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Kobchikova PP, Efimov SV, Klochkov VV. Binding of Different Cyclosporin Variants to Micelles Evidenced by NMR and MD Simulations. MEMBRANES 2023; 13:196. [PMID: 36837699 PMCID: PMC9965255 DOI: 10.3390/membranes13020196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 01/05/2023] [Accepted: 02/03/2023] [Indexed: 06/18/2023]
Abstract
Peptides play a critical role in the life of organisms, performing completely different functions. The biological activity of some peptides, such as cyclosporins, can be determined by the degree of membrane permeability. Thus, it becomes important to study how the molecule interacts with lipid bilayers. Cyclosporins C, E, H and L were characterised molecular dynamics simulation; NMR spectroscopy studies were also carried out for cyclosporins C and E. The comparison of one- and two-dimensional spectra revealed certain similarities between spatial structures of the studied cyclosporin variants. Upon dissolving in water containing DPC micelles, which serve as model membranes, subtle changes in the NMR spectra appear, but in a different way for different cyclosporins. In order to understand whether observed changes are related to any structural modifications, simulation of the interaction of the peptide with the phospholipid micelle was performed. The onset of the interaction was observed, when the peptide is trapped to the surface of the micelle. Simulations of this kind are also of interest in the light of the well-known membrane permeability of cyclosporin, which is important for its biological action.
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2
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Structural details on the interaction of fenamates with lipid membranes. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120502] [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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3
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Khodov I, Belov K, Dyshin A, Krestyaninov M, Kiselev M. Pressure effect on lidocaine conformational equilibria in scCO2: A study by 2D NOESY. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120525] [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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4
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Belov KV, Batista de Carvalho LAE, Dyshin AA, Efimov SV, Khodov IA. The Role of Hidden Conformers in Determination of Conformational Preferences of Mefenamic Acid by NOESY Spectroscopy. Pharmaceutics 2022; 14:2276. [PMID: 36365095 PMCID: PMC9696638 DOI: 10.3390/pharmaceutics14112276] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Revised: 10/20/2022] [Accepted: 10/21/2022] [Indexed: 12/25/2023] Open
Abstract
Mefenamic acid has been used as a non-steroidal anti-inflammatory drug for a long time. However, its practical use is quite limited due to a number of side effects on the intestinal organs. Conformational polymorphism provides mefenamic acid with unique properties regarding possible modifications obtained during the micronization process, which can improve pharmacokinetics and minimize side effects. Micronization can be performed by decompression of supercritical fluids; methods such as rapid expansion of the supercritical solution have proven their efficiency. However, this group of methods is poorly applicable for compounds with low solubility, and the modification of the method using a pharmaceutically suitable co-solvent may be useful. In our case, addition of only 2 mol% dimethyl sulfoxide increased the solubility remarkably. Information on the conformational state may be critically important for carrying out micronization. In this work, structural analysis and estimate of conformational preferences of mefenamic acid in dimethyl sulfoxide-d6 (at 25 °C and 0.1 MPa) and in a mixed solvent supercritical carbon dioxide + dimethyl sulfoxide-d6 (45 °C, 9 MPa) were performed based on nuclear Overhauser effect spectroscopy. Results show changes in the conformation fractions depending on the medium used. The importance of allowing for hidden conformers in estimating the conformational state was demonstrated in the analysis. Obtained results may be useful for improving micronization parameters.
