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Baryshnikov GV, Valiev RR, Cherepanov VN, Karaush-Karmazin NN, Minaeva VA, Minaev BF, Ågren H. Aromaticity and photophysics of tetrasila- and tetragerma-annelated tetrathienylenes as new representatives of the hetero[8]circulene family. Phys Chem Chem Phys 2019; 21:9246-9254. [DOI: 10.1039/c9cp01608b] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The electronic structure, absorption and emission spectra, aromaticity and photophysical behavior of the recently synthesized tetrasilatetrathia[8]circulene and tetragermatetrathia[8]circulene compounds have been studied computationally.
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Affiliation(s)
- G. V. Baryshnikov
- Division of Theoretical Chemistry and Biology
- School of Engineering Sciences in Chemistry
- Biotechnology and Health
- KTH Royal Institute of Technology
- Stockholm
| | - R. R. Valiev
- Research School of Chemistry & Applied Biomedical Sciences
- National Research Tomsk Polytechnic University
- Tomsk 634050
- Russia
- Department of Chemistry
| | | | - N. N. Karaush-Karmazin
- Department of Chemistry and Nanomaterials Science
- Bohdan Khmelnytsky National University
- Cherkasy
- Ukraine
| | - V. A. Minaeva
- Department of Chemistry and Nanomaterials Science
- Bohdan Khmelnytsky National University
- Cherkasy
- Ukraine
| | - B. F. Minaev
- Department of Chemistry and Nanomaterials Science
- Bohdan Khmelnytsky National University
- Cherkasy
- Ukraine
| | - H. Ågren
- Division of Theoretical Chemistry and Biology
- School of Engineering Sciences in Chemistry
- Biotechnology and Health
- KTH Royal Institute of Technology
- Stockholm
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Karaush NN, Minaeva VA, Baryshnikov GV, Minaev BF, Ågren H. Identification of tautomeric intermediates of a novel thiazolylazonaphthol dye - A density functional theory study. Spectrochim Acta A Mol Biomol Spectrosc 2018; 203:324-332. [PMID: 29879648 DOI: 10.1016/j.saa.2018.05.096] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 05/18/2018] [Accepted: 05/27/2018] [Indexed: 06/08/2023]
Abstract
The recently synthesized thiazolylazo dye, 1-[5-benzyl-1,3-thiazol-2-yl)diazenyl]naphthalene-2-ol called shortly BnTAN, is studied by density functional theory (DFT) in three tautomeric forms in order to explain the available 1H NMR, UV-Vis and FTIR spectra. An experimentally observed IR band at 1678 cm-1, assigned to the CO bond stretching vibration, supports the notion that BnTAN retains in the less stable keto-form even in the solid state due to an ultrafast single-coordinate intramolecular proton transfer. This finding is also in a good agreement with an X-ray crystallography analysis which indicates an intermediate position of the proton between the -OH and -N=N- groups. Calculations also show that some experimentally observed 1H NMR signals could be considered as being averaged values between theoretically calculated chemical shifts for the corresponding protons in the keto- and enol-tautomers. At the same time the UV-Vis spectra are almost insensitive to the tautomerization processes as the main single band absorption at 500 nm is present in all tautomers according to our TD DFT simulations. The minor differences in spectral features of the long-wavelength visible region are also noted and discussed with respect to the manifestation of the less stable tautomer form.
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Affiliation(s)
- N N Karaush
- Department of Chemistry and Nanomaterials Science, Bohdan Khmelnytsky National University, 18031, Cherkasy, Ukraine.
