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Fu C, Du K, Xue J, Xin H, Zhang J, Li H. Mechanisms of acid generation from ionic photoacid generators for extreme ultraviolet and electron beam lithography. Phys Chem Chem Phys 2024; 26:18547-18556. [PMID: 38805008 DOI: 10.1039/d4cp01814a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2024]
Abstract
Photoacid generators (PAGs) are important components of chemically amplified resists. The properties of PAGs directly affect the sensitivity of photoresists, line edge roughness, and resolution. Understanding the photoacid generation process in extreme ultraviolet (EUV) and electron beam (EB) lithography is helpful for photoresist design. However, the microscopic mechanisms remain largely unclear and the large variety in the molecular structure of PAGs presents a challenge to overcome. In this work, we investigate the microscopic processes of photoacid production of ionic PAGs for EUV and EB lithography. The PAG dissociation pathway is found to depend on the molecular structure and conformations. The processes of photoacid production and by-product generation are also revealed. The results contribute to a better understanding of the photochemical reactions in EUV and EB lithography, providing insights into the molecular design of novel PAGs and photoresists.
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Affiliation(s)
- Chengbin Fu
- School of Microelectronics, Shanghai University, Shanghai 201800, China.
- Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China
| | - Kun Du
- School of Microelectronics, Shanghai University, Shanghai 201800, China.
| | - Jie Xue
- School of Microelectronics, Shanghai University, Shanghai 201800, China.
| | - Hanshen Xin
- School of Microelectronics, Shanghai University, Shanghai 201800, China.
| | - Jianhua Zhang
- School of Microelectronics, Shanghai University, Shanghai 201800, China.
| | - Haoyuan Li
- School of Microelectronics, Shanghai University, Shanghai 201800, China.
- Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, China
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2
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Mohapatra S, Xian JLL, Galvez-Rodriguez A, Ekande OS, Drewes JE, Gin KYH. Photochemical fate of quaternary ammonium compounds (QACs) and degradation pathways predication through computational analysis. JOURNAL OF HAZARDOUS MATERIALS 2024; 465:133483. [PMID: 38232547 DOI: 10.1016/j.jhazmat.2024.133483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 11/30/2023] [Accepted: 01/08/2024] [Indexed: 01/19/2024]
Abstract
Quaternary ammonium compounds (QACs) are commonly used in many products, such as disinfectants, detergents and personal care products. However, their widespread use has led to their ubiquitous presence in the environment, posing a potential risk to human and environmental health. Several methods, including direct and indirect photodegradation, have been explored to remove QACs such as benzylalkyldimethyl ammonium compounds (BACs) and alkyltrimethyl ammonium compounds (ATMACs) from the environment. Hence, in this research, a systematic review of the literature was conducted using PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analysis) method to understand the fate of these QACs during direct and indirect photodegradation in UV/H2O2, UV/PS, UV/PS/Cu2+, UV/chlorine, VUV/UV/chlorine, O3/UV and UV/O3/TiO2 systems which produce highly reactive radicals that rapidly react with the QACs, leading to their degradation. As a result of photodegradation, several transformation products (TPs) of QACs are formed, which can pose a greater risk to the environment and human health than the parent QACs. Only limited research in this area has been conducted with fewer QACs. Hence, quantum mechanical calculations such as density functional theory (DFT)-based computational calculations using Gaussian09 software package were used here to explain better the photo-resistant nature of a specific type of QACs, such as BACs C12-18 and ATMACs C12, C14, C18, and their transformation pathways, providing insights into active sites participating in the phototransformation. Recognizing that different advanced oxidation processes (AOPs) come with pros and cons in the elimination of QACs, this review also highlighted the importance of implementing each AOP concerning the formation of toxic transformation products and electrical energy per order (EEO), especially when QACs coexist with other emerging contaminants (ECs).
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Affiliation(s)
- Sanjeeb Mohapatra
- NUS Environmental Research Institute, National University of Singapore, T-Lab Building, 5A Engineering Drive 1, 117411, Singapore; Energy and Environmental Sustainability for Megacities (E2S2) Phase II, Campus for Research Excellence and Technological Enterprise (CREATE), 1 CREATE Way, 138602, Singapore; Department of Water Management, Faculty of Civil Engineering and Geosciences, Delft University of Technology, P.O Box 5048, 2600 GA Delft, the Netherlands
| | - Jovina Lew Li Xian
- NUS Environmental Research Institute, National University of Singapore, T-Lab Building, 5A Engineering Drive 1, 117411, Singapore
| | | | - Onkar Sudhir Ekande
- Environmental Engineering Division, Department of Civil Engineering, Indian Institute of Technology Madras, Chennai 600036, Tamil Nadu, India
| | - Jörg E Drewes
- Chair of Urban Water Systems Engineering, Technical University of Munich, 85748 Garching, Germany
| | - Karina Yew-Hoong Gin
- NUS Environmental Research Institute, National University of Singapore, T-Lab Building, 5A Engineering Drive 1, 117411, Singapore; Energy and Environmental Sustainability for Megacities (E2S2) Phase II, Campus for Research Excellence and Technological Enterprise (CREATE), 1 CREATE Way, 138602, Singapore; Department of Civil & Environmental Engineering, National University of Singapore, Engineering Drive 2, 117576, Singapore.
