151
|
Sharma G, Mitra S, Kamil SM, Ghosh SK. Shear-induced phase transition in the aqueous solution of an imidazolium-based ionic liquid. J Chem Phys 2023; 158:094904. [PMID: 36889950 DOI: 10.1063/5.0138078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023] Open
Abstract
An ionic liquid (IL) is a salt in the liquid state that consists of a cation and an anion, one of which possesses an organic component. Because of their non-volatile property, these solvents have a high recovery rate, and, hence, they are considered as environment-friendly green solvents. It is necessary to study the detailed physicochemical properties of these liquids for designing and processing techniques and find suitable operating conditions for IL-based systems. In the present work, the flow behavior of aqueous solutions of an imidazolium-based IL, 1-methyl-3-octylimidazolium chloride, is investigated, where the dynamic viscosity measurements indicate non-Newtonian shear thickening behavior in the solutions. Polarizing optical microscopy shows that the pristine samples are isotropic and transform into anisotropic after shear. These shear thickened liquid crystalline samples change into an isotropic phase upon heating, which is quantified by the differential scanning calorimetry. The small angle x-ray scattering study revealed that the pristine isotropic cubic phase of spherical micelles distort into non-spherical micelles. This has provided the detailed structural evolution of mesoscopic aggregates of the IL in an aqueous solution and the corresponding viscoelastic property of the solution.
Collapse
Affiliation(s)
- Gunjan Sharma
- Department of Physics, School of Natural Sciences, Shiv Nadar University, NH 91, Tehsil Dadri, G.B. Nagar, Uttar Pradesh 201314, India
| | - Saheli Mitra
- Department of Physics, School of Natural Sciences, Shiv Nadar University, NH 91, Tehsil Dadri, G.B. Nagar, Uttar Pradesh 201314, India
| | - Syed Mohammad Kamil
- Department of Physics, School of Natural Sciences, Shiv Nadar University, NH 91, Tehsil Dadri, G.B. Nagar, Uttar Pradesh 201314, India
| | - Sajal Kumar Ghosh
- Department of Physics, School of Natural Sciences, Shiv Nadar University, NH 91, Tehsil Dadri, G.B. Nagar, Uttar Pradesh 201314, India
| |
Collapse
|
152
|
Hohl T, Kremer RK, Ebbinghaus SG, Khan SA, Minár J, Hoch C. Influence of Disorder on the Bad Metal Behavior in Polar Amalgams. Inorg Chem 2023; 62:3965-3975. [PMID: 36821862 DOI: 10.1021/acs.inorgchem.2c04430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
The two new ternary amalgams K1-xRbxHg11 [x = 0.472(7)] and Cs3-xCaxHg20 [x = 0.20(3)] represent two different examples of how to create ternary compounds from binaries by statistical atom substitution. K1-xRbxHg11 is a Vegard-type mixed crystal of the isostructural binaries KHg11 and RbHg11 [cubic, BaHg11 structure type, space group Pm3̅m, a = 9.69143(3) Å, Rietveld refinement], whereas Cs3-xCaxHg20 is a substitution variant of the Rb3Hg20 structure type [cubic, space group Pm3̅n, a = 10.89553(14) Å, Rietveld refinement] for which a fully substituted isostructural binary Ca phase is unknown. In K1-xRbxHg11, the valence electron concentration (VEC) is not changed by the substitution, whereas in Cs3-xCaxHg20, the VEC increases with the Ca content. Amalgams of electropositive metals form polar metal bonds and show "bad metal" properties. By thermal analysis, magnetic susceptibility and resistivity measurements, and density functional theory calculations of the electronic structures, we investigate the effect of the structural disorder introduced by creating mixed-atom occupation on the physical properties of the two new polar amalgam systems.
Collapse
Affiliation(s)
- Timotheus Hohl
- Department Chemie, Ludwig-Maximilians-Universität München, 81377 München, Germany
| | - Reinhard K Kremer
- Max-Planck-Institut für Festkörperforschung Stuttgart, 70569 Stuttgart, Germany
| | - Stefan G Ebbinghaus
- Institut für Chemie, Martin-Luther-Universität Halle-Wittenberg, 06108 Halle (Saale), Germany
| | - Saleem A Khan
- New Technologies Research Center, University of West Bohemia, 30100 Pilsen, Czech Republic
| | - Ján Minár
- New Technologies Research Center, University of West Bohemia, 30100 Pilsen, Czech Republic
| | - Constantin Hoch
- Department Chemie, Ludwig-Maximilians-Universität München, 81377 München, Germany
| |
Collapse
|
153
|
Ghosh S, Roy RS, Nandi PK. Unveiling the theoretical aspects of superelectrophilic activation in an inverse demand Diels-Alder reaction. J Mol Model 2023; 29:89. [PMID: 36877401 DOI: 10.1007/s00894-023-05495-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Accepted: 02/27/2023] [Indexed: 03/07/2023]
Abstract
The present computational study using B3LYP functional and 6-31+G(d) basis set has been accomplished to investigate the mechanism of the inverse demand Diels-Alder reaction between pyridyl imine and propene. The highly charged dicationic superelectrophilic diene with exceptionally low-lying LUMO makes the cycloaddition reaction with propene more favorable by significantly lowering the activation energy. The Wiberg bond indices are calculated in accordance with the formation and breaking processes of bonds. The synchronicity concept is also utilized to explain the global nature of the reaction. A potential outcome of this investigation is the utilization of propene as a C2 building block in the industry.
Collapse
Affiliation(s)
- Subhadip Ghosh
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, 711103, India
| | - Ria Sinha Roy
- School of Mathematical and Computational Sciences, Indian Association for the Cultivation of Science, Jadavpur, Kolkata, 700032, India
| | - Prasanta K Nandi
- Department of Chemistry, Indian Institute of Engineering Science and Technology, Shibpur, Howrah, 711103, India.
| |
Collapse
|
154
|
Werner I, Griebel J, Masip-Sánchez A, López X, Załęski K, Kozłowski P, Kahnt A, Boerner M, Warneke Z, Warneke J, Monakhov KY. Hybrid Molecular Magnets with Lanthanide- and Countercation-Mediated Interfacial Electron Transfer between Phthalocyanine and Polyoxovanadate. Inorg Chem 2023; 62:3761-3775. [PMID: 36534941 DOI: 10.1021/acs.inorgchem.2c03599] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A series of {V12}-nuclearity polyoxovanadate cages covalently functionalized with one or sandwiched by two phthalocyaninato (Pc) lanthanide (Ln) moieties via V-O-Ln bonds were prepared and fully characterized for paramagnetic Ln = SmIII-ErIII and diamagnetic Ln = LuIII, including YIII. The LnPc-functionalized {V12O32} cages with fully oxidized vanadium centers in the ground state were isolated as (nBu4N)3[HV12O32Cl(LnPc)] and (nBu4N)2[HV12O32Cl(LnPc)2] compounds. As corroborated by a combined experimental (EPR, DC and AC SQUID, laser photolysis transient absorption spectroscopy, and electrochemistry) and computational (DFT, MD, and model Hamiltonian approach) methods, the compounds feature intra- and intermolecular electron transfer that is responsible for a partial reduction at V(3d) centers from VV to VIV in the solid state and at high sample concentrations. The effects are generally Ln dependent and are clearly demonstrated for the (nBu4N)3[HV12O32Cl(LnPc)] representative with Ln = LuIII or DyIII. Intramolecular charge transfer takes place for Ln = LuIII and occurs from a Pc ligand via the Ln center to the {V12O32} core of the same molecule, whereas for Ln = DyIII, only intermolecular charge transfer is allowed, which is realized from Pc in one molecule to the {V12O32} core of another molecule usually via the nBu4N+ countercation. For all Ln but DyIII, two of these phenomena may be present in different proportions. Besides, it is demonstrated that (nBu4N)3[HV12O32Cl(DyPc)] is a field-induced single molecule magnet with a maximal relaxation time of the order 10-3 s. The obtained results open up the way to further exploration and fine-tuning of these three modular molecular nanocomposites regarding tailoring and control of their Ln-dependent charge-separated states (induced by intramolecular transfer) and relaxation dynamics as well as of electron hopping between molecules. This should enable us to realize ultra-sensitive polyoxometalate powered quasi-superconductors, sensors, and data storage/processing materials for quantum technologies and neuromorphic computing.
