1
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Vereshchagin AA, Volkov AI, Novoselova JV, Panjwani NA, Yankin AN, Sizov VV, Lukyanov DA, Behrends J, Levin OV. Harmonizing Energies: The Interplay Between a Nonplanar SalEn-Type Molecule and a TEMPO Moiety in a New Hybrid Energy-Storing Redox-Conducting Polymer. Macromol Rapid Commun 2024; 45:e2400074. [PMID: 38593474 DOI: 10.1002/marc.202400074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Revised: 03/19/2024] [Indexed: 04/11/2024]
Abstract
Redox-conducting polymers based on SalEn-type complexes have attracted considerable attention due to their potential applications in electrochemical devices. However, their charge transfer mechanisms, physical and electrochemical properties remain unclear, hindering their rational design and optimization. This study aims to establish the influence of monomer geometry on the polymer's properties by investigating the properties of novel nonplanar SalEn-type complexes, poly[N,N'-bis(salicylidene)propylene-2-(hydroxy)diaminonickel(II)], and its analog with 2,2,6,6-tetramethylpiperidinyl-N-oxyl (TEMPO)-substituted bridge (MTS). To elucidate the charge transfer mechanism, operando UV-Vis spectroelectrochemical analysis, electrochemical impedance spectroscopy, and electron paramagnetic resonance are employed. Introducing TEMPO into the bridge moiety enhanced the specific capacity of the poly(MTS) material to 95 mA h g-1, attributed to TEMPO's and conductive backbone's charge storage capabilities. Replacement of the ethylenediimino-bridge with a 1,3-propylenediimino- bridge induced significant changes in the complex geometry and material's morphology, electrochemical, and spectral properties. At nearly the same potential, polaron and bipolaron particles emerged, suggesting intriguing features at the overlap point of the electroactivity potentials ranges of polaron-bipolaron and TEMPO, such as a disruption in the connection between TEMPO and the conjugation chain or intramolecular charge transfer. These results offer valuable insights for optimizing strategies to create organic materials with tailored properties for use in catalysis and battery applications.
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Affiliation(s)
- Anatoliy A Vereshchagin
- Saint Petersburg State University 7/9 Universitetskaya nab., St. Petersburg, 199034, Russia
- Berlin Joint EPR Lab, Fachbereich Physik Freie Universität Berlin, 14195, Berlin, Germany
| | - Alexey I Volkov
- Saint Petersburg State University 7/9 Universitetskaya nab., St. Petersburg, 199034, Russia
| | - Julia V Novoselova
- Saint Petersburg State University 7/9 Universitetskaya nab., St. Petersburg, 199034, Russia
| | - Naitik A Panjwani
- Berlin Joint EPR Lab, Fachbereich Physik Freie Universität Berlin, 14195, Berlin, Germany
| | - Andrei N Yankin
- ITMO University Kronverksky Pr. 49, bldg. A, St. Petersburg, 197101, Russia
| | - Vladimir V Sizov
- Saint Petersburg State University 7/9 Universitetskaya nab., St. Petersburg, 199034, Russia
| | - Daniil A Lukyanov
- Saint Petersburg State University 7/9 Universitetskaya nab., St. Petersburg, 199034, Russia
| | - Jan Behrends
- Berlin Joint EPR Lab, Fachbereich Physik Freie Universität Berlin, 14195, Berlin, Germany
| | - Oleg V Levin
- Saint Petersburg State University 7/9 Universitetskaya nab., St. Petersburg, 199034, Russia
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2
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Ngounoue Kamga FA, Hrubaru MM, Enache O, Diacu E, Draghici C, Tecuceanu V, Ungureanu EM, Nkemone S, Ndifon PT. Ni(II)-Salophen-Comprehensive Analysis on Electrochemical and Spectral Characterization and Biological Studies. Molecules 2023; 28:5464. [PMID: 37513334 PMCID: PMC10384438 DOI: 10.3390/molecules28145464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2023] [Revised: 07/03/2023] [Accepted: 07/12/2023] [Indexed: 07/30/2023] Open
Abstract
New aspects of the Ni(II)-salophen complex and salophen ligand precursor were found during deep electrochemical and optical characterization, as well as biological studies for new pharmacological applications. Physicochemical and spectroscopic methods (1H- and 13C-NMR, FT-IR and UV-Vis, electrospray ionization mass spectroscopy, thermogravimetric analysis, and molar conductance measurements) were also used to prove that the salophen ligand acts as a tetradentate and coordinates to the central metal through nitrogen and oxygen atoms. The electrochemical behavior of the free Schiff salophen ligand (H2L) and its Ni(II) complex (Ni(II)L) was deeply studied in tetrabutylammonium perchlorate solutions in acetonitrile via CV, DPV, and RDE. Blue films on the surfaces of the electrodes as a result of the electropolymerization processes were put in evidence and characterized via CV and DPV. (H2L) and Ni(II)L complexes were tested for their antimicrobial, antifungal, and antioxidant activity, showing good antimicrobial and antifungal activity against several bacteria and fungi.