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3
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Milanović Ž, Dimić D, Avdović EH, Simijonović DM, Nakarada Đ, Jakovljević V, Vojinović R, Marković ZS. Mechanism of Antiradical Activity of Coumarin-Trihydroxybenzohydrazide Derivatives: A Comprehensive Kinetic DFT Study. Antioxidants (Basel) 2024; 13:143. [PMID: 38397741 PMCID: PMC10885972 DOI: 10.3390/antiox13020143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 01/03/2024] [Accepted: 01/12/2024] [Indexed: 02/25/2024] Open
Abstract
As part of this study, the mechanisms of the antioxidant activity of previously synthesized coumarin-trihydrobenzohydrazine derivatives were investigated: (E)-2,4-dioxo-3-(1-(2-(2″,3″,4″-trihydroxybenzoyl)hydrazineyl)ethylidene)chroman-7-yl acetate (1) and (E)-2,4-dioxo-3-(1-(2-(3″,4″,5″-trihydroxybenzoyl)hydrazineyl)ethylidene)chroman-7-yl acetate (2). The capacity of the compounds to neutralize HO• was assessed by EPR spectroscopy. The standard mechanisms of antioxidant action, Hydrogen Atom Transfer (HAT), Sequential Proton Loss followed by Electron Transfer (SPLET), Single-Electron Transfer followed by Proton Transfer (SET-PT), and Radical Adduct/Coupling Formation (RAF/RCF) were examined using the QM-ORSA methodology. It was estimated that the newly synthesized compounds, under physiological conditions, exhibited antiradical activity via SPLET and RCF mechanisms. Based on the estimated overall rate constants (koverall), it can be concluded that 2 exhibited a greater antiradical capacity. The obtained values indicated a good correlation with the EPR spectroscopy results. Both compounds exhibit approximately 1.5 times more activity in comparison to the precursor compound used in the synthesis (gallic acid).
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Affiliation(s)
- Žiko Milanović
- Department of Science, Institute for Information Technologies, University of Kragujevac, Liceja Kneževine Srbije 1A, 34000 Kragujevac, Serbia; (Ž.M.); (E.H.A.); (D.M.S.); (Z.S.M.)
| | - Dušan Dimić
- Faculty of Physical Chemistry, University of Belgrade, Studentski trg 12-16, 11000 Belgrade, Serbia; (D.D.); (Đ.N.)
| | - Edina H. Avdović
- Department of Science, Institute for Information Technologies, University of Kragujevac, Liceja Kneževine Srbije 1A, 34000 Kragujevac, Serbia; (Ž.M.); (E.H.A.); (D.M.S.); (Z.S.M.)
| | - Dušica M. Simijonović
- Department of Science, Institute for Information Technologies, University of Kragujevac, Liceja Kneževine Srbije 1A, 34000 Kragujevac, Serbia; (Ž.M.); (E.H.A.); (D.M.S.); (Z.S.M.)
| | - Đura Nakarada
- Faculty of Physical Chemistry, University of Belgrade, Studentski trg 12-16, 11000 Belgrade, Serbia; (D.D.); (Đ.N.)
| | - Vladimir Jakovljević
- Faculty of Medical Sciences, University of Kragujevac, Svetozara Markovića 69, 34000 Kragujevc, Serbia;
| | - Radiša Vojinović
- Faculty of Medical Sciences, University of Kragujevac, Svetozara Markovića 69, 34000 Kragujevc, Serbia;
| | - Zoran S. Marković
- Department of Science, Institute for Information Technologies, University of Kragujevac, Liceja Kneževine Srbije 1A, 34000 Kragujevac, Serbia; (Ž.M.); (E.H.A.); (D.M.S.); (Z.S.M.)