Collapse
Affiliation(s)
- Irina Werner
- Leibniz Institute of Surface Engineering (IOM), Permoserstr. 15, Leipzig04318, Germany
| | - Jan Griebel
- Leibniz Institute of Surface Engineering (IOM), Permoserstr. 15, Leipzig04318, Germany
| | - Albert Masip-Sánchez
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, Marcel·lí Domingo 1, Tarragona43007, Spain
| | - Xavier López
- Departament de Química Física i Inorgànica, Universitat Rovira i Virgili, Marcel·lí Domingo 1, Tarragona43007, Spain
| | - Karol Załęski
- NanoBioMedical Centre, Adam Mickiewicz University in Poznań, Poznań61-614, Poland
| | - Piotr Kozłowski
- Institute of Spintronics and Quantum Information, Faculty of Physics, Adam Mickiewicz University in Poznań, ul. Uniwersytetu Poznańskiego 2, Poznań61-614, Poland
| | - Axel Kahnt
- Leibniz Institute of Surface Engineering (IOM), Permoserstr. 15, Leipzig04318, Germany
| | - Martin Boerner
- Leibniz Institute of Surface Engineering (IOM), Permoserstr. 15, Leipzig04318, Germany.,Institute of Inorganic Chemistry, Leipzig University, Johannisallee 29, Leipzig04103, Germany
| | - Ziyan Warneke
- Leibniz Institute of Surface Engineering (IOM), Permoserstr. 15, Leipzig04318, Germany.,Wilhelm-Ostwald-Institute for Physical and Theoretical Chemistry, Leipzig University, Linnéstr. 2, Leipzig04103, Germany
| | - Jonas Warneke
- Leibniz Institute of Surface Engineering (IOM), Permoserstr. 15, Leipzig04318, Germany.,Wilhelm-Ostwald-Institute for Physical and Theoretical Chemistry, Leipzig University, Linnéstr. 2, Leipzig04103, Germany
| | - Kirill Yu Monakhov
- Leibniz Institute of Surface Engineering (IOM), Permoserstr. 15, Leipzig04318, Germany
| |
Collapse
|
155
|
Guan XL, Sun R, Jin B, Yuan C, Wu YB. 3-D molecular stars with covalent axial bonding. J Comput Chem 2023; 44:1410-1417. [PMID: 36872591 DOI: 10.1002/jcc.27096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Revised: 02/13/2023] [Accepted: 02/17/2023] [Indexed: 03/07/2023]
Abstract
In designing three-dimensional (3-D) molecular stars, it is very difficult to enhance the molecular rigidity through forming the covalent bonds between the axial and equatorial groups because corresponding axial groups will generally break the delocalized π bond over equatorial frameworks and thus break their star-like arrangement. In this work, exemplified by designing the 3-D stars Be2 ©Be5 E5 + (E = Au, Cl, Br, I) with three delocalized σ bonds and delocalized π bond over the central Be2 ©Be5 moiety, we propose that the desired covalent bonding can be achieved by forming the delocalized σ bond(s) and delocalized π bond(s) simultaneously between the axial groups and equatorial framework. The covalency and rigidity of axial bonding can be demonstrated by the total Wiberg bond indices of 1.46-1.65 for axial Be atoms and ultrashort Be-Be distances of 1.834-1.841 Å, respectively. Beneficial also from the σ and π double aromaticity, these mono-cationic 3-D molecular stars are dynamically viable global energy minima with well-defined electronic structures, as reflected by wide HOMO-LUMO gaps (4.68-5.06 eV) and low electron affinities (4.70-4.82 eV), so they are the promising targets in the gas phase generation, mass-separation, and spectroscopic characterization.
Collapse
Affiliation(s)
- Xiao-Ling Guan
- Key Laboratory of Materials for Energy Conversion and Storage of Shanxi Province, Institute of Molecular Science, Shanxi University, Taiyuan, China.,Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Institute of Molecular Science, Shanxi University, Taiyuan, China
| | - Rui Sun
- Key Laboratory of Materials for Energy Conversion and Storage of Shanxi Province, Institute of Molecular Science, Shanxi University, Taiyuan, China.,Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Institute of Molecular Science, Shanxi University, Taiyuan, China
| | - Bo Jin
- Key Laboratory of Materials for Energy Conversion and Storage of Shanxi Province, Institute of Molecular Science, Shanxi University, Taiyuan, China.,Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Institute of Molecular Science, Shanxi University, Taiyuan, China
| | - Caixia Yuan
- Key Laboratory of Materials for Energy Conversion and Storage of Shanxi Province, Institute of Molecular Science, Shanxi University, Taiyuan, China.,Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Institute of Molecular Science, Shanxi University, Taiyuan, China
| | - Yan-Bo Wu
- Key Laboratory of Materials for Energy Conversion and Storage of Shanxi Province, Institute of Molecular Science, Shanxi University, Taiyuan, China.,Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education, Institute of Molecular Science, Shanxi University, Taiyuan, China
| |
Collapse
|
156
|
Liebman JF. Paradigms and paradoxes: stabilization, destabilization and resonance energy of α-diketones, dienes and derived radical ions. Struct Chem 2023. [DOI: 10.1007/s11224-023-02155-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
|
157
|
Fritzsche S, Maiorova AV, Wu Z. Radiative Recombination Plasma Rate Coefficients for Multiply Charged Ions. Atoms 2023; 11:50. [DOI: 10.3390/atoms11030050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023] Open
Abstract
Radiative recombination (RR) plasma rate coefficients are often applied to estimate electron densities and temperatures under quite different plasma conditions. Despite their frequent use, however, these rate coefficients are available only for selected (few-electron) ions and isoelectronic sequences, mainly because of the computational efforts required. To overcome this limitation, we report here a (relativistic) cascade model which helps compute fine-structure and shell-resolved as well as total RR plasma rate coefficients for many, if not most, elements of the periodic table. This model is based on Jac, the Jena Atomic Calculator, and supports studies on how the electron is captured in selected levels of the recombined ion, a relativistic (Maxwellian) electron distribution, or how the multipoles beyond the electric-dipole field in the electron-photon interaction affect the RR rate coefficients and, hence, the ionization and recombination dynamics of hot plasma. As a demonstration of this model, we compute, compare, and discuss different RR plasma rate coefficients for initially helium-like ions, with an emphasis especially on Fe24+ ions.
Collapse
|
158
|
Mariño-Ocampo N, Rodríguez DF, Guerra Díaz D, Zúñiga-Núñez D, Duarte Y, Fuentealba D, Zacconi FC. Direct Oral FXa Inhibitors Binding to Human Serum Albumin: Spectroscopic, Calorimetric, and Computational Studies. Int J Mol Sci 2023; 24:ijms24054900. [PMID: 36902328 PMCID: PMC10002493 DOI: 10.3390/ijms24054900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2022] [Revised: 02/26/2023] [Accepted: 03/01/2023] [Indexed: 03/06/2023] Open
Abstract
Direct FXa inhibitors are an important class of bioactive molecules (rivaroxaban, apixaban, edoxaban, and betrixaban) applied for thromboprophylaxis in diverse cardiovascular pathologies. The interaction of active compounds with human serum albumin (HSA), the most abundant protein in blood plasma, is a key research area and provides crucial information about drugs' pharmacokinetics and pharmacodynamic properties. This research focuses on the study of the interactions between HSA and four commercially available direct oral FXa inhibitors, applying methodologies including steady-state and time-resolved fluorescence, isothermal titration calorimetry (ITC), and molecular dynamics. The HSA complexation of FXa inhibitors was found to occur via static quenching, and the complex formation in the ground states affects the fluorescence of HSA, with a moderate binding constant of 104 M-1. However, the ITC studies reported significantly different binding constants (103 M-1) compared with the results obtained through spectrophotometric methods. The suspected binding mode is supported by molecular dynamics simulations, where the predominant interactions were hydrogen bonds and hydrophobic interactions (mainly π-π stacking interactions between the phenyl ring of FXa inhibitors and the indole moiety of Trp214). Finally, the possible implications of the obtained results regarding pathologies such as hypoalbuminemia are briefly discussed.