| | - V A Minaeva
- Department of Chemistry and Nanomaterials Science, Bohdan Khmelnytsky National University, 18031, Cherkasy, Ukraine
| | - G V Baryshnikov
- Department of Chemistry and Nanomaterials Science, Bohdan Khmelnytsky National University, 18031, Cherkasy, Ukraine; Division of Theoretical Chemistry and Biology, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, 10691 Stockholm, Sweden
| | - B F Minaev
- Department of Chemistry and Nanomaterials Science, Bohdan Khmelnytsky National University, 18031, Cherkasy, Ukraine; Division of Theoretical Chemistry and Biology, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, 10691 Stockholm, Sweden
| | - H Ågren
- Division of Theoretical Chemistry and Biology, School of Engineering Sciences in Chemistry, Biotechnology and Health, KTH Royal Institute of Technology, 10691 Stockholm, Sweden; Department of Physics and Astronomy, Uppsala University, Box 516, SE-751 20 Uppsala, Sweden
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Gusev AN, Shul’gin VF, Minaev BF, Baryshnikov GV, Minaeva VA, Baryshnikova AT, Kiskin MA, Eremenko IL. Synthesis and luminescent properties of copper(I) complexes with 3-pyridin-2-yl-5-(4-R-phenyl)-1H-1,2,4-triazoles. RUSS J INORG CHEM+ 2017. [DOI: 10.1134/s0036023617040052] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Baryshnikov GV, Minaev BF, Minaeva VA. Electronic structure, aromaticity and spectra of hetero[8]circulenes. Russ Chem Rev 2015. [DOI: 10.1070/rcr4445] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Minaev BF, Shafranyosh MI, Svida YY, Sukhoviya MI, Shafranyosh II, Baryshnikov GV, Minaeva VA. Fragmentation of the adenine and guanine molecules induced by electron collisions. J Chem Phys 2015; 140:175101. [PMID: 24811665 DOI: 10.1063/1.4871881] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Secondary electron emission is the most important stage in the mechanism of radiation damage to DNA biopolymers induced by primary ionizing radiation. These secondary electrons ejected by the primary electron impacts can produce further ionizations, initiating an avalanche effect, leading to genome damage through the energy transfer from the primary objects to sensitive biomolecular targets, such as nitrogenous bases, saccharides, and other DNA and peptide components. In this work, the formation of positive and negative ions of purine bases of nucleic acids (adenine and guanine molecules) under the impact of slow electrons (from 0.1 till 200 eV) is studied by the crossed electron and molecular beams technique. The method used makes it possible to measure the molecular beam intensity and determine the total cross-sections for the formation of positive and negative ions of the studied molecules, their energy dependences, and absolute values. It is found that the maximum cross section for formation of the adenine and guanine positive ions is reached at about 90 eV energy of the electron beam and their absolute values are equal to 2.8 × 10(-15) and 3.2 × 10(-15) cm(2), respectively. The total cross section for formation of the negative ions is 6.1 × 10(-18) and 7.6 × 10(-18) cm(2) at the energy of 1.1 eV for adenine and guanine, respectively. The absolute cross-section values for the molecular ions are measured and the cross-sections of dissociative ionization are determined. Quantum chemical calculations are performed for the studied molecules, ions and fragments for interpretation of the crossed beams experiments.
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Affiliation(s)
- B F Minaev
- Bohdan Khmelnitsky National University, 18031 Cherkasy, Ukraine
| | | | - Yu Yu Svida
- Uzhgorod National University, 88000 Uzhgorod, Ukraine
| | - M I Sukhoviya
- Uzhgorod National University, 88000 Uzhgorod, Ukraine
| | | | - G V Baryshnikov
- Bohdan Khmelnitsky National University, 18031 Cherkasy, Ukraine
| | - V A Minaeva
- Bohdan Khmelnitsky National University, 18031 Cherkasy, Ukraine
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Baryshnikov GV, Minaev BF, Karaush NN, Minaeva VA. The art of the possible: computational design of the 1D and 2D materials based on the tetraoxa[8]circulene monomer. RSC Adv 2014. [DOI: 10.1039/c4ra02693d] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Single-wall nanotube based on tetraoxa[8]circulene monomer.