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Affiliation(s)
- Konstantin V. Belov
- Krestov Institute of Solution Chemistry, Russian Academy of Sciences, 153045 Ivanovo, Russia
| | | | - Alexey A. Dyshin
- Krestov Institute of Solution Chemistry, Russian Academy of Sciences, 153045 Ivanovo, Russia
| | - Sergey V. Efimov
- Institute of Physics, Kazan Federal University, 420008 Kazan, Russia
| | - Ilya A. Khodov
- Krestov Institute of Solution Chemistry, Russian Academy of Sciences, 153045 Ivanovo, Russia
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5
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Guseva GB, Antina EV, Berezin MB, Ksenofontov AA, Bocharov PS, Smirnova AS, Pavelyev RS, Gilfanov IR, Pestova SV, Izmest'ev ES, Rubtsova SA, Kayumov AR, Kiselev SV, Azizova ZR, Ostolopovskaya OV, Efimov SV, Klochkov VV, Khodov IA, Nikitina LE. Conjugate of meso-carboxysubstituted-BODIPY with thioterpenoid as an effective fluorescent probe: Synthesis, structure, spectral characteristics, and molecular docking. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 268:120638. [PMID: 34840052 DOI: 10.1016/j.saa.2021.120638] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 10/20/2021] [Accepted: 11/12/2021] [Indexed: 06/13/2023]
Abstract
This paper is devoted to the design of a fluorescent probe based on meso-carboxysubstituted-BODIPY with a thioterpene fragment. The functional replacement of the methoxy group in the BODIPY molecule on a thioterpene fragment was carried out in order to find out the antiplatelet and anticoagulant action mechanisms of thioterpenoids and to assess the membrane and receptor factors contributions. The molecular structure of the conjugate was confirmed via UV/vis-, NMR- and MS-spectra. It is found that the probe is a high fluorescence quantum yield (to ∼ 100%) in the blue-green region at 509-516 nm. Molecular docking of all studied molecules showed that the BODIPY with terpenoid conjugation is an excellent way to increase their affinity to platelet receptor P2Y12.
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Affiliation(s)
- Galina B Guseva
- G.A. Krestov Institute of Solution Chemistry of Russian Academy of Sciences, 1 Akademicheskaya st., 153045 Ivanovo, Russia.
| | - Elena V Antina
- G.A. Krestov Institute of Solution Chemistry of Russian Academy of Sciences, 1 Akademicheskaya st., 153045 Ivanovo, Russia
| | - Mikhail B Berezin
- G.A. Krestov Institute of Solution Chemistry of Russian Academy of Sciences, 1 Akademicheskaya st., 153045 Ivanovo, Russia
| | - Alexander A Ksenofontov
- G.A. Krestov Institute of Solution Chemistry of Russian Academy of Sciences, 1 Akademicheskaya st., 153045 Ivanovo, Russia
| | - Pavel S Bocharov
- G.A. Krestov Institute of Solution Chemistry of Russian Academy of Sciences, 1 Akademicheskaya st., 153045 Ivanovo, Russia; Ivanovo State University of Chemistry and Technology, 7, Sheremetevskiy Avenue, 153000 Ivanovo, Russia
| | - Anastassia S Smirnova
- G.A. Krestov Institute of Solution Chemistry of Russian Academy of Sciences, 1 Akademicheskaya st., 153045 Ivanovo, Russia; Ivanovo State University of Chemistry and Technology, 7, Sheremetevskiy Avenue, 153000 Ivanovo, Russia
| | - Roman S Pavelyev
- Kazan Federal University, 18 Kremlevskaya st., 420008 Kazan, Russia
| | - Ilmir R Gilfanov
- Kazan State Medical University, 49 Butlerova st., 420012 Kazan, Russia
| | - Svetlana V Pestova
- Institute of Chemistry, Federal Research Center "Komi Scientific Centre", Ural Branch, Russian Academy of Sciences, ul. Pervomaiskaya 48, 167000 Syktyvkar, Russia
| | - Evgeny S Izmest'ev
- Institute of Chemistry, Federal Research Center "Komi Scientific Centre", Ural Branch, Russian Academy of Sciences, ul. Pervomaiskaya 48, 167000 Syktyvkar, Russia
| | - Svetlana A Rubtsova
- Institute of Chemistry, Federal Research Center "Komi Scientific Centre", Ural Branch, Russian Academy of Sciences, ul. Pervomaiskaya 48, 167000 Syktyvkar, Russia
| | - Airat R Kayumov
- Kazan Federal University, 18 Kremlevskaya st., 420008 Kazan, Russia
| | - Sergei V Kiselev
- Kazan State Medical University, 49 Butlerova st., 420012 Kazan, Russia
| | - Zulfiya R Azizova
- Kazan State Medical University, 49 Butlerova st., 420012 Kazan, Russia
| | | | - Sergey V Efimov
- Kazan Federal University, 18 Kremlevskaya st., 420008 Kazan, Russia
| | | | - Ilya A Khodov
- G.A. Krestov Institute of Solution Chemistry of Russian Academy of Sciences, 1 Akademicheskaya st., 153045 Ivanovo, Russia
| | - Liliya E Nikitina