Collapse
Affiliation(s)
- Nory Mariño-Ocampo
- Escuela de Química, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Santiago 7820436, Chile
| | - Diego F. Rodríguez
- Escuela de Química, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Santiago 7820436, Chile
| | - Daniel Guerra Díaz
- Escuela de Química, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Santiago 7820436, Chile
| | - Daniel Zúñiga-Núñez
- Escuela de Química, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Santiago 7820436, Chile
| | - Yorley Duarte
- Center for Bioinformatics and Integrative Biology, Facultad de Ciencias de la Vida, Universidad Andrés Bello, Santiago 8370035, Chile
| | - Denis Fuentealba
- Escuela de Química, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Santiago 7820436, Chile
- Correspondence: (D.F.); (F.C.Z.)
| | - Flavia C. Zacconi
- Escuela de Química, Facultad de Química y de Farmacia, Pontificia Universidad Católica de Chile, Santiago 7820436, Chile
- Institute for Biological and Medical Engineering, Schools of Engineering, Medicine and Biological Sciences, Pontificia Universidad Católica de Chile, Santiago 7820436, Chile
- Centro de Investigaciones en Nanotecnología y Materiales Avanzados, CIEN-UC, Pontificia Universidad Católica de Chile, Santiago 7820436, Chile
- Center for Nanomedicine, Diagnostic & Drug Development (ND3), Universidad de Talca, Talca 3460000, Chile
- Correspondence: (D.F.); (F.C.Z.)
| |
Collapse
|
159
|
Zhou J, Wang Y, Li L. Regulating the Flow-Driven Translocation of Macromolecules through Nanochannels by Interfacial Physical Adsorption. Macromolecules 2023. [DOI: 10.1021/acs.macromol.2c02450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Affiliation(s)
- Jianing Zhou
- Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China
| | - Yiren Wang
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China
| | - Lianwei Li
- College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China
| |
Collapse
|
160
|
McCalmont SH, Vaz ICM, Oorts H, Gong Z, Moura L, Costa Gomes M. Insights into the Absorption of Hydrocarbon Gases in Phosphorus-Containing Ionic Liquids. J Phys Chem B 2023; 127:3402-3415. [PMID: 36867065 DOI: 10.1021/acs.jpcb.2c08051] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
Abstract
The solubility of ethane, ethylene, propane, and propylene was measured in two phosphorus-containing ionic liquids, trihexyltetradecylphosphonium bis(2,4,4-trimethylpentyl)phosphinate, [P6,6,6,14][DiOP], and 1-butyl-3-methylimidazolium dimethylphosphate, [C4C1Im][DMP], using an isochoric saturation method. The ionic liquid [C4C1Im][DMP] absorbed between 1 and 20 molecules of gas per 1000 ion pairs, at 313 K and 0.1 MPa, while [P6,6,6,14][DiOP] absorbed up to 169 molecules of propane per 1000 ion pairs under the same conditions. [C4C1Im][DMP] had a higher capacity to absorb olefins than paraffins, while the opposite was true for [P6,6,6,14][DiOP], with the former being slightly more selective than the later. From the analysis of the thermodynamic properties of solvation, we concluded that in both ionic liquids and for all of the studied gases the solvation is ruled by the entropy, even if its contribution is unfavorable. These results, together with density measurements, 2D NMR studies, and self-diffusion coefficients suggest that the gases' solubility is ruled mostly by nonspecific interactions with the ionic liquids and that the looser ion packing in [P6,6,6,14][DiOP] makes it easier to accommodate the gases compared to [C4C1Im][DMP].
Collapse
Affiliation(s)
- Sam H McCalmont
- QUILL Research Centre, Queen's University Belfast, School of Chemistry and Chemical Engineering, David Keir Building, 39-123 Stranmillis Road, Belfast BT9 5AG, U.K
| | - Inês C M Vaz
- Laboratoire de Chimie de l'ENS Lyon, CNRS and Université de Lyon, 46 allée d'Italie, 69364 Lyon, France
| | - Hanne Oorts
- Laboratoire de Chimie de l'ENS Lyon, CNRS and Université de Lyon, 46 allée d'Italie, 69364 Lyon, France
| | - Zheng Gong
- Laboratoire de Chimie de l'ENS Lyon, CNRS and Université de Lyon, 46 allée d'Italie, 69364 Lyon, France
| | - Leila Moura
- QUILL Research Centre, Queen's University Belfast, School of Chemistry and Chemical Engineering, David Keir Building, 39-123 Stranmillis Road, Belfast BT9 5AG, U.K
| | - Margarida Costa Gomes
- Laboratoire de Chimie de l'ENS Lyon, CNRS and Université de Lyon, 46 allée d'Italie, 69364 Lyon, France
| |
Collapse
|
161
|
Das A, Patil NT. Ligand-Enabled Gold-Catalyzed C(sp 2)–O Cross-Coupling Reactions. ACS Catal 2023. [DOI: 10.1021/acscatal.3c00338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Affiliation(s)
- Avishek Das
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal 462 066, India
| | - Nitin T. Patil
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhauri, Bhopal 462 066, India
| |
Collapse
|
162
|
Salpin J, Haldys V, Guillemin J, Mó O, Yáñez M, Montero‐Campillo MM. Reactivity of Cytosine with Alkylmercury Ions in the Gas Phase: the Critical Role of the Alkyl Chain. Isr J Chem 2023. [DOI: 10.1002/ijch.202300014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Affiliation(s)
- Jean‐Yves Salpin
- Université Paris-Saclay Univ Evry CY Cergy Paris Université CNRS LAMBE 91025 Evry-Courcouronnes France
| | - Violette Haldys
- Université Paris-Saclay Univ Evry CY Cergy Paris Université CNRS LAMBE 91025 Evry-Courcouronnes France
| | - Jean‐Claude Guillemin
- Univ Rennes Ecole Nationale Supérieure de Chimie de Rennes CNRS ISCR – UMR6226 F-35000 Rennes France
| | - Otilia Mó
- Departamento de Química, Módulo 13 Facultad de Ciencias, and Institute of Advanced Chemical Sciences (IAdChem) Universidad Autónoma de Madrid Campus de Excelencia UAM-CSIC Cantoblanco, 28049 Madrid Spain
| | - Manuel Yáñez
- Departamento de Química, Módulo 13 Facultad de Ciencias, and Institute of Advanced Chemical Sciences (IAdChem) Universidad Autónoma de Madrid Campus de Excelencia UAM-CSIC Cantoblanco, 28049 Madrid Spain
| | - M. Merced Montero‐Campillo
- Departamento de Química, Módulo 13 Facultad de Ciencias, and Institute of Advanced Chemical Sciences (IAdChem) Universidad Autónoma de Madrid Campus de Excelencia UAM-CSIC Cantoblanco, 28049 Madrid Spain
| |
Collapse
|
163
|
Msezane AZ, Felfli Z. Rigorous Negative Ion Binding Energies in Low-Energy Electron Elastic Collisions with Heavy Multi-Electron Atoms and Fullerene Molecules: Validation of Electron Affinities. Atoms 2023; 11:47. [DOI: 10.3390/atoms11030047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023] Open
Abstract
Dramatically sharp resonances manifesting stable negative ion formation characterize Regge pole-calculated low-energy electron elastic total cross sections (TCSs) of heavy multi-electron systems. The novelty of the Regge pole analysis is in the extraction of rigorous and unambiguous negative ion binding energies (BEs), corresponding to the measured electron affinities (EAs) of the investigated multi-electron systems. The measured EAs have engendered the crucial question: is the EA of multi-electron atoms and fullerene molecules identified with the BE of the attached electron in the ground, metastable or excited state of the formed negative ion during a collision? Inconsistencies in the meaning of the measured EAs are elucidated and new EA values for Bk, Cf, Fm, and Lr are presented.
Collapse
|
164
|
He X, Li M, Shu B, Fernandes R, Moshammer K. Exploring the Effect of Different Reactivity Promoters on the Oxidation of Ammonia in a Jet-Stirred Reactor. J Phys Chem A 2023; 127:1923-1940. [PMID: 36800895 DOI: 10.1021/acs.jpca.2c07547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
The low reactivity of ammonia (NH3) is the main barrier to applying neat NH3 as fuel in technical applications, such as internal combustion engines and gas turbines. Introducing combustion promoters as additives in NH3-based fuel can be a feasible solution. In this work, the oxidation of ammonia by adding different reactivity promoters, i.e., hydrogen (H2), methane (CH4), and methanol (CH3OH), was investigated in a jet-stirred reactor (JSR) at temperatures between 700 and 1200 K and at a pressure of 1 bar. The effect of ozone (O3) was also studied, starting from an extremely low temperature (450 K). Species mole fraction profiles as a function of the temperature were measured by molecular-beam mass spectrometry (MBMS). With the help of the promoters, NH3 consumption can be triggered at lower temperatures than in the neat NH3 case. CH3OH has the most prominent effect on enhancing the reactivity, followed by H2 and CH4. Furthermore, two-stage NH3 consumption was observed in NH3/CH3OH blends, whereas no such phenomenon was found by adding H2 or CH4. The mechanism constructed in this work can reasonably reproduce the promoting effect of the additives on NH3 oxidation. The cyanide chemistry is validated by the measurement of HCN and HNCO. The reaction CH2O + NH2 ⇄ HCO + NH3 is responsible for the underestimation of CH2O in NH3/CH4 fuel blends. The discrepancies observed in the modeling of NH3 fuel blends are mainly due to the deviations in the neat NH3 case. The total rate coefficient and the branching ratio of NH2 + HO2 are still controversial. The high branching fraction of the chain-propagating channel NH2 + HO2 ⇄ H2NO + OH improves the model performance under low-pressure JSR conditions for neat NH3 but overestimates the reactivity for NH3 fuel blends. Based on this mechanism, the reaction pathway and rate of production analyses were conducted. The HONO-related reaction routine was found to be activated uniquely by adding CH3OH, which enhances the reactivity most significantly. It was observed from the experiment that adding ozone to the oxidant can effectively initiate NH3 consumption at temperatures below 450 K but unexpectedly inhibit the NH3 consumption at temperatures higher than 900 K. The preliminary mechanism reveals that adding the elementary reactions between NH3-related species and O3 is effective for improving the model performance, but their rate coefficients have to be refined.