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Affiliation(s)
| | - B. F. Minaev
- Bohdan Khmelnytsky National University
- Cherkassy, Ukraine
- Tomsk State University
- Tomsk, Russian Federation
| | - N. N. Karaush
- Bohdan Khmelnytsky National University
- Cherkassy, Ukraine
| | - V. A. Minaeva
- Bohdan Khmelnytsky National University
- Cherkassy, Ukraine
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Baryshnikov GV, Minaev BF, Korop AA, Minaeva VA, Gusev AN. Structure of zinc complexes with 3-(pyridin-2-yl)-5-(arylideneiminophenyl)-1H-1,2,4-triazoles in different tautomeric forms: DFT and QTAIM study. RUSS J INORG CHEM+ 2013. [DOI: 10.1134/s0036023613080032] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Baryshnikov GV, Minaev BF, Minaeva VA, Podgornaya AT, Ågren H. Application of Bader’s atoms in molecules theory to the description of coordination bonds in the complex compounds of Ca2+ and Mg2+ with methylidene rhodanine and its anion. RUSS J GEN CHEM+ 2012. [DOI: 10.1134/s1070363212070122] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Baryshnikov GV, Minaev BF, Minaeva VA, Baryshnikova AT. Structure and intramolecular stabilization of geometric isomers of Bi- and trithiazolidine-4-ones and their methyl derivatives: A DFT and QTAIM study. J STRUCT CHEM+ 2012. [DOI: 10.1134/s0022476612030031] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Minaeva VA, Minaev BF, Baryshnikov GV, Kopylova TN, Gadirov RM, Eremina NS. Study of structure and spectral characteristics of the binuclear zinc complex with (E)-2-({2-[3-(pyridin-2-yl)-1H-1,2,4-triazol-5-yl]phenylimino}methyl)phenol. RUSS J GEN CHEM+ 2011. [DOI: 10.1134/s1070363211110193] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Baryshnikov GV, Minaev BF, Minaeva VA. Theoretical study of the models of Ca2+ and Mg2+ ions binding by the methylidene rhodanine neutral and anionic forms. RUSS J GEN CHEM+ 2011. [DOI: 10.1134/s1070363211030248] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Minaev BF, Minaeva VA, Baryshnikov GV, Girtu MA, Agren H. Theoretical study of vibration spectra of sensitizing dyes for photoelectrical converters based on ruthenium(II) and iridium(III) complexes. RUSS J APPL CHEM+ 2009. [DOI: 10.1134/s1070427209070106] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Minaeva VA, Minaev BF, Hovorun DM. Vibrational spectra of the steroid hormones, estradiol and estriol, calculated by density functional theory. The role of low-frequency vibrations. Ukr Biokhim Zh (1999) 2008; 80:82-95. [PMID: 19140454] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The structure of estrogen receptors and their interaction with 17beta-estradiol and estriol are of particular interest today because the treatment of breast cancer and the cause of the disease are intricately linked to the activity of the estrogen receptor and the normal blood serum level of these hormones. Molecular geometry and vibration frequencies of these steroid hormones are calculated by density functional theory with the B3LYP/ 6-31G** approximation. Intensities of infrared absorption and Raman spectra for estradiol are in an agreement with the experiment data. The assignments of all vibrational bands in the spectra of these hormones are presented on the basis of quantum chemical calculations of frequencies and normal modes. For the large number of bands such an assignment is made for the first time. The analysis of infrared spectra of both hormones indicates some nontrivial structure-spectra correlations. A series of specific vibrations is predicted in the low-frequency region of the IR spectra; their role in hormone-receptor interaction and in energy transfer processes are discussed. The search of the optimized geometrical structure by minimization of the total energy gradient is accompanied by the second derivatives calculation; diagonalization of the Hessian matrix leads finally to solution of vibration problem. The 17beta-estradiol molecule consists of 44 atoms and has 126 normal modes of internal vibrations. All these normal modes are presented together with their analysis and comparison with experimental data. From this comparison we have obtained an assignment of all absorption IR bands of 17beta-estradiol recorded earlier in KBr. For all stretching vibrations our assignment is in agreement with the previous one, obtained on the basis of the empirical rules. Direct DFT calculation of vibrational frequencies cannot provide a 100% agreement with the experimental IR spectra and scaling factors in the range of 0.95-0.97 are used in order to fit theoretical and experimental data.
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Affiliation(s)
- V A Minaeva
- Bohdan Khmelnytskyy National University, Cherkasy, Ukraine.
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Minaev BF, Yevtukhov YV, Minaeva VA. Quantum-chemical modelling radiation damage of DNA components during inelastic interaction with slow electrons. Desoxyribose irradiation. ACTA ACUST UNITED AC 2005. [DOI: 10.7124/bc.0006fc] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Solodovnikov IP, Markov VI, Minaeva VA, Lytkina IN, Volkova IF, Akmammedov DK, Sliusar' VN. [The epidemiological determinants of the irregular territorial spread of typhoid fever]. Zh Mikrobiol Epidemiol Immunobiol 1995:31-3. [PMID: 8553739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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