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Tanjedrew N, Thammanatpong K, Surawatanawong P, Chakthranont P, Chantarojsiri T, Unjarern T, Kiatisevi S. Tunable Metal-Free Imidazole-Benzimidazole Electrocatalysts for Oxygen Reduction in Aqueous Solutions. Chemistry 2024; 30:e202302854. [PMID: 37924228 DOI: 10.1002/chem.202302854] [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: 09/01/2023] [Revised: 11/03/2023] [Accepted: 11/03/2023] [Indexed: 11/06/2023]
Abstract
A series of metal-free imidazole-benzimidazole catalysts (ImBenz-H, ImBenz-NO2 , ImBenz-OCH3 ) for oxygen reduction reaction (ORR) were prepared. We demonstrate that the electrocatalytic O2 reduction by ImBenz-NO2 with the electron-withdrawing group showed high selectivity toward H2 O with the number of electrons transferred (n=3.7) in a neutral aqueous solution. The highest ORR selectivity toward H2 O2 was achieved using ImBenz-H (n=2.4) in an alkaline solution. Electrochemical studies of reaction kinetics disclosed that the highest turnover frequencies were obtained from ImBenz-H in both neutral and alkaline aqueous solutions. The results prove that the ORR selectivity is tunable by modulating the substituent of the ImBenz catalysts. Furthermore, DFT calculations suggested that the ORR mechanism of ImBenz-H involves the electron transfer from imidazole-benzimidazole to O2 resulting in the formation of H2 O2 which supports the redox active properties of the catalysts ImBenz.
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Affiliation(s)
- Narisara Tanjedrew
- Department of Chemistry and, Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Bangkok, 10400, Thailand
| | - Kittimeth Thammanatpong
- Department of Chemistry and, Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Bangkok, 10400, Thailand
| | - Panida Surawatanawong
- Department of Chemistry and, Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Bangkok, 10400, Thailand
| | - Pongkarn Chakthranont
- National Nanotechnology Center (NANOTEC), National Science and Technology Development Agency (NSTDA), 111 Thailand Science Park, Pathum Thani, 12120, Thailand
| | - Teera Chantarojsiri
- Department of Chemistry and, Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Bangkok, 10400, Thailand
| | - Takdanai Unjarern
- Department of Chemistry and, Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Bangkok, 10400, Thailand
| | - Supavadee Kiatisevi
- Department of Chemistry and, Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Bangkok, 10400, Thailand
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Reddy TS, Raja K, Mandapati KR, Goli SR, Babu MSS. Efficient Approach for the Synthesis of Aryl Vinyl Ketones and Its Synthetic Application to Mimosifoliol with DFT and Autodocking Studies. Molecules 2023; 28:6214. [PMID: 37687043 PMCID: PMC10488981 DOI: 10.3390/molecules28176214] [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: 07/25/2023] [Revised: 08/16/2023] [Accepted: 08/20/2023] [Indexed: 09/10/2023] Open
Abstract
An efficient and elegant method was developed for the preparation of substituted phenyl vinyl ketones using low-cost and commercially available ethyl chloroformate and diisopropylethylamine as reagents. This methodology was also applied to the synthesis of natural products such as mimosifoliol and quinolines. Frontier molecular orbital (FMO) studies on mimosifoliol were carried out to understand its chemical reactivity. Electron localization function (ELF) and localized orbital locator (LOL) analysis gave information about localized and delocalized electrons. Reduced density gradient (RDG) analysis gave information on steric, van der Waals, and hydrogen-bonding interactions. Molecular electrostatic potential (MEP) and Fukui functions gave information about nucleophilic and electrophilic attack. Nonlinear optical (NLO) analysis represented the mimosifoliol good NLO material. Molecular docking showed that the mimosifoliol compound had effectively inhibited the aspulvinone dimethylallyltransferase enzyme.