Collapse
Affiliation(s)
- Xiaoyu He
- Department of Physical Chemistry, Physikalisch-Technische Bundesanstalt, 38116 Braunschweig, Germany
| | - Mengdi Li
- Department of Physical Chemistry, Physikalisch-Technische Bundesanstalt, 38116 Braunschweig, Germany
| | - Bo Shu
- Department of Physical Chemistry, Physikalisch-Technische Bundesanstalt, 38116 Braunschweig, Germany
| | - Ravi Fernandes
- Department of Physical Chemistry, Physikalisch-Technische Bundesanstalt, 38116 Braunschweig, Germany
| | - Kai Moshammer
- Department of Physical Chemistry, Physikalisch-Technische Bundesanstalt, 38116 Braunschweig, Germany
| |
Collapse
|
165
|
Galvez Vallejo JL, Tow GM, Maginn EJ, Pham BQ, Datta D, Gordon MS. Quantum Chemical Modeling of Propellant Degradation. J Phys Chem A 2023; 127:1874-1882. [PMID: 36791340 DOI: 10.1021/acs.jpca.2c08722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
An ab initio quantum chemical approach for the modeling of propellant degradation is presented. Using state-of-the-art bonding analysis techniques and composite methods, a series of potential degradation reactions are devised for a sample hydroxyl-terminated-polybutadiene (HTPB) type solid fuel. By applying thermochemical procedures and isodesmic reactions, accurate thermochemical quantities are obtained using a modified G3 composite method based on the resolution of the identity. The calculated heats of formation for the different structures produced presents an ∼2 kcal/mol average error when compared against experimental values.
Collapse
Affiliation(s)
- Jorge L Galvez Vallejo
- Department of Chemistry and Ames Laboratory, Iowa State University, Ames, Iowa 50014, United States
| | - Garrett M Tow
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Edward J Maginn
- Department of Chemical and Biomolecular Engineering, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Buu Q Pham
- Department of Chemistry and Ames Laboratory, Iowa State University, Ames, Iowa 50014, United States
| | - Dipayan Datta
- Department of Chemistry and Ames Laboratory, Iowa State University, Ames, Iowa 50014, United States
| | - Mark S Gordon
- Department of Chemistry and Ames Laboratory, Iowa State University, Ames, Iowa 50014, United States
| |
Collapse
|
166
|
Dombrowski DR, Schulz T, Kleinschmidt M, Marian CM. R2022: A DFT/MRCI Ansatz with Improved Performance for Double Excitations. J Phys Chem A 2023; 127:2011-2025. [PMID: 36799533 DOI: 10.1021/acs.jpca.2c07951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
A reformulation of the combined density functional theory and multireference configuration interaction method (DFT/MRCI) is presented. Expressions for ab initio matrix elements are used to derive correction terms for a new effective Hamiltonian. On the example of diatomic carbon, the correction terms are derived, focusing on the doubly excited 1Δg state, which was problematic in previous formulations of the method, as were double excitations in general. The derivation shows that a splitting of the parameters for intra- and interorbital interactions is necessary for a concise description of the underlying physics. Results for 1La and 1Lb states in polyacenes and 1Au and 1Ag states in mini-β-carotenoids suggest that the presented formulation is superior to former effective Hamiltonians. Furthermore, statistical analysis reveals that all the benefits of the previous DFT/MRCI Hamiltonians are retained. Consequently, the here presented formulation should be considered as the new standard for DFT/MRCI calculations.
Collapse
Affiliation(s)
- Dennis R Dombrowski
- Institute of Theoretical and Computational Chemistry, Heinrich-Heine-University Düsseldorf, 40225 Düsseldorf, Germany
| | - Timo Schulz
- Institute of Theoretical and Computational Chemistry, Heinrich-Heine-University Düsseldorf, 40225 Düsseldorf, Germany
| | - Martin Kleinschmidt
- Institute of Theoretical and Computational Chemistry, Heinrich-Heine-University Düsseldorf, 40225 Düsseldorf, Germany
| | - Christel M Marian
- Institute of Theoretical and Computational Chemistry, Heinrich-Heine-University Düsseldorf, 40225 Düsseldorf, Germany
| |
Collapse
|
167
|
Träbert E. EUV Beam–Foil Spectra of Germanium and a Blind-Spot Problem in Spectroscopy. Atoms 2023; 11:45. [DOI: 10.3390/atoms11030045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023] Open
Abstract
Beam–foil extreme-ultraviolet survey spectra of Ge (Z=32) are presented. The data have been garnered at the performance limit of the heavy-ion accelerator available, with a correspondingly limited statistical and calibrational reliability. However, the Ge spectra have been recorded at various delays after excitation, and this technique points to a possible blind spot in some other spectroscopic techniques, and thus in the literature coverage. A similarly patchy coverage can be noted in various atomic structure computations. The experimental and theoretical gaps seem to be correlated.
Collapse
|
168
|
Ghosh R, Datta S, Mora AK, Modak B, Nath S, Palit DK. Dynamics of hydrogen bond reorganization in the S1(ππ*) state of 9-Anthracenecarboxaldehyde. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2022.114379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
169
|
Zavitsas AA. Properties of water solutions. The effective molality. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
|
170
|
Schultes FPJ, Haarmann M, Tischler D, Mügge C. Primary alcohols as substrates or products in whole-cell biocatalysis: Toxicity for Escherichia coli expression strains. Molecular Catalysis 2023. [DOI: 10.1016/j.mcat.2023.112979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
|
171
|
Abstract
We present the first solid-state structural evidence of mono- and bis(pyridine)chloronium cations. The latter was synthesized from a mixture of pyridine, elemental chlorine and sodium tetrafluoroborate in propionitrile at low temperatures. The mono(pyridine) chloronium cation was realized with the less reactive pentafluoropyridine, using ClF, AsF5, and C5F5N in anhydrous HF. During the course of this study, we also investigated pyridine dichlorine adducts and found a surprising disproportionation reaction of chlorine that depended on the substitutional pattern of the pyridine. Electron richer dimethylpyridine (lutidine) derivatives favor full disproportionation into a positively and a negatively charged chlorine atom which forms a trichloride monoanion, while unsubstituted pyridine forms a 1 : 1 py·Cl2 adduct.
Collapse
Affiliation(s)
- Patrick Pröhm
- Department of Chemistry and Biochemistry, Freie Universität Berlin Fabeckstr. 34/36 14195 Berlin Germany
| | - Willi Berg
- Department of Chemistry and Biochemistry, Freie Universität Berlin Fabeckstr. 34/36 14195 Berlin Germany
| | - Susanne Margot Rupf
- Department of Chemistry and Biochemistry, Freie Universität Berlin Fabeckstr. 34/36 14195 Berlin Germany
| | - Carsten Müller
- Department of Chemistry and Biochemistry, Freie Universität Berlin Fabeckstr. 34/36 14195 Berlin Germany
| | - Sebastian Riedel
- Department of Chemistry and Biochemistry, Freie Universität Berlin Fabeckstr. 34/36 14195 Berlin Germany
| |
Collapse
|
172
|
Nguyen K, Nguyen V, Tran H, Pham P. Organo-photocatalytic C-H bond oxidation: an operationally simple and scalable method to prepare ketones with ambient air. RSC Adv 2023; 13:7168-7178. [PMID: 36891491 PMCID: PMC9986805 DOI: 10.1039/d3ra00332a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Accepted: 02/17/2023] [Indexed: 03/08/2023] Open
Abstract
Oxidative C-H functionalization with O2 is a sustainable strategy to convert feedstock-like chemicals into valuable products. Nevertheless, eco-friendly O2-utilizing chemical processes, which are scalable yet operationally simple, are challenging to develop. Here, we report our efforts, via organo-photocatalysis, in devising such protocols for catalytic C-H bond oxidation of alcohols and alkylbenzenes to ketones using ambient air as the oxidant. The protocols employed tetrabutylammonium anthraquinone-2-sulfonate as the organic photocatalyst which is readily available from a scalable ion exchange of inexpensive salts and is easy to separate from neutral organic products. Cobalt(ii) acetylacetonate was found to be greatly instrumental to oxidation of alcohols and therefore was included as an additive in evaluating the alcohol scope. The protocols employed a nontoxic solvent, could accommodate a variety of functional groups, and were readily scaled to 500 mmol scale in a simple batch setting using round-bottom flasks and ambient air. A preliminary mechanistic study of C-H bond oxidation of alcohols supported the validity of one possible mechanistic pathway, nested in a more complex network of potential pathways, in which the anthraquinone form - the oxidized form - of the photocatalyst activates alcohols and the anthrahydroquinone form - the relevant reduced form of the photocatalyst - activates O2. A detailed mechanism, which reflected such a pathway and was consistent with previously accepted mechanisms, was proposed to account for formation of ketones from aerobic C-H bond oxidation of both alcohols and alkylbenzenes.
