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Guan T, Bian C, Ma Z. In vitro and in silico perspectives on the activation of antioxidant responsive element by citrus-derived flavonoids. Front Nutr 2023; 10:1257172. [PMID: 37674886 PMCID: PMC10478098 DOI: 10.3389/fnut.2023.1257172] [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: 07/13/2023] [Accepted: 08/07/2023] [Indexed: 09/08/2023] Open
Abstract
Introduction Oxidative stress plays an essential role in the pathogenesis of chronic diseases. Disrupting the Keap1-Nrf2 pathway by binding Keap1 is identified as a potential strategy to prevent oxidative stress-related chronic diseases. Therefore, of special interest is the utilization of dietary antioxidations from citrus, including narirutin, naringenin, hesperetin, hesperidin, naringin, neohesperidin dihydrochalcone, neohesperidin, and nobiletin, has been exploited as a prospective way to treat or prevent several human pathologies as Keap1-Nrf2 inhibitors for modulation of antioxidant properties. Methods To probe into the structural foundation of the molecular identification of citrus-derived antioxidations, we calculated the antioxidant responsive element activation ability of citrus-derived flavonoids after binding with Keap1. Also, the quantum chemistry properties and binding mode were performed theoretically with frontier molecular orbitals, molecular electrostatic potential analysis, molecular docking, and absorption, distribution, metabolism, excretion (ADME) calculation. Results and discussion Experimental findings combining computational assays revealed that the tested citrus-derived flavonoids can be grouped into strong agonists and weak agonists. The citrus-derived antioxidations were well housed in the bound zone of Keap1 via stable hydrogen bonding and hydrophobic interaction. Eventually, three of eight antioxidations were identified after ADME and physicochemical evaluations. The citrus-derived flavonoids were identified as potential dietary antioxidants of the Keap1-Nrf2 interaction, and can be used to improve oxidative stress-related chronic diseases.
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Affiliation(s)
- Tianzhu Guan
- School of Food Science and Engineering, Yangzhou University, Yangzhou, China
| | - Canfeng Bian
- School of Food Science and Engineering, Yangzhou University, Yangzhou, China
| | - Zheng Ma
- Department of Thoracic Surgery, Qilu Hospital of Shandong University, Jinan, China
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Mehla R, Gaurav K, Srivastava A, Singh S. Suitability of chlorobenzene-based single-electron transistor as HCN, AsH 3, and COCl 2 sensor. J Mol Model 2022; 28:206. [PMID: 35781845 DOI: 10.1007/s00894-022-05195-8] [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: 01/05/2022] [Accepted: 06/13/2022] [Indexed: 11/30/2022]
Abstract
A density functional theory (DFT)-based first principle approach has been employed to investigate the suitability of chlorobenzene-based single-electron transistor (SET) for the detection of few toxic gases such as hydrogen cyanide, arsine, and phosgene. The adsorption aspect of toxic gas molecules on the chlorobenzene with different orientations has been analyzed. The attributes such as charge density, molecular energy spectrum, density of states, and Mulliken population have been computed to scrutinize the effect of gas molecules on the surface of chlorobenzene. The sensing mechanism of adsorbate (toxic gases) with the adsorbent (chlorobenzene) has been authenticated in a single-electron transistor (SET) environment through total energy vs. gate voltage plot and charge stability diagram. The recovery time of the chlorobenzene-based SET gas sensor on the adsorption of HCN, AsH3, and COCl2 has been computed as 1.93 ns, 0.45 ns, and 36.31 ns, respectively. Based on these findings, it is interesting to see that the COCl2 gas molecule shows strong physical adsorption with the most significant adsorption distance (3.629 Å) with chlorobenzene, while AsH3-adsorbed chlorobenzene SET displays a low recovery time in comparison with other considered gases. The present analysis confirms a significantly better range of detection and improved recovery time using chlorobenzene-based single-electron transistor.
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Affiliation(s)
- Ravi Mehla
- Advanced Materials Research Group, CNT Laboratory, ABV-Indian Institute of Information Technology and Management, Gwalior, M.P, 474010, India
| | - Kumar Gaurav
- Advanced Materials Research Group, CNT Laboratory, ABV-Indian Institute of Information Technology and Management, Gwalior, M.P, 474010, India
| | - Anurag Srivastava
- Advanced Materials Research Group, CNT Laboratory, ABV-Indian Institute of Information Technology and Management, Gwalior, M.P, 474010, India.
| | - Sukhbir Singh
- Advanced Materials Research Group, CNT Laboratory, ABV-Indian Institute of Information Technology and Management, Gwalior, M.P, 474010, India
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Ra’il NH, Saputro AG, Ataollahi N, Ahmad A, Mobarak NN. The role of disaccharides as a plasticizer in improving the interaction between chitosan chain based solid polymer electrolytes (SPEs). NEW J CHEM 2022. [DOI: 10.1039/d1nj05735a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This study proved the potential of disaccharides as plasticisers for polymer electrolyte system-based chitosan as they can increase the flexibility of chitosan molecular chains, thus enhancing the conductivity and dissociation of ions.
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Affiliation(s)
- Nur Hani Ra’il
- Department of Chemical Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia
| | - Adhitya Gandaryus Saputro
- Advanced Functional Materials Research Group, Faculty of Industrial Technology, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung 40132, Indonesia
- Research Center for Nanosciences and Nanotechnology, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung 40132, Indonesia
| | - Narges Ataollahi
- Department of Civil, Environmental and Mechanical Engineering, University of Trento, Via Mesiano 77, 38123, Trento, Italy
| | - Azizan Ahmad
- Department of Chemical Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia
- Department of Physics, Faculty of Science and Technology, Universitas Airlangga, Campus Mulyorejo, Surabaya 60115, Indonesia
| | - Nadhratun Naiim Mobarak
- Department of Chemical Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia
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Dominguez AN, Emmert GE, Gil DM, Álvarez RMS. Experimental and theoretical vibrational study of the fungicide pyraclostrobin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 259:119888. [PMID: 34015601 DOI: 10.1016/j.saa.2021.119888] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 04/23/2021] [Accepted: 04/24/2021] [Indexed: 06/12/2023]
Abstract
The vibrational study of the pyraclostrobin (methyl N-(2-{[1-(4-chlorophenyl)-1H-pyrazol-3-yl]oxymethyl}phenyl) N-methoxycarbamate) molecule, a synthetic fungicide for agricultural uses, was performed. Pyraclostrobin belongs to the strobilurin family and acts by inhibiting the fungus respiratory chain at the level of Complex III, becoming an excellent agent for preventive, curative and eradicative activities against a wide range of fungal plant pathogens. However, its presence needs to be monitored to avoid the excessive and/or improper use that may compromise human or environmental health. The FTIR and Raman spectra of pyraclostrobin in pure solid state were recorded and compared with those obtained from both the substance in CH2Cl2 solution and in an agricultural commercial product (Comet® BASF). The spectral analysis was complemented with quantum-chemical calculations at the DFT level (B3LYP/6-311G*) for the predictions of the molecular geometry and its vibrational behavior. The high flexibility of the molecule was explored by performing potential energy scans on several dihedral angles and the results suggested that the main conformer of pyraclostrobin is that possessing the ortho-substituted benzene ring in perpendicular orientation regarding the plane that contains the ether group and the pyrazole ring, although the presence of a second preferred conformation in the experimental vibrational spectra was not ruled out. Among the many vibrational bands of pyraclostrobin that were well identified in the spectrum of the composite product for agricultural use, the one located at 936 cm-1 stood out. This signal was assigned to a vibration of the pyrazole ring and promised to be a good candidate as marker of the presence of the fungicide in complex matrixes.
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Affiliation(s)
- Alfredo Nicolás Dominguez
- Instituto de Química del Noroeste Argentino (INQUINOA), CONICET-UNT, Ayacucho 471, San Miguel de Tucumán, CP 4000 Tucumán, Argentina; Instituto de Química Orgánica, Facultad de Bioquímica, Química y Farmacia, UNT, Ayacucho 471, San Miguel de Tucumán, T4000INI Tucumán, Argentina
| | - Germán Ezequiel Emmert
- Instituto de Química Física, Facultad de Bioquímica, Química y Farmacia, UNT, San Lorenzo 456, San Miguel de Tucumán, T4000CAN Tucumán, Argentina
| | - Diego Mauricio Gil
- Instituto de Química Orgánica, Facultad de Bioquímica, Química y Farmacia, UNT, Ayacucho 471, San Miguel de Tucumán, T4000INI Tucumán, Argentina; Instituto de Biotecnología Farmacéutica y Alimentaria (INBIOFAL), CONICET-UNT, Av. Kirchner 1900, San Miguel de Tucumán, CP 4000 Tucumán, Argentina
| | - Rosa María Susana Álvarez
- Instituto de Química del Noroeste Argentino (INQUINOA), CONICET-UNT, Ayacucho 471, San Miguel de Tucumán, CP 4000 Tucumán, Argentina; Instituto de Química Física, Facultad de Bioquímica, Química y Farmacia, UNT, San Lorenzo 456, San Miguel de Tucumán, T4000CAN Tucumán, Argentina.
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Removal of chlorinated volatile organic compounds onto natural and Cu-modified zeolite: The role of chemical surface characteristics in the adsorption mechanism. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.118080] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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6
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A combined experimental and DFT computations study of novel (E)-3-(benzofuran-2-yl)-2-(thiophen-2-yl)acrylonitrile(TACNBNF): Insight into the synthesis, single crystal XRD, NMR, vibrational spectral analysis, in vitro antioxidant and in silico molecular docking investigation with human peroxiredoxin 5 protein. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2019.127241] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Acikses A, Hekim S, Oksuz F. Spectroscopic and electronic properties of a copolymer and its metal complexes: A theoretical and experimental study. Chem Phys 2019. [DOI: 10.1016/j.chemphys.2019.110469] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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8
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Madani S, Charef N, Hellal A, Garcia DL, Garcia MF, Arrar L, Mubarak MS. Synthesis, density functional theory studies, and sorption properties toward some divalent heavy metal ions of a new polystyrene‐supported 4‐(5‐mercapto‐1,3,4‐thiadiazol‐2‐ylimino) pentan‐2‐one polymer. J Appl Polym Sci 2019. [DOI: 10.1002/app.48289] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Salim Madani
- Laboratory of Applied BiochemistryUniversity Ferhat Abbas, Sétif 1, 19000 Algeria
- Département de génie des procédés, Faculté de technologieUniversité 20 aout 1955 Skikda 21000 Algeria
| | - Noureddine Charef
- Laboratory of Applied BiochemistryUniversity Ferhat Abbas, Sétif 1, 19000 Algeria
| | - Abdelkader Hellal
- Laboratoire d'Electrochimie des Matériaux Moléculaires et des ComplexesUniversité Ferhat Abbas de Sétif‐1,19000 Algeria
| | - Daniel L. Garcia
- Instituto de Ciencia y Tecnologia de Polimeros (Ictp‐Csic) C/Juan de la Cierva 3 28006 Madrid‐Espana
| | - Marta F. Garcia
- Instituto de Ciencia y Tecnologia de Polimeros (Ictp‐Csic) C/Juan de la Cierva 3 28006 Madrid‐Espana
| | - Lekhmici Arrar
- Laboratory of Applied BiochemistryUniversity Ferhat Abbas, Sétif 1, 19000 Algeria
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Benaka Prasad S, Naveen S, Ananda Kumar C, Lokanath N, Raghu A, Daraghmeh I, Reddy KR, Warad I. Synthesis, structural exploration, spectral and combinatorial analysis of racemic-3-isobutyl-5-phenyl-5-(pyridin-4-yl)imida-zolidine-2,4-dione: Comparison between experimental and DFT calculations. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.04.096] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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10
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Vennila P, Govindaraju M, Venkatesh G, Kamal C, Mary YS, Panicker CY, Kaya S, Armaković S, Armaković SJ. A complete computational and spectroscopic study of 2-bromo-1, 4-dichlorobenzene – A frequently used benzene derivative. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2017.09.049] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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11
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Sonochemical synthesis and DFT studies of nano novel Schiff base cadmium complexes: Green, efficient, recyclable catalysts and precursors of Cd NPs. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.06.049] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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12
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Paczkowska M, Mizera M, Dzitko J, Lewandowska K, Zalewski P, Cielecka-Piontek J. Vibrational (FT-IR, Raman) and DFT analysis on the structure of labile drugs. The case of crystalline tebipenem and its ester. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2016.12.074] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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13
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Nitrite-bonded nickel(II) complex of N-cyclohexyl-N-(2-pyridinylmethyl)amine; Synthesis, spectroscopic characterization, X-ray structure and DFT calculations. Polyhedron 2017. [DOI: 10.1016/j.poly.2016.12.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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14
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Al-Tamimi AMS. Electronic structure, hydrogen bonding and spectroscopic profile of a new 1,2,4-triazole-5(4H)-thione derivative: A combined experimental and theoretical (DFT) analysis. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2016.05.029] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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15
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Zhao H, Chang J, Du L. Effect of hydrogen bonding on the spectroscopic properties of molecular complexes with aromatic rings as acceptors. COMPUT THEOR CHEM 2016. [DOI: 10.1016/j.comptc.2016.03.029] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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16
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Sudha A, Srinivasan P, Thamilarasan V, Sengottuvelan N. Exploring the binding mechanism of 5-hydroxy-3',4',7-trimethoxyflavone with bovine serum albumin: Spectroscopic and computational approach. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2016; 157:170-181. [PMID: 26773261 DOI: 10.1016/j.saa.2015.12.028] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Revised: 12/16/2015] [Accepted: 12/20/2015] [Indexed: 06/05/2023]
Abstract
The current study was carried out to investigate the binding mechanism of a potential flavonoid compound 5-hydroxy-3',4',7-trimethoxyflavone (HTMF) with bovine serum albumin (BSA) using ultraviolet-visible, fluorescence, circular dichroism (CD) spectral measurements along with molecular docking and molecular dynamics (MD) simulation. It was confirmed from fluorescence spectra that the intrinsic fluorescence of BSA was robustly quenched by HTMF through a static quenching mechanism. The number of binding sites (n) for HTMF binding on BSA was found to be about one. The thermodynamic parameters estimated from the van't Hoff plot specified that hydrophobic force was the predominant force in the HTMF-BSA complex and there also exist hydrogen bonds and electrostatic interactions. The effect of HTMF on the BSA conformation examined using CD studies revealed that there is a decrease in the helical content of BSA upon HTMF interaction. The results of molecular docking study shed light on the binding mode which exposed that HTMF bind within the hydrophobic pocket of the subdomain IIIA of BSA. The stability of HTMF-BSA complex with respect to free protein was analyzed from the molecular dynamic studies. The electronic structure analysis of HTMF was achieved by using density functional theory (DFT) calculations at B3LYP/6-31G** level to support its antioxidant role. The results of computational analysis are in good consistence with the experimental data and the present findings suggested that HTMF exhibits a good binding propensity to BSA protein which will be helpful for the drug design.
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Affiliation(s)
- A Sudha
- Department of Bioinformatics, Alagappa University, Karaikudi 630 004, India
| | - P Srinivasan
- Department of Bioinformatics, Alagappa University, Karaikudi 630 004, India; Department of Animal Health and Management, Alagappa University, Karaikudi 630 004, India.
| | - V Thamilarasan
- Department of Industrial Chemistry, Alagappa University, Karaikudi 630 003, India
| | - N Sengottuvelan
- Department of Chemistry, Directorate of Distance Education, Alagappa University, Karaikudi 630 004, India
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17
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Shankar Rao Y, Prasad M, Udaya Sri N, Veeraiah V. Vibrational (FT-IR, FT-Raman) and UV–Visible spectroscopic studies, HOMO–LUMO, NBO, NLO and MEP analysis of Benzyl (imino (1H-pyrazol-1-yl) methyl) carbamate using DFT calculaions. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2015.12.008] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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18
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Asiri A, Karabacak M, Sakthivel S, Al-youbi A, Muthu S, Hamed S, Renuga S, Alagesan T. Synthesis, molecular structure, spectral investigation on (E)-1-(4-bromophenyl)-3-(4-(dimethylamino)phenyl)prop-2-en-1-one. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2015.08.047] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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19
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Arockia Doss M, Savithiri S, Rajarajan G, Thanikachalam V, Anbuselvan C. Synthesis, electronic structure investigation of 3-pentyl-2,6-di(furan-2-yl)piperidin-4-one by FT-IR, FT-Raman and UV-Visible spectral studies and ab initio/DFT calculations. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 151:773-784. [PMID: 26172464 DOI: 10.1016/j.saa.2015.07.024] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Revised: 07/02/2015] [Accepted: 07/03/2015] [Indexed: 06/04/2023]
Abstract
FT-IR and FT-Raman spectra of 3-pentyl-2,6-di(furan-2-yl) piperidin-4-one (3-PFPO) were recorded in the solid phase. The structural and spectroscopic analyses of 3-PFPO were made by using B3LYP/HF level with 6-311++G(d, p) basis set. The fundamental vibrations are assigned on the basis of the total energy distribution (TED) of the vibrational modes, calculated with scaled quantum mechanics (SQM) method and PQS program. Comparison of the observed fundamental vibrational frequencies of 3-PFPO with calculated results by HF and DFT methods indicates that B3LYP is superior to HF method for molecular vibrational problems. The electronic properties such as excitation energies, oscillator strength, wavelengths and HOMO-LUMO energies were obtained by time-dependent DFT (TD-DFT) approach. The polarizability and first order hyperpolarizability of the title molecule were calculated and interpreted. The hyperconjugative interaction energy (E((2))) and electron densities of donor (i) and acceptor (j) bonds were calculated using NBO analysis. In addition, MEP and atomic charges of carbon, nitrogen, oxygen and hydrogen were calculated using B3LYP/6-311++G(d, p) level theory. Moreover, thermodynamic properties (heat capacities, entropy and enthalpy) of the title compound at different temperatures were calculated in gas phase.
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Affiliation(s)
- M Arockia Doss
- Department of chemistry, Annamalai University, Annamalainagar 608 002, India
| | - S Savithiri
- Department of chemistry, Annamalai University, Annamalainagar 608 002, India
| | - G Rajarajan
- Department of chemistry, Annamalai University, Annamalainagar 608 002, India.
| | - V Thanikachalam
- Department of chemistry, Annamalai University, Annamalainagar 608 002, India
| | - C Anbuselvan
- Department of chemistry, Annamalai University, Annamalainagar 608 002, India
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Synthesis and characterization of Co(II), Ni(II), Cu(II) and Zn(II) complexes with a new homopiperazine macrocyclic Schiff base ligand. Inorganica Chim Acta 2015. [DOI: 10.1016/j.ica.2015.04.017] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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21
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Sayin K, Karakaş D, Karakuş N, Sayin TA, Zaim Z, Kariper SE. Spectroscopic investigation, FMOs and NLO analyses of Zn(II) and Ni(II) phenanthroline complexes: A DFT approach. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.01.047] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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22
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Muthu S, Elamuruguporchelvi E, Varghese A. DFT electronic structure calculations, spectroscopic studies, and normal coordinate analysis of 2-[(5-nitro-1,3-thiazol-2-yl)carbamoyl]phenyl acetate. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 138:743-752. [PMID: 25544190 DOI: 10.1016/j.saa.2014.11.035] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Revised: 11/03/2014] [Accepted: 11/20/2014] [Indexed: 06/04/2023]
Abstract
The solid phase FTIR and FT-Raman spectra of 2-[(5-nitro-1,3-thiazol-2-yl)carbamoyl]phenyl acetate (25N2LCPA) have been recorded 450-4000cm(-1) and 100-4000cm(-1) respectively. The normal coordinate analysis was carried out to confirm the precision of the assignments. DFT calculations have been performed giving energies, optimized structures, harmonic vibrational frequencies and IR intensities. The structure of the molecule was optimized and the structural characteristics were determined by density functional theory (DFT) using B3LYP method with 6-31+G(d,p) basis set. The detailed interpretation of the vibrational spectra has been carried out with aid of normal coordinate analysis (NCA) following the scaled quantum mechanical force field methodology. The Vibrational frequencies are calculated in the above method and are compared with experimental frequencies which yield good agreement between observed and calculated frequencies. Stability of the molecule arising from hyper conjugative interactions, charge delocalization has been analyzed using natural bond orbital (NBO) analysis. In addition, Frontiers molecular orbital and molecular electrostatic potential were computed by using Density Functional Theory (DFT) B3LYP/6-31+G(d,p) basis set. The calculated HOMO and LUMO energies show that charge transfer occurs in the molecule.
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Affiliation(s)
- S Muthu
- Department of Physics, Sri Venkateswara College of Engg, Sriperumbudur 602105, Tamil Nadu, India.
| | - E Elamuruguporchelvi
- Department of Physics, Kanchi Pallavan Engineering College, Kanchipuram 631502, Tamil Nadu, India
| | - Anitha Varghese
- Department of Chemistry, Christ University, Bangalore 560029, India
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Kumru M, Küçük V, Kocademir M, Alfanda HM, Altun A, Sarı L. Experimental and theoretical studies on IR, Raman, and UV-Vis spectra of quinoline-7-carboxaldehyde. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 134:81-89. [PMID: 25004899 DOI: 10.1016/j.saa.2014.06.094] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/14/2014] [Revised: 06/06/2014] [Accepted: 06/16/2014] [Indexed: 06/03/2023]
Abstract
Spectroscopic properties of quinoline-7-carboxaldehyde (Q7C) have been studied in detail both experimentally and theoretically. The FT-IR (4000-50 cm(-1)), FT-Raman (4000-50 cm(-1)), dispersive-Raman (3500-50 cm(-1)), and UV-Vis (200-400 nm) spectra of Q7C were recorded at room temperature (25 °C). Geometry parameters, potential energy surface about CCH(O) bond, harmonic vibrational frequencies, IR and Raman intensities, UV-Vis spectrum, and thermodynamic characteristics (at 298.15K) of Q7C were computed at Hartree-Fock (HF) and density functional B3LYP levels employing the 6-311++G(d,p) basis set. Frontier molecular orbitals, molecular electrostatic potential, and Mulliken charge analyses of Q7C have also been performed. Q7C has two stable conformers that are energetically very close to each other with slight preference to the conformer that has oxygen atom of the aldehyde away from the nitrogen atom of the quinoline.
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Affiliation(s)
- M Kumru
- Department of Physics, Faculty of Arts and Sciences, Fatih University, 34500 Istanbul, Turkey.
| | - V Küçük
- Department of Physics, Faculty of Arts and Sciences, Fatih University, 34500 Istanbul, Turkey
| | - M Kocademir
- Department of Physics, Faculty of Arts and Sciences, Fatih University, 34500 Istanbul, Turkey
| | - H M Alfanda
- Department of Physics, Faculty of Arts and Sciences, Fatih University, 34500 Istanbul, Turkey
| | - A Altun
- Department of Physics, Faculty of Arts and Sciences, Fatih University, 34500 Istanbul, Turkey
| | - L Sarı
- Department of Physics, Faculty of Arts and Sciences, Fatih University, 34500 Istanbul, Turkey
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Synthesis, molecular structure, theoretical calculation, DNA/protein interaction and cytotoxic activity of manganese(III) complex with 8-hydroxyquinoline. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2015; 142:220-31. [DOI: 10.1016/j.jphotobiol.2014.12.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2014] [Revised: 11/17/2014] [Accepted: 12/01/2014] [Indexed: 12/28/2022]
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25
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Sylvestre S, Sebastian S, Edwin S, Amalanathan M, Ayyapan S, Jayavarthanan T, Oudayakumar K, Solomon S. Vibrational spectra (FT-IR and FT-Raman), molecular structure, natural bond orbital, and TD-DFT analysis of L-Asparagine Monohydrate by Density Functional Theory approach. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 133:190-200. [PMID: 24945859 DOI: 10.1016/j.saa.2014.05.040] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Revised: 05/01/2014] [Accepted: 05/09/2014] [Indexed: 06/03/2023]
Abstract
In this work we report the vibrational spectral analysis of l-Asparagine Monohydrate (LAM) molecule by using FT-IR and FT-Raman spectroscopic techniques. The equilibrium geometry, harmonic vibrational wavenumbers, various bonding features have been computed using density functional B3LYP method with 6-311G(d,p) as basis set. Stability of the molecule arising from hyperconjugative interactions, charge delocalization have been analyzed using natural bond orbital (NBO) analysis. The results show that charge in electron density (ED) in σ(*) and π(*) antibonding orbitals and second order delocalization energies E((2)) confirms the occurrence of Intramolecular Charge Transfer (ICT) within the molecule. The energy and oscillator strength calculated by Time-Dependent Density Functional Theory (TD-DFT) complements with the experimental findings. The simulated spectra satisfactorily coincide with the experimental spectra.
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Affiliation(s)
- S Sylvestre
- Department of Chemistry, DMI-St. Eugene University, Chipata 511026, Zambia.
| | - S Sebastian
- Department of Physics (Science and Humanities), Sri Manakula Vinayagar Engg. College, Madagadipet, Puducherry 605 107, India
| | - S Edwin
- Department of Chemistry, DMI-St. Eugene University, Chipata 511026, Zambia
| | - M Amalanathan
- Department of Physics, Annai Velankanni College, Tholayavattam 629 157, Tamilnadu, India
| | - S Ayyapan
- Government College of Technology, Coimbatore 641 013, India
| | - T Jayavarthanan
- Department of Physics (Science and Humanities), Sri Manakula Vinayagar Engg. College, Madagadipet, Puducherry 605 107, India
| | - K Oudayakumar
- Department of Physics (Science and Humanities), Sri Manakula Vinayagar Engg. College, Madagadipet, Puducherry 605 107, India
| | - S Solomon
- Kavignareru Vanidasanar Government High School, Seliamedu, Puducherry 607402, India
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26
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Kontos AG, Likodimos V, Veziri CM, Kouvelos E, Moustakas N, Karanikolos GN, Romanos GE, Falaras P. CO2 captured in zeolitic imidazolate frameworks: Raman spectroscopic analysis of uptake and host-guest interactions. CHEMSUSCHEM 2014; 7:1696-1702. [PMID: 24687911 DOI: 10.1002/cssc.201301323] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2013] [Indexed: 06/03/2023]
Abstract
Zeolitic imidazolate frameworks (ZIFs) exhibit enhanced selectivity and increased CO2 uptake due to the incorporation of functional imidazolate units in their structure as well as their extensive porosity and ring flexibility. In situ Raman investigation of a representative host compound, ZIF-69, in practical CO2 pressure and temperature regimes (0-10 bar and 0-64 °C) correlates well with corresponding macroscopic CO2 sorption data and shows clear clear spectroscopic evidence of CO2 uptake. Significant positive shift of the 159 cm(-1) phenyl bending mode of the benzimidazole moiety indicates weak hydrogen bonding with CO2 in the larger cavities of the ZIF matrix. Raman spectroscopy is shown to be an easy and sensitive tool for quantifying CO2 uptake, identifying weak host-guest interactions and elucidating CO2 sorption mechanism in ZIFs.
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Affiliation(s)
- Athanassios G Kontos
- Institute of Advanced Materials, Physicochemical Processes, Nanotechnology, and Microsystems (IAMPPNM), National Centre for Scientific Research "Demokritos", P.O. BOX 60037, 153 10 Aghia Paraskevi Attikis (Greece)
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27
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Akçay HT, Bayrak R. Computational studies on the anastrozole and letrozole, effective chemotherapy drugs against breast cancer. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 122:142-152. [PMID: 24309175 DOI: 10.1016/j.saa.2013.11.028] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2013] [Revised: 11/05/2013] [Accepted: 11/06/2013] [Indexed: 06/02/2023]
Abstract
In this paper, computational studies were carried out on anastrozole and letrozole, chemotherapy drugs used against breast cancer. Optimization and frequency calculations were performed at B3LYP/6-31G (d) basis set and vibrational frequencies were assignment. Single point calculations were performed at DFT method with a hybrid functional B3LYP/6-311G (d, p) basis set. Theoretical NMR data were obtained at DFT method with a hybrid functional B3LYP/6-311G++ (2d, p) with GIAO (Gauge-Independent Atomic Orbital). IEF-PCM method was used as solvation model. NBO calculations were performed by the same basis set and calculation method with single point calculation. Global and localized reactivity parameters; fukui indices (f) chemical hardness (η), softness (S), chemical potential (μ), electronegativity (χ) and electrophilicity index (ω) were calculated. All computational parameters were compared with the experimental results obtained from the literature.
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Affiliation(s)
- Hakki Türker Akçay
- Department of Chemistry, Faculty of Art and Science, Recep Tayyip Erdoğan University, 53100 Rize, Turkey.
| | - Riza Bayrak
- Department of Chemistry, Faculty of Art and Science, Sinop University, 57000 Sinop, Turkey
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28
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Alam MJ, Ahmad S. Molecular structure, anharmonic vibrational analysis and electronic spectra of o-, m-, p-iodonitrobenzene using DFT calculations. J Mol Struct 2014. [DOI: 10.1016/j.molstruc.2013.12.002] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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29
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Ghalla H, Issaoui N, Govindarajan M, Flakus H, Jamroz M, Oujia B. Spectroscopic and molecular structure investigation of 2-furanacrylic acid monomer and dimer using HF and DFT methods. J Mol Struct 2014. [DOI: 10.1016/j.molstruc.2013.11.037] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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30
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Muthu S, Elamurugu Porchelvi E. FTIR, FT-RAMAN, NMR, spectra, normal co-ordinate analysis, NBO, NLO and DFT calculation of N,N-diethyl-4-methylpiperazine-1-carboxamide molecule. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 115:275-286. [PMID: 23845985 DOI: 10.1016/j.saa.2013.06.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2013] [Revised: 05/24/2013] [Accepted: 06/04/2013] [Indexed: 06/02/2023]
Abstract
The Fourier Transform Infrared (FT-IR) and FT-Raman of N,N-diethyl-4-methylpiperazine-1-carboxamide (NND4MC) have been recorded and analyzed. The structure of the compound was optimized and the structural characteristics were determined by density functional theory (DFT) using B3LYP method with 6-31G(d,p) and 6-311G(d,p) basis sets. The difference between the observed and scaled wavenumber values of most of the fundamentals is very small. The theoretically predicted FT-IR and FT-Raman spectra of the title molecule have been constructed. The detailed interpretation of the vibrational spectra has been carried out with aid of normal coordinate analysis (NCA) following the scaled quantum mechanical force field methodology. Stability of the molecule arising from hyperconjugative interactions and charge delocalization has been analyzed using natural bond orbital (NBO) analysis. The results show that electron density (ED) in the σ(*) and π(*) antibonding orbitals and second order delocalization energies (E2) confirm the occurrence of intramolecular charge transfer (ICT) within the molecule. The electronic dipole moment (μD) and the first hyperpolarizability (βtot) values of the investigated molecule were computed using Density Functional Theory (DFT/B3LYP) with 6-31G(d,p) and 6-311G(d,p) basis sets. The calculated results also show that the NND4MC molecule may have microscopy nonlinear optical (NLO) behavior with non zero values. Mulliken atomic charges of NND4MC were calculated. The (13)C nuclear magnetic resonance (NMR) chemical shifts of the molecule were calculated by the gauge independent atomic orbital (GIAO) method and compared with experimental results. The UV-Vis spectrum of the compound was recorded. The theoretical electronic absorption spectra have been calculated by using CIS, TD-DFT methods. A study on the electronic properties, such as HOMO and LUMO energies, molecular electrostatic potential (MEP) were also performed.
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Affiliation(s)
- S Muthu
- Department of Physics, Sri Venkateswara College of Engineering, Sriperumbudur 602 105, Tamil Nadu, India.
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31
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Huang H, Zhu X, Su L, Wang H, Yang Y. Effect of temperature on self-assembly/disassembly transition of dialkylurea supramolecular gels at high pressure. RSC Adv 2013. [DOI: 10.1039/c3ra41540f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
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32
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Alam MJ, Ahmad S. Anharmonic vibrational studies of L-aspartic acid using HF and DFT calculations. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 96:992-1004. [PMID: 22939282 DOI: 10.1016/j.saa.2012.07.135] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2012] [Revised: 07/20/2012] [Accepted: 07/26/2012] [Indexed: 06/01/2023]
Abstract
The experimental and theoretical studies on the structure, molecular properties and vibrational spectra of L-aspartic acid are presented. The molecular structure, harmonic and anharmonic vibrational frequencies, molecular properties, MEP mapping, NBO analysis and electronic spectra of L-aspartic acid have been reported. Computed geometrical parameters and anharmonic frequencies of fundamental, combination and overtone transitions were found in satisfactory agreement with the experimental data. The UV-Vis spectrum of present molecule has been recorded and the electronic properties such as HOMO and LUMO energies and few low lying excited states were carried out by using time dependent density functional theory (TD-DFT) approach. Natural Bond Orbital (NBO) analysis has been performed for analyzing charge delocalization throughout the molecule. Molecular electrostatic potential map has also been used for quantitative measure of the chemical activities of various sites of the molecule.
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Affiliation(s)
- Mohammad Jane Alam
- Department of Physics, Aligarh Muslim University, Aligarh 202 002, India
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