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Zouaghi MO, Bensalah D, Hassen S, Arfaoui Y, Mansour L, Özdemir N, Bülbül H, Gurbuz N, Özdemir I, Hamdi N. Benzimidazole derivatives as a new scaffold of anticancer agents: Synthesis, optical properties, crystal structure and DFT calculations. Heliyon 2024; 10:e32905. [PMID: 39022063 PMCID: PMC11252883 DOI: 10.1016/j.heliyon.2024.e32905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2024] [Revised: 06/03/2024] [Accepted: 06/11/2024] [Indexed: 07/20/2024] Open
Abstract
The absolute necessity to fight some class of tumour is perceived as serious health concerns, and the discovery and development of effective anticancer agents are urgently needed. So, the novel benzimidazole derivatives (2a-b) were designed, synthesized, with their structures rigorously characterized using single X-ray crystallography, FT-IR, UV, and NMR spectroscopy, alongside elemental analysis. The geometric structures were optimized using density functional theory (DFT) calculations performed at the ωB97X-D/cc-pVDZ level, yielding good agreement with experimental XRD data. The studied salt complexes exhibited the ability to absorb UV light at 275 nm. Furthermore, anticancer activity of the compounds was screened against (MDA-MB-231, MCF-7, HT-29 and healthy cell line (HF)) and revealed the remarkable efficacy of select newly synthesized Benzimidazole derivatives (2a-b). Compound 2a showed relative significant higher cytotoxicity (165.02) in MDA-MB-231 cancer cell line. This underscores their promising potential in therapeutic applications, affirming their role as valuable contenders in the pursuit of novel anticancer agents.
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Affiliation(s)
- Mohamed Oussama Zouaghi
- Laboratory of Characterizations, Applications & Modeling of Materials (LR18ES08), Department of Chemistry, Faculty of Sciences of Tunis, University of Tunis El Manar, 2092, Tunisia
| | - Donia Bensalah
- Research Laboratory of Environmental Sciences and Technologies (LR16ES09), Higher Institute of Environmental Sciences and Technology, University of Carthage, Hammam-Lif, Tunisia
| | - Sabri Hassen
- Laboratory of Characterizations, Applications & Modeling of Materials (LR18ES08), Department of Chemistry, Faculty of Sciences of Tunis, University of Tunis El Manar, 2092, Tunisia
| | - Youssef Arfaoui
- Laboratory of Characterizations, Applications & Modeling of Materials (LR18ES08), Department of Chemistry, Faculty of Sciences of Tunis, University of Tunis El Manar, 2092, Tunisia
| | - Lamjed Mansour
- Zoology Department, College of Science, King Saud University, Saudi Arabia, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Namık Özdemir
- Department of Physics, Faculty of Science, Ondokuz Mayıs University, 55139, Samsun, Turkey
| | - Hakan Bülbül
- Department of Physics, Faculty of Science, Ondokuz Mayıs University, 55139, Samsun, Turkey
| | - Nevin Gurbuz
- İnönü University, Faculty of Science and Art, Department of Chemistry, Malatya, 44280, Turkey
- İnönü University, Catalysis Research and Application Center, Malatya, 44280, Turkey
| | - Ismail Özdemir
- İnönü University, Faculty of Science and Art, Department of Chemistry, Malatya, 44280, Turkey
- İnönü University, Catalysis Research and Application Center, Malatya, 44280, Turkey
| | - Naceur Hamdi
- Research Laboratory of Environmental Sciences and Technologies (LR16ES09), Higher Institute of Environmental Sciences and Technology, University of Carthage, Hammam-Lif, Tunisia
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2
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Eno EA, Cheng CR, Louis H, Gber TE, Emori W, Ita IAT, Unimke TO, Ling L, Adalikwu SA, Agwamba EC, Adeyinka AS. Investigation on the molecular, electronic and spectroscopic properties of rosmarinic acid: an intuition from an experimental and computational perspective. J Biomol Struct Dyn 2023; 41:10287-10301. [PMID: 36546691 DOI: 10.1080/07391102.2022.2154841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Accepted: 11/25/2022] [Indexed: 12/24/2022]
Abstract
Various drugs such as corticosteroids, salbutamol, and β2 agonist are available for the treatment of asthma an inflammatory disease and its symptoms, although the ingredient and the mode of action of these drugs are not clearly elucidated. Hence this research aimed at carrying out improved scientific research with respect to the use of natural product rosmarinic acid which poses minima, side effects. Herein, we first carried out extraction, isolation, and spectroscopic (FT-IR, 1H-NMR and 13C-NMR) investigation, followed by molecular modeling analysis on the naturally occurring rosmarinic acid extracted from Rosmarinus officinalis. A detailed comparison of the experimental and theoretical vibrational analysis has been carried out using five DFT functionals: BHANDH, HSEH1PBE, M06-2X, MPW3PBE and THCTHHYB with the basis set 6-311++G (d, p) to investigate into the structural, reactivity, and stability of the isolated compound. Frontier molecular orbital analysis and appropriate quantum descriptors were calculated. Results showed that the compound was more stable at M06-2X and more reactive at HSEH1PBE with an energy gap of 6.43441 eV and 3.8047 eV, respectively, which was later affirmed by the global quantum reactivity parameters. From natural bond orbital analysis, π* → π* is the major contributor to electron transition with the summation perturbation energy of 889.57 kcal/mol, while π → π* had the perturbation energy totaling of 145.3 kcal/mol. Geometry analysis shows BHANDH to have lower bond length values and lesser deviation from 120° in carbon-carbon angle. The potency of the title molecule as an asthma drug was tested via a molecular docking approach and the binding score of -8.2 kcal/mol was observed against -7.0 of salbutamol standard drug, suggesting romarinic acid as a potential natural organic treatment for asthma.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Ededet A Eno
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
| | - Chun-Ru Cheng
- Key Laboratory of Material Corrosion and Protection of Sichuan Province, Zigong, Sichuan, PR China
- College of Chemical Engineering, Institute of Pharmaceutical Engineering Technology and Application, Key Laboratory of Green Chemistry of Sichuan Institutes of Higher Education, Sichuan University of Science & Engineering, Zigong, Sichuan, PR China
| | - Hitler Louis
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
| | - Terkumbur E Gber
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
| | - Wilfred Emori
- Key Laboratory of Material Corrosion and Protection of Sichuan Province, Zigong, Sichuan, PR China
- School of Materials Science and Engineering, Sichuan University of Science and Engineering, Zigong, Sichuan, PR China
| | - Ima-Abasi T Ita
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
| | - Tomsmith O Unimke
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar, Nigeria
| | - Liu Ling
- College of Chemical Engineering, Institute of Pharmaceutical Engineering Technology and Application, Key Laboratory of Green Chemistry of Sichuan Institutes of Higher Education, Sichuan University of Science & Engineering, Zigong, Sichuan, PR China
| | - Stephen A Adalikwu
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
| | - Ernest C Agwamba
- Computational and Bio-Simulation Research Group, University of Calabar, Calabar, Nigeria
- Department of Chemistry, Covenant University Ota, Ota, Nigeria
| | - Adedapo S Adeyinka
- Research Centre for Synthesis and Catalysis, Department of Chemical sciences, University of Johannesburg, Johannesburg, South Africa
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3
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Afahanam LE, Louis H, Benjamin I, Gber TE, Ikot IJ, Manicum ALE. Heteroatom (B, N, P, and S)-Doped Cyclodextrin as a Hydroxyurea (HU) Drug Nanocarrier: A Computational Approach. ACS OMEGA 2023; 8:9861-9872. [PMID: 36969463 PMCID: PMC10035006 DOI: 10.1021/acsomega.2c06630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Accepted: 12/20/2022] [Indexed: 06/18/2023]
Abstract
Theoretical examination of hydroxyurea adsorption capabilities toward the cyclodextrin surface for proper drug delivery systems was carried out utilizing DFT simulations. The study aims to assess the efficacy of doped cyclodextrin (doped with boron, nitrogen, phosphorus, and sulfur atoms) in increasing its stability and efficiency in intermolecular interactions, hence facilitating optimal drug delivery. The adsorption energies were found to follow a decreasing order of B@ACD-HU>N@ACD-HU>P@ACD-HU>S@ACD-HU with energies of -0.046, -0.0326, -0.015, and 0.944 kcal/mol, respectively. The S@ACD-HU complex, unlike previous systems, had a physical adsorption energy. The N@ACD-HU and B@ACD-HU complexes had the shortest bond lengths of 1.42 Å (N122-C15) and 1.54 Å (B126-C15), respectively. The HOMO and LUMO values were also high in identical systems, -6.367 and -2.918 eV (B@ACD-HU) and -6.278 and -1.736 eV (N@ACD-HU), respectively, confirming no chemical interaction. The N@ACD-HU has the largest energy gap of 4.54 eV. For the QTAIM analysis and plots, the maximum electron density and ellipticity index were detected in B@ACD-HU, 0.600 au (H70-N129) and 0.8685 au (H70-N129), respectively, but N@ACD-HU exhibited a high Laplacian energy of 0.7524 a.u (H133-N122). The fragments' TDOS, OPDOS, and PDOS exhibited a strong bond interaction of greater than 1, and they had different Fermi levels, with the highest value of -8.16 eV in the N@ACD-HU complex. Finally, the NCI analysis revealed that the complexes were noncovalent. According to the literature, the van der Waals form of interactions is used in the intermolecular forces of cyclodextrin cavities. The B@ACD-HU and N@ACD-HU systems were more greenish in color with no spatial interaction. These two systems have outperformed other complexes in intermolecular interactions, resulting in more efficient drug delivery. They had the highest negative adsorption energies, the shortest bond length, the highest HOMO/LUMO energies, the highest energy gap, the highest stabilization energy, the strongest bonding effect, the highest electron density, the highest ellipticity index, and a strong van der Waals interaction that binds the drug and the surface together.
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Affiliation(s)
- Lucy E. Afahanam
- Computational
and Bio-Simulation Research Group, University
of Calabar, Calabar P.M.B 1115, Nigeria
| | - Hitler Louis
- Computational
and Bio-Simulation Research Group, University
of Calabar, Calabar P.M.B 1115, Nigeria
- Department
of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar P.M.B 1115, Nigeria
| | - Innocent Benjamin
- Computational
and Bio-Simulation Research Group, University
of Calabar, Calabar P.M.B 1115, Nigeria
- Department
of Microbiology, Faculty of Biological Sciences, University of Calabar, Calabar P.M.B 1115, Nigeria
| | - Terkumbur E. Gber
- Computational
and Bio-Simulation Research Group, University
of Calabar, Calabar P.M.B 1115, Nigeria
- Department
of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar P.M.B 1115, Nigeria
| | - Immaculata J. Ikot
- Computational
and Bio-Simulation Research Group, University
of Calabar, Calabar P.M.B 1115, Nigeria
- Department
of Pure and Applied Chemistry, Faculty of Physical Sciences, University of Calabar, Calabar P.M.B 1115, Nigeria
| | - Amanda-Lee E. Manicum
- Department
of Chemistry, Tshwane University of Technology, Pretoria 0183, South Africa
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Thamarai A, Raja M, Sakthivel S, Kumaran S, Muthu S, Narayana B, Ramesh P, Sevvanthi S, Javed S, Naick BN, Irfan A. The chemical reactivity and antimalarial investigation of crystal structure (2E)-3-(biphenyl-4-yl)-1-(4-chlorophenyl)prop-2-en-1-one and hydroxyphenyl, nitrophenyl substituted chalcone derivative molecules. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2023.135001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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5
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Elkaeed EB, Mughal EU, Kausar S, Al-ghulikah HA, Naeem N, Altaf AA, Sadiq A. Theoretical vibrational spectroscopy (FT-IR), PED and DFT calculations of chromones and thiochromones. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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6
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Structural characterization, molecular docking assessment, drug-likeness study and DFT investigation of 2-(2-{1,2-dibromo-2-[3-(4-chloro-phenyl)-[1,2,4]oxadiazol-5-yl]-2-fluoro-ethyl1}-phenyl)-methyl 3-methoxy-acrylic ester. J INDIAN CHEM SOC 2022. [DOI: 10.1016/j.jics.2022.100745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Bravanjalin Subi E, Arul Dhas D, Balachandran S, Hubert Joe I. Crystal Growth, Structural, Vibrational, Effects of Hydrogen Bonding(C-H…O and C-H…N), Chemical Reactivity, Antimicrobial Activity, Inhibitory Effects and Molecular Dynamic Simulation of 4-Methoxy-N-(Nitrobenzylidene)-Aniline. Polycycl Aromat Compd 2022. [DOI: 10.1080/10406638.2022.2052116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- E. Bravanjalin Subi
- Manonmaniam Sundaranar University, Abishekapatti, Tirunelveli, Tamil Nadu, India
- Department of Physics, Research Centre, Nesamony Memorial Christian College, Marthandam, Tamil Nadu, India
| | - D. Arul Dhas
- Department of Physics, Research Centre, Nesamony Memorial Christian College, Marthandam, Tamil Nadu, India
| | - S. Balachandran
- Department of Chemistry, NSS College Ottapalam, Palakad, Kerala, India
| | - I. Hubert Joe
- Centre for Molecular and Biophysics Research, Department of Physics, Mar Ivanios College, Thiruvanathapuram, Kerala, India
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8
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Experimental and theoretical Fourier transform infrared and Raman spectroscopy, density functional theory, antibacterial activity and molecular docking studies on 1-(4-methoxyphenyl)-1H-imidazole. CHEMICAL PAPERS 2022. [DOI: 10.1007/s11696-021-02017-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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9
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Moreno-Fuquen R, Hincapié-Otero MM, Becerra D, Castillo JC, Portilla J, Macías MA. Synthesis of 1-aroyl-3-methylsulfanyl-5-amino-1,2,4-triazoles and their analysis by spectroscopy, X-ray crystallography and theoretical calculations. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129317] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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10
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Finšgar M. Surface analysis and interface properties of 2-aminobenzimidazole corrosion inhibitor for brass in chloride solution. Anal Bioanal Chem 2020; 412:8431-8442. [DOI: 10.1007/s00216-020-02981-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 09/23/2020] [Accepted: 09/30/2020] [Indexed: 10/23/2022]
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11
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Synthesis, conformational studies, vibrational spectra and thermal properties, of new 1,4-(phenylenebis(methylene) bis(methyl-imidazolium) ionic liquids. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2020.128731] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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12
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Adole VA, Jagdale BS, Pawar TB, Sawant AB. Experimental and theoretical exploration on single crystal, structural, and quantum chemical parameters of (
E
)‐7‐(arylidene)‐1,2,6,
7‐tetrahydro‐8
H
‐indeno[5,4‐
b
]furan‐8‐one derivatives: A comparative study. J CHIN CHEM SOC-TAIP 2020. [DOI: 10.1002/jccs.202000006] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Vishnu A. Adole
- Department of Chemistry Mahatma Gandhi Vidyamandir's Loknete Vyankatrao Hiray Arts, Science and Commerce College Panchavati (Affiliated to SP Pune University, Pune) Nashik India
- Department of Chemistry Mahatma Gandhi Vidyamandir's Arts, Science and Commerce College (Affiliated to SP Pune University, Pune) Manmad India
| | - Bapu S. Jagdale
- Department of Chemistry Mahatma Gandhi Vidyamandir's Loknete Vyankatrao Hiray Arts, Science and Commerce College Panchavati (Affiliated to SP Pune University, Pune) Nashik India
- Department of Chemistry Mahatma Gandhi Vidyamandir's Arts, Science and Commerce College (Affiliated to SP Pune University, Pune) Manmad India
| | - Thansing B. Pawar
- Department of Chemistry Mahatma Gandhi Vidyamandir's Loknete Vyankatrao Hiray Arts, Science and Commerce College Panchavati (Affiliated to SP Pune University, Pune) Nashik India
| | - Arun B. Sawant
- Department of Chemistry Maharaja Sayajirao Gaikwad Arts, Science and Commerce College (Affiliated to SP Pune University, Pune) Malegaon Camp India
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Elangovan K, Boobalan MS, Senthil A, Vinitha G. Investigation on growth, structural, characterization and DFT computing of imidazolium 3-nitrobenzoate (I3NB) single crystal – Towards third order nonlinear optical applications. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.07.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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14
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The Corrosion Inhibition of AA6082 Aluminium Alloy by Certain Azoles in Chloride Solution: Electrochemistry and Surface Analysis. COATINGS 2019. [DOI: 10.3390/coatings9060380] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The corrosion inhibition effect of five azole compounds on the corrosion of an AA6082 aluminium alloy in 5 wt.% NaCl solution at 25 and 50 °C was investigated using weight loss and electrochemical measurements. Only 2-mercaptobenzothiazole (MBT) showed a corrosion inhibition effect at both temperatures and was further studied in detail, including with the addition of potassium iodide as a possible intensifier. Surface analysis of the MBT surface layer was performed by means of attenuated total reflectance Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and time-of-flight secondary ion mass spectrometry techniques. The hydrophobicity of the MBT surface layer was also investigated.
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15
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Synthesis, thermal stability, vibrational spectra and conformational studies of novel dicationic meta-xylyl linked bis-1-methylimidazolium ionic liquids. J Mol Struct 2019. [DOI: 10.1016/j.molstruc.2019.03.019] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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16
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Hillman F, Jeong HK. Linker-Doped Zeolitic Imidazolate Frameworks (ZIFs) and Their Ultrathin Membranes for Tunable Gas Separations. ACS APPLIED MATERIALS & INTERFACES 2019; 11:18377-18385. [PMID: 31046223 DOI: 10.1021/acsami.9b02114] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Zeolitic imidazolate frameworks (ZIFs) have gained much interest due to their potentials in gas separations. A hybrid approach by mixing metals and/or linkers has been recently investigated to fine-tune the ZIF framework porosity and surface properties and potentially extending their separation applications for many important gas mixtures. In general, the hybrid approach requires mixing of isostructural ZIFs to maintain their topology, thus limiting the options of linkers and metal centers to obtain hybrid ZIFs. Linker-doping, as reported here, can be a strategy to expand the option of imidazolate linkers to obtain mixed-linker hybrid ZIFs. Two linkers are investigated to be doped into the ZIF-8 framework: 2-ethylimidazole (eIm) and 2-phenylimidazole (phIm). The linker-doping strategy is shown to tune the "stiffness" of Zn-N bonding as characterized by FT-IR, thereby the linker flip-flopping motion of ZIF-8, which is analyzed through gas adsorption isotherms. Furthermore, well-intergrown ultrathin eIm-doped ZIF-8 membranes are grown on α-Al2O3 substrates, in which the incorporation of eIm affects the morphology and thickness of the polycrystalline membranes, improving the permeance of propylene and propane molecules.
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Malarkodi H, Saminathan M, Ezhilarasi R, Murugan D, Ponnuswamy A. Molecular Structure, Spectral, Electronic and Thermodynamic, First-Order Hyperpolarizability, NBO and Molecular Docking Studies of Novel Acenaphthylene Pyrrolidine Derivative. ChemistrySelect 2018. [DOI: 10.1002/slct.201802535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Helda Malarkodi
- Department of Physics; Research Scholar in Bharathiar University, Coimbatore; Tamil Nadu India
| | - Murugavel Saminathan
- Department of Physics; Thanthai Periyar Government Institute of Technology; Vellore 632 002 Tamil Nadu India
| | | | - Dinesh Murugan
- Department of Organic Chemistry; Madurai Kamaraj University; Madurai- 625021 Tamilnadu India
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18
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Helda Malarkodi J, Murugavel S, Rosaline Ezhilarasi J, Dinesh M, Ponnuswamy A. Structure investigation, spectral characterization, electronic properties, and antimicrobial and molecular docking studies of 3′-(1-benzyl-5-methyl-1 H
-1,2,3-triazole-4-carbonyl)-1′-methyl-4′-phenyl-2 H
-spiro[acenaphthylene-1,2′-pyrrolidine]-2-one. J CHIN CHEM SOC-TAIP 2018. [DOI: 10.1002/jccs.201800128] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
| | - Saminathan Murugavel
- Department of Physics; Thanthai Periyar Government Institute of Technology; Vellore Tamil Nadu India
| | | | - Murugan Dinesh
- Department of Organic Chemistry, School of Chemistry; Madurai Kamaraj University; Madurai Tamil Nadu India
| | - Alagusundaram Ponnuswamy
- Department of Organic Chemistry, School of Chemistry; Madurai Kamaraj University; Madurai Tamil Nadu India
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19
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Electrochemical and Surface Analysis of 2-Phenylimidazole Adsorbed on Copper from Chloride Solution. COATINGS 2018. [DOI: 10.3390/coatings8070234] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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20
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Demircioğlu Z, Yeşil AE, Altun M, Bal-Demirci T, Özdemir N. X-ray structure determination, Hirshfeld surface analysis, spectroscopic (FT-IR, NMR, UV–Vis, fluorescence), non-linear optical properties, Fukui function and chemical activity of 4′-(2,4-dimethoxyphenyl)-2,2′:6′,2″-terpyridine. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.02.093] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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21
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Haddad B, Paolone A, Villemin D, Lohier JF, Drai M, Bresson S, Abbas O, Belarbi EH. para‑Xylyl bis‑1‑methylimidazolium bis(trifluoromethanesulfonyl)imide: Synthesis, crystal structure, thermal stability, vibrational studies. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.03.113] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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22
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Demircioğlu Z, Özdemir FA, Dayan O, Şerbetçi Z, Özdemir N. Synthesis, X-ray diffraction method, spectroscopic characterization (FT-IR, 1H and 13C NMR), antimicrobial activity, Hirshfeld surface analysis and DFT computations of novel sulfonamide derivatives. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.02.063] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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23
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Bai Y, Lv X, Liu Z, Guo T, Li J. Synthesis, spectral and DFT study of 5-butyl-3,9-difluoro-5 H -benzimidazo[1,2- a ]benzimidazole. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2017.08.102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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24
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Haddad B, Paolone A, Villemin D, Taqiyeddine M, Belarbi EH, Bresson S, Rahmouni M, Dhumal NR, Kim HJ, Kiefer J. Synthesis, conductivity, and vibrational spectroscopy of tetraphenylphosphonium bis(trifluoromethanesulfonyl)imide. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.05.138] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Hachuła B, Polasz A, Książek M, Kusz J, Starczewska O, Pisarski W. Spectroscopic and thermal studies on 2- and 4-phenyl-1H-imidazoles. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 183:378-386. [PMID: 28460318 DOI: 10.1016/j.saa.2017.04.062] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2017] [Revised: 04/11/2017] [Accepted: 04/20/2017] [Indexed: 06/07/2023]
Abstract
The polarized IR spectra of isotopically neat and isotopically substituted monocrystalline samples of 2-phenyl-1H-imidazole (2PI) and 4-phenyl-1H-imidazole (4PI) were recorded at two temperatures of 293 K and 77 K. The room-temperature ATR-FTIR and Raman spectra of 2PI and two polymorphic forms of 4PI were also recorded. Theoretical analysis of the vibrational spectra of selected imidazole derivatives reflected similar characteristics of their hydrogen-bond networks and allowed us to obtain the information about the mechanism of the H/D isotopic "self-organization" phenomenon. The distribution of protons and deuterons in the lattices of the isotopically diluted crystalline samples of 2PI and 4PI was found to be non-random. In the crystals of the hydrogen- and deuterium-bonded imidazole derivatives the strongest vibrational exciton interactions favored the intrachain ("tail-to-head")-type exciton coupling widespread at 77 K via the π-electrons. At room temperature a weak interchain ("through-space")-type exciton coupling was also partially responsible for the IR spectra generation. Differential scanning calorimetry (DSC) measurements showed that the two polymorphic forms of 4PI exhibit an extensive supercooling of crystallization process and cold crystallization on reheating. Additionally, both polymorphic modifications of 4PI are monotropically related. 2PI exhibits only the crystallization and melting processes.
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Affiliation(s)
- Barbara Hachuła
- Institute of Chemistry, University of Silesia, Szkolna 9, 40-006 Katowice, Poland.
| | - Anna Polasz
- Institute of Chemistry, University of Silesia, Szkolna 9, 40-006 Katowice, Poland
| | - Maria Książek
- Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
| | - Joachim Kusz
- Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
| | - Oliwia Starczewska
- Institute of Materials Science, University of Silesia, 75 Pułku Piechoty 1a, 41-500 Chorzów, Poland
| | - Wojciech Pisarski
- Institute of Chemistry, University of Silesia, Szkolna 9, 40-006 Katowice, Poland
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Synthesis, spectroscopic (FT-IR, FT-Raman, NMR, UV–Visible), NLO, NBO, HOMO-LUMO, Fukui function and molecular docking study of (E)-1-(5-bromo-2-hydroxybenzylidene)semicarbazide. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.03.117] [Citation(s) in RCA: 97] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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27
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Murugavel S, Vetri velan V, Kannan D, Bakthadoss M. Synthesis of a novel methyl(2E)-2-{[N-(2-formylphenyl)(4-methylbenzene) sulfonamido]methyl}-3-(2-methoxyphenyl)prop-2-enoate: Molecular structure, spectral, antimicrobial, molecular docking and DFT computational approaches. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2016.08.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Murugavel S, Vetri velan V, Kannan D, Bakthadoss M. Experimental and computational approaches of a novel methyl (2E)-2-{[N-(2-formylphenyl)(4-methylbenzene)sulfonamido]methyl}-3-(4-chlorophenyl)prop-2-enoate: A potential antimicrobial agent and an inhibition of penicillin-binding protein. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2016.02.084] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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29
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Murugavel S, Vetri Velan V, Kannan D, Bakthadoss M. Synthesis, crystal structure analysis, spectral investigations, DFT computations, Biological activities and molecular docking of methyl(2E)-2-{[N-(2-formylphenyl)(4-methylbenzene) sulfonamido]methyl}-3-(4-fluorophenyl)prop-2-enoate, a potential bioactive agent. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2015.11.047] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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30
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Vibrational assignments, spectroscopic investigation (FT-IR and FT-Raman), NBO, MEP, HOMO‒LUMO analysis and intermolecular hydrogen bonding interactions of 7-fluoroisatin, 7-bromoisatin and 1-methylisatin ‒ A comparative study. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2015.08.033] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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31
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Theoretical investigation of the substituent effects on the electronic and optical properties of 6-substituted coumarin derivatives. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2015.02.036] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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32
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Ma H, Fei J, Li Q, Li J. Photo-induced reversible structural transition of cationic diphenylalanine peptide self-assembly. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2015; 11:1787-1791. [PMID: 25405602 DOI: 10.1002/smll.201402140] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2014] [Revised: 10/16/2014] [Indexed: 06/04/2023]
Abstract
The photo-induced self-assembly of a cationic diphenylalanine peptide (CDP) is investigated using a photoswitchable sulfonic azobenzene as the manipulating unit. A reversible structural transition between a branched structure and a vesicle-like structure is observed by alternating between UV and visible light irradiation.
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Affiliation(s)
- Hongchao Ma
- Beijing National Laboratory for Molecular Sciences, CAS Key Lab of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, PR China
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Uma Maheswari J, Muthu S, Sundius T. QM/MM methodology, docking and spectroscopic (FT-IR/FT-Raman, NMR, UV) and Fukui function analysis on adrenergic agonist. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 137:841-855. [PMID: 25277632 DOI: 10.1016/j.saa.2014.07.095] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Revised: 07/09/2014] [Accepted: 07/29/2014] [Indexed: 06/03/2023]
Abstract
The Fourier transform infrared, FT-Raman, UV and NMR spectra of Ternelin have been recorded and analyzed. Harmonic vibrational frequencies have been investigated with the help of HF with 6-31G (d,p) and B3LYP with 6-31G (d,p) and LANL2DZ basis sets. The (1)H and (13)C nuclear magnetic resonance (NMR) chemical shifts of the molecule were calculated by GIAO method. The polarizability (α) and the first hyperpolarizability (β) values of the investigated molecule have been computed using DFT quantum mechanical calculations. Stability of the molecule arising from hyper conjugative interactions, and charge delocalization has been analyzed using natural bond orbital (NBO) analysis. The electron density-based local reactivity descriptors such as Fukui functions were calculated to explain the chemical selectivity or reactivity site in Ternelin. Finally the calculated results were compared to simulated infrared and Raman spectra of the title compound which show good agreement with observed spectra. Molecular docking studies have been carried out in the active site of Ternelin and reactivity with ONIOM was also investigated.
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Affiliation(s)
- J Uma Maheswari
- Department of Physics, Sree Sastha Institute of Engg and Technology, Chembarabakkam, Chennai, Tamil Nadu, India.
| | - S Muthu
- Department of Physics, Sri Venkateswara College of Engineering, Pennalur, Tamil Nadu, India
| | - Tom Sundius
- Department of Physics, University of Helsinki, P.O. Box 64, FIN-00014 Helsinki, Finland
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Saglam S, Disli A, Erdogdu Y, Marchewka MK, Kanagathara N, Bay B, Güllüoğlu MT. Synthesis, characterization and theoretical studies of 5-(benzylthio)-1-cylopentyl-1H-tetrazole. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 135:1011-1018. [PMID: 25171051 DOI: 10.1016/j.saa.2014.07.071] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2013] [Revised: 07/11/2014] [Accepted: 07/28/2014] [Indexed: 06/03/2023]
Abstract
In this study, 5-(benzylthio)-1-cylopentyl-1H-tetrazole (5B1C1HT) have been synthesized. Boiling points of the obtained compound have been determined and it has been characterized by FT-IR, (1)H NMR, (13)C-APT and LC-MS spectroscopy techniques. The FT-IR, (1)H NMR and (13)C-APT spectral measurements of the 5B1C1HT compound and complete assignment of the vibrational bands observed in spectra has been discussed. The spectra were interpreted with the aid of normal coordinate analysis following full structure optimization and force field calculations based on Density Functional Theory (DFT) at 6-311++G(**), cc-pVDZ and cc-pVTZ basis sets. The optimized geometry with 6-311++G(**) basis sets were used to determine the total energy distribution, harmonic vibrational frequencies, IR intensities.
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Affiliation(s)
- S Saglam
- Department of Physics, Gazi University, Besevler, 06500 Ankara, Turkey
| | - A Disli
- Department of Chemistry, Gazi University, Besevler, 06500 Ankara, Turkey
| | - Y Erdogdu
- Department of Physics, Ahi Evran University, 40040 Kirsehir, Turkey
| | - M K Marchewka
- Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 937, 50-950 Wroclaw 2, Poland.
| | - N Kanagathara
- Department of Physics, Vel Tech Dr. RR & Dr. SR Technical University, Chennai 600062, India
| | - B Bay
- Department of Chemistry, Gazi University, Besevler, 06500 Ankara, Turkey
| | - M T Güllüoğlu
- Department of Physics, Ahi Evran University, 40040 Kirsehir, Turkey
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35
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Polat T, Yurdakul Ş. Quantum chemical and spectroscopic (FT-IR and FT-Raman) investigations of 3-methyl-3h-imidazole-4-carbaldehyde. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 133:683-696. [PMID: 24996210 DOI: 10.1016/j.saa.2014.05.039] [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: 01/28/2014] [Revised: 05/02/2014] [Accepted: 05/09/2014] [Indexed: 06/03/2023]
Abstract
FT-IR and FT-Raman spectra of 3-methyl-3h-imidazole-4-carbaldehyde (3M3HI4C) were recorded in the region 4000-400cm(-1) and 3500-50cm(-1), respectively. Optimized geometric parameters, conformational equilibria, normal mode frequencies, and corresponding vibrational assignments of 3M3HI4C were theoretically examined by quantum chemical methods for the first time. All vibrational frequencies were assigned in detail with the help of total energy distribution (TEDs). The experimental wavenumbers were compared with the scaled vibrational frequencies determined by DFT/B3LYP method. The results showed that the B3LYP/6-311++G(d,p) method predicts vibrational frequencies and the structural parameters effectively. The most stable conformer of the title compound was determined. The total electron density and molecular electrostatic potential surfaces of the molecule were constructed by using B3LYP/6-311++G(d,p) method to display electrostatic potential (electron+nuclei) distribution. The electronic properties HOMO and LUMO energies were measured. The lower energy band was assigned to the HOMO→LUMO transition. Natural bond orbital analysis of title molecule has been performed to indicate the presence of intramolecular charge transfer. Energies, relative stabilities, and dipole moments of title molecule were also compared and analyzed in the gas phase and in solvents. Furthermore, solvent effects on the geometry and vibrational frequency of 3M3HI4C were studied theoretically at the DFT/B3LYP level in combination with the conductor polarizable continuum model (C-PCM).
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Affiliation(s)
- Turgay Polat
- Department of Physics, Faculty of Arts and Sciences, Kastamonu University, Kuzeykent, 37100 Kastamonu, Turkey.
| | - Şenay Yurdakul
- Department of Physics, Faculty of Science, Gazi University, Teknikokullar, 06500 Ankara, Turkey
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36
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Erdogdu Y, Saglam S. Infrared, Raman and NMR spectra, conformational stability and vibrational assignment of 7,8-Dihydroxy-4-Methylcoumarin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 132:871-878. [PMID: 24935826 DOI: 10.1016/j.saa.2014.04.074] [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: 09/24/2013] [Revised: 04/08/2014] [Accepted: 04/17/2014] [Indexed: 06/03/2023]
Abstract
We report a combined some (infrared, Raman and NMR) spectroscopic and quantum chemistry study on 7,8-Dihydroxy-4-Methylcoumarin molecule (78D4MC). The Raman and IR spectra of 78D4MC molecule were recorded and analyzed in the region 3500-50 cm(-1) and 4000-400 cm(-1), respectively. Potential energy scans were performed at the MMFF level of theory. All possible conformers, which are results at the MMFF level theory, were re-computed at the B3LYP functional with cc-pVDZ basis set. The optimized geometrical parameters, harmonic vibrational wavenumbers and NMR chemical shifts of the most stable conformer were calculated at the B3LYP/6-311G(d,p), cc-pVTZ and cc-pVQZ level in the proximity of the isolated molecule. DFT calculations were combined with Pulay's scaled quantum mechanics force field (SQMFF) methodology in order to fit the theoretical wavenumbers to the experimental ones.
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Affiliation(s)
- Yusuf Erdogdu
- Department of Physics, Ahi Evran University, 40040 Kirsehir, Turkey.
| | - Semran Saglam
- Department of Physics, Gazi University, 06100 Ankara, Turkey
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37
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Wan MM, Zhu HY, Li YY, Ma J, Liu S, Zhu JH. Novel CO2-capture derived from the basic ionic liquids orientated on mesoporous materials. ACS APPLIED MATERIALS & INTERFACES 2014; 6:12947-12955. [PMID: 25032910 DOI: 10.1021/am5028814] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Two new basic ionic liquids (ILs) are designed and synthesized in order to conquer the challenge arising from the capture of CO2 in flue gas whose temperature is over 373 K, and they possess a suitable basic strength to adsorb CO2 at 393 K with the capacity of 22-49 mg g(-1). After these ILs are immobilized on mesoporous alumina or silica, equimolar CO2 capture is realized at 393 K for the first time. Besides, these adsorbents can be regenerated at 443 K to form a feasible cycle for controlling CO2 emission in flue gas. Theoretical calculations indicated the key role played by the mesoporous support in promoting CO2 adsorption via electrostatic interactions between support and ILs. An unwonted promotion of the support's ζ-potential on the performance of ILs is revealed, which induces the immobilized ILs to be oriented in a favorable dispersion, enhancing the efficiency of ILs in the CO2 adsorption at elevated temperature. This study proposes a new strategy for the sustainable development of novel adsorbent.
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Affiliation(s)
- Mi Mi Wan
- Key Laboratory of Mesoscopic Chemistry of MOE, College of Chemistry and Chemical Engineering, Nanjing University , Nanjing 210093, China
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38
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Bai Y, Du J, Weng X. Synthesis, characterization, optical properties and theoretical calculations of 6-fluoro coumarin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 126:14-20. [PMID: 24568846 DOI: 10.1016/j.saa.2014.01.123] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2013] [Revised: 01/17/2014] [Accepted: 01/26/2014] [Indexed: 06/03/2023]
Abstract
6-Fluoro coumarin is synthesized and characterized by (1)H NMR and (13)C NMR. The optical properties of the title compound are investigated by UV-vis absorption and fluorescence emission spectra, the results show the title compound can absorb UV-vis light at 319, 269 and 215nm, moreover it exhibits blue-purple fluorescence emission at 416nm. Theoretical studies on molecular structure, infrared spectra (IR), nuclear magnetic resonance ((1)H NMR, (13)C NMR) chemical shifts, UV-vis absorption and fluorescence emission of the synthesized compound have been worked out. Most chemical calculations were performed by density functional theory (DFT) method at the B3LYP/6-311G(d,p) level (NMR at B3LYP/Aug-CC-Pvdz level) using Gaussian 09 program. The compared results reveal that the scaled theoretical vibrational frequencies are in good accordance with the observed spectra; computational chemical shifts are consistent with the experimental values in most parts, except for some minor deviations; the UV-vis absorption calculated matches the experimental one very well, and the fluorescence emission spectrum is in good agreement with the experimental one when the solute-solvent hydrogen-bonding interaction is considered. These good coincidences prove that the computational methods selected can be used to predict these properties of other similar materials where it is difficult to arrive at experimental results.
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Affiliation(s)
- Yihui Bai
- College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua, Zhejiang 321004, PR China.
| | - Jinyan Du
- College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua, Zhejiang 321004, PR China
| | - Xuexiang Weng
- College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua, Zhejiang 321004, PR China.
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Polat T, Yıldırım G. Investigation of solvent polarity effect on molecular structure and vibrational spectrum of xanthine with the aid of quantum chemical computations. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2014; 123:98-109. [PMID: 24394526 DOI: 10.1016/j.saa.2013.12.035] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2013] [Revised: 11/29/2013] [Accepted: 12/04/2013] [Indexed: 06/03/2023]
Abstract
The main scope of this study is to determine the effects of 8 solvents on the geometric structure and vibrational spectra of the title compound, xanthine, by means of the DFT/B3LYP level of theory in the combination with the polarizable conductor continuum model (CPCM) for the first time. After determination of the most-steady state (favored structure) of the xanthine molecule, the role of the solvent polarity on the SCF energy (for the molecule stability), atomic charges (for charge distribution) and dipole moments (for molecular charge transfer) belonging to tautomer is discussed in detail. The results obtained indicate not only the presence of the hydrogen bonding and strong intra-molecular charge transfer (ICT) in the compound but the increment of the molecule stability with the solvent polarity, as well. Moreover, it is noted that the optimized geometric parameters and the theoretical vibrational frequencies are in good agreement with the available experimental results found in the literature. In fact, the correlations between the experimental and theoretical findings for the molecular structures improve with the enhancement of the solvent polarity. At the same time, the dimer forms of the xanthine compound are simulated to describe the effect of intermolecular hydrogen bonding on the molecular geometry and vibrational frequencies. It is found that the CO and NH stretching vibrations shift regularly to lower frequency value with higher IR intensity as the dielectric medium enhances systematically due to the intermolecular NH⋯O hydrogen bonds. Theoretical vibrational spectra are also assigned based on the potential energy distribution (PED) using the VEDA 4 program.
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Affiliation(s)
- Turgay Polat
- Kastamonu University, Department of Physics, Kastamonu 37100, Turkey.
| | - Gurcan Yıldırım
- Abant Izzet Baysal University, Department of Mechanical Engineering, Bolu 14280, Turkey
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40
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41
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Wandas M, Talik Z. Theoretical and experimental NMR data of 3,5-dinitro-2-(2-phenylhydrazinyl)pyridine and of its 4- and 6-methyl derivatives. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2013.03.052] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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42
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Erdogdu Y. Investigations of FT-IR, FT-Raman, FT-NMR spectra and quantum chemical computations of Esculetin molecule. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 106:25-33. [PMID: 23353760 DOI: 10.1016/j.saa.2012.12.043] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2012] [Revised: 12/10/2012] [Accepted: 12/14/2012] [Indexed: 06/01/2023]
Abstract
In this work, we report a combined experimental and theoretical study on molecular structure, vibrational spectra and electronic properties of Esculetin (ESC). The FT-IR, FT-Raman and FT-NMR spectra have been recorded and analyzed. The molecular geometry, harmonic vibrational frequencies, chemical shifts, HOMO, LUMO energies and molecular electrostatic potential map of ESC have been calculated by using Density Functional Theory (B3LYP) with 6-311G++(d,p), cc-pVDZ, cc-pVQZ and cc-pVTZ basis sets.
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Affiliation(s)
- Yusuf Erdogdu
- Department of Physics, Ahi Evran University, 40040 Kirsehir, Turkey.
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43
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Thomas DB, McGoverin CM, McGraw KJ, James HF, Madden O. Vibrational spectroscopic analyses of unique yellow feather pigments (spheniscins) in penguins. J R Soc Interface 2013; 10:20121065. [PMID: 23516063 DOI: 10.1098/rsif.2012.1065] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Many animals extract, synthesize and refine chemicals for colour display, where a range of compounds and structures can produce a diverse colour palette. Feather colours, for example, span the visible spectrum and mostly result from pigments in five chemical classes (carotenoids, melanins, porphyrins, psittacofulvins and metal oxides). However, the pigment that generates the yellow colour of penguin feathers appears to represent a sixth, poorly characterized class of feather pigments. This pigment class, here termed 'spheniscin', is displayed by half of the living penguin genera; the larger and richer colour displays of the pigment are highly attractive. Using Raman and mid-infrared spectroscopies, we analysed yellow feathers from two penguin species (king penguin, Aptenodytes patagonicus; macaroni penguin, Eudyptes chrysolophus) to further characterize spheniscin pigments. The Raman spectrum of spheniscin is distinct from spectra of other feather pigments and exhibits 17 distinctive spectral bands between 300 and 1700 cm(-1). Spectral bands from the yellow pigment are assigned to aromatically bound carbon atoms, and to skeletal modes in an aromatic, heterocyclic ring. It has been suggested that the penguin pigment is a pterin compound; Raman spectra from yellow penguin feathers are broadly consistent with previously reported pterin spectra, although we have not matched it to any known compound. Raman spectroscopy can provide a rapid and non-destructive method for surveying the distribution of different classes of feather pigments in the avian family tree, and for correlating the chemistry of spheniscin with compounds analysed elsewhere. We suggest that the sixth class of feather pigments may have evolved in a stem-lineage penguin and endowed modern penguins with a costly plumage trait that appears to be chemically unique among birds.
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Affiliation(s)
- Daniel B Thomas
- Department of Vertebrate Zoology, National Museum of Natural History, Smithsonian Institution, Washington, DC 20013, USA.
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Liu F, Wei Z, Wang L, Wang Z. Synthesis, experimental and theoretical investigation of molecular structure, IR, Raman spectra and 1H NMR analyses of 4,4′-dihydroxydiphenyl ether and 4,4′-oxybis(1-methoxybenzene). J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2012.11.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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45
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Ma H, Fei J, Cui Y, Zhao J, Wang A, Li J. Manipulating assembly of cationic dipeptides using sulfonic azobenzenes. Chem Commun (Camb) 2013; 49:9956-8. [DOI: 10.1039/c3cc45514a] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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46
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Prabavathi N, Nilufer A, Krishnakumar V. Molecular structure, vibrational, UV, NMR, hyperpolarizability, NBO and HOMO-LUMO analysis of Pteridine2,4-dione. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2012; 99:292-302. [PMID: 23085999 DOI: 10.1016/j.saa.2012.09.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2012] [Revised: 08/22/2012] [Accepted: 09/04/2012] [Indexed: 06/01/2023]
Abstract
The FTIR and FT-Raman spectra of Pteridine2,4-dione has been recorded in the region 4000-450 and 4000-100 cm(-1), respectively. The tautomeric stability, optimized geometry, frequency and intensity of the vibrational bands of Pteridine2,4-dione were obtained by the density functional theory (DFT) using 6-311++G(d,p) basis set. The harmonic vibrational frequencies were calculated and the scaled values have been compared with experimental FTIR and FT-Raman spectra. The observed and the calculated frequencies are found to be in good agreement. The (1)H and(13)C NMR spectra chemical shifts of the molecule were also calculated using the gauge independent atomic orbital (GIAO) method. The theoretical UV-Vis spectrum of the compound using CIS method and the electronic properties, such as HOMO and LUMO energies, were performed by time-dependent DFT (TD-DFT) approach. The calculated HOMO and LUMO energies show that charge transfer occurs within molecule. The first order hyperpolarizability (β(0)) of these novel molecular system and related properties (β, α(0) and Δα) of Pteridine2,4-dione are calculated using DFT/6-311++G (d,p) method on the finite-field approach. The Mulliken charges, the values of electric dipole moment (μ) of the molecule were computed using DFT calculations. The change in electron density (ED) in the σ(*) antibonding orbitals and stabilization energies E(2) have been calculated by natural bond (NBO) analysis to give clear evidence of stabilization originating in the hyper conjugation of hydrogen-bonded interactions.
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Affiliation(s)
- N Prabavathi
- Department of Physics, Sri Sarada College for Women (Autonomous), Salem 636 016, India.
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Akçay HT, Bayrak R, Karslioğlu S, Şahin E. Synthesis, characterization and spectroscopic studies of novel peripherally tetra-imidazole substituted phthalocyanine and its metal complexes, the computational and experimental studies of the novel phthalonitrile derivative. J Organomet Chem 2012. [DOI: 10.1016/j.jorganchem.2012.03.016] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Erdogdu Y, Dereli Ö, Sajan D, Joseph L, Unsalan O, Gulluoglu MT. Vibrational (FT-IR and FT-Raman) spectral investigations of 7-aminoflavone with density functional theoretical simulations. MOLECULAR SIMULATION 2012. [DOI: 10.1080/08927022.2011.632416] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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Sudha S, Karabacak M, Kurt M, Cinar M, Sundaraganesan N. Molecular structure, vibrational spectroscopic, first-order hyperpolarizability and HOMO, LUMO studies of 2-aminobenzimidazole. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 84:184-195. [PMID: 21981941 DOI: 10.1016/j.saa.2011.09.028] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2011] [Revised: 09/05/2011] [Accepted: 09/07/2011] [Indexed: 05/31/2023]
Abstract
In the present work, we reported a combined experimental and theoretical study on molecular structure, vibrational spectra and HOMO-LUMO analysis of 2-aminobenzimidazole (2-ABD). The FTIR (400-4000 cm(-1)) and FT-Raman spectra (50-3500 cm(-1)) of 2-ABD were recorded. The molecular geometry, harmonic vibrational wavenumbers and bonding features of 2-ABD in the ground-state have been calculated by using the density functional B3LYP method with 6-311++G(d,p) and 6-31G(d) as basis sets. The energy and oscillator strength were calculated by time-dependent density functional theory (TD-DFT) result complements with the experimental findings. The calculated HOMO and LUMO energies showed that charge transfer occurs within the molecule. Finally, the calculation results were applied to simulate infrared and Raman spectra of the title compound which showed good agreement with the observed spectra.
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Affiliation(s)
- S Sudha
- Department of Physics (Engg.), Annamalai University, Annamalai Nagar 608 002, Chidambaram, Tamil Nadu, India
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