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Singh S, Zeh G, Freiherr J, Bauer T, Türkmen I, Grasskamp AT. Classification of substances by health hazard using deep neural networks and molecular electron densities. J Cheminform 2024; 16:45. [PMID: 38627862 PMCID: PMC11302296 DOI: 10.1186/s13321-024-00835-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Accepted: 03/23/2024] [Indexed: 08/09/2024] Open
Abstract
In this paper we present a method that allows leveraging 3D electron density information to train a deep neural network pipeline to segment regions of high, medium and low electronegativity and classify substances as health hazardous or non-hazardous. We show that this can be used for use-cases such as cosmetics and food products. For this purpose, we first generate 3D electron density cubes using semiempirical molecular calculations for a custom European Chemicals Agency (ECHA) subset consisting of substances labelled as hazardous and non-hazardous for cosmetic usage. Together with their 3-class electronegativity maps we train a modified 3D-UNet with electron density cubes to segment reactive sites in molecules and classify substances with an accuracy of 78.1%. We perform the same process on a custom food dataset (CompFood) consisting of hazardous and non-hazardous substances compiled from European Food Safety Authority (EFSA) OpenFoodTox, Food and Drug Administration (FDA) Generally Recognized as Safe (GRAS) and FooDB datasets to achieve a classification accuracy of 64.1%. Our results show that 3D electron densities and particularly masked electron densities, calculated by taking a product of original electron densities and regions of high and low electronegativity can be used to classify molecules for different use-cases and thus serve not only to guide safe-by-design product development but also aid in regulatory decisions. SCIENTIFIC CONTRIBUTION: We aim to contribute to the diverse 3D molecular representations used for training machine learning algorithms by showing that a deep learning network can be trained on 3D electron density representation of molecules. This approach has previously not been used to train machine learning models and it allows utilization of the true spatial domain of the molecule for prediction of properties such as their suitability for usage in cosmetics and food products and in future, to other molecular properties. The data and code used for training is accessible at https://github.com/s-singh-ivv/eDen-Substances .
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Affiliation(s)
- Satnam Singh
- Department of Sensory Analytics and Technologies, Fraunhofer Institute for Process Engineering and Packaging IVV, Giggenhauser Str. 35, 85354, Freising, Germany
- Department of Psychiatry and Psychotherapy, Friedrich-Alexander-Universität Erlangen-Nürnberg, Schwabachanlage 6, 91054, Erlangen, Germany
| | - Gina Zeh
- Department of Sensory Analytics and Technologies, Fraunhofer Institute for Process Engineering and Packaging IVV, Giggenhauser Str. 35, 85354, Freising, Germany
| | - Jessica Freiherr
- Department of Sensory Analytics and Technologies, Fraunhofer Institute for Process Engineering and Packaging IVV, Giggenhauser Str. 35, 85354, Freising, Germany
- Department of Psychiatry and Psychotherapy, Friedrich-Alexander-Universität Erlangen-Nürnberg, Schwabachanlage 6, 91054, Erlangen, Germany
| | - Thilo Bauer
- Computer Chemistry Center, Friedrich-Alexander-Universität Erlangen-Nürnberg, Nägelsbachstr. 25, 91052, Erlangen, Germany
| | - Isik Türkmen
- Department of Sensory Analytics and Technologies, Fraunhofer Institute for Process Engineering and Packaging IVV, Giggenhauser Str. 35, 85354, Freising, Germany
| | - Andreas T Grasskamp
- Department of Sensory Analytics and Technologies, Fraunhofer Institute for Process Engineering and Packaging IVV, Giggenhauser Str. 35, 85354, Freising, Germany.
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2
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Mikhailov IF, Mikhailov AI. Method for determining the electronegativity of bound atoms of chemical elements with a small atomic number. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2023; 94:064103. [PMID: 37862507 DOI: 10.1063/5.0153591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Accepted: 05/28/2023] [Indexed: 10/22/2023]
Abstract
The classical approach of James and Brindley for determining the shielding of a nucleus by electrons from the atomic form factor of the scattering of x rays is generalized for atoms in a bound state. It is shown that for chemical elements with atomic number Z < 10, the ratio of the peaks of coherent IR and incoherent IC scattering in the range of (sin θ)/λ from 0.7 to 2.0 Å-1 is determined by the form factor of scattering by internal electrons of the (1, 0) level. For each atom in a multicomponent system, there is only one adjustable parameter-the effective charge Z* = (Z - s), which characterizes the shielding of the nucleus by electrons. Fitting the dependence IR/IC ((sin θ)/λ) allows you to determine Z* for each free or bound atom and calculate its electronegativity. The values of the electronegativity of lithium, boron, carbon, oxygen, and fluorine in compounds with different types of chemical bonds are analyzed.