- Department of Natural Science and Mathematics, State University of Novi Pazar, Vuka Karadžića bb, 36300 Novi Pazar, Serbia
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4
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Yu Y, Xu S, He R, Liang G. Application of Molecular Simulation Methods in Food Science: Status and Prospects. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:2684-2703. [PMID: 36719790 DOI: 10.1021/acs.jafc.2c06789] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Molecular simulation methods, such as molecular docking, molecular dynamic (MD) simulation, and quantum chemical (QC) calculation, have become popular as characterization and/or virtual screening tools because they can visually display interaction details that in vitro experiments can not capture and quickly screen bioactive compounds from large databases with millions of molecules. Currently, interdisciplinary research has expanded molecular simulation technology from computer aided drug design (CADD) to food science. More food scientists are supporting their hypotheses/results with this technology. To understand better the use of molecular simulation methods, it is necessary to systematically summarize the latest applications and usage trends of molecular simulation methods in the research field of food science. However, this type of review article is rare. To bridge this gap, we have comprehensively summarized the principle, combination usage, and application of molecular simulation methods in food science. We also analyzed the limitations and future trends and offered valuable strategies with the latest technologies to help food scientists use molecular simulation methods.
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Affiliation(s)
- Yuandong Yu
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, Bioengineering College, Chongqing University, Chongqing400030, China
| | - Shiqi Xu
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, Bioengineering College, Chongqing University, Chongqing400030, China
| | - Ran He
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, Bioengineering College, Chongqing University, Chongqing400030, China
| | - Guizhao Liang
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, Bioengineering College, Chongqing University, Chongqing400030, China
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5
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Trung NQ, Thu Thanh NT, Hoa NT, Mechler A, Vo QV. Feruloylmonotropeins: promising natural antioxidants in Paederia scandens. RSC Adv 2023; 13:6153-6159. [PMID: 36814870 PMCID: PMC9940704 DOI: 10.1039/d3ra00458a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2023] [Accepted: 02/10/2023] [Indexed: 02/22/2023] Open
Abstract
Paederia scandens (Lour.) is a widely used medicinal herb in Vietnam, China, India, and Japan for the treatment of a variety of conditions, including toothache, chest pains, piles, and spleen inflammation. There is broad interest in identifying the composition of its extracts and confirming their numerous biological activities, including anti-nociceptive, antiviral, and anticancer properties. Two iridoid glucosides obtained from the MeOH extract of P. scandens, 6'-O-E-feruloylmonotropein (6-FMT) and 10'-O-E-feruloylmonotropein (10-FMT), are potential antioxidants based on their structure. In this study, the hydroperoxyl scavenging activity of 6-FMT and 10-FMT was examined in silico by using density functional theory. These FMTs are predicted to be weak antioxidants in non-polar environments, whereas a good HOO˙ scavenging activity is expected in polar environments (pH = 7.4) with k overall = 3.66 × 107 M-1 s-1 and 9.45 × 106 M-1 s-1, respectively. This activity is better than many common antioxidants such as trolox and nearly equivalent to ascorbic acid and resveratrol. The hydroperoxyl scavenging activity was exerted mainly by the di-anion form of FMTs in water at physiological pH following the single electron transfer mechanism. The results suggest that FMTs are promising natural antioxidants in aqueous physiological environments.
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Affiliation(s)
- Nguyen Quang Trung
- The University of Danang - University of Science and Education Da Nang 550000 Vietnam .,Quality Assurance and Testing Center 2 Da Nang 550000 Vietnam
| | | | - Nguyen Thi Hoa
- The University of Danang - University of Technology and Education Danang 550000 Vietnam
| | - Adam Mechler
- Department of Biochemistry and Chemistry, La Trobe UniversityVictoria 3086Australia
| | - Quan V. Vo
- The University of Danang – University of Technology and EducationDanang 550000Vietnam
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6
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Fisetin and Robinetin antiradical activity under solvent effect: density functional theory study. J Mol Model 2022; 28:240. [PMID: 35913682 DOI: 10.1007/s00894-022-05223-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 07/13/2022] [Indexed: 10/16/2022]
Abstract
The structural and antioxidant activity of two flavonols, namely, Fisetin and Robinetin, have been investigated employing the density functional theory (DFT) using B3LYP functional and 6-311++G (d, p) basis set. The calculations were performed in the gas phase and under the solvent effect of water, dimethylsulfoxide (DMSO), methanol, and benzene. The Hydrogen-Atom Transfer (HAT), single Electron Transfer Followed by Proton Transfer (SET-PT), and sequential Proton Loss Electron Transfer (SPLET) mechanisms were investigated to rationalize the radical scavenging capacities and to identify the favored antioxidant mechanism. Hence, the bond dissociation enthalpies (BDE) ionization potential (IP), IE, proton dissociation enthalpy (PDE), proton affinity (PA), and electron Transfer enthalpy (ETE) related to each mechanism were reported and discussed in function of the solvent effect. For both flavonols, the results showed that 4'-OH hydroxyl is the preferred active site following the trend 4'-OH > 3'-OH > 3-OH > (5'-OH) > 7-OH. Besides, the HAT mechanism is energetically the most favored pathway. The energetically favored solvents follow the trends water > DMSO > benzene > methanol and benzene > DMSO > methanol > water, for Fisetin and Robinetin, respectively.