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Affiliation(s)
- Francis Aurelien Ngounoue Kamga
- Coordination Chemistry Laboratory, Department of Inorganic Chemistry, Faculty of Science, University of Yaounde 1, Yaounde P.O. Box 812, Cameroon
- Faculty of Chemical Engineering and Biotechnologies, University "Politehnica" of Bucharest, Gheorghe Polizu 1-7, Sector 1, 011061 Bucharest, Romania
| | - Madalina-Marina Hrubaru
- Faculty of Chemical Engineering and Biotechnologies, University "Politehnica" of Bucharest, Gheorghe Polizu 1-7, Sector 1, 011061 Bucharest, Romania
- "C. D. Nenitzescu" Institute of Organic and Supramolecular Chemistry, Romanian Academy, Sector 6, Spl. Independentei 202B, 060023 Bucharest, Romania
| | - Oana Enache
- Faculty of Chemical Engineering and Biotechnologies, University "Politehnica" of Bucharest, Gheorghe Polizu 1-7, Sector 1, 011061 Bucharest, Romania
| | - Elena Diacu
- Faculty of Chemical Engineering and Biotechnologies, University "Politehnica" of Bucharest, Gheorghe Polizu 1-7, Sector 1, 011061 Bucharest, Romania
| | - Constantin Draghici
- "C. D. Nenitzescu" Institute of Organic and Supramolecular Chemistry, Romanian Academy, Sector 6, Spl. Independentei 202B, 060023 Bucharest, Romania
| | - Victorita Tecuceanu
- "C. D. Nenitzescu" Institute of Organic and Supramolecular Chemistry, Romanian Academy, Sector 6, Spl. Independentei 202B, 060023 Bucharest, Romania
| | - Eleonora-Mihaela Ungureanu
- Faculty of Chemical Engineering and Biotechnologies, University "Politehnica" of Bucharest, Gheorghe Polizu 1-7, Sector 1, 011061 Bucharest, Romania
| | - Stephanie Nkemone
- Coordination Chemistry Laboratory, Department of Inorganic Chemistry, Faculty of Science, University of Yaounde 1, Yaounde P.O. Box 812, Cameroon
| | - Peter T Ndifon
- Coordination Chemistry Laboratory, Department of Inorganic Chemistry, Faculty of Science, University of Yaounde 1, Yaounde P.O. Box 812, Cameroon
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3
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Pander P, Gomes Franca L, Dias FB, Kozhevnikov VN. Electroluminescence of Tetradentate Pt(II) Complexes: O^N^N^O versus C^N^N^O Coordination. Inorg Chem 2023; 62:5772-5779. [PMID: 36996164 PMCID: PMC10091473 DOI: 10.1021/acs.inorgchem.3c00364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/01/2023]
Abstract
Alkylation of one of the phenolic hydroxyl groups in a salen-type tetradentate ligand changes the coordination mode from O^N^N^O to the cyclometallating C^N^N^O type. The ligand was used to synthesize a new cyclometalated luminescent Pt(II) complex 2. While in solution the complex is poorly luminescent, in the solid state the emission is reinstated, which allowed one to evaluate complex 2 as a phosphorescent emitter in organic light-emitting diodes. 2 displays external quantum efficiency (EQE) = 9.1% and a maximum luminance of 9000 cd m-2 in a vacuum-deposited device. We carried out comparative analysis of photo- and electroluminescence of complex 2 with O^N^N^O complex 1 and demonstrated that the similar luminescent properties of the O^N^N^O and C^N^N^O complexes are rather coincidental because they display different excited-state landscapes. Surprisingly, the two complexes display a dramatically different electrochemical behavior, with O^N^N^O coordination leading to the formation of a stable electropolymer but C^N^N^O coordination fully preventing electropolymerization.