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Affiliation(s)
- Igor F Mikhailov
- National Technical University "Kharkiv Polytechnic Institute", 2, Kyrpychova str., 61002 Kharkiv, Ukraine
| | - Anton I Mikhailov
- National Technical University "Kharkiv Polytechnic Institute", 2, Kyrpychova str., 61002 Kharkiv, Ukraine
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3
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González-González S, Franco-Pérez M, Jardínez C, Cariño-Moreno JJ, Ramírez-Sotelo MG, Zamudio-Medina A. Synthesis, characterization, and quantum chemistry local chemical reactivity description of new phosphorylated derivatives of piperazine. PHOSPHORUS SULFUR 2023. [DOI: 10.1080/10426507.2023.2193404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023]
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4
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Chulanova EA, Radiush EA, Semenov NA, Hupf E, Irtegova IG, Kosenkova YS, Bagryanskaya IY, Shundrin LA, Beckmann J, Zibarev AV. Tuning Molecular Electron Affinities against Atomic Electronegativities by Spatial Expansion of a π-System. Chemphyschem 2023; 24:e202200876. [PMID: 36661050 DOI: 10.1002/cphc.202200876] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Revised: 01/11/2023] [Accepted: 01/19/2023] [Indexed: 01/21/2023]
Abstract
2,1,3-Benzochalcogenadiazoles C6 R4 N2 E (E/R; E=S, Se, Te; R=H, F, Cl, Br, I) and C6 H2 R2 N2 E (E/R'; E=S, Se, Te; R=Br, I) are 10π-electron hetarenes. By CV/EPR measurements, DFT calculations, and QTAIM and ELI-D analyses, it is shown that their molecular electron affinities (EAs) increase with decreasing Allen electronegativities and electron affinities of the E and non-hydrogen R (except Cl) atoms. DFT calculations for E/R+e⋅- →[E/R]⋅- electron capture reveal negative ΔG values numerically increasing with increasing atomic numbers of the E and R atoms; positive ΔS has a minor influence. It is suggested that the EA increase is caused by more effective charge/spin delocalization in the radical anions of heavier derivatives due to contributions from diffuse (a real-space expanded) p-AOs of the heavier E and R atoms; and that this counterintuitive effect might be of the general character.
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Affiliation(s)
- Elena A Chulanova
- Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, 630090, Novosibirsk, Russian Federation.,Current address: Institute for Applied Physics, University of Tübingen, 72076, Tübingen, Germany
| | - Ekaterina A Radiush
- Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, 630090, Novosibirsk, Russian Federation
| | - Nikolay A Semenov
- Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, 630090, Novosibirsk, Russian Federation
| | - Emanuel Hupf
- Institute for Inorganic Chemistry and Crystallography, University of Bremen, 28359, Bremen, Germany
| | - Irina G Irtegova
- Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, 630090, Novosibirsk, Russian Federation
| | - Yulia S Kosenkova
- Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, 630090, Novosibirsk, Russian Federation
| | - Irina Yu Bagryanskaya
- Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, 630090, Novosibirsk, Russian Federation
| | - Leonid A Shundrin
- Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, 630090, Novosibirsk, Russian Federation
| | - Jens Beckmann
- Institute for Inorganic Chemistry and Crystallography, University of Bremen, 28359, Bremen, Germany
| | - Andrey V Zibarev
- Novosibirsk Institute of Organic Chemistry, Siberian Branch of the Russian Academy of Sciences, 630090, Novosibirsk, Russian Federation
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5
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Kumari D, Saloni, Tandon H, Labarca M, Chakraborty T. An FSGO based Electronegativity Scale invoking the Electrophilicity Index. ChemistrySelect 2022. [DOI: 10.1002/slct.202202238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- Dimple Kumari
- Department of Chemistry and Biochemistry Sharda School of Basic Sciences and Research Sharda University Greater Noida 201310 India
| | - Saloni
- Department of Chemistry and Biochemistry Sharda School of Basic Sciences and Research Sharda University Greater Noida 201310 India
