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Kenawy ER, Ibrahim A, Al-Hossainy AF. Study of the structural characteristics, optical properties, and electrical conductivity of doped [P(An-MMa)/ZrO 2] TF nanofiber composite using experimental data and TD-DFT/DMol 3 computations. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:106755-106773. [PMID: 35994152 PMCID: PMC10611668 DOI: 10.1007/s11356-022-22477-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 08/07/2022] [Indexed: 06/15/2023]
Abstract
The powder form of the new nanofiber composite of poly(acrylonitrile-co-methylmethacrylate) (P(An-MMa)) with zirconium dioxide (ZrO2) was synthesized using the sol-gel method and subsequently converted to a thin film [P(An-MMa)/ZrO2]TF via the physical vapor deposition (PVD) technique. Numerous characterization techniques, including Raman spectroscopy, X-ray diffraction (XRD), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and ultraviolet-visible (UV-Vis) optical spectroscopy, were used to characterize [P(An-MMa)/ZrO2]TF. Additionally, using density functional theory (DFT), optimization via time-dependent density functional theory (TD-DFT/DMol3) and Cambridge Serial Total Energy Bundle (TD-DFT/CASTEP) was developed. The TD-DFT calculations accurately matched the observed XRD and Raman spectra and validated the molecular structure of the examined materials. The average crystallite size of [P(An-MMa)/ZrO2]TF, as determined by XRD calculations, is 171.04 nm. The SEM image depicts a one-dimensional morphological structure made up of tightly packed fibrous nanowires or brushes. The optical properties of the films were determined using optical absorbance spectrophotometric results in the 200-850-nm wavelength range. The optical energy bandgaps computed using Tauc's equation for [P(An-MMa)/ZrO2]TF are 2.352 and 2.253 eV, respectively, whereas the isolated molecule of the composite [P(An-MMa)/ZrO2]Iso has a bandgap of 2.415 eV as determined by TD-DFT/DMol3. The optical characteristics predicted by CASTEP in TD-DFT are in good agreement with the experimental values. The investigated large optical energy bandgap nanofiber composite is advantageous for some energy storage applications.
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Affiliation(s)
- El-Refaie Kenawy
- Polymer Research Group, Chemistry Department, Faculty of Science, Tanta University, Tanta, 31527, Egypt
| | - Ali Ibrahim
- Physics Department, Faculty of Science, Tanta University, Tanta, 31527, Egypt
| | - Ahmed F Al-Hossainy
- Chemistry Department, Faculty of Science, New Valley University, El-Kharga 72511, New Valley, Egypt.
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Mohamed NS, Ibrahim SM, Ahmed MM, Al-Hossainy AF. Removal of Toxic Basic Fuchsin Dye from Liquids by Antibiotic Azithromycin Using Adsorption, TD-DFT Calculations, Kinetic, and Equilibrium Studies. Ind Eng Chem Res 2023. [DOI: 10.1021/acs.iecr.2c04096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Affiliation(s)
- Nora S. Mohamed
- Chemistry Department, Faculty of Science, New Valley University, El-Kharga 72511, New Valley, Egypt
| | - Samia M. Ibrahim
- Chemistry Department, Faculty of Science, New Valley University, El-Kharga 72511, New Valley, Egypt
| | - Mahmoud M. Ahmed
- Chemistry Department, Faculty of Science, New Valley University, El-Kharga 72511, New Valley, Egypt
| | - Ahmed F. Al-Hossainy
- Chemistry Department, Faculty of Science, New Valley University, El-Kharga 72511, New Valley, Egypt
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Kök M, Pekdemir ME, Özen Öner E, Coşkun M, Hekim S. MWCNT nanocomposite films prepared using different ratios of PVC/PCL: Combined FT-IR/DFT, thermal and shape memory properties. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2023.134989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Nhlapo T, Mokoena T, Msomi J, Moyo T, Mahule T, Nyathi M. Synthesis, Electron Spin Resonance and Photoluminescence properties of Sm3+ ion doped Zn-Mn nanoferrites synthesized by glycol-thermal method. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Dinagaran S, Gajendiran J, Raj SG, Gnanam S. Growth, physico-chemical properties, opto-electrical characteristics, thermo-mechanical and DFT studies of 4-aminoantipyrine single crystals. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.134084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Hassanien R, Hassan ZA, Al-Assy W, Ibrahim SM. Removal of toxic thymol sulfone phthalein dye from wastewater by using efficient adsorbent NiO nanoparticles. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133864] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