- Kazan State Medical University, 49 Butlerova st., 420012 Kazan, Russia; Kazan Federal University, 18 Kremlevskaya st., 420008 Kazan, Russia
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6
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Unraveling the Mechanism of Platelet Aggregation Suppression by Monoterpenoids. BIOENGINEERING (BASEL, SWITZERLAND) 2022; 9:bioengineering9010024. [PMID: 35049733 PMCID: PMC8773274 DOI: 10.3390/bioengineering9010024] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Revised: 12/31/2021] [Accepted: 01/06/2022] [Indexed: 11/17/2022]
Abstract
Platelet aggregation causes various diseases and therefore challenges the development of novel antiaggregatory drugs. In this study, we report the possible mechanism of platelet aggregation suppression by newly synthesized myrtenol-derived monoterpenoids carrying different heteroatoms (sulphur, oxygen, or nitrogen). Despite all tested compounds suppressed the platelet aggregation in vitro, the most significant effect was observed for the S-containing compounds. The molecular docking confirmed the putative interaction of all tested compounds with the platelet’s P2Y12 receptor suggesting that the anti-aggregation properties of monoterpenoids are implemented by blocking the P2Y12 function. The calculated binding force depended on heteroatom in monoterpenoids and significantly decreased with the exchanging of the sulphur atom with oxygen or nitrogen. On the other hand, in NMR studies on dodecyl phosphocholine (DPC) as a membrane model, only S-containing compound was found to be bound with DPC micelles surface. Meanwhile, no stable complexes between DPC micelles with either O- or N-containing compounds were observed. The binding of S-containing compound with cellular membrane reinforces the mechanical properties of the latter, thereby preventing its destabilization and subsequent clot formation on the phospholipid surface. Taken together, our data demonstrate that S-containing myrtenol-derived monoterpenoid suppresses the platelet aggregation in vitro via both membrane stabilization and blocking the P2Y12 receptor and, thus, appears as a promising agent for hemostasis control.
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7
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Spatial structure and conformations of hydrazones derived from pyridoxal 5′-phosphate and 2-, 3-pyridinecarbohydrazide in the light of NMR study and quantum chemical calculations. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117372] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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8
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Lodochnikova OA, Islamov DR, Gerasimova DP, Zakharychev DV, Saifina AF, Pestova SV, Izmest'ev ES, Rubtsova SA, Pavelyev RS, Rakhmatullin IZ, Klochkov VV, Ostolopovskaya OV, Nikitina LE, Rollin P. Isobornanyl sulfoxides and isobornanyl sulfone: Physicochemical characteristics and the features of crystal structure. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130491] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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9
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Guseva GB, Antina EV, Berezin MB, Pavelyev RS, Kayumov AR, Ostolopovskaya OV, Gilfanov IR, Frolova LL, Kutchin AV, Akhverdiev RF, Lisovskaya SA, Trizna EY, Lodochnikova OA, Islamov DR, Efimov SV, Klochkov VV, Khodov IA, Boichuk SV, Nikitina LE. Design, Spectral Characteristics, and Possibilities for Practical Application of BODIPY FL-Labeled Monoterpenoid. ACS APPLIED BIO MATERIALS 2021; 4:6227-6235. [PMID: 35006906 DOI: 10.1021/acsabm.1c00550] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This article describes the design and biological properties of a BODIPY FL-labeled monoterpenoid BF2-meso-(4-((1″R)-6″,6″-dimethylbicyclo[3.1.1]hept-2″-ene-2″)yl-methoxycarbonylpropyl)-3,3',5,5'-tetramethyl-2,2'-dipyrromethene conjugate (BODIPYmyrt). The fluorophore was characterized using X-ray, NMR, MS, and UV/vis spectroscopy. The conjugate exhibits a high quantum yield (to ∼100%) in the region 515-518 nm. BODIPYmyrt effectively penetrates the membranes of the bacterial and fungal cells and therefore can be used to examine the features of a broad spectrum of Gram-positive and Gram-negative bacteria and pathogenic fungi as well. Moreover, BODIPYmyrt exhibits a moderate tropism to the subcellular structures in mammalian cells (e.g., mitochondria), thereby providing an attractive scaffold for fluorophores to examine these particular organelles.