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7
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Nam PC, Trung NQ, Hoa NT, Bich HN, Manh TD, Quang DT, Mechler A, Vo QV. Oxoberberine: a promising natural antioxidant in physiological environments. RSC Adv 2022; 12:9738-9743. [PMID: 35424953 PMCID: PMC8961270 DOI: 10.1039/d2ra01372j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Accepted: 03/22/2022] [Indexed: 11/21/2022] Open
Abstract
Oxoberberine (OB, 2,10-dihydroxy-3,9-dimethoxy-8-oxo-protoberberine, artathomsonine), which was isolated from Artabotrys thomsonii, was shown to exhibit potent antioxidant activity in vitro, however that is the only reported evidence of the radical scavenging activity of this compound thus far. In the present study, thermodynamic and kinetic calculations were used to determine the free radical scavenging activity of OB against a range of biologically important species, under physiological conditions. In the first part the activity is calculated against the HOO˙ radical that is both biologically important and a reference radical for comparison. It was found that OB has high antiradical capacity against HOO˙ in both lipid medium and water at physiological pH with k overall = 1.33 × 105 and 1.73 × 106 M-1 s-1, respectively. The formal hydrogen transfer mechanism defined the activity in nonpolar environments, whereas in the aqueous solution the single electron transfer competes with the hydrogen transfer pathway. The results showed that, in lipid medium, the HOO˙ trapping capability of OB is better than typical antioxidants such as Trolox, BHT, resveratrol and ascorbic acid. Similarly, the activity of OB in water at pH 7.4 is roughly 19 and 7 times faster than those of Trolox and BHT, respectively, but slightly lower than the activities of resveratrol or ascorbic acid. In the second part, it was found that OB also exhibits high activity against other typical free radicals such as CH3O˙, CH3OO˙, CCl3OO˙, NO2, SO4˙-, DPPH and ABTS˙+ with k f ranging from 2.03 × 105 to 5.74 × 107 M-1 s-1. Hence, it is concluded that OB is a promising radical scavenger in the physiological environment.
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Affiliation(s)
- Pham Cam Nam
- Department of Chemical Engineering, The University of Danang-University of Science and Technology Danang 550000 Vietnam
| | - Nguyen Quang Trung
- The University of Danang-University of Science and Education Da Nang 550000 Vietnam
| | - Nguyen Thi Hoa
- The University of Danang - University of Technology and Education Danang 550000 Vietnam
| | - Huynh Ngoc Bich
- The University of Danang - University of Technology and Education Danang 550000 Vietnam
| | - Tran Duc Manh
- The University of Danang-University of Science and Education Da Nang 550000 Vietnam
| | | | - Adam Mechler
- Department of Chemistry and Physics, La Trobe University Victoria 3086 Australia
| | - Quan V Vo
- The University of Danang - University of Technology and Education Danang 550000 Vietnam
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8
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Wang R, Zhou S, Li J, Xu C, Zhang Y, Chen Z. Theoretical study on mechanism of decomposition reaction of 1,2,4-triazole derivatives. Mol Phys 2021. [DOI: 10.1080/00268976.2021.1994666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Renyi Wang
- National and Local Joint Engineering Research Center for Mineral Salt Deep Utilization, Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province, Huaiyin Institute of Technology, Huai’an, People’s Republic of China
| | - Suqin Zhou
- National and Local Joint Engineering Research Center for Mineral Salt Deep Utilization, Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province, Huaiyin Institute of Technology, Huai’an, People’s Republic of China
- The Engineering & Technical College of Chengdu University of Technology, Le’shan, People’s Republic of China
| | - Jin Li
- National and Local Joint Engineering Research Center for Mineral Salt Deep Utilization, Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province, Huaiyin Institute of Technology, Huai’an, People’s Republic of China
| | - Chenhong Xu
- National and Local Joint Engineering Research Center for Mineral Salt Deep Utilization, Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province, Huaiyin Institute of Technology, Huai’an, People’s Republic of China
| | - YanLi Zhang
- The Engineering & Technical College of Chengdu University of Technology, Le’shan, People’s Republic of China
| | - Zi Chen
- National and Local Joint Engineering Research Center for Mineral Salt Deep Utilization, Key Laboratory for Palygorskite Science and Applied Technology of Jiangsu Province, Huaiyin Institute of Technology, Huai’an, People’s Republic of China