| | - Hiteshi Tandon
- Department of Chemistry Manipal University Jaipur Jaipur 303007 India
| | - Martín Labarca
- Facultad de Filosofia y Letras Instituto de Filosofia “Doctor Alejandro Korn” CONICET - Universidad de Buenos Aires Puán 481 4to Piso, Oficina 431 1406 - Ciudad Autónoma de Buenos Aires Argentina
| | - Tanmoy Chakraborty
- Department of Chemistry and Biochemistry Sharda School of Basic Sciences and Research Sharda University Greater Noida 201310 India
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Geedkar D, Kumar A, Sharma P. Molecular Iodine-Catalyzed Synthesis of Imidazo[1,2- a]Pyridines: Screening of Their In Silico Selectivity, Binding Affinity to Biological Targets, and Density Functional Theory Studies Insight. ACS OMEGA 2022; 7:22421-22439. [PMID: 35811892 PMCID: PMC9260945 DOI: 10.1021/acsomega.2c01570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Accepted: 06/01/2022] [Indexed: 06/15/2023]
Abstract
The present paper discloses an ultrasonication strategy assisted by molecular iodine as an environmentally benign catalyst leading to the synthesis of pharmacologically significant imidazo[1,2-a]pyridine scaffolds. The molecular-iodine-catalyzed approach for the synthesis of biologically active synthetic equivalents was achieved through three-component coupling embracing 2-aminopyridine derivatives, pertinent acetophenones, and dimedone in water medium under aerobic conditions. The higher product yield (up to 96%) with a miniature reaction time and modest catalyst loading as demonstrated by higher ecological compatibility and sustainability factors are fascinating features of this protocol. The structures of synthesized compounds were accomplished through FT-IR, 1H NMR,13C NMR, mass, and elemental analysis data. The virtual screening of synthetic moieties was performed to ascertain the in silico selectivity and binding affinities against several biological targets. Lipinski's rules of five, ADMET, and TOPKAT descriptors were used to evaluate the drug-likeness assets. Furthermore, a quantum computational study was computed at the B3LYP/6-311G++(d,p) level of theory to investigate the density functional theory-based chemical reactivity parameters and HOMO-LUMO energy gap of the synthesized derivatives. The present studies open the way for in vitro and in vivo testing of synthesized derivatives as potent inhibitors with an improved pharmacological profile against farnesyl diphosphate synthase, phosphodiesterase III, CXCR4, and GABAa receptor agonists.
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Ornelas-Cruz I, González I, Pilo J, Trejo A, Oviedo-Roa R, Cruz-Irisson M. Impact of alkaline-earth doping on electronic properties of the photovoltaic perovskite CsSnI 3: insights from a DFT perspective. Dalton Trans 2022; 51:6607-6621. [PMID: 35383786 DOI: 10.1039/d1dt04041c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The oxidation of Sn(II) to the more stable Sn(IV) degrades the photovoltaic perovskite material CsSnI3; however, this problem can be counteracted via alkaline-earth (AE) doping. In this work, the electronic properties of CsSn1-xAExI3, with x = 0 and 0.25, and AE = Mg and Ca, were investigated via Density Functional Theory. It is proven that the synthetic reactions of all these perovskites are thermodynamically viable. Besides, a slight strengthening in the metal-halide bonds is found in the Mg-doped perovskite; consequently, it exhibits the greatest bulk modulus. Nevertheless, the opposite occurrs with the Ca-doped perovskite, which has the smallest bulk modulus due to the weakening of its metal-halide bonds. The calculated bandgaps for CsSnI3, Mg-doped and Ca-doped perovskites are 1.11, 1.32 and 1.55 eV, respectively, remaining remarkably close to the best photovoltaic-performing value for single-junction solar cells of 1.34 eV. Nevertheless, an indirect bandgap was predicted under Mg-doping. These results support the possibility of implementing AE-doped perovskites as absorber materials in single-junction solar cells, which can deliver higher output voltages than that using CsSnI3. Finally, it was found that Sr or Ba doping could result in semiconductors with bandgaps close to 2.0 eV.