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Affiliation(s)
- Galina B Guseva
- G.A. Krestov Institute of Solution Chemistry of Russian Academy of Sciences (ISC RAS), 153045 Ivanovo, Russian Federation
| | - Elena V Antina
- G.A. Krestov Institute of Solution Chemistry of Russian Academy of Sciences (ISC RAS), 153045 Ivanovo, Russian Federation
| | - Mikhail B Berezin
- G.A. Krestov Institute of Solution Chemistry of Russian Academy of Sciences (ISC RAS), 153045 Ivanovo, Russian Federation
| | | | | | | | - Ilmir R Gilfanov
- Kazan State Medical University, 420012 Kazan, Russian Federation
| | - Larisa L Frolova
- Institute of Chemistry, Federal Research Center "Komi Scientific Centre", 167000 Syktyvkar, Russian Federation
| | - Alexander V Kutchin
- Institute of Chemistry, Federal Research Center "Komi Scientific Centre", 167000 Syktyvkar, Russian Federation
| | | | - Svetlana A Lisovskaya
- Kazan State Medical University, Scientific Research Institute of Epidemiology and Microbiology, 420012 Kazan, Russian Federation
| | - Elena Y Trizna
- Kazan Federal University, 420008 Kazan, Russian Federation
| | - Olga A Lodochnikova
- Kazan Federal University, 420008 Kazan, Russian Federation.,Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center of Russian Academy of Sciences, 420008 Kazan, Russian Federation
| | - Daut R Islamov
- Kazan Federal University, 420008 Kazan, Russian Federation.,Arbuzov Institute of Organic and Physical Chemistry, Kazan Scientific Center of Russian Academy of Sciences, 420008 Kazan, Russian Federation
| | | | | | - Ilya A Khodov
- G.A. Krestov Institute of Solution Chemistry of Russian Academy of Sciences (ISC RAS), 153045 Ivanovo, Russian Federation.,Kazan Federal University, 420008 Kazan, Russian Federation
| | - Sergei V Boichuk
- Kazan State Medical University, 420012 Kazan, Russian Federation
| | - Liliya E Nikitina
- Kazan Federal University, 420008 Kazan, Russian Federation.,Kazan State Medical University, 420012 Kazan, Russian Federation
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10
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Dey S, Surendran D, Engberg O, Gupta A, Fanibunda SE, Das A, Maity BK, Dey A, Visvakarma V, Kallianpur M, Scheidt HA, Walker G, Vaidya VA, Huster D, Maiti S. Altered Membrane Mechanics Provides a Receptor-Independent Pathway for Serotonin Action. Chemistry 2021; 27:7533-7541. [PMID: 33502812 PMCID: PMC8252079 DOI: 10.1002/chem.202100328] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Indexed: 12/20/2022]
Abstract
Serotonin, an important signaling molecule in humans, has an unexpectedly high lipid membrane affinity. The significance of this finding has evoked considerable speculation. Here we show that membrane binding by serotonin can directly modulate membrane properties and cellular function, providing an activity pathway completely independent of serotonin receptors. Atomic force microscopy shows that serotonin makes artificial lipid bilayers softer, and induces nucleation of liquid disordered domains inside the raft‐like liquid‐ordered domains. Solid‐state NMR spectroscopy corroborates this data at the atomic level, revealing a homogeneous decrease in the order parameter of the lipid chains in the presence of serotonin. In the RN46A immortalized serotonergic neuronal cell line, extracellular serotonin enhances transferrin receptor endocytosis, even in the presence of broad‐spectrum serotonin receptor and transporter inhibitors. Similarly, it increases the membrane binding and internalization of oligomeric peptides. Our results uncover a mode of serotonin–membrane interaction that can potentiate key cellular processes in a receptor‐independent fashion.