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9
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Li R, Du T, Liu J, Aquino AJA, Zhang J. Theoretical Study of O-CH 3 Bond Dissociation Enthalpy in Anisole Systems. ACS OMEGA 2021; 6:21952-21959. [PMID: 34497890 PMCID: PMC8412933 DOI: 10.1021/acsomega.1c02310] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Accepted: 07/12/2021] [Indexed: 06/13/2023]
Abstract
Understanding ubiquitous methyl transfer reactions requires a systematic study of thermodynamical parameters that could reveal valuable information about the nature of the chemical bond and the feasibility of those processes. In the present study, the O-CH3 bond dissociation enthalpies (BDEs) of 67 compounds belonging to phenol/anisole systems were calculated employing the Gaussian-4 (G4) method. Those compounds contain different substituents including alkyl groups, electron-donating groups (EDGs), and electron-withdrawing groups (EWGs). The results show that the bigger branched alkyl groups and EDGs will destabilize the O-CH3 bond, while EWGs have the opposite effect. A combination of different effects including steric effects, hydrogen bonds, and substituents and their position can achieve around 20 kcal/mol difference compared to the basic phenyl frame. Also, the linear correlation between σp + and O-CH3 BDE can provide a reference for the O-CH3 BDE prediction. The present study represents a step forward to establish a comprehensive O-CH3 BDE database to understand the substituent effect and make its contribution to the rational design of inhibitors and drugs.
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Affiliation(s)
- Rui Li
- School
of Pharmaceutical Science and Technology, Tianjin University, No. 92 Weijin Road, Naikai District, Tianjin 300072, P. R. China
| | - Tianshu Du
- School
of Pharmaceutical Science and Technology, Tianjin University, No. 92 Weijin Road, Naikai District, Tianjin 300072, P. R. China
| | - Jingxing Liu
- School
of Pharmaceutical Science and Technology, Tianjin University, No. 92 Weijin Road, Naikai District, Tianjin 300072, P. R. China
| | - Adelia J. A. Aquino
- School
of Pharmaceutical Science and Technology, Tianjin University, No. 92 Weijin Road, Naikai District, Tianjin 300072, P. R. China
- Department
of Mechanical Engineering, Texas Tech University, Lubbock, Texas 79409, United States
- Institute
for Soil Research, University of Natural
Resources and Life Sciences, Peter-Jordan-Strasse 82, A-1190 Vienna, Austria
| | - Jianyu Zhang
- School
of Pharmaceutical Science and Technology, Tianjin University, No. 92 Weijin Road, Naikai District, Tianjin 300072, P. R. China
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10
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A density functional theory investigation on 1H-4-germapyridine-4-ylidene & the unsaturated heterocyclic substituted ones. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130427] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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11
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de Souza
Farias SA, da Costa KS, Martins JB. Analysis of Conformational, Structural, Magnetic, and Electronic Properties Related to Antioxidant Activity: Revisiting Flavan, Anthocyanidin, Flavanone, Flavonol, Isoflavone, Flavone, and Flavan-3-ol. ACS OMEGA 2021; 6:8908-8918. [PMID: 33842761 PMCID: PMC8028018 DOI: 10.1021/acsomega.0c06156] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Accepted: 03/01/2021] [Indexed: 06/03/2023]
Abstract
Understanding the antioxidant activity of flavonoids is important to investigate their biological activities as well as to design novel molecules with low toxicity and high activity. Aromaticity is a chemical property found in cyclic structures that plays an important role in their stability and reactivity, and its investigation can help us to understand the antioxidant activity of some heterocyclic compounds. In the present study, we applied the density functional theory (DFT) to investigate the properties of seven flavonoid structures with well-reported antioxidant activity: flavan, anthocyanidin, flavanone, flavonol, isoflavone, flavone, and flavan-3-ol. Conformational, structural, magnetic, and electronic analyses were performed using nuclear magnetic resonance, ionization potentials, electron affinity, bond dissociation energy, proton affinity, frontier molecular orbitals (highest occupied molecular orbital (HOMO)/lowest unoccupied molecular orbital (LUMO)), and aromaticity through nucleus-independent chemical shifts to analyze these seven flavonoid structures. We revised the influence of hydroxyl groups on the properties of flavonoids and also investigated the influence of the aromaticity of these seven flavonoids on the antioxidant activity.