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Affiliation(s)
- Piotr Pander
- Faculty of Chemistry, Silesian University of Technology, Strzody 9, Gliwice 44-100, Poland
- Centre for Organic and Nanohybrid Electronics, Silesian University of Technology, Konarskiego 22B, Gliwice 44-100, Poland
| | | | - Fernando B Dias
- Department of Physics, Durham University, South Road, Durham DH1 3LE, U.K
| | - Valery N Kozhevnikov
- Department of Applied Sciences, Faculty of Health and Life Sciences, Northumbria University, Newcastle upon Tyne, Tyne and Wear NE1 8ST, U.K
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4
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Pesqueira NM, Bignardi C, Oliveira LF, Machado AE, Carvalho-Jr VP, Goi BE. Visible light-induced radical polymerization of vinyl acetate mediated by organo-nickel N2O2 Schiff-base complexes. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2022.114443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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5
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Volkov AI, Apraksin RV, Falaleev EA, Novoselova JV, Volosatova YA, Lukyanov DA, Alekseeva EV, Levin OV. Tuning cationic transport in Nisalen polymers via pseudo-crown functionality. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.140750] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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6
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Tomczyk D, Seliger P, Bukowski W, Bester K. The Influence of Electrolyte Type on Kinetics of Redox Processes in the Polymer Films of Ni(II) Salen-Type Complexes. Molecules 2022; 27:1812. [PMID: 35335175 PMCID: PMC8954381 DOI: 10.3390/molecules27061812] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2022] [Revised: 03/06/2022] [Accepted: 03/07/2022] [Indexed: 11/16/2022] Open
Abstract
Electrodes modified with polymers derived from the complexes [Ni(salcn)], [Ni(salcn(Me))] and [Ni(salcn(Bu))] were obtained in order to study the kinetics of electrode processes occurring in polymer films, depending on the thickness of the films, the type of electrolyte and the solvent. FTIR and EQCM methods were used to determine the type of mass transported into polymer films during anode processes and the number of moles of ions and solvent. The rate of charge transport through films was determined by the cyclic voltammetry method, by the quantity cD1/2. It was shown that the charge transport was determined by the transport of anions. The kinetics were most efficient for poly[Ni(salcn(Bu))] modified electrodes, obtained from TBAPF6 and working in TBAClO4 and TBABF4. It was also shown that a solvent with a higher DN value and lower viscosity (MeCN) facilitated the transport of the charge through polymer films.
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Affiliation(s)
- Danuta Tomczyk
- Department of Inorganic and Analytical Chemistry, University of Łódź, ul. Tamka 12, 91-403 Łódź, Poland;
| | - Piotr Seliger
- Department of Inorganic and Analytical Chemistry, University of Łódź, ul. Tamka 12, 91-403 Łódź, Poland;
| | - Wiktor Bukowski
- Faculty of Chemistry, Rzeszów University of Technology, Al. Powstańców W-wy 6, 35-959 Rzeszów, Poland; (W.B.); (K.B.)
| | - Karol Bester
- Faculty of Chemistry, Rzeszów University of Technology, Al. Powstańców W-wy 6, 35-959 Rzeszów, Poland; (W.B.); (K.B.)