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Affiliation(s)
- Simli Dey
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai, 400005, India
| | - Dayana Surendran
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai, 400005, India
| | - Oskar Engberg
- Institute of Medical Physics and Biophysics, University of Leipzig, Härtelstr. 16-18, 04107, Leipzig, Germany
| | - Ankur Gupta
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai, 400005, India
| | - Sashaina E Fanibunda
- Department of Biological Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai, 400005, India.,Kasturba Health Society, Medical Research Center, Mumbai, India
| | - Anirban Das
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai, 400005, India
| | - Barun Kumar Maity
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai, 400005, India
| | - Arpan Dey
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai, 400005, India
| | - Vicky Visvakarma
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai, 400005, India
| | - Mamata Kallianpur
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai, 400005, India
| | - Holger A Scheidt
- Institute of Medical Physics and Biophysics, University of Leipzig, Härtelstr. 16-18, 04107, Leipzig, Germany
| | - Gilbert Walker
- Department of Chemistry, University of Toronto, Toronto, Ontario, M5S3H6, Canada
| | - Vidita A Vaidya
- Department of Biological Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai, 400005, India
| | - Daniel Huster
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai, 400005, India.,Institute of Medical Physics and Biophysics, University of Leipzig, Härtelstr. 16-18, 04107, Leipzig, Germany
| | - Sudipta Maiti
- Department of Chemical Sciences, Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai, 400005, India
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11
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Mamardashvili GM, Lazovskiy DA, Khodov IA, Efimov AE, Mamardashvili NZ. New Polyporphyrin Arrays with Controlled Fluorescence Obtained by Diaxial Sn(IV)-Porphyrin Phenolates Chelation with Cu 2+ Cation. Polymers (Basel) 2021; 13:829. [PMID: 33800405 PMCID: PMC7962819 DOI: 10.3390/polym13050829] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Revised: 03/04/2021] [Accepted: 03/05/2021] [Indexed: 02/05/2023] Open
Abstract
New coordination oligomers and polymers of Sn(IV)-tetra(4-sulfonatophenyl)porphyrin have been constructed by the chelation reaction of its diaxialphenolates with Cu2+. The structure and properties of the synthesized polyporphyrin arrays were investigated by 1H Nuclear Magnetic Resonance (1H NMR), Infra Red (IR), Ultra Violet - Visible (UV-Vis) and fluorescence spectroscopy, mass spectrometry, Powder X-Rays Diffraction (PXRD), Electron Paramagnetic Resonance (EPR), thermal gravimetric, elemental analysis, and quantum chemical calculations. The results show that the diaxial coordination of bidentate organic ligands (L-tyrazine and diaminohydroquinone) leads to the quenching of the tetrapyrrole chromophore fluorescence, while the chelation of the porphyrinate diaxial complexes with Cu2+ is accompanied by an increase in the fluorescence in the organo-inorganic hybrid polymers formed. The obtained results are of particular interest to those involved in creating new 'chemo-responsive' (i.e., selectively interacting with other chemical species as receptors, sensors, or photocatalysts) materials, the optoelectronic properties of which can be controlled by varying the number and connection type of monomeric fragments in the polyporphyrin arrays.
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Affiliation(s)
| | | | | | | | - Nugzar Z. Mamardashvili
- G.A. Krestov Institute of Solution Chemistry of Russian Academy of Sciences, Akademicheskaya st. 1, 153045 Ivanovo, Russia; (G.M.M.); (D.A.L.); (I.A.K.); (A.E.E.)
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12
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Mamardashvili GM, Lazovskiy DA, Khodov IA, Efimov AE, Mamardashvili NZ. New Polyporphyrin Arrays with Controlled Fluorescence Obtained by Diaxial Sn(IV)-Porphyrin Phenolates Chelation with Cu2+ Cation. Polymers (Basel) 2021. [DOI: https://doi.org/10.3390/polym13050829] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
New coordination oligomers and polymers of Sn(IV)-tetra(4-sulfonatophenyl)porphyrin have been constructed by the chelation reaction of its diaxialphenolates with Cu2+. The structure and properties of the synthesized polyporphyrin arrays were investigated by 1H Nuclear Magnetic Resonance (1H NMR), Infra Red (IR), Ultra Violet - Visible (UV-Vis) and fluorescence spectroscopy, mass spectrometry, Powder X-Rays Diffraction (PXRD), Electron Paramagnetic Resonance (EPR), thermal gravimetric, elemental analysis, and quantum chemical calculations. The results show that the diaxial coordination of bidentate organic ligands (L-tyrazine and diaminohydroquinone) leads to the quenching of the tetrapyrrole chromophore fluorescence, while the chelation of the porphyrinate diaxial complexes with Cu2+ is accompanied by an increase in the fluorescence in the organo-inorganic hybrid polymers formed. The obtained results are of particular interest to those involved in creating new ‘chemo-responsive’ (i.e., selectively interacting with other chemical species as receptors, sensors, or photocatalysts) materials, the optoelectronic properties of which can be controlled by varying the number and connection type of monomeric fragments in the polyporphyrin arrays.
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13
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Khodov I, Dyshin A, Efimov S, Ivlev D, Kiselev M. High-pressure NMR spectroscopy in studies of the conformational composition of small molecules in supercritical carbon dioxide. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.113113] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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