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Conformational, spectroscopic, electric and electronic investigations on 5-nitropyridine-2-hydrazino-3-carbonitrile-6-methyl-4-(methoxymethyl) (molecule 2): Molecular docking study. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2020.128018] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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2
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Ismahan L, Leila N, Fatiha M, Abdelkrim G, Mouna C, Nada B, Brahim H. Computational study of inclusion complex of l-Glutamine/beta-Cycldextrin: Electronic and intermolecular interactions investigations. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2020.127740] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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3
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Nora M, Ismahan L, Abdelkrim G, Mouna C, Leila N, Fatiha M, Nada B, Brahim H. Interactions in inclusion complex of β-cyclodextrin/l-Metheonine: DFT computational studies. J INCL PHENOM MACRO 2019. [DOI: 10.1007/s10847-019-00948-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Georgiev A, Stoilova A, Dimov D, Yordanov D, Zhivkov I, Weiter M. Synthesis and photochromic properties of some N-phthalimide azo-azomethine dyes. A DFT quantum mechanical calculations on imine-enamine tautomerism and trans-cis photoisomerization. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 210:230-244. [PMID: 30458391 DOI: 10.1016/j.saa.2018.11.033] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Revised: 10/11/2018] [Accepted: 11/12/2018] [Indexed: 06/09/2023]
Abstract
This paper presents synthesis, photophysical characterization and quantum mechanical calculations of some N-phthalimide azo-azomethine dyes. The dyes were synthesized via azo coupling reaction between 2,4-substituted aromatic anilines and salicylic aldehyde followed by condensation reactions between azo dyes and N-aminophtalimide. Quantum chemical calculations to optimise the molecular geometry and to determine the electron densities of the trans (E) imine ⇌ enamine and the cis (Z) imine ⇌ enamine isomers and their vibrational frequencies have been computed by using DFT at B3LYP/6-31 + G(d,p) level of theory in vacuo. The effect of the used DMF solvent on the molecular structure and bond energies has been determined by using the IEFPCM model. Thermodynamic parameters such as total electronic energy E(RB3LYP), enthalpy H298 (sum of electronic and thermal enthalpies), free Gibbs energy G298 (sum of electronic and thermal free Gibbs energies) and dipole moment μ were computed in order to estimate the ΔE, Δμ, ΔH, ΔG and ΔS values. The NBO analysis was performed in order to understand the intramolecular charge transfer and the energy of resonance stabilization. After molecular geometry optimization, the electronic spectra were obtained by TD-DFT calculations at the above mentioned basis set using the IEFPCM model of DMF as a solvent. The solvatochromic effect of the dyes in four solvents with different polarity has been studied by UV-VIS spectroscopy and compared with the theoretically predicted. The coincidence between measured and calculated spectra is satisfactory. The dynamic photoisomerization experiments were performed in DMF under irradiation with UV light at λ = 365 nm (mostly E → Z) and with VIS light at λ = 400-800 nm (mostly Z → E). The spectra were recorded in the spectral region from 300 to 800 nm at identical sample concentrations of the three dyes and illumination times in order to investigate the photodynamical E → Z → E conversion of the NN chromophore group of the dyes as well as the imine ⇌ enamine tautomerization.
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Affiliation(s)
- Anton Georgiev
- Department of Organic Chemistry, Department of Physics, University of Chemical Technology and Metallurgy, 1756 Sofia, 8 St. Kliment Ohridski Blvd, Bulgaria.
