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Jiang Q, Ji Y, Zheng T, Li X, Xia C. The Nexus of Innovation: Electrochemically Synthesizing H 2O 2 and Its Integration with Downstream Reactions. ACS MATERIALS AU 2024; 4:133-147. [PMID: 38496047 PMCID: PMC10941294 DOI: 10.1021/acsmaterialsau.3c00070] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 11/04/2023] [Accepted: 11/13/2023] [Indexed: 03/19/2024]
Abstract
Hydrogen peroxide (H2O2) represents a chemically significant oxidant that is prized for its diverse applicability across various industrial domains. Recent innovations have shed light on the electrosynthesis of H2O2 through two-electron oxygen reduction reactions (2e- ORR) or two-electron water oxidation reactions (2e- WOR), processes that underscore the attractive possibility for the on-site production of this indispensable oxidizing agent. However, the translation of these methods into practical utilization within chemical manufacturing industries remains an aspiration rather than a realized goal. This Perspective intends to furnish a comprehensive overview of the latest advancements in the domain of coupled chemical reactions with H2O2, critically examining emergent strategies that may pave the way for the development of new reaction pathways. These pathways could enable applications that hinge on the availability and reactivity of H2O2, including, but not limited to the chemical synthesis coupled with H2O2 and waste water treatment byFenton-like reactions. Concurrently, the Perspective acknowledges and elucidates some of the salient challenges and opportunities inherent in the coupling of electrochemically generated H2O2, thereby providing a scholarly analysis that might guide future research.
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Affiliation(s)
- Qiu Jiang
- School
of Materials and Energy, University of Electronic
Science and Technology of China, Chengdu 611731, People’s Republic of China
- Yangtze
Delta Region Institute (Huzhou), University
of Electronic Science and Technology of China, Huzhou, Zhejiang 313001, People’s
Republic of China
| | - Yuan Ji
- School
of Materials and Energy, University of Electronic
Science and Technology of China, Chengdu 611731, People’s Republic of China
| | - Tingting Zheng
- School
of Materials and Energy, University of Electronic
Science and Technology of China, Chengdu 611731, People’s Republic of China
| | - Xu Li
- School
of Materials and Energy, University of Electronic
Science and Technology of China, Chengdu 611731, People’s Republic of China
| | - Chuan Xia
- School
of Materials and Energy, University of Electronic
Science and Technology of China, Chengdu 611731, People’s Republic of China
- Yangtze
Delta Region Institute (Huzhou), University
of Electronic Science and Technology of China, Huzhou, Zhejiang 313001, People’s
Republic of China
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A QCT View of the Interplay between Hydrogen Bonds and Aromaticity in Small CHON Derivatives. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27186039. [PMID: 36144774 PMCID: PMC9504421 DOI: 10.3390/molecules27186039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/06/2022] [Revised: 09/07/2022] [Accepted: 09/13/2022] [Indexed: 11/18/2022]
Abstract
The somewhat elusive concept of aromaticity plays an undeniable role in the chemical narrative, often being considered the principal cause of the unusual properties and stability exhibited by certain π skeletons. More recently, the concept of aromaticity has also been utilised to explain the modulation of the strength of non-covalent interactions (NCIs), such as hydrogen bonding (HB), paving the way towards the in silico prediction and design of tailor-made interacting systems. In this work, we try to shed light on this area by exploiting real space techniques, such as the Quantum Theory of Atoms in Molecules (QTAIM), the Interacting Quantum Atoms (IQA) approaches along with the electron delocalisation indicators Aromatic Fluctuation (FLU) and Multicenter (MCI) indices. The QTAIM and IQA methods have been proven capable of providing an unbiased and rigorous picture of NCIs in a wide variety of scenarios, whereas the FLU and MCI descriptors have been successfully exploited in the study of diverse aromatic and antiaromatic systems. We used a collection of simple archetypal examples of aromatic, non-aromatic and antiaromatic moieties within organic molecules to examine the changes in π delocalisation and aromaticity induced by the Aromaticity and Antiaromaticity Modulated Hydrogen Bonds (AMHB). We observed fundamental differences in the behaviour of systems containing the HB acceptor within and outside the ring, e.g., a destabilisation of the rings in the former as opposed to a stabilisation of the latter upon the formation of the corresponding molecular clusters. The results of this work provide a physically sound basis to rationalise the strengthening and weakening of AMHBs with respect to suitable non-cyclic non-aromatic references. We also found significant differences in the chemical bonding scenarios of aromatic and antiaromatic systems in the formation of AMHB. Altogether, our investigation provide novel, valuable insights about the complex mutual influence between hydrogen bonds and π systems.