Collapse
Affiliation(s)
- Ky Nguyen
- Faculty of Chemistry, University of Science, Vietnam National University Hanoi Vietnam
| | - Van Nguyen
- Faculty of Chemistry, University of Science, Vietnam National University Hanoi Vietnam
| | - Hieu Tran
- Faculty of Chemistry, University of Science, Vietnam National University Hanoi Vietnam
| | - Phong Pham
- Faculty of Chemistry, University of Science, Vietnam National University Hanoi Vietnam
| |
Collapse
|
173
|
Kai T, Toigawa T, Matsuya Y, Hirata Y, Tezuka T, Tsuchida H, Yokoya A. Initial yield of hydrated electron production from water radiolysis based on first-principles calculation. RSC Adv 2023; 13:7076-7086. [PMID: 36875880 PMCID: PMC9977407 DOI: 10.1039/d2ra07274b] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 02/16/2023] [Indexed: 03/05/2023] Open
Abstract
Many scientific insights into water radiolysis have been applied for developing life science, including radiation-induced phenomena, such as DNA damage and mutation induction or carcinogenesis. However, the generation mechanism of free radicals due to radiolysis remains to be fully understood. Consequently, we have encountered a crucial problem in that the initial yields connecting radiation physics to chemistry must be parameterized. We have been challenged in the development of a simulation tool that can unravel the initial free radical yields, from physical interaction by radiation. The presented code enables the first-principles calculation of low energy secondary electrons resulting from the ionization, in which the secondary electron dynamics are simulated while considering dominant collision and polarization effects in water. In this study, using this code, we predicted the yield ratio between ionization and electronic excitation from a delocalization distribution of secondary electrons. The simulation result presented a theoretical initial yield of hydrated electrons. In radiation physics, the initial yield predicted from parameter analysis of radiolysis experiments in radiation chemistry was successfully reproduced. Our simulation code helps realize a reasonable spatiotemporal connection from radiation physics to chemistry, which would contribute to providing new scientific insights for precise understanding of underlying mechanisms of DNA damage induction.
Collapse
Affiliation(s)
- Takeshi Kai
- Nuclear Science and Engineering Center, Japan Atomic Energy Agency 2-4 Shirane Shirakata, Tokai-mura, Naka-gun Ibaraki 319-1195 Japan
| | - Tomohiro Toigawa
- Nuclear Science and Engineering Center, Japan Atomic Energy Agency 2-4 Shirane Shirakata, Tokai-mura, Naka-gun Ibaraki 319-1195 Japan
| | - Yusuke Matsuya
- Nuclear Science and Engineering Center, Japan Atomic Energy Agency 2-4 Shirane Shirakata, Tokai-mura, Naka-gun Ibaraki 319-1195 Japan.,Faculty of Health Sciences, Hokkaido University Kita-12 Nishi-5, Kita-ku Sapporo Hokkaido 060-0812 Japan
| | - Yuho Hirata
- Nuclear Science and Engineering Center, Japan Atomic Energy Agency 2-4 Shirane Shirakata, Tokai-mura, Naka-gun Ibaraki 319-1195 Japan
| | - Tomoya Tezuka
- Department of Nuclear Engineering, Kyoto University Nishikyo-ku Kyoto 615-8530 Japan
| | - Hidetsugu Tsuchida
- Department of Nuclear Engineering, Kyoto University Nishikyo-ku Kyoto 615-8530 Japan.,Quantum Science and Engineering Center, Kyoto University Gokasho, Uji Kyoto 611-0011 Japan
| | - Akinari Yokoya
- Institute for Quantum Life Science, National Institutes for Quantum Science and Technology 2-4 Shirane Shirakata, Tokai-mura, Naka-gun Ibaraki 319-1195 Japan
| |
Collapse
|
174
|
Kumar H, Upendar S, Mani E, Madivala G Basavaraj. Destabilization of Pickering emulsions by interfacial transport of mutually soluble solute. J Colloid Interface Sci 2023; 633:166-76. [PMID: 36442288 DOI: 10.1016/j.jcis.2022.10.133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 10/21/2022] [Accepted: 10/26/2022] [Indexed: 11/19/2022]
Abstract
HYPOTHESIS Pickering emulsions (PEs) once formed are highly stable because of very high desorption energies (∼107 kBT) associated with particles adsorbed to the interfaces. The destabilization of PEs is required in many instances for recovery of valuable chemicals, products and active compounds. We propose to exploit interfacial instabilities develop by the addition of different types of solutes to PEs as a route to engineer their destabilization. EXPERIMENTS PEs stabilized by (i) spherical particles, (ii) non-spherical particles, (iii) oppositely charged particle-particle mixtures, and (iv) oppositely charged particle-polyelectrolyte mixtures are formulated. Different types of solutes are added to these highly stable PEs and the macroscopic as well as microscopic changes induced in the PEs is recorded by visual observation and bright field optical microscopy. FINDINGS Our results point to a simple yet robust method to induce destabilization of PEs by transiently perturbing the oil-water interface by transport of a mutually soluble solute across the interface. The generality of the method is demonstrated for different kind of solutes and stabilizers including particles of different sizes (nm to µm), shapes (sphere, spheroids, spherocylinders) and types (polystyrene, metal oxides). The method works for both oil-in-water (o/w) and water-in-oil (w/o) PEs with different kinds of non-polar solvents as oil-phase. However, the method fails when the solute is insoluble in one of the phases of PEs. The study opens up a new approach to destabilization of particle stabilized emulsions.
Collapse
|
175
|
Hoffmann A, Franz A, Walther T, Löser C. Utilization of delactosed whey permeate for the synthesis of ethyl acetate with Kluyveromyces marxianus. Appl Microbiol Biotechnol 2023; 107:1635-1648. [PMID: 36786916 PMCID: PMC10006051 DOI: 10.1007/s00253-023-12419-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2022] [Revised: 12/21/2022] [Accepted: 01/30/2023] [Indexed: 02/15/2023]
Abstract
Ethyl acetate is an important organic solvent and currently produced from fossil carbon resources. Microbial synthesis of this ester from sugar-rich waste could be an interesting alternative. Therefore, synthesis of ethyl acetate by Kluyveromyces marxinanus DSM 5422 from delactosed whey permeate (DWP) was studied in an aerated stirred bioreactor at 40 °C. DWP is mainly composed of residual lactose and minerals. The minerals inhibited yeast growth, as witnessed by an increased lag period, a reduced growth rate, and an extended process duration. All experiments were therefore carried out with diluted DWP. In a series of batch experiments, the pH of iron-deficient DWP medium varied between 4.8 and 5.9. The pH of the cultivation medium significantly influenced cell growth and product syntheses, with the highest ethyl acetate yield of 0.347 g g-1 and lowest by-product formation achieved at pH 5.1. It is likely that this effect is due to pH-dependent iron chelation, which affects the iron bioavailability and the intracellular iron content, thus affecting growth and metabolite synthesis. The viability of yeast cells was always high despite the harsh conditions in DWP medium, which enabled extended usage of the biomass in repeated-batch and fed-batch cultivations. These two culture techniques increased the volume of DWP processed per time by 32 and 84% for the repeated-batch and the fed-batch cultivation, respectively, without a drop of the ester yield. KEY POINTS: • Delactosed whey permeate was converted to ethyl acetate with a high rate and yield. • The formation of ethyl acetate in DWP medium at iron limitation is pH-dependent. • Highly active yeasts from batch processes enabled extension as fed and repeated batch.
Collapse
Affiliation(s)
- Andreas Hoffmann
- Bioprocess Engineering, Institute of Natural Materials Technology, Technische Universität Dresden, 01062, Dresden, Germany
| | - Alexander Franz
- Bioprocess Engineering, Institute of Natural Materials Technology, Technische Universität Dresden, 01062, Dresden, Germany
- Biophysical Chemistry, Institute of Biochemistry, University of Leipzig, 04103, Leipzig, Germany
| | - Thomas Walther
- Bioprocess Engineering, Institute of Natural Materials Technology, Technische Universität Dresden, 01062, Dresden, Germany
| | - Christian Löser
- Bioprocess Engineering, Institute of Natural Materials Technology, Technische Universität Dresden, 01062, Dresden, Germany.
| |
Collapse
|
176
|
Sendova M, Jiménez JA. Nanodiamond-promoted white light emission in Eu, Dy, and Cu-containing phosphate glass: quantitative analysis and colorimetric study. LUMINESCENCE 2023; 38:280-290. [PMID: 36693650 DOI: 10.1002/bio.4447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 01/16/2023] [Accepted: 01/17/2023] [Indexed: 01/26/2023]
Abstract
A thorough analysis of glass containing Eu2 O3 and Dy2 O3 , or Eu2 O3 , Dy2 O3 , and CuO melted together with nanodiamond powder was pursued based on measurements of optical absorption, photoluminescence (PL) emission and excitation spectra, and colorimetry. Nanodiamond facilitated the stabilization of Cu+ and Eu2+ ions with blue-emitting characteristics that, along with yellow-emitting Dy3+ and red-emitting Eu3+ led to the white light-emitting glass. Novel intensity notations implemented in intensity-based spectral ratios, and difference intensity correlation analysis were proposed for the assessment of PL properties. The chromaticity and correlated colour temperature of the emission were ultimately investigated as a two-parametric problem based on: (1) the different ionic components; and (2) the various excitation wavelengths employed. The optical analysis approach adds to the characterization methods to further fundamental understanding and provide helpful analytical tools for designing materials for tunable white light-emitting devices.