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Affiliation(s)
- Sergio Antônio de Souza
Farias
- Laboratory
of Molecular Modeling, Institute of Educational Sciences, Federal University of Western Pará, 68040-255 Santarém, Pará, Brazil
| | - Kauê Santana da Costa
- Institute
of Biodiversity, Federal University of Western
Pará, 68040-255 Santarém, Pará, Brazil
| | - João B.
L. Martins
- Laboratory
of Computational Chemistry, Institute of Chemistry, University of Brasilia, 4478 Brasília, Distrito
Federal, Brazil
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12
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Influence of catecholic ring torsion on hydroxyflavones. ACTA CHIMICA SLOVACA 2020. [DOI: 10.2478/acs-2020-0008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
Systematic quantum chemical investigation of quercetin and selected eight mono- and bihydroxyflavonols is presented. Structural analysis based on the Density Functional Theory showed that the energetically preferred conformation of flavonols substituted at the C5 and C3 atoms by a hydroxyl group is stabilised via intramolecular hydrogen bonds occurring between the (C4)O···HO(3 or 5) atomic pairs. Depending on the hydroxyl group positions, energetically preferred torsional orientation of the phenyl ring with respect to the planar benzo-γ-pyrone moiety changed from 0 to 180 degrees. Gas-phase electron transitions were investigated using the time-dependent DFT treatment. The dependence of maximal wavelengths on the torsional deformation of the phenyl ring is of a similar shape, i.e. minima observed for the perpendicular orientation and maxima for the planar one. Shape and energies of the Highest Occupied (HOMO) and Lowest Unoccupied (LUMO) Molecular Orbitals were compared. The obtained theoretical results were compared with available experimental data.
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13
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Vo QV, Tam NM, Hieu LT, Van Bay M, Thong NM, Le Huyen T, Hoa NT, Mechler A. The antioxidant activity of natural diterpenes: theoretical insights. RSC Adv 2020; 10:14937-14943. [PMID: 35497147 PMCID: PMC9052119 DOI: 10.1039/d0ra02681f] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Accepted: 04/02/2020] [Indexed: 01/18/2023] Open
Abstract
Diterpenes that were isolated from Crossopetalum gaumeri (Loes.) Lundell (Celastraceae) plants are reported to exhibit a range of biological activities, in particular as radical scavengers. Thus further insight into the antioxidant activity of diterpenes in physiological environments is much needed but not studied yet. In this study, the antioxidant activity of nine natural diterpenes was evaluated using kinetic and thermodynamic calculations. It was found that the sequential proton loss electron transfer (SPLET) mechanism is favored in polar environments, whereas formal hydrogen transfer (FHT) is the main pathway for the radical scavenging of these diterpenes in the gas phase as well as in lipid media. The rate constants for the HOO˙ radical scavenging of these compounds in the gas phase, polar and nonpolar solvents are in the range of 2.29 × 10−2 to 4.58 × 107, 9.74 × 10−3 to 1.67 × 108 and 3.54 × 10−5 to 1.31 × 105 M−1 s−1, respectively. 7-Deoxynimbidiol (6), exhibits the highest HOO˙ radical scavenging with koverall = 1.69 × 108 M−1 s−1 and 9.10 × 104 M−1 s−1 in water and pentyl ethanoate solvents, respectively, that is about 1300 times higher than that of Trolox in polar environments. It is thus a promising natural antioxidant in physiological environments. Diterpenes that were isolated from Crossopetalum gaumeri (Loes.) Lundell (Celastraceae) plants are reported to exhibit a range of biological activities, in particular as radical scavengers.![]()
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Affiliation(s)
- Quan V. Vo
- Institute of Research and Development
- Duy Tan University
- Danang 550000
- Vietnam
- Faculty of Chemical Technology - Environment
| | - Nguyen Minh Tam
- Computational Chemistry Research Group
- Ton Duc Thang University
- Ho Chi Minh City
- Vietnam
- Faculty of Applied Sciences
| | - Le Trung Hieu
- University of Sciences-Hue University
- Hue 530000
- Vietnam
| | - Mai Van Bay
- Department of Chemistry
- The University of Danang-
- University of Science and Education
- Danang 550000
- Vietnam
| | | | - Trinh Le Huyen
- Department of Applied Chemistry
- National Chiao Tung University
- Hsinchu 30010
- Taiwan
- Department of Chemical Engineering
| | - Nguyen Thi Hoa
- Academic Affairs
- The University of Danang-University of Technology and Education
- Danang 550000
- Vietnam
| | - Adam Mechler
- Department of Chemistry and Physics
- La Trobe University
- Victoria 3086
- Australia
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14