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7
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Reversible Redox Processes in Polymer of Unmetalated Salen-Type Ligand: Combined Electrochemical in Situ Studies and Direct Comparison with Corresponding Nickel Metallopolymer. Int J Mol Sci 2022; 23:ijms23031795. [PMID: 35163715 PMCID: PMC8836782 DOI: 10.3390/ijms23031795] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 02/02/2022] [Accepted: 02/03/2022] [Indexed: 11/17/2022] Open
Abstract
Most non-metalized Salen-type ligands form passivation thin films on electrode surfaces upon electrochemical oxidation. In contrast, the H2(3-MeOSalen) forms electroactive polymer films similarly to the corresponding nickel complex. There are no details of electrochemistry, doping mechanism and charge transfer pathways in the polymers of pristine Salen-type ligands. We studied a previously uncharacterized electrochemically active polymer of a Salen-type ligand H2(3-MeOSalen) by a combination of cyclic voltammetry, in situ ultraviolet-visible (UV-VIS) spectroelectrochemistry, in situ electrochemical quartz crystal microbalance and Fourier Transform infrared spectroscopy (FTIR) spectroscopy. By directly comparing it with the polymer of a Salen-type nickel complex poly-Ni(3-MeOSalen) we elucidate the effect of the central metal atom on the structure and charge transport properties of the electrochemically doped polymer films. We have shown that the mechanism of charge transfer in the polymeric ligand poly-H2(3-MeOSalen) are markedly different from the corresponding polymeric nickel complex. Due to deviation from planarity of N2O2 sphere for the ligand H2(3-MeOSalen), the main pathway of electron transfer in the polymer film poly-H2(3-MeOSalen) is between π-stacked structures (the π-electronic systems of phenyl rings are packed face-to-face) and C-C bonded phenyl rings. The main way of electron transfer in the polymer film poly-Ni(3-MeOSalen) is along the polymer chain, while redox processes are ligand-based.
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8
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Tomczyk D, Bukowski W, Bester K, Kaczmarek M. Electrocatalytic Properties of Ni(II) Schiff Base Complex Polymer Films. MATERIALS (BASEL, SWITZERLAND) 2021; 15:191. [PMID: 35009337 PMCID: PMC8745840 DOI: 10.3390/ma15010191] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 12/21/2021] [Accepted: 12/22/2021] [Indexed: 11/17/2022]
Abstract
Platinum electrodes were modified with polymers of the (±)-trans-N,N'-bis(salicylidene)-1,2-cyclohexanediaminenickel(II) ([Ni(salcn)]) and (±)-trans-N,N'-bis(3,3'-tert-Bu-salicylidene)-1,2-cyclohexanediaminenickel(II) ([Ni(salcn(Bu))]) complexes to study their electrocatalytic and electroanalytical properties. Poly[Ni(salcn)] and poly[Ni(salcn(Bu))]) modified electrodes catalyze the oxidation of catechol, aspartic acid and NO2-. In the case of poly[Ni(salcn)] modified electrodes, the electrocatalysis process depends on the electroactive surface coverage. The films with low electroactive surface coverage are only a barrier in the path of the reducer to the electrode surface. The films with more electroactive surface coverage ensure both electrocatalysis inside the film and oxidation of the reducer directly on the electrode surface. In the films with the most electroactive surface coverage, electrocatalysis occurs only at the polymer-solution interface. The analysis was based on cyclic voltammetry, EQCM (electrochemical quartz crystal microbalance) and rotating disc electrode method.
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Affiliation(s)
- Danuta Tomczyk
- Department of Inorganic and Analytical Chemistry, University of Łódź, ul. Tamka 12, 91-403 Lodz, Poland;
| | - Wiktor Bukowski
- Faculty of Chemistry, Rzeszów University of Technology, Al. Powstańców W-wy 6, 35-959 Rzeszow, Poland; (W.B.); (K.B.)
| | - Karol Bester
- Faculty of Chemistry, Rzeszów University of Technology, Al. Powstańców W-wy 6, 35-959 Rzeszow, Poland; (W.B.); (K.B.)
| | - Michalina Kaczmarek
- Department of Inorganic and Analytical Chemistry, University of Łódź, ul. Tamka 12, 91-403 Lodz, Poland;
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9
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Metal-organic frameworks based on Schiff base condensation reaction as battery-type electrodes for supercapattery. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2021.138434] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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10
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Electrochemical synthesis and characterization of poly [Ni(CH3Osalen)] with immobilized poly(styrenesulfonate) anion dopants. Electrochim Acta 2021. [DOI: 10.1016/j.electacta.2020.137637] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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11
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Lukyanov DA, Vereshchagin AA, Sizov VV, Kalnin AY, Novoselova JV, Alekseeva EV, Levin OV. Non-sterical stabilization of one-electron-oxidized NiSalen complex by thiophene core. NEW J CHEM 2021. [DOI: 10.1039/d1nj02443d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A combined theoretical/experimental study of the new thiophene-based NiSalen complex with unconjugated bridging fragment. This complex demonstrates unusual stability of the oxidized form, which is not typical for this class of compounds.