Collapse
Affiliation(s)
- Mariana Sendova
- Optical Spectroscopy & Nano-Materials Lab, New College of Florida, Sarasota, FL, USA
| | - José A Jiménez
- Department of Chemistry & Biochemistry, Georgia Southern University, Statesboro, GA, USA
| |
Collapse
|
177
|
Rohman R, Nath R, Kar R. Revisiting the Hydrogen Atom Transfer Reactions through a Simple and Accurate Theoretical Model: Role of Hydrogen Bond Energy in Polyphenolic Antioxidants. COMPUT THEOR CHEM 2023. [DOI: 10.1016/j.comptc.2023.114097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
|
178
|
Ka S, Jang H, Peebles SA, Peebles RA, Oh JJ. Microwave spectrum, structure, and dipole moment of 2-fluorophenylacetylene. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2023.135377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
|
179
|
Sen A, Follet H, Sornay-Rendu E, Rémond Y, George D. Prediction of osteoporotic degradation of tibia human bone at trabecular scale. J Mech Behav Biomed Mater 2023; 139:105650. [PMID: 36657191 DOI: 10.1016/j.jmbbm.2023.105650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Revised: 11/18/2022] [Accepted: 01/01/2023] [Indexed: 01/11/2023]
Abstract
A theoretical numerical model is proposed to predict patient dependent osteoporotic bone degradation. The model parameters are identified through a particle swarm optimization algorithm and based on individual patient high resolution peripherical quantitative computer tomography (HRpQCT) scan data. The degradation model is based on cellular activity initiated by the elastic strain energy developed in the bone microstructure through patient's body weight. The macro (organ scale) and meso (trabecular scale) scale analyses are carried out and predicted bone volume fraction and microstructure evolution are compared with in-vivo experimental bone degradation for four elderly women over a period of 10 years. A significant correlation (r > 0.9) is observed between the model predictions and in-vivo experiments in all cases with an average deviation error of 1.46%. The model can easily be extended to other patients and provide good predictions for different population categories such as ethnicity, gender, age, etc.
Collapse
Affiliation(s)
- Ahmet Sen
- University of Strasbourg, CNRS, ICUBE Laboratory, Strasbourg, France
| | - Hélène Follet
- University Claude Bernard Lyon 1, INSERM, LYOS UMR 1033, 69008, Lyon, France.
| | - Elisabeth Sornay-Rendu
- University Claude Bernard Lyon 1, INSERM, LYOS UMR 1033, 69008, Lyon, France; Edouard Heriot Hospital, Hospices Civils of Lyon, 69437, Lyon, France
| | - Yves Rémond
- University of Strasbourg, CNRS, ICUBE Laboratory, Strasbourg, France
| | - Daniel George
- University of Strasbourg, CNRS, ICUBE Laboratory, Strasbourg, France.
| |
Collapse
|
180
|
Puri D, Sihag P, Thakur M. A Review: Aeration Efficiency of Hydraulic Structures in Diffusing DO in Water. MethodsX 2023; 10:102092. [PMID: 37007614 PMCID: PMC10050780 DOI: 10.1016/j.mex.2023.102092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Accepted: 02/20/2023] [Indexed: 03/11/2023] Open
Abstract
This paper contemplates the review of aeration efficiency with commonly used different aeration systems such as Venturi flumes, Weirs, Conduits, Stepped channels, In Venturi Aeration, the SAE value grows fast with the number of air holes. In Weir Aeration, it was found that among all the different labyrinth weir structure, triangular notch weirs are known for the optimum results for air entrainment. The ANN model was developed with parameters discharge (Q) and tail water depth (Tw) which showed that Q is more influential parameter than Tw. In conduits structure, it was found that circular high head gated conduits have better aeration performance than other conduits. Aeration efficiency in Stepped channels cascades may range from 30% to 70%. The sensitivity analysis with ANN model showed that discharge (Q) followed by number of steps (N) was the most influential parameter in E20. Bubble size was the important parameter to undertake when using bubble diffuser. The oxygen transfer efficiency (OTE) in jet diffusers was predicted developing an ANN model. It was found in sensitivity analysis that the input of 'velocity' is highly sensitive to OTE. According to literature, jets can provide OTE in the range of 1.91- 21.53kgO2/kW-hr.
Collapse
Affiliation(s)
- Diksha Puri
- School of Environmental Sciences, Shoolini University, Solan, Himachal Pradesh 173229, India
| | - Parveen Sihag
- Department of Civil Engineering, Chandigarh University, Punjab 140301, India
- Corresponding author.
| | - M.S. Thakur
- Professor, Department of Civil Engineering, Shoolini University, Solan, Himachal Pradesh 173229, India
| |
Collapse
|
181
|
Sajadian SA, Peyrovedin H, Zomorodian K, Khorram M. Using the supercritical carbon dioxide as the solvent of Nystatin: Studying the effect of co-solvent, experimental and correlating. J Supercrit Fluids 2023; 194:105858. [DOI: 10.1016/j.supflu.2023.105858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
|
182
|
Azum N, Y. M. Alfaifi S, Abdul Rub M, Asiri AM. Effects of ionic liquid on micellar aggregate formed by pluronic (F-127) and non-ionic surfactant (TX-100) in aqueous solution. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121617] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
|
183
|
Vielma T, Hnedkovsky L, Hefter G. Measurement and Prediction of Molar Volumes of Bivalent Metal Sulfates and Their Mixtures in Aqueous Solution. J SOLUTION CHEM 2023. [DOI: 10.1007/s10953-023-01252-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2023]
Abstract
AbstractDensities of aqueous solutions of MnSO$$_4$$
4
, CoSO$$_4$$
4
, NiSO$$_4$$
4
and CuSO$$_4$$
4
have been measured by vibrating tube densimetry up to near-saturation concentrations over the temperature range 293.15 $$\le T/$$
≤
T
/
K $$\le $$
≤
343.15 at 5 K intervals and at 0.1 MPa pressure. Apparent molar volumes, $$V_\phi $$
V
ϕ
, calculated from the densities revealed close similarities among all four electrolytes, with their $$V_\phi $$
V
ϕ
values essentially differing by constant concentration-independent addends for each salt at each temperature. It was found that there is an almost linear relationship between $$V_\phi $$
V
ϕ
(MSO$$_4$$
4
,aq) and the M–O bond length of the hydrated cations obtained from structural studies. This relationship can be used to predict values of $$V_\phi $$
V
ϕ
(MSO$$_4$$
4
,aq) for other sulfate salts over wide ranges of concentration and temperature, providing that the requisite structural data are available. Measurements of selected ternary, quaternary and quinary mixtures of these electrolytes at constant total concentrations showed that their $$V_\phi $$
V
ϕ
values almost always exhibit linear mixing (Young’s rule) behavior at all temperatures investigated. This finding can be exploited to predict the volumetric properties of solutions containing complex mixtures of bivalent metal sulfates.
Collapse
|
184
|
Mó O, Alkorta I, Guillemin J, Yáñez M. Dramatic effect of the nature of R on the intrinsic acidity and basicity of potential astrochemical R–C≡COH and R–C≡CSH compounds. Theor Chem Acc 2023; 142:28. [DOI: 10.1007/s00214-023-02967-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Abstract
AbstractThe effect of changing the nature of the R substituent from the first row (H, Li, BeH, BH2, CH3, NH2, OH and F) to second row (Na, MgH, AlH2, SiH3, PH2, SH and Cl) on the intrinsic acidity and basicity of R–C≡COH and R–C≡CSH compounds was investigated through the use of G4 high-level ab initio calculation. The variation of the acidity and basicity of the R–C≡CSH derivatives as a function of R is practically parallel to that found for the corresponding R–C≡COH analogs; though the basicities of the former are 9–14% higher than those of the latter, the acidity gap being very small (~ 2%). When this analysis is extended to the derivatives in which the triple CC bond is replaced by a double or single bond, it is found that the acidity gap increases systematically as the CC bond goes from triple to single; whereas, as expected for the basicity, the trend is the opposite. Quite surprisingly, however, the variation of the basicity of R–C≡CX (X = OH, SH) compounds with the nature of the first-row substituents, R, is remarkably different from that produced by the second-row analogs. The same is observed as far as intrinsic acidities are concerned. These dissimilarities reflect the rather different changes in the strength of the CC and the CX (X = OH, SH) bonds when a first-row substituent is replaced by the second-row analog, as reflected in the atoms in molecules (AIM), natural bond orbital (NBO) and the electron localization function (ELF) analyses of the corresponding species.