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Brovarets’ OO, Hovorun DM. Intramolecular tautomerization of the quercetin molecule due to the proton transfer: QM computational study. PLoS One 2019; 14:e0224762. [PMID: 31751372 PMCID: PMC6874073 DOI: 10.1371/journal.pone.0224762] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2019] [Accepted: 10/20/2019] [Indexed: 12/21/2022] Open
Abstract
Quercetin molecule (3, 3', 4', 5, 7-pentahydroxyflavone, C15H10O7) is an important flavonoid compound of natural origin, consisting of two aromatic A and B rings linked through the C ring with endocyclic oxygen atom and five hydroxyl groups attached to the 3, 3', 4', 5 and 7 positions. This molecule is found in many foods and plants, and is known to have a wide range of therapeutic properties, like an anti-oxidant, anti-toxic, anti-inflammatory etc. In this study for the first time we have revealed and investigated the pathways of the tautomeric transformations for the most stable conformers of the isolated quercetin molecule (Brovarets' & Hovorun, 2019) via the intramolecular proton transfer. Energetic, structural, dynamical and polar characteristics of these transitions, in particular relative Gibbs free and electronic energies, characteristics of the intramolecular specific interactions-H-bonds and attractive van der Waals contacts, have been analysed in details. It was demonstrated that the most probable process among all investigated is the proton transfer from the O3H hydroxyl group of the C ring to the C2' carbon atom of the C2'H group of the B ring along the intramolecular O3H…C2' H-bond with the further formation of the C2'H2 group. It was established that the proton transfer from the hydroxyl groups to the carbon atoms of the neighboring CH groups is assisted at the transition states by the strong intramolecular HCH…O H-bond (~28.5 kcal∙mol-1). The least probable path of the proton transfer-from the C8H group to the endocyclic O1 oxygen atom-causes the decyclization of the C ring in some cases. It is shortly discussed the biological importance of the obtained results.
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Affiliation(s)
- Ol’ha O. Brovarets’
- Department of Molecular and Quantum Biophysics, Institute of Molecular Biology and Genetics, National Academy of Sciences of Ukraine, Kyiv, Ukraine
| | - Dmytro M. Hovorun
- Department of Molecular and Quantum Biophysics, Institute of Molecular Biology and Genetics, National Academy of Sciences of Ukraine, Kyiv, Ukraine
- Department of Molecular Biotechnology and Bioinformatics, Institute of High Technologies, Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
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15
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Brovarets’ OO, Hovorun DM. Conformational diversity of the quercetin molecule: a quantum-chemical view. J Biomol Struct Dyn 2019; 38:2817-2836. [DOI: 10.1080/07391102.2019.1656671] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Ol’ha O. Brovarets’
- Department of Molecular and Quantum Biophysics, Institute of Molecular Biology and Genetics, National Academy of Sciences of Ukraine, Kyiv, Ukraine
| | - Dmytro M. Hovorun
- Department of Molecular and Quantum Biophysics, Institute of Molecular Biology and Genetics, National Academy of Sciences of Ukraine, Kyiv, Ukraine
- Department of Molecular Biotechnology and Bioinformatics, Institute of High Technologies, Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
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16
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Brovarets’ OO, Hovorun DM. Conformational transitions of the quercetin molecule via the rotations of its rings: a comprehensive theoretical study. J Biomol Struct Dyn 2019; 38:2865-2883. [DOI: 10.1080/07391102.2019.1645734] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Ol’ha O. Brovarets’
- Department of Molecular and Quantum Biophysics, Institute of Molecular Biology and Genetics, National Academy of Sciences of Ukraine, Kyiv, Ukraine
- Department of Pharmacology, Bohomolets National Medical University, Kyiv, Ukraine
| | - Dmytro M. Hovorun
- Department of Molecular and Quantum Biophysics, Institute of Molecular Biology and Genetics, National Academy of Sciences of Ukraine, Kyiv, Ukraine
- Department of Molecular Biotechnology and Bioinformatics, Institute of High Technologies, Taras Shevchenko National University of Kyiv, Kyiv, Ukraine
- Department of Pathophysiology, Bohomolets National Medical University, Kyiv, Ukraine
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17
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Zheng YZ, Deng G, Guo R, Fu ZM, Chen DF. The influence of the H5⋯OC4 intramolecular hydrogen-bond (IHB) on the antioxidative activity of flavonoid. PHYTOCHEMISTRY 2019; 160:19-24. [PMID: 30669059 DOI: 10.1016/j.phytochem.2019.01.011] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Revised: 01/14/2019] [Accepted: 01/15/2019] [Indexed: 06/09/2023]
Abstract