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Affiliation(s)
- Daniil A. Lukyanov
- Institute of Chemistry
- Saint Petersburg University
- Peterhof
- Saint Petersburg
- Russia
| | | | - Vladimir V. Sizov
- Institute of Chemistry
- Saint Petersburg University
- Peterhof
- Saint Petersburg
- Russia
| | - Arseniy Y. Kalnin
- Institute of Chemistry
- Saint Petersburg University
- Peterhof
- Saint Petersburg
- Russia
| | - Julia V. Novoselova
- Institute of Chemistry
- Saint Petersburg University
- Peterhof
- Saint Petersburg
- Russia
| | - Elena V. Alekseeva
- Institute of Chemistry
- Saint Petersburg University
- Peterhof
- Saint Petersburg
- Russia
| | - Oleg V. Levin
- Institute of Chemistry
- Saint Petersburg University
- Peterhof
- Saint Petersburg
- Russia
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12
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Novozhilova M, Anischenko D, Chepurnaya I, Dmitrieva E, Malev V, Timonov A, Karushev M. Metal-centered redox activity in a polymeric Cobalt(II) complex of a sterically hindered salen type ligand. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.136496] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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13
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Chepurnaya IA, Karushev MP, Alekseeva EV, Lukyanov DA, Levin OV. Redox-conducting polymers based on metal-salen complexes for energy storage applications. PURE APPL CHEM 2020. [DOI: 10.1515/pac-2019-1218] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Metal-salen polymers are electrochemically active metallopolymers functionalized with multiple redox centers, with a potential for high performance in various fields such as heterogeneous catalysis, chemical sensors, energy conversion, saving, and storage. In light of the growing world demand for the development of superior energy storage systems, the prospects of employing these polymers for advancing the performance of supercapacitors and lithium-ion batteries are particularly interesting. This article provides a general overview of the results of investigating key structure-property relationships of metal-salen polymers and using them to design polymer-modified electrodes with improved energy storage characteristics. The results of independent and collaborative studies conducted by the members of two research groups currently affiliated to the Saint–Petersburg State University and the Ioffe Institute, respectively, along with the related data from other studies are presented in this review.
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Affiliation(s)
| | | | - Elena V. Alekseeva
- Institute of Chemistry, Saint Petersburg State University , Saint Petersburg , Russian Federation
| | - Daniil A. Lukyanov
- Institute of Chemistry, Saint Petersburg State University , Saint Petersburg , Russian Federation
| | - Oleg V. Levin
- Institute of Chemistry, Saint Petersburg State University , Saint Petersburg , Russian Federation
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14
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Yankin AN, Lukyanov DA, Beletskii EV, Bakulina OY, Vlasov PS, Levin OV. Aryl‐Aryl Coupling of Salicylic Aldehydes through Oxidative CH‐activation in Nickel Salen Derivatives. ChemistrySelect 2019. [DOI: 10.1002/slct.201902385] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Andrei N. Yankin
- Institute of ChemistrySaint Petersburg State University, 17/9 Universitetskaya nab. St. Petersburg 199034 Russia
| | - Daniil A. Lukyanov
- Institute of ChemistrySaint Petersburg State University, 17/9 Universitetskaya nab. St. Petersburg 199034 Russia
| | - Evgenii V. Beletskii
- Institute of ChemistrySaint Petersburg State University, 17/9 Universitetskaya nab. St. Petersburg 199034 Russia
| | - Olga Yu. Bakulina
- Institute of ChemistrySaint Petersburg State University, 17/9 Universitetskaya nab. St. Petersburg 199034 Russia
| | - Petr S. Vlasov
- Institute of ChemistrySaint Petersburg State University, 17/9 Universitetskaya nab. St. Petersburg 199034 Russia
| | - Oleg V. Levin
- Institute of ChemistrySaint Petersburg State University, 17/9 Universitetskaya nab. St. Petersburg 199034 Russia
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15
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Banasz R, Wałęsa-Chorab M. Polymeric complexes of transition metal ions as electrochromic materials: Synthesis and properties. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.03.009] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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16
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Novozhilova MV, Smirnova EA, Polozhentseva JA, Danilova JA, Chepurnaya IA, Karushev MP, Malev VV, Timonov AM. Multielectron redox processes in polymeric cobalt complexes with N