Collapse
|
185
|
Qi D, Zhang C, Wu Z, Shen C, Yue Y, Ren L, Yang L. Dynamics and hydrodynamic efficiency of diving beetle while swimming. Heliyon 2023; 9:e14200. [PMID: 36923826 PMCID: PMC10009088 DOI: 10.1016/j.heliyon.2023.e14200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 02/20/2023] [Accepted: 02/23/2023] [Indexed: 03/05/2023] Open
Abstract
Diving beetle, an excellent biological prototype for bionic underwater vehicles, can achieve forward swimming, backward swimming, and flexible cornering by swinging its two powerful hind legs. An in-depth study of the propulsion performance of them will contribute to the micro underwater vehicles. In this paper, the kinematic and dynamic parameters, and the hydrodynamic efficiency of the diving beetle are studied by analysis of swimming videos using Motion Capture Technology, combined with CFD simulations. The results show that the hind legs of diving beetle can achieve high propulsion force and low return resistance during one propulsion cycle at both forward and backward swimming modes. The propulsion efficiencies of forward and backward swimming are 0.47 and 0.30, respectively. Although the efficiency of backward swimming is lower, the diving beetle can reach a higher speed in a short time at this mode, which can help it avoid natural enemies. At backward swimming mode, there is a long period of passive swing of hind legs, larger drag exists at higher speed during the recovery stroke, which reduces the propulsion efficiency to a certain extent. Reasonable planning of the swing speed of the hind legs during the power stroke and the recovery stroke can obtain the highest propulsion efficiency of this propulsion method. This work will be useful for the development of a bionic propulsion system of micro underwater vehicle.
Collapse
Affiliation(s)
- Debo Qi
- Key Laboratory of Bionic Engineering (Ministry of Education), Jilin University, Changchun, 130025, China
| | - Chengchun Zhang
- Key Laboratory of Bionic Engineering (Ministry of Education), Jilin University, Changchun, 130025, China.,Weihai Institute for Bionics, Jilin University, Weihai, 264402, China.,State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun, 130025, China
| | - Zhengyang Wu
- Key Laboratory of Bionic Engineering (Ministry of Education), Jilin University, Changchun, 130025, China.,Weihai Institute for Bionics, Jilin University, Weihai, 264402, China
| | - Chun Shen
- Key Laboratory of Bionic Engineering (Ministry of Education), Jilin University, Changchun, 130025, China.,State Key Laboratory of Automotive Simulation and Control, Jilin University, Changchun, 130025, China
| | - Yongli Yue
- Key Laboratory of Bionic Engineering (Ministry of Education), Jilin University, Changchun, 130025, China
| | - Luquan Ren
- Key Laboratory of Bionic Engineering (Ministry of Education), Jilin University, Changchun, 130025, China
| | - Liang Yang
- Lecturer in Marine Renewable Energy System, Cranfield University, Cranfield, MK43 0AL, UK
| |
Collapse
|
186
|
Zettl M, Winter C, Mantanus J, Hadjittofis E, Rome S, Leitinger G, Hsiao WK, Roblegg E, Pinto JT, Spoerk M. Needles to Spheres: Evaluation of inkjet printing as a particle shape enhancement tool. Eur J Pharm Biopharm 2023; 184:92-102. [PMID: 36707008 DOI: 10.1016/j.ejpb.2023.01.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 01/20/2023] [Accepted: 01/21/2023] [Indexed: 01/26/2023]
Abstract
Active pharmaceutical ingredients (APIs) often reveal shapes challenging to process, e.g. acicular structures, and exhibit reduced bioavailability induced by slow dissolution rate. Leveraging the API particles' surface and bulk properties offers an attractive pathway to circumvent these challenges. Inkjet printing is an attractive processing technique able to tackle these limitations already in initial stages when little material is available, while particle properties are maintained over the entire production scale. Additionally, it is applicable to a wide range of formulations and offers the possibility of co-processing with a variety of excipients to improve the API's bioavailability. This study addresses the optimization of particle shapes for processability enhancement and demonstrates the successful application of inkjet printing to engineer spherical lacosamide particles, which are usually highly acicular. By optimizing the ink formulation, adapting the substrate-liquid interface and tailoring the heat transfer to the particle, spherical particles in the vicinity of 100 µm, with improved flow properties compared to the bulk material, were produced. Furthermore, the particle size was tailored reproducibly by adjusting the deposited ink volume per cycle and the number of printing cycles. Therefore, the present study shows a novel, reliable, scalable and economical strategy to overcome challenging particle morphologies by co-processing an API with suitable excipients.
Collapse
|
187
|
Li P, Zhang W, Wang Y, Tian J, Shi D, Xu H. A near-infrared and lysosome-targeted coumarin-BODIPY photosensitizer for photodynamic therapy against HepG2 cells. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2023.114735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
|
188
|
Jer Ng W, Jin Ryu H. Effects of Base Salt Additives on NaCl–UCl3–PuCl3 Fuel Systems: Insights from CALPHAD Simulations. J Mol Liq 2023. [DOI: 10.1016/j.molliq.2023.121649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
|
189
|
Osiewacz J, Löffelholz M, Weseler L, Turek T. CO poisoning of silver gas diffusion electrodes in electrochemical CO2 reduction. Electrochim Acta 2023. [DOI: 10.1016/j.electacta.2023.142046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
|
190
|
Shen T, Sakairi M. Elucidation of electrochemical and morphological difference of carbon steel corroded in aqueous chloride solutions at low temperatures. Electrochim Acta 2023. [DOI: 10.1016/j.electacta.2023.142220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2023]
|
191
|
Sulaiman M, Rabbani FA, Iqbal T, Kazmi MA, Yasin S, Mujtaba M, Kalam M, Almomani F. Impact of eco-friendly chemical pretreatment on physicochemical and surface mechanical properties of sustainable lignocellulosic agricultural waste. ALGAL RES 2023. [DOI: 10.1016/j.algal.2023.103051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/13/2023]
|
192
|
Lin Y, zhang Q, Lou Y, Liu G, Li S, Chen L, Yuan B, Zou D, Chen J. Efficient degradation of Nizatidine by a Fe(II)/ persulfate system actived with Zero-valent iron. Chem Eng Res Des 2023. [DOI: 10.1016/j.cherd.2023.03.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
|
193
|
Sizykh M, Batoeva A, Matafonova G. Enhanced catalyst-free degradation and mineralization of ceftriaxone by UV/H2O2 and UV/S2O82− processes using KrCl excilamp (222 nm). J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2022.114357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
194
|
Rodgers TFM, Giang A, Diamond ML, Gillies E, Saini A. Emissions and fate of organophosphate esters in outdoor urban environments. Nat Commun 2023; 14:1175. [PMID: 36859357 DOI: 10.1038/s41467-023-36455-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Accepted: 01/30/2023] [Indexed: 03/03/2023] Open
Abstract
Cities are drivers of the global economy, containing products and industries that emit many chemicals. Here, we use the Multimedia Urban Model (MUM) to estimate atmospheric emissions and fate of organophosphate esters (OPEs) from 19 global mega or major cities, finding that they collectively emitted ~81,000 kg yr-1 of ∑10OPEs in 2018. Typically, polar "mobile" compounds tend to partition to and be advected by water, while non-polar "bioaccumulative" chemicals do not. Depending on the built environment and climate of the city considered, the same compound behaves like either a mobile or a bioaccumulative chemical. Cities with large impervious surface areas, such as Kolkata, mobilize even bioaccumulative contaminants to aquatic ecosystems. By contrast, cities with large areas of vegetation fix and transform contaminants, reducing loadings to aquatic ecosystems. Our results therefore suggest that urban design choices could support policies aimed at reducing chemical releases to the broader environment without increasing exposure for urban residents.