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Arthur DE, Elegbe BO, Aroh AO, Soliman M. Computational drug design of novel COVID-19 inhibitor. BULLETIN OF THE NATIONAL RESEARCH CENTRE 2022; 46:210. [PMID: 35854796 PMCID: PMC9284480 DOI: 10.1186/s42269-022-00892-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Accepted: 06/28/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND In 2003, the first case of severe acute respiratory syndrome coronavirus (SARS-CoV) was recorded. Coronaviruses (CoVs) have caused a major outbreak of human fatal pneumonia. Currently, there is no specific drug or treatment for diseases caused by SARS CoV 2. Computational approach that adopts dynamic models is widely accepted as indispensable tool in drug design but yet to be exploited in covid-19 in Zaria, Nigeria. In this study, steps were taken to advance on the successful achievements in the field of covid-19 drug, with the aid of in silico drug design technique, to create novel inhibitor drug candidates with better activity. In this study, one thousand human immunodeficiency virus (HIV1) antiviral chemical compounds from www.bindingBD.org were docked on the SARS CoV 2 main protease protein data bank identification number 6XBH (PDB ID: 6XBH) and the molecular docking score were ranked in order to identify the compounds with the highest inhibitory effects, and easy selection for future studies. RESULTS The docking studies showed some interesting results. Inhibitors with Index numbers 331, 741, and 819 had the highest binding affinity. Similarly, inhibitors with Index number 441, 847, and 46 had the lowest hydrogen bond energy. Inhibitor with index number 331 was reported with the lowest value (- 48.38kCal/mol). Five new compounds were designed from the selected six (6) compounds with the best binding score giving a total of thirty (30) novel compounds. The low binding energy of inhibitor with index no. 847b is unique, as most of the interaction energies are of H-bond type with amino acids (Thr26, Gly143, Ser144, Cys145, Glu166, Gln189, Hie164, Met49, Thr26, Thr25, Thr190, Asn142, Met165) resulting in an overall negative value (-16.31 kCal/mol) making it the best of all the newly designed inhibitors. CONCLUSIONS The novel inhibitor is 2-(2-(5-amino-2-((((3-aminobenzyl)oxy)carbonyl)amino)-5-oxopentanamido)-4-(2-(tert-butyl)-4-oxo-4-(pentan-3-ylamino) butanamido)-3-hydroxybutyl) benzoic acid. The improvement it has over the parent inhibitor is from the primary amine group attached to meta position of first benzene ring and the carboxyl group attached to the ortho position of the second benzene ring. The molecular dynamics studies also show that the novel inhibitor remains stable after the study. This result makes it a better drug candidate against SARS CoV 2 main protease when compared with the co-crystallized inhibitor or any of the 1000 docked inhibitors. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1186/s42269-022-00892-z.
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Affiliation(s)
- David Ebuka Arthur
- Department of Pure and Applied Chemistry, University of Maiduguri, Maiduguri, Nigeria
| | | | | | - Mahmoud Soliman
- Department of Pharmaceutical Sciences, University of KwaZulu Natal, Durban, South Africa
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Shalaby MG, Al-Hossainy AF, Abo-Zeid AM, Mobark H, Mahmoud YA. Synthesis, characterization, physicochemical properties, and in-vitro anti-bacterial evaluation for doped Fe-Fusarium oxysporum bio-nanocomposite. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132643] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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9
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Ghazy AR, Shalaby MG, Ibrahim A, ElShaer A, Mahmoud YAG, Al-Hossainy AF. Synthesis, structural and optical properties of Fungal biosynthesized Cu2O nanoparticles doped Poly methyl methacrylate -co- Acrylonitrile copolymer nanocomposite films using experimental data and TD-DFT/DMOl3 computations. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Ali H, El-Aal MA, Al-Hossainy AF, Ibrahim SM. Kinetics and Mechanism Studies of Oxidation of Dibromothymolsulfonphthalein Toxic Dye by Potassium Permanganate in Neutral Media with the Synthesis of 2-Bromo-6-isopropyl-3-methyl-cyclohexa-2,5-dienone. ACS OMEGA 2022; 7:16109-16115. [PMID: 35571771 PMCID: PMC9096973 DOI: 10.1021/acsomega.2c01462] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Accepted: 04/19/2022] [Indexed: 06/15/2023]
Abstract
The oxidation of 3',3″-dibromothymolsulfonphthalein (DBTS) in neutral medium by potassium permanganate multi-equivalent oxidant has been studied spectrophotometrically. Pseudo-first-order plots showed inverted S-shape throughout the entire course of the reaction. The initial rates were found to be relatively fast in the early stages, followed by a decrease in the oxidation rates over longer time periods in the slow stage. Under pseudo-first-order conditions where [DBTS] ≫ 10 [MnO4 -], the experimental results showed a first-order dependence in [MnO4 -] and fractional-first-order kinetics in the [DBTS] concentration. The formation of 1:1 coordination intermediate complex prior to the rate-determining step was revealed kinetically. In addition, the intermediate species involving complexes of Mn(V) coordination has been detected. The oxidation product of DBTS was identified by Fourier transform infrared spectroscopy, ultraviolet-visible spectrophotometry, and gas chromatography-mass analysis. The obtained results indicated the formation of 2-bromo-6-isopropyl-3-methyl-cyclohexa-2,5-dienone as a derivative oxidation of DBTS.
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Affiliation(s)
- Hazim
M. Ali
- Department
of Chemistry, College of Science, Jouf University, P.O. Box 2014, Sakaka 72388, Aljouf, Saudi
Arabia
| | - Mohamed Abd El-Aal
- Catalysis
and Surface Chemistry Lab, Chemistry Department, Faculty of Science, Assiut University, Assiut 71516, Egypt
| | - Ahmed F. Al-Hossainy
- Chemistry
Department, Faculty of Science, New Valley
University, El-Kharga, New Valley 72511, Egypt
| | - Samia M. Ibrahim
- Chemistry
Department, Faculty of Science, New Valley
University, El-Kharga, New Valley 72511, Egypt
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Ibrahim SM, Saad N, Ahmed MM, Abd El-Aal M. Novel synthesis of antibacterial pyrone derivatives using kinetics and mechanism of oxidation of azithromycin by alkaline permanganate. Bioorg Chem 2021; 119:105553. [PMID: 34920338 DOI: 10.1016/j.bioorg.2021.105553] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Revised: 12/05/2021] [Accepted: 12/08/2021] [Indexed: 01/25/2023]
Abstract
Dimethylamino-2H-5-dihydropyrane-6-methyl-4-one (DADHP) is a novel antibacterial pyrones derivatives and potential pharmaceutical that was quantitatively synthesized by oxidizing azithromycin (AZ) antibiotic with potassium permanganate in an alkaline medium (pH > 12). The oxidation reaction was kinetically studied using spectrophotometric technique at ionic strength equal to 0.02 mol dm-3. The redox reaction was discovered to have two separate stages that could be measured. The first stage was relatively fast and corresponding to the formation of coordination intermediate complexes involving blue hypomanganate (V) and/or green manganate (VI) transient species. Variable parameters like as the concentration of permanganate ion and AZ substrate, as well as pH and ionic strength, have been studied to see how they affect oxidation rates. The experimental results showed a first-order dependency in [MnO4-] and fractional first-order kinetics in each of [AZ] and alkali concentration under pseudo-first-order reaction conditions of [AZ] ≫ 10 [MnO4-]. The oxidation process was base-catalyzed, and the oxidation rates increased as the alkali concentration increased. The product was confirmed by Fourier Transform Infrared spectroscopy (FTIR), elemental analysis, condensation tests with 2,4-dinitrophenyl haydrazine and hydroxyl amine, and GC-Mass. The oxidation product obtained can be employed as interesting class of organic compounds with diverse chemical and pharmacological applications.
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Affiliation(s)
- Samia M Ibrahim
- Chemistry Department, Faculty of Science, New Valley University, El-Kharga, New Valley 72511, Egypt.
| | - Nora Saad
- Chemistry Department, Faculty of Science, New Valley University, El-Kharga, New Valley 72511, Egypt
| | - Mahmoud M Ahmed
- Chemistry Department, Faculty of Science, New Valley University, El-Kharga, New Valley 72511, Egypt
| | - Mohamed Abd El-Aal
- Chemistry Department, Faculty of Science, Assiut University, Assiut 71516 Egypt
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