Flavonoids widely found in natural foods are characterized by acting as antioxidants compounds. There are close relationship between the antiradical activities and structural properties of flavonoids. In this work, density functional theory (DFT) methods were applied to investigate the influence of the H5⋯OC4 intramolecular hydrogen-bond (IHB) on the antiradical activity of flavonoid based on three prevalently accepted radical scavenging mechanisms: hydrogen atom transfer (HAT), single electron transfer-proton transfer (SET-PT) and sequential proton-loss electron-transfer (SPLET). The thermodynamic properties: bond dissociation enthalpy (BDE), ionization potential (IP), proton dissociation enthalpy (PDE), proton affinity (PA) and electron transfer enthalpy (ETE) related with these mechanisms were calculated to elucidate the antiradical activity. The results showed that the 5-OH group is most influenced and its antiradical capacity was weakened by the H5⋯OC4 IHB. In the gas, benzene and chloroform phases, H5⋯OC4 IHB would reduce the antiradical activity of flavonoid via increasing the bond dissociation enthalpy. While, in the DMSO and H2O phases, the opposite result occurs by lowering the proton affinity.
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Affiliation(s)
- Yan-Zhen Zheng
- College of Bee Science, Fujian Agriculture and Forestry University, Fuzhou 350002, PR China
| | - Geng Deng
- Key Laboratory of Bioorganic Phosphorous Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, PR China
| | - Rui Guo
- College of Bee Science, Fujian Agriculture and Forestry University, Fuzhou 350002, PR China
| | - Zhong-Min Fu
- College of Bee Science, Fujian Agriculture and Forestry University, Fuzhou 350002, PR China
| | - Da-Fu Chen
- College of Bee Science, Fujian Agriculture and Forestry University, Fuzhou 350002, PR China.
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18
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Tautomerism and conformational analysis in 3-fluoropiperidin-2-one inform on F···HO intramolecular hydrogen bond. J Fluor Chem 2019. [DOI: 10.1016/j.jfluchem.2018.10.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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19
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Xu J, Yi L, Mou Y, Cao J, Wang C. Effect of a molecule of imidazolium bromide ionic liquid on the structure and properties of cytosine by density functional theory. Chem Phys Lett 2018. [DOI: 10.1016/j.cplett.2018.08.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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20
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Zhang X, Jiang L, Li S, Wang K. A theoretical study on platinum-catalyzed cycloisomerization of 2-ethynyl-1-ferrocenylbenzene. COMPUT THEOR CHEM 2017. [DOI: 10.1016/j.comptc.2017.05.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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21
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Rusinska-Roszak D. Energy of Intramolecular Hydrogen Bonding in ortho-Hydroxybenzaldehydes, Phenones and Quinones. Transfer of Aromaticity from ipso-Benzene Ring to the Enol System(s). Molecules 2017; 22:E481. [PMID: 28335484 PMCID: PMC6155192 DOI: 10.3390/molecules22030481] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 03/13/2017] [Accepted: 03/15/2017] [Indexed: 01/10/2023] Open
Abstract
Intramolecular hydrogen bonding (HB) is one of the most studied noncovalent interactions of molecules. Many physical, spectral, and topological properties of compounds are under the influence of HB, and there are many parameters used to notice and to describe these changes. Hitherto, no general method of measurement of the energy of intramolecular hydrogen bond (EHB) has been put into effect. We propose the molecular tailoring approach (MTA) for EHB calculation, modified to apply it to Ar-O-H∙∙∙O=C systems. The method, based on quantum calculations, was checked earlier for hydroxycarbonyl-saturated compounds, and for structures with resonance-assisted hydrogen bonding (RAHB). For phenolic compounds, the accuracy, repeatability, and applicability of the method is now confirmed for nearly 140 structures. For each structure its aromaticity HOMA indices were calculated for the central (ipso) ring and for the quasiaromatic rings given by intramolecular HB. The comparison of calculated HB energies and values of estimated aromaticity indices allowed us to observe, in some substituted phenols and quinones, the phenomenon of transfer of aromaticity from the ipso-ring to the H-bonded ring via the effect of electron delocalization.
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Affiliation(s)
- Danuta Rusinska-Roszak
- Institute of Chemical Technology and Engineering, Poznan University of Technology, ul. Berdychowo 4, 60-965 Poznan, Poland.
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