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Affiliation(s)
- Iván Ornelas-Cruz
- Instituto Politécnico Nacional, ESIME-Culhuacán, Av. Santa Ana 1000, 04440, Ciudad de México, Mexico.
| | - Israel González
- Instituto Politécnico Nacional, ESIME-Culhuacán, Av. Santa Ana 1000, 04440, Ciudad de México, Mexico.
| | - Jorge Pilo
- Instituto Politécnico Nacional, ESIME-Culhuacán, Av. Santa Ana 1000, 04440, Ciudad de México, Mexico.
| | - Alejandro Trejo
- Instituto Politécnico Nacional, ESIME-Culhuacán, Av. Santa Ana 1000, 04440, Ciudad de México, Mexico.
| | - Raúl Oviedo-Roa
- Instituto Mexicano del Petróleo, Eje Central Lázaro Cárdenas Norte 152, 07730, Ciudad de México, Mexico
| | - Miguel Cruz-Irisson
- Instituto Politécnico Nacional, ESIME-Culhuacán, Av. Santa Ana 1000, 04440, Ciudad de México, Mexico.
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8
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Fizer M, Fizer O, Barbalat D, Shishkina S, Snigur D. Structural peculiarities of new benzopyrylium dyes: X-ray, FT-IR, and DFT complex study. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.132178] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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9
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Zhou HP, Wu SX, Duan YC, Gao FW, Pan QQ, Kan YH, Su ZM. A theoretical study on the donor ability adjustment of tris(2,4,6-trichlorophenyl)methyl-triarylamine (TTM-TPA) radicals aiming to develop better organic luminescent materials. NEW J CHEM 2022. [DOI: 10.1039/d2nj01548j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Spin-unrestricted DFT and spin-unrestricted TDDFT calculations were performed to systematically investigate the correlation between the electron donating ability of donors and photophysical properties in D–A luminescent radicals.
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Affiliation(s)
- Hai-Ping Zhou
- Key Laboratory of Electrochemical Energy Storage and Energy Conversion of Hainan Province, School of Chemistry & Chemical Engineering, Hainan Normal University, Haikou 571158, China
- School of Chemistry and Environmental Engineering, Jilin Provincial Science and Technology Innovation Center of Optical Materials and Chemistry, Changchun University of Science and Technology, 7989 Weixing Road, Changchun 130012, China
| | - Shui-Xing Wu
- Key Laboratory of Electrochemical Energy Storage and Energy Conversion of Hainan Province, School of Chemistry & Chemical Engineering, Hainan Normal University, Haikou 571158, China
| | - Ying-Chen Duan
- School of Chemistry and Environmental Engineering, Jilin Provincial Science and Technology Innovation Center of Optical Materials and Chemistry, Changchun University of Science and Technology, 7989 Weixing Road, Changchun 130012, China
| | - Feng-Wei Gao
- School of Chemistry and Environmental Engineering, Jilin Provincial Science and Technology Innovation Center of Optical Materials and Chemistry, Changchun University of Science and Technology, 7989 Weixing Road, Changchun 130012, China
| | - Qing-Qing Pan
- School of Chemistry and Environmental Engineering, Jilin Provincial Science and Technology Innovation Center of Optical Materials and Chemistry, Changchun University of Science and Technology, 7989 Weixing Road, Changchun 130012, China
| | - Yu-He Kan
- Jiangsu Province Key Laboratory for Chemistry of Low-Dimensional Materials, School of Chemistry and Chemical Engineering, Huaiyin Normal University, Huai'an 223300, China
| | - Zhong-Min Su
- School of Chemistry and Environmental Engineering, Jilin Provincial Science and Technology Innovation Center of Optical Materials and Chemistry, Changchun University of Science and Technology, 7989 Weixing Road, Changchun 130012, China
- Institute of Functional Material Chemistry, Faculty of Chemistry & National & Local United Engineering Laboratory for Power Battery, Northeast Normal University, Changchun 130024, China
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10
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Singh K, Siwach P. Synthesis, spectroscopic, theoretical and biological evaluation of novel Schiff base complexes of divalent transition metals. Appl Organomet Chem 2021. [DOI: 10.1002/aoc.6553] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Kiran Singh
- Department of Chemistry Kurukshetra University Kurukshetra India
| | - Preeti Siwach
- Department of Chemistry Kurukshetra University Kurukshetra India
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11
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Van Lommel R, Verschueren RH, De Borggraeve WM, De Vleeschouwer F, Stuyver T. Can the Philicity of Radicals Be Influenced by Oriented External Electric Fields? Org Lett 2021; 24:1-5. [PMID: 34652164 DOI: 10.1021/acs.orglett.1c02935] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Herein, the effects of an electric field on radicals are investigated for a set of model radicals with varying complexity. An electric field impacts the intrinsic philicity of a radical, as quantified by the global electrophilicity index, ω. The extent of change in philicity depends on the directionality and strength of the applied electric field and the dipole moment and polarizability of the radical.