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Affiliation(s)
- Tummuri Sudheer Reddy
- Department of Chemistry, GITAM University Hyderabad Campus, Hyderabad 502329, Telangana, India;
| | - Karreddula Raja
- Department of Chemistry, Rajeev Gandhi Memorial College of Engineering and Technology (Autonomous), Nandyal 518501, Andhra Pradesh, India;
| | - Kishore Reddy Mandapati
- Synaptics Labs Private Limited, Kurmannapalem, Matrusri Nagar, Gajuwaka, Visakhapatnam 530026, Andhra Pradesh, India
| | - Srinivasa Reddy Goli
- Synaptics Labs Private Limited, Kurmannapalem, Matrusri Nagar, Gajuwaka, Visakhapatnam 530026, Andhra Pradesh, India
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Akman F, Demirpolat A, Kazachenko AS, Kazachenko AS, Issaoui N, Al-Dossary O. Molecular Structure, Electronic Properties, Reactivity (ELF, LOL, and Fukui), and NCI-RDG Studies of the Binary Mixture of Water and Essential Oil of Phlomis bruguieri. Molecules 2023; 28:molecules28062684. [PMID: 36985656 PMCID: PMC10056484 DOI: 10.3390/molecules28062684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Revised: 02/28/2023] [Accepted: 03/06/2023] [Indexed: 03/19/2023] Open
Abstract
Essential oils are volatile oil-like liquids with a characteristic strong smell and taste. They are formed in plants and are then extracted. Essential oils have extremely strong physiological and pharmacological properties, which are used in the medicine, cosmetics, and food industries. In this study, the molecules caryophyllene oxide, β-pinene, 1,8-cineol, α-cubebene, and β-caryophyllene, which are the molecules with the highest contents in the essential oil of the plant mentioned in the title, were selected and theoretical calculations describing their interactions with water were performed. Because oil–water mixtures are very important in biology and industry and are ubiquitous in nature, quantum chemical calculations for binary mixtures of water with caryophyllene oxide, β-pinene, 1,8-cineol, α-cubebene, and β-caryophyllene were performed using the density functional theory (DFT)/B3LYP method with a basis of 6–31 G (d, p). Molecular structures, HOMO–LUMO energies, electronic properties, reactivity (ELF, LOL, and Fukui), and NCI-RDG and molecular electrostatic potential (MEP) on surfaces of the main components of Phlomis bruguieri Desf. essential oil were calculated and described.
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Affiliation(s)
- Feride Akman
- Vocational School of Food, Agriculture and Livestock, University of Bingöl, Bingöl 12000, Turkey
- Correspondence: (F.A.); or (A.S.K.)
| | - Azize Demirpolat
- Vocational School of Food, Agriculture and Livestock, University of Bingöl, Bingöl 12000, Turkey
| | - Aleksandr S. Kazachenko
- School of Non-Ferrous Metals and Materials Science, Siberian Federal University, Pr. Svobodny 79, 660041 Krasnoyarsk, Russia
- Siberian Branch, FRC “Krasnoyarsk Scientific Center”, Institute of Chemistry and Chemical Technology, Russian Academy of Sciences, Akademgorodok 50, Bld. 24, 660036 Krasnoyarsk, Russia
- Department of Biological Chemistry with Courses in Medical, Pharmaceutical and Toxicological Chemistry, Krasnoyarsk State Medical University, St. Partizan Zheleznyak, Bld. 1, 660022 Krasnoyarsk, Russia
- Correspondence: (F.A.); or (A.S.K.)
| | - Anna S. Kazachenko
- School of Non-Ferrous Metals and Materials Science, Siberian Federal University, Pr. Svobodny 79, 660041 Krasnoyarsk, Russia
| | - Noureddine Issaoui
- Laboratory of Quantum and Statistical Physics, LR18ES18, Faculty of Sciences, University of Monastir, Monastir 5079, Tunisia
| | - Omar Al-Dossary
- Departement of Physics and Astronomy, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
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