Collapse
|
195
|
Fang X, Yang X, Wang H. The transition metal doped B cluster (TM4B18) as catalysis for nitrogen fixation. Molecular Catalysis 2023. [DOI: 10.1016/j.mcat.2023.113031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/04/2023]
|
196
|
Münch M, Guillard V, Gaucel S, Destercke S, Thévenot J, Buche P. Composition-based statistical model for predicting CO2 solubility in modified atmosphere packaging application. J FOOD ENG 2023. [DOI: 10.1016/j.jfoodeng.2022.111283] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
197
|
Biswas S, Antonov I, Fujioka K, Rizzo GL, Chambreau SD, Schneider S, Sun R, Kaiser RI. Unraveling the initial steps of the ignition chemistry of the hypergolic ionic liquid 1-ethyl-3-methylimidazolium cyanoborohydride ([EMIM][CBH]) with nitric acid (HNO 3) exploiting chirped pulse triggered droplet merging. Phys Chem Chem Phys 2023; 25:6602-6625. [PMID: 36806836 DOI: 10.1039/d2cp05943f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
The composition of the products and the mechanistic routes for the reaction of the hypergolic ionic liquid (HIL) 1-ethyl-3-methylimidazolium cyanoborohydride ([EMIM][CBH]) and nitric acid (HNO3) at various concentrations from 10% to 70% were explored using a contactless single droplet merging within an ultrasonic levitation setup in an inert atmosphere of argon to reveal the initial steps that cause hypergolicity. The reactions were initiated through controlled droplet-merging manipulation triggered by a frequency chirp pulse amplitude modulation. Utilizing the high-speed optical and infrared cameras surrounding the levitation process chamber, intriguing visual images were unveiled: (i) extensive gas release and (ii) temperature rises of up to 435 K in the merged droplets. The gas development was validated qualitatively and quantitatively with Fourier Transform Infrared Spectroscopy (FTIR) indicating the major gas-phase products to be hydrogen cyanide (HCN) and nitrous oxide (N2O). The merged droplet was also probed by pulsed Raman spectroscopy which deciphered features for key functional groups of the reaction products and intermediates (-BH, -BH2, -BH3, -NCO); reaction kinetics revealed that the reaction was initiated by the interaction of the [CBH]- anion of the HIL with the oxidizer (HNO3) through proton transfer. Computations indicate the formation of a van-der-Waals complex between the [CBH]- anion and HNO3 initially, followed by proton transfer from the acid to the anion and subsequent extensive isomerization; these rearrangements were found to be essential for the formation of HCN and N2O. The exoergicity observed during the merging process provides a molar enthalpy change up to 10 kJ mol-1 to the system, which could be sufficient for a significant fraction of the reactants of about 11% to overcome the reaction barriers in the individual steps of the computationally determined minimum energy pathways.
Collapse
Affiliation(s)
- Souvick Biswas
- Department of Chemistry, University of Hawai'i at Manoa, Honolulu, Hawaii 96822, USA.
| | - Ivan Antonov
- Department of Chemistry, University of Hawai'i at Manoa, Honolulu, Hawaii 96822, USA.
| | - Kazuumi Fujioka
- Department of Chemistry, University of Hawai'i at Manoa, Honolulu, Hawaii 96822, USA.
| | - Grace L Rizzo
- Department of Chemistry, University of Hawai'i at Manoa, Honolulu, Hawaii 96822, USA.
| | | | - Stefan Schneider
- Air Force Research Laboratory, Edwards Air Force Base, California 93524, USA
| | - Rui Sun
- Department of Chemistry, University of Hawai'i at Manoa, Honolulu, Hawaii 96822, USA.
| | - Ralf I Kaiser
- Department of Chemistry, University of Hawai'i at Manoa, Honolulu, Hawaii 96822, USA.
| |
Collapse
|
198
|
Yeh SL, Koshani R, Sheikhi A. Colloidal aspects of calcium carbonate scaling in water-in-oil emulsions: A fundamental study using droplet-based microfluidics. J Colloid Interface Sci 2023; 633:536-545. [PMID: 36463822 DOI: 10.1016/j.jcis.2022.11.066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 11/08/2022] [Accepted: 11/12/2022] [Indexed: 11/18/2022]
Abstract
HYPOTHESIS As a mainstream process in the extraction and recovery of crude oil, water is injected into reservoirs in the so-called waterflooding process to facilitate the oil displacement through the wellbore, typically generating water-in-oil (W/O) emulsions. Based on economic considerations, sea water is used in the flooding process; however, the ionic incompatibility between the injected water and the formation water inside the reservoir may precipitate sparingly-soluble inorganic salts (scale). We hypothesize that calcium carbonate (CaCO3) scale dynamically interacts with cationic surfactants in W/O emulsions, resulting in (i) scale growth retardation and (ii) emulsion destabilization. EXPERIMENTS We developed stable W/O emulsions via combining droplet-based microfluidics with multifactorial optimizations to investigate the influence of emulsion properties, such as surfactant type and concentrations, temperature, and pH, as well as calcium ions on the CaCO3 scaling kinetics and emulsion stability. The CaCO3 scale was characterized based on particle size and charge, lattice structure, interactions with the surfactant, and time-dependent effects on emulsion stability. FINDINGS The interfacial interactions between the cationic surfactant (cetyltrimethylammonium bromide, CTAB) and CaCO3 retarded scale growth rate, decreased crystal size, and destabilized emulsion within hours as a result of surfactant depletion at the water-oil interface. The surfactant did not affect the crystal structure of scale, which was formed as the most thermodynamically stable crystalline polymorph, calcite, at the ambient condition. This fundamental study may open new opportunities for engineering stable W/O emulsions, e.g., for enhanced oil recovery (EOR), and developing scale-resistant multiphase flows.
Collapse
Affiliation(s)
- Shang-Lin Yeh
- Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
| | - Roya Koshani
- Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16802, USA
| | - Amir Sheikhi
- Department of Chemical Engineering, The Pennsylvania State University, University Park, PA 16802, USA; Department of Biomedical Engineering, The Pennsylvania State University, University Park, PA 16802, USA.
| |
Collapse
|
199
|
Bui A, Bekerat H, Childress L, Sankey J, Seuntjens J, Enger SA. Effects of incoming particle energy and cluster size on the G-value of hydrated electrons. Phys Med 2023; 107:102540. [PMID: 36804695 DOI: 10.1016/j.ejmp.2023.102540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 01/29/2023] [Accepted: 02/01/2023] [Indexed: 02/18/2023] Open
Abstract
In hydrated electron (e-aq) dosimetry, absorbed radiation dose to water is measured by monitoring the concentration of radiation-induced e-aq. However, to obtain accurate dose, the radiation chemical yield of e-aq, G(e-aq), is needed for the radiation quality/setup under investigation. The aim of this study was to investigate the time-evolution of the G-values for the main generated reactive species during water radiolysis using GEANT4-DNA. The effects of cluster size and linear energy transfer (LET) on G(e-aq) were examined. Validity of GEANT4-DNA for calculation of G(e-aq) for clinically relevant energies was studied. Three scenarios were investigated with different phantom sizes and incoming electron energies (1 keV to 1 MeV). The time evolution of G(e-aq) was in good agreement with published data and did not change with decreasing phantom size. The time-evolution of the G-values increases with increasing LET for all radiolytic species. The particle tracks formed with high-energy electrons are separated and the resulting reactive species develop independently in time. With decreasing energy, the mean separation distance between reactive species decreases. The particle tracks might not initially overlap but will overlap shortly thereafter due to diffusion of reactive species, increasing the probability of e-aq recombination with other species. This also explains the decrease of G(e-aq) with cluster size and LET. Finally, if all factors are kept constant, as the incoming electron energy increases to clinically relevant energies, G(e-aq) remains similar to its value at 1 MeV, hence GEANT4-DNA can be used for clinically relevant energies.
Collapse
Affiliation(s)
- Alaina Bui
- Medical Physics Unit, Department of Oncology, Faculty of Medicine, McGill University, Montréal, Quebec, Canada.
| | - Hamed Bekerat
- Medical Physics Unit, Department of Oncology, Faculty of Medicine, McGill University, Montréal, Quebec, Canada; Radiation Oncology Department, Jewish General Hospital, Montréal, Quebec, Canada
| | - Lilian Childress
- Department of Physics, McGill University, Montréal, Quebec, Canada
| | - Jack Sankey
- Department of Physics, McGill University, Montréal, Quebec, Canada
| | - Jan Seuntjens
- Medical Physics Unit, Department of Oncology, Faculty of Medicine, McGill University, Montréal, Quebec, Canada; Research Institute of the McGill University Health Centre, Montréal, Quebec, Canada
| | - Shirin A Enger
- Medical Physics Unit, Department of Oncology, Faculty of Medicine, McGill University, Montréal, Quebec, Canada; Research Institute of the McGill University Health Centre, Montréal, Quebec, Canada; Lady Davis Institute for Medical Research, Jewish General Hospital, Montréal, Quebec, Canada
| |
Collapse
|
200
|
Rayinuthala Y, M DR, Srinivasa Reddy M, Sk Md N, Sk Md RA. Investigations on molecular interactions of memantine hydrochloride in aqueous solutions by thermophysical methods and molecular dynamics simulations at different temperatures. J INDIAN CHEM SOC 2023. [DOI: 10.1016/j.jics.2023.100967] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
|