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Affiliation(s)
- Ruben Van Lommel
- Molecular Design and Synthesis, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven Chem&Tech, Box 2404, 3001 Leuven, Belgium.,Eenheid Algemene Chemie (ALGC), Department of Chemistry, Vrije Universiteit Brussel (VUB), Pleinlaan 2, 1050 Brussels, Belgium
| | - Rik H Verschueren
- Molecular Design and Synthesis, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven Chem&Tech, Box 2404, 3001 Leuven, Belgium
| | - Wim M De Borggraeve
- Molecular Design and Synthesis, Department of Chemistry, KU Leuven, Celestijnenlaan 200F, Leuven Chem&Tech, Box 2404, 3001 Leuven, Belgium
| | - Freija De Vleeschouwer
- Eenheid Algemene Chemie (ALGC), Department of Chemistry, Vrije Universiteit Brussel (VUB), Pleinlaan 2, 1050 Brussels, Belgium
| | - Thijs Stuyver
- Eenheid Algemene Chemie (ALGC), Department of Chemistry, Vrije Universiteit Brussel (VUB), Pleinlaan 2, 1050 Brussels, Belgium.,Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
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12
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Rasool F, Khalid M, Yar M, Ayub K, Tariq M, Hussain A, Lateef M, Kashif M, Iqbal S. Facile synthesis, DNA binding, Urease inhibition, anti-oxidant, molecular docking and DFT studies of 3-(3-Bromo-phenyl)-1-(2-trifluoromethyl-phenyl)-propenone and 3-(3-Bromo-5 chloro-phenyl)-1-(2-trifluoromethyl-phenyl)-propenone. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.116302] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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13
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Tandon H, Labarca M, Chakraborty T. A Scale of Atomic Electronegativity Based on Floating Spherical Gaussian Orbital Approach. ChemistrySelect 2021. [DOI: 10.1002/slct.202101142] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Hiteshi Tandon
- Department of Chemistry Manipal University Jaipur Jaipur 303 007 India
| | - Martín Labarca
- Facultad de Filosofia y Letras Instituto de Filosofia “Doctor Alejandro Korn” CONICET - Universidad de Buenos Aires Puán 481, 4to Piso, Oficina 431 1406 - Ciudad Autónoma de Buenos Aires Argentina
| | - Tanmoy Chakraborty
- Department of Chemistry and Biochemistry School of Basic Sciences and Research Sharda University Greater Noida 201 310 India
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14
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Tantardini C, Oganov AR. Thermochemical electronegativities of the elements. Nat Commun 2021; 12:2087. [PMID: 33828104 PMCID: PMC8027013 DOI: 10.1038/s41467-021-22429-0] [Citation(s) in RCA: 65] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 03/16/2021] [Indexed: 02/01/2023] Open
Abstract
Electronegativity is a key property of the elements. Being useful in rationalizing stability, structure and properties of molecules and solids, it has shaped much of the thinking in the fields of structural chemistry and solid state chemistry and physics. There are many definitions of electronegativity, which can be roughly classified as either spectroscopic (these are defined for isolated atoms) or thermochemical (characterizing bond energies and heats of formation of compounds). The most widely used is the thermochemical Pauling's scale, where electronegativities have units of eV-1/2. Here we identify drawbacks in the definition of Pauling's electronegativity scale-and, correcting them, arrive at our thermochemical scale, where electronegativities are dimensionless numbers. Our scale displays intuitively correct trends for the 118 elements and leads to an improved description of chemical bonding (e.g., bond polarity) and thermochemistry.