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Sauza-de la Vega A, Salazar-Lozas H, Vallejo Narváez WE, Hernández-Rodríguez M, Rocha-Rinza T. Water clusters as bifunctional catalysts in organic chemistry: the hydrolysis of oxirane and its methyl derivatives. Org Biomol Chem 2021; 19:6776-6780. [PMID: 34296728 DOI: 10.1039/d1ob01026c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This contribution explores the bifunctional catalytic activity of water clusters ((H2O)n with n = 1-5) in organic chemistry similar to that observed in the formation of H2SO4 in acid rain (Chem. Commun., 53, 3516, (2017)). We considered for this purpose the Hydrolysis of Epoxides (HE), in particular, that of oxirane and its methyl derivatives. Surrounding water molecules with H-bond cooperative effects decrease the activation energy of the rate-limiting step of HE in condensed phase, especially when they lead to an anti-periplanar attack on the alkoxide leaving group. Furthermore, the water molecules have a bifunctional catalytic role in HE by (i) increasing the nucleophilic and electrophilic character of the attacking oxygen atom and the leaving group of the reaction, respectively, and (ii) placing the reactants in a suitable disposition for the substitution to occur. Overall, this investigation provides relevant insights into the collective action of water molecules on organic reactions in neutral, basic and acid media.
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Affiliation(s)
- Arturo Sauza-de la Vega
- Universidad Nacional Autónoma de México, Instituto de Química, Ciudad Universitaria, Ciudad de México, 04510, Mexico.
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Guevara-Vela JM, Gallegos M, Valentín-Rodríguez MA, Costales A, Rocha-Rinza T, Pendás ÁM. On the Relationship between Hydrogen Bond Strength and the Formation Energy in Resonance-Assisted Hydrogen Bonds. Molecules 2021; 26:4196. [PMID: 34299473 PMCID: PMC8303970 DOI: 10.3390/molecules26144196] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 07/02/2021] [Accepted: 07/07/2021] [Indexed: 11/16/2022] Open
Abstract
Resonance-assisted hydrogen bonds (RAHB) are intramolecular contacts that are characterised by being particularly energetic. This fact is often attributed to the delocalisation of π electrons in the system. In the present article, we assess this thesis via the examination of the effect of electron-withdrawing and electron-donating groups, namely -F, -Cl, -Br, -CF3, -N(CH3)2, -OCH3, -NHCOCH3 on the strength of the RAHB in malondialdehyde by using the Quantum Theory of Atoms in Molecules (QTAIM) and the Interacting Quantum Atoms (IQA) analyses. We show that the influence of the investigated substituents on the strength of the investigated RAHBs depends largely on its position within the π skeleton. We also examine the relationship between the formation energy of the RAHB and the hydrogen bond interaction energy as defined by the IQA method of wave function analysis. We demonstrate that these substituents can have different effects on the formation and interaction energies, casting doubts regarding the use of different parameters as indicators of the RAHB formation energies. Finally, we also demonstrate how the energy density can offer an estimation of the IQA interaction energy, and therefore of the HB strength, at a reduced computational cost for these important interactions. We expected that the results reported herein will provide a valuable understanding in the assessment of the energetics of RAHB and other intramolecular interactions.
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Affiliation(s)
- José Manuel Guevara-Vela
- Institute of Chemistry, National Autonomous University of Mexico, Circuito Exterior, Ciudad Universitaria, Delegación Coyoacán, Mexico City C.P. 04510, Mexico; (J.M.G.-V.); (T.R.-R.)
| | - Miguel Gallegos
- Department of Analytical and Physical Chemistry, University of Oviedo, 33006 Oviedo, Spain; (M.G.); (A.C.)
| | - Mónica A. Valentín-Rodríguez
- Instituto de Física Fundamental, Consejo Superior de Investigaciones Científicas (IFF-CSIC), Serrano 123, 28006 Madrid, Spain;
| | - Aurora Costales
- Department of Analytical and Physical Chemistry, University of Oviedo, 33006 Oviedo, Spain; (M.G.); (A.C.)
| | - Tomás Rocha-Rinza
- Institute of Chemistry, National Autonomous University of Mexico, Circuito Exterior, Ciudad Universitaria, Delegación Coyoacán, Mexico City C.P. 04510, Mexico; (J.M.G.-V.); (T.R.-R.)
| | - Ángel Martín Pendás
- Department of Analytical and Physical Chemistry, University of Oviedo, 33006 Oviedo, Spain; (M.G.); (A.C.)
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Levina EO, Khrenova MG, Astakhov AA, Tsirelson VG. Revealing electronic features governing hydrolysis of cephalosporins in the active site of the L1 metallo-β-lactamase. RSC Adv 2020; 10:8664-8676. [PMID: 35496524 PMCID: PMC9050041 DOI: 10.1039/c9ra10649a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Accepted: 02/14/2020] [Indexed: 11/21/2022] Open
Abstract
The QM/MM simulations followed by electron density feature analysis are carried out to deepen the understanding of the reaction mechanism of cephalosporin hydrolysis in the active site of the L1 metallo-β-lactamase. The differences in reactivity of ten similar cephalosporin compounds are explained by using an extended set of bonding descriptors. The limiting step of the reaction is characterized by the proton transfer to the nitrogen atom of the cephalosporin thiazine ring accompanied with formation of the C4
Created by potrace 1.16, written by Peter Selinger 2001-2019
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C3 double bond in its N–C4–C3 fragment. The temporary N⋯H–Ow hydrogen bond, which is formed in the transition state of the limiting step of the reaction was recognized as a key atomic interaction governing the reactivity of various cephalosporins. Non-local real-space bonding descriptors show that different extent of localization of electron lone pair at N atom in the transition state affect the reactivity of compounds: smaller electron localization is typical for the less reactive species. In particular, the Fermi hole analysis shows how exchange electron correlation in the N⋯H–Ow fragment control electron lone pair localization. Delocalization tensor, linear response kernel and source function indicate that features of electron delocalization in the N–C4–C3 fragment of cephalosporins in the transition state complexes determine the differences in C4–C3 bond for substrates with high and low rate constants. The C4–C3 bond of the N–C4–C3 fragment at the transition state is similar to that of the preceding intermediate for the less reactive species and resembles the features of the enzyme–product complex for more reactive compounds. The power and limitations of the descriptors applied for solving the problem are discussed and the generality of approach is stressed. Combination of QM/MM and modern bonding descriptors explains different reactivity of cephalosporins in the active site of the L1 metallo-β-lactamase.![]()
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Affiliation(s)
- Elena O. Levina
- Federal Research Centre “Fundamentals of Biotechnology” of the Russian Academy of Sciences
- Moscow
- Russia
- Moscow Institute of Physics and Technology
- Dolgoprudny
| | - Maria G. Khrenova
- Federal Research Centre “Fundamentals of Biotechnology” of the Russian Academy of Sciences
- Moscow
- Russia
- Lomonosov Moscow State University
- Moscow
| | - Andrey A. Astakhov
- Federal Research Centre “Fundamentals of Biotechnology” of the Russian Academy of Sciences
- Moscow
- Russia
- Joint Institute for Nuclear Research
- Dubna
| | - Vladimir G. Tsirelson
- Federal Research Centre “Fundamentals of Biotechnology” of the Russian Academy of Sciences
- Moscow
- Russia
- Mendeleev University of Chemical Technology of Russia
- Moscow
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Design, synthesis, and antibacterial evaluation of novel derivatives of NPS-2143 for the treatment of methicillin-resistant S. aureus (MRSA) infection. J Antibiot (Tokyo) 2019; 72:545-554. [PMID: 30940910 DOI: 10.1038/s41429-019-0177-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2018] [Revised: 02/19/2019] [Accepted: 03/04/2019] [Indexed: 02/05/2023]
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) infections are a significant global health challenge due to the emergence of strains exhibiting resistance to nearly all classes of antibiotics. This necessitates the rapid development of novel antimicrobials to circumvent this critical problem. Screening of compounds based on phenotypes is one of the major strategies for finding new antibiotics at present. Hence, we here performed a phenotypic screening against MRSA and identified NPS-2143 exhibiting activity against MRSA with an MIC value of 16 μg ml-1. In order to discover more potent anti-MRSA agents, a series of derivatives of NPS-2143 were designed and synthesized. The most promising compounds 48 and 49 exhibited favorable antimicrobial activity with an MIC value of 2 μg ml-1.
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Teixeira F, Cordeiro MNDS. Improving Vibrational Mode Interpretation Using Bayesian Regression. J Chem Theory Comput 2019; 15:456-470. [PMID: 30525596 DOI: 10.1021/acs.jctc.8b00439] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
To streamline the interpretation of vibrational spectra, this work introduces the use of Bayesian linear regression with automatic relevance determination as a viable approach to decompose the atomic motions along any vibrational mode as a weighted combination of displacements along chemically meaningful internal coordinates. This novel approach denominated vibrational mode automatic relevance determination (VMARD) is presented and compared with the well-established potential energy decomposition (PED) scheme. Good agreement is generally attained between the two methods. VMARD returns a decomposition of the atomic displacement using only a small number of internal coordinates, thus aiding the interpretation of the vibrational spectra. Moreover, the results show that the VMARD descriptions are resilient toward the addition of additional internal coordinates, achieving a concise description of the vibrational modes despite the use of redundant internal coordinates. Potential applications of VMARD involving the gathering of physical insights on the atomic motions along the reaction coordinate at transition state structures, as well as the improvement of theoretically predicted vibrational frequencies, are also presented under a proof-of-concept perspective.
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Affiliation(s)
- Filipe Teixeira
- LAQV-REQUIMTE , Faculty of Sciences of the University of Porto , Rua do Campo Alegre , 4169-007 Porto , Portugal
| | - M Natália D S Cordeiro
- LAQV-REQUIMTE , Faculty of Sciences of the University of Porto , Rua do Campo Alegre , 4169-007 Porto , Portugal
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