems of (HEF + AEP) and (HEF + AMP), HEF mass fractions were varied from 0.2 to 0.8.The density and viscosity results were correlated as a function of temperature and concentration of ionic liquid and amine with Redlich-Kister and Grunberg-Nissan models, respectively. Moreover, feed forward neural network model (ANN) is explored for correlating experimentally determined sound velocity and refractive index data. The measured properties are further analyzed to estimate various thermodynamic as well as transport properties such as diffusivity of CO2/H2S in the (HEF + AEP) and (HEF + AMP), thermal expansion coefficients, and isentropic compressibility, ΔG0, ΔS0, ΔH0, using the available models in the literature.
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Affiliation(s)
- Sweta Balchandani
- Department of Chemical Engineering, Indian Institute of Technology, Guwahati, 781039, India
- Department of Chemical Engineering, School of Technology, Pandit Deendayal Petroleum University, Raisan, Gandhinagar, 382007, India
| | - Bishnupada Mandal
- Department of Chemical Engineering, Indian Institute of Technology, Guwahati, 781039, India
| | - Swapnil Dharaskar
- Department of Chemical Engineering, School of Technology, Pandit Deendayal Petroleum University, Raisan, Gandhinagar, 382007, India.
| | - Arvind Kumar
- Salt and Marine Chemicals Discipline, CSIR-Central Salt and Marine Chemicals Research Institute, Bhavnagar, 364002, India
| | - Syamalendu Bandyopadhyay
- Department of Chemical Engineering, School of Technology, Pandit Deendayal Petroleum University, Raisan, Gandhinagar, 382007, India
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13
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Sandvik OS, Friberg J, Martinsson BG, van Velthoven PFJ, Hermann M, Zahn A. Intercomparison of in-situ aircraft and satellite aerosol measurements in the stratosphere. Sci Rep 2019; 9:15576. [PMID: 31666595 PMCID: PMC6821816 DOI: 10.1038/s41598-019-52089-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Accepted: 10/10/2019] [Indexed: 11/18/2022] Open
Abstract
Aerosol composition and optical scattering from particles in the lowermost stratosphere (LMS) have been studied by comparing in-situ aerosol samples from the IAGOS-CARIBIC passenger aircraft with vertical profiles of aerosol backscattering obtained from the CALIOP lidar aboard the CALIPSO satellite. Concentrations of the dominating fractions of the stratospheric aerosol, being sulphur and carbon, have been obtained from post-flight analysis of IAGOS-CARIBIC aerosol samples. This information together with literature data on black carbon concentrations were used to calculate the aerosol backscattering which subsequently is compared with measurements by CALIOP. Vertical optical profiles were taken in an altitude range of several kilometres from and above the northern hemispheric extratropical tropopause for the years 2006-2014. We find that the two vastly different measurement platforms yield different aerosol backscattering, especially close to the tropopause where the influence from tropospheric aerosol is strong. The best agreement is found when the LMS is affected by volcanism, i.e., at elevated aerosol loadings. At background conditions, best agreement is obtained some distance (>2 km) above the tropopause in winter and spring, i.e., at likewise elevated aerosol loadings from subsiding aerosol-rich stratospheric air. This is to our knowledge the first time the CALIPSO lidar measurements have been compared to in-situ long-term aerosol measurements.
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Affiliation(s)
| | - Johan Friberg
- Division of Nuclear Physics, Lund University, Lund, Sweden
| | | | | | - Markus Hermann
- Leibniz Institute for Tropospheric Research, Leipzig, Germany
| | - Andreas Zahn
- Institute of Meteorology and Climate Research, Institute of Technology, Karlsruhe, Germany
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Bouteloup R, Mathieu D. Predicting dielectric constants of pure liquids: fragment-based Kirkwood-Fröhlich model applicable over a wide range of polarity. Phys Chem Chem Phys 2019; 21:11043-11057. [PMID: 31089629 DOI: 10.1039/c9cp01704f] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In view of developing a procedure to predict the dielectric constant (εr) of pure liquids from molecular structure, a thorough analysis of prominent factors affecting this property is carried out. The results suggest that the orientational dipolar parameter gμ2 involved in the Kirkwood-Fröhlich theory may be estimated as a sum of additive contributions (gμ2)i associated with suitably defined polar fragments i. Associated with third-party models for the molar volume Vm and the refractive index nD, this provides a practical route to predicting εr for new compounds. Advantages over previous methods include: simplicity, as the present model relies on fragment-additivity and does not require 3D structures; sound physical bases; demonstrated applicability to polar liquids with εr values up to 200; predictive ability extensively demonstrated against large datasets (for a total of 1220 compounds) covering a broad structural diversity, resulting in values of the root mean square deviation/average percent error as low as 3.7/10% for data sets focused on simple organic compounds as considered in previous studies, although the inclusion of many alcohols in the data set leads to poorer statistics (5.0/32%) due to the lack of specific parameters for hydroxyl groups in distinct environments. The approach should be of special interest in the current search for new aprotic electrolytes aimed at improving the performances of electrochemical energy storage systems. Although its reliance on many fitting parameters restricts its domain of applicability, the present implementation is recommended over current procedures whenever possible. A Python script is provided to allow its straightforward application.
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Hudson RL, Coleman FM. Infrared intensities and molar refraction of amorphous dimethyl carbonate – comparisons to four interstellar molecules. Phys Chem Chem Phys 2019; 21:11284-11289. [DOI: 10.1039/c9cp01709g] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first measurements of infrared (IR) band intensities of solid dimethyl carbonate are presented along with measurements of this compound's refractive index and density near 15 K, neither of which has been reported.
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Affiliation(s)
- Reggie L. Hudson
- Astrochemistry Laboratory
- NASA Goddard Space Flight Center
- Greenbelt
- USA
| | - Falvia M. Coleman
- Astrochemistry Laboratory
- NASA Goddard Space Flight Center
- Greenbelt
- USA
- InuTeq
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16
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Mathieu D. Pencil and Paper Estimation of Hansen Solubility Parameters. ACS OMEGA 2018; 3:17049-17056. [PMID: 31458324 PMCID: PMC6643659 DOI: 10.1021/acsomega.8b02601] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2018] [Accepted: 11/29/2018] [Indexed: 05/14/2023]
Abstract
Simple procedures to estimate Hansen solubility parameter (HSP) components from structural formulas are investigated. The best results are obtained using a simple relationship with molar volume and refractivity for the dispersion component, and using additivity models based on tailored fragments specifically designed for the polar and hydrogen bonding components. Despite large errors for some classes of chemicals, including small inorganic molecules, ionic liquids, and high halogen compounds, these models yield average absolute deviations from reference on par with state-of-the-art models and lower than reported using molecular dynamics simulations or nonlinear quantitative structure-property relationship models based on a limited set of quantum chemical descriptors. In contrast to group contribution methods that are either more restricted in scope or heavily parameterized, they are thoroughly validated and very easy to apply. Furthermore, the errors observed are easy to rationalize and may usually be anticipated. This work sheds light on some limitations inherent to pure additivity approaches for HSP prediction and provides a first step toward better models. A Python script implementing the procedure and the fully detailed results are provided as the Supporting Information.
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