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Affiliation(s)
- Christian Tantardini
- Skolkovo Institute of Science and Technology, Bolshoi Boulevard 30, Moscow, 121025, Russian Federation.
- Institute of Solid State Chemistry and Mechanochemistry SB RAS, 630128, Kutateladze 18, Novosibirsk, Russian Federation.
| | - Artem R Oganov
- Skolkovo Institute of Science and Technology, Bolshoi Boulevard 30, Moscow, 121025, Russian Federation.
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15
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Subudhi S, Tripathy SP, Parida K. Highlights of the characterization techniques on inorganic, organic (COF) and hybrid (MOF) photocatalytic semiconductors. Catal Sci Technol 2021. [DOI: 10.1039/d0cy02034f] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
This review is dedicated to the brave COVID warriors fighting against the COVID-2019 pandemic.
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Affiliation(s)
- Satyabrata Subudhi
- Centre for Nanoscience and Nanotechnology
- Siksha ‘O’ Anusandhan (Deemed to be University)
- Bhubaneswar-751030
- India
| | - Suraj Prakash Tripathy
- Centre for Nanoscience and Nanotechnology
- Siksha ‘O’ Anusandhan (Deemed to be University)
- Bhubaneswar-751030
- India
| | - Kulamani Parida
- Centre for Nanoscience and Nanotechnology
- Siksha ‘O’ Anusandhan (Deemed to be University)
- Bhubaneswar-751030
- India
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16
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Shi L, Yan C, Li Y, Yang L, Mao W, Xia W, Zhang L, Chen Y, Zhang W. Quantitative and systematic designing of fluorophores enables ultrasensitive distinguishing carbonyls. NEW J CHEM 2021. [DOI: 10.1039/d1nj01777b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The well explored fluorescent reagent NH-4 could exhibit a high fluorescence yield and excellent reactivity towards carbonyl species, which opened up a new efficient way to develop fluorophores for the determination of trace molecules.
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Affiliation(s)
- Lei Shi
- School of Chemistry and Molecular Engineering
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Chenxu Yan
- Key Laboratory for Advanced Materials
- Feringa Nobel Prize Scientist Joint Research Centre
- Institute of Applied Chemistry
- East China University of Science and Technology
- Shanghai 200237
| | - Yunyu Li
- School of Chemistry and Molecular Engineering
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Lixiang Yang
- Shenzhen Bay Laboratory
- BayRay Innovation Centre
- Shenzhen
- P. R. China
| | - Wenle Mao
- Key Laboratory for Advanced Materials
- Feringa Nobel Prize Scientist Joint Research Centre
- Institute of Applied Chemistry
- East China University of Science and Technology
- Shanghai 200237
| | - Wei Xia
- School of Chemistry and Molecular Engineering
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Lingfan Zhang
- School of Chemistry and Molecular Engineering
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Yu Chen
- Key Laboratory for Advanced Materials
- Feringa Nobel Prize Scientist Joint Research Centre
- Institute of Applied Chemistry
- East China University of Science and Technology
- Shanghai 200237
| | - Wenqing Zhang
- School of Chemistry and Molecular Engineering
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
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17
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Qu HJ, Yuan L, Jia CX, Yu HT, Xu H. DFT Investigation of Hydrogen Atom Abstraction from NHC-Boranes by Methyl, Ethyl and Cyanomethyl Radicals-Composition and Correlation Analysis of Kinetic Barriers. Molecules 2020; 25:molecules25194509. [PMID: 33019654 PMCID: PMC7582687 DOI: 10.3390/molecules25194509] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 09/21/2020] [Accepted: 09/29/2020] [Indexed: 11/20/2022] Open
Abstract
Understanding the hydrogen atom abstraction (HAA) reactions of N-heterocyclic carbene (NHC)-boranes is essential for extending the practical applications of boron chemistry. In this study, density functional theory (DFT) computations were performed for the HAA reactions of a series of NHC-boranes attacked by •CH2CN, Me• and Et• radicals. Using the computed data, we investigated the correlations of the activation and free energy barriers with their components, including the intrinsic barrier, the thermal contribution of the thermodynamic reaction energy to the kinetic barriers, the activation Gibbs free energy correction and the activation zero-point vibrational energy correction. Furthermore, to describe the dependence of the activation and free energy barriers on the thermodynamic reaction energy or reaction Gibbs free energy, we used a three-variable linear model, which was demonstrated to be more precise than the two-variable Evans–Polanyi linear free energy model and more succinct than the three-variable Marcus-theory-based nonlinear HAA model. The present work provides not only a more thorough understanding of the compositions of the barriers to the HAA reactions of NHC-boranes and the HAA reactivities of the substrates but also fresh insights into the suitability of various models for describing the relationships between the kinetic and thermodynamic physical quantities.
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Affiliation(s)
- Hong-jie Qu
- Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education) and School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China; (H.-j.Q.); (L.Y.); (C.-x.J.)
- College of Science, Heilongjiang Bayi Agricultural University, Daqing 163319, China
| | - Lang Yuan
- Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education) and School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China; (H.-j.Q.); (L.Y.); (C.-x.J.)
| | - Cai-xin Jia
- Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education) and School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China; (H.-j.Q.); (L.Y.); (C.-x.J.)
| | - Hai-tao Yu
- Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education) and School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China; (H.-j.Q.); (L.Y.); (C.-x.J.)
- Correspondence: (H.-t.Y.); (H.X.); Tel.: +86-451-86608616 (H.-t.Y.)
| | - Hui Xu
- Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education) and School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China; (H.-j.Q.); (L.Y.); (C.-x.J.)
- Correspondence: (H.-t.Y.); (H.X.); Tel.: +86-451-86608616 (H.-t.Y.)
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Qu HJ, Yuan L, Jia CX, Yu HT, Xu H. DFT investigation of hydrogen atom-abstraction reactions of NHC-boranes by various carbon-centered radicals: barriers and correlation analyses. RSC Adv 2020; 10:34752-34763. [PMID: 35514392 PMCID: PMC9057721 DOI: 10.1039/d0ra07638d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Accepted: 09/10/2020] [Indexed: 12/22/2022] Open
Abstract
In this study, we employed a quantum-mechanical computational method to investigate the hydrogen-atom abstraction reactions of two nitrogen heterocyclic carbene boranes (NHC-boranes), NHC-BH3 and NHC-BH2CN, by a series of carbon-centered radicals bearing various substituents. We explored the degree of correlation of the activation and free energy barriers to their components. Furthermore, we also investigated the effects of the radical and substituent sizes, nucleophilicity/electrophilicity indices, and the spin density distribution of the radical reactants on the three fundamental barriers and the thermal contribution of the reaction energy to the kinetic barrier. Using the generated data, we assessed the abilities of the various radical reactants to abstract the hydrogen atom from NHC-boranes. Further, we performed a similar analysis after dividing those radical reactants into four groups, which were classified based on the dominant factor affecting their electronic density distribution, which involves the inductive effect, conjugation, hyperconjugation, and the feedback of lone-pair electrons. The results and conclusions of this investigation not only provide insight into the relationships between some of the key kinetic and thermodynamic parameters, which is useful for understanding the dynamics of such hydrogen-abstraction reactions, but also provide information for selecting suitable radical reactants for further experimental investigations.
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Affiliation(s)
- Hong-Jie Qu
- Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education), School of Chemistry and Materials Science, Heilongjiang University Harbin 150080 P. R. China
- College of Science, Heilongjiang Bayi Agricultural University Daqing 163319 P. R. China
| | - Lang Yuan
- Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education), School of Chemistry and Materials Science, Heilongjiang University Harbin 150080 P. R. China
| | - Cai-Xin Jia
- Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education), School of Chemistry and Materials Science, Heilongjiang University Harbin 150080 P. R. China
| | - Hai-Tao Yu
- Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education), School of Chemistry and Materials Science, Heilongjiang University Harbin 150080 P. R. China
| | - Hui Xu
- Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education), School of Chemistry and Materials Science, Heilongjiang University Harbin 150080 P. R. China
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