| | - Ani Stoilova
- Department of Organic Chemistry, Department of Physics, University of Chemical Technology and Metallurgy, 1756 Sofia, 8 St. Kliment Ohridski Blvd, Bulgaria
| | - Deyan Dimov
- Department of Optical Materials, Institute of Optical Materials and Technologies, Bulgarian Academy of Science, 1113 Sofia, 109 "Acad. G. Bonchev" Blvd., Bulgaria
| | - Dancho Yordanov
- Laboratory of Chemistry and Biophysics of Proteins and Enzyme, Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Science, 9 "Acad. G. Bonchev" Blvd., Sofia 1113, Bulgaria
| | - Ivailo Zhivkov
- Department of Optical Materials, Institute of Optical Materials and Technologies, Bulgarian Academy of Science, 1113 Sofia, 109 "Acad. G. Bonchev" Blvd., Bulgaria; Materials Research Centre, Faculty of Chemistry, Purkyňova 118, Brno, Brno University of Technology, Czech Republic
| | - Martin Weiter
- Materials Research Centre, Faculty of Chemistry, Purkyňova 118, Brno, Brno University of Technology, Czech Republic
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Synthesis, crystal structure, spectroscopic investigations and DFT calculations of the copper(II) complex of 4-(Trifluoromethyl)pyridine-2-carboxylic acid. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.06.056] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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6
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Theoretical and spectroscopic (FT-IR, NMR and UV–Vis.) characterizations of 3-p-chlorobenzyl-4-(4-carboxybenzylidenamino)-4,5-dihydro-1H-1,2,4-triazol-5-one molecule. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2016.07.092] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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7
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Experimental and computational study of the structure and spectroscopic properties of 1′,3′-Dihydrospiro[cyclohexane-1,2′-[2 H ]imidazo[4,5- b ]pyridine]. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2016.07.065] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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8
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Vural H. Experimental and computational studies of 4-(Trifluoromethyl)pyridine-2-carboxylic acid. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2016.01.076] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Tamer Ö, Arslan BS, Avcı D, Nebioğlu M, Atalay Y, Çoşut B. Synthesis, molecular structure, spectral analysis and nonlinear optical studies on 4-(4-bromophenyl)-1-tert-butyl-3-methyl-1H-pyrazol-5-amine: A combined experimental and DFT approach. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2015.10.084] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Tamer Ö, Avcı D, Atalay Y. Synthesis, X-ray structure, spectroscopic characterization and nonlinear optical properties of Nickel (II) complex with picolinate: A combined experimental and theoretical study. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2015.05.035] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Tamer Ö, Dege N, Avcı D, Atalay Y, Özer İlhan İ, Çadır M. Synthesis, structural and spectroscopic evaluations and nonlinear optical properties of 3,5-bis(4-methoxyphenyl)-4,5-dihydro-1H-pyrazole-1-carbothioic O-acid. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 137:1387-1396. [PMID: 25306134 DOI: 10.1016/j.saa.2014.08.111] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2014] [Revised: 08/08/2014] [Accepted: 08/24/2014] [Indexed: 06/04/2023]
Abstract
In this study, we report a combined experimental and theoretical study on 3,5-bis(4-methoxyphenyl)-4,5-dihydro-1H-pyrazole-1-carbothioic O-acid (C18H18N2O3S) molecule. The compound crystallizes in the trigonal space group R-3 with a=b=27.7151(12) Å, c=12.4866(6) Å, α=β=90.0°, γ=120.0° and Z=18. The crystal packing is stabilized by O-H⋯O and O-H⋯S intermolecular hydrogen bonds. These hydrogen bond interactions are also proved by NBO analysis. A detailed spectroscopic investigation is performed by the application of FT-IR and FT-NMR in addition to the theoretical approaches. Small energy gap between the frontier molecular orbitals is responsible for the nonlinear optical activity of the title molecule.
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Affiliation(s)
- Ömer Tamer
- Sakarya University, Arts and Sciences Faculty, Department of Physics, 54187 Sakarya, Turkey
| | - Necmi Dege
- Ondokuz Mayıs University, Arts and Sciences Faculty, Department of Physics, 55139 Samsun, Turkey
| | - Davut Avcı
- Sakarya University, Arts and Sciences Faculty, Department of Physics, 54187 Sakarya, Turkey
| | - Yusuf Atalay
- Sakarya University, Arts and Sciences Faculty, Department of Physics, 54187 Sakarya, Turkey.
| | - İlhan Özer İlhan
- Department of Chemistry, Faculty of Science, Erciyes University, 38039 Kayseri, Turkey
| | - Mehmet Çadır
- Department of Chemistry, Faculty of Science, Erciyes University, 38039 Kayseri, Turkey
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Tamer Ö, Avcı D, Atalay Y. The effects of electronegative substituent atoms on structural, vibrational, electronic and NLO properties of some 4-nitrostilbene derivates. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 136 Pt B:644-650. [PMID: 25448964 DOI: 10.1016/j.saa.2014.09.078] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2014] [Revised: 09/12/2014] [Accepted: 09/19/2014] [Indexed: 06/04/2023]
Abstract
Organic compounds which have one or more aromatic systems in conjugated positions show charge transfer interactions which are responsible for the non-linear properties of the compounds. A conjugated π electron system enables a pathway for the entire length of conjugation under the perturbation of an external electric field. When electron donating and withdrawing moieties are located at terminal position of conjugated backbone, nonlinear optical (NLO) properties have been increased significantly which involve the correlated and high delocalized π electron states. Recently synthesized organic complexes, 1-(4-fluorostyryl)-4-nitrostilbene (1), 4-Chloro 4-nitrostilbene (2), 4-Bromo 4-nitrostilbene (3) and 4-Iodo 4-nitrostilbene (4), were simulated using density functional theory (DFT). Based on the optimized geometries, spectroscopic and NLO properties of these complexes were discussed as compared with each other.
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Affiliation(s)
- Ömer Tamer
- Sakarya University, Arts and Sciences Faculty, Department of Physics, 54187 Sakarya, Turkey.
| | - Davut Avcı
- Sakarya University, Arts and Sciences Faculty, Department of Physics, 54187 Sakarya, Turkey
| | - Yusuf Atalay
- Sakarya University, Arts and Sciences Faculty, Department of Physics, 54187 Sakarya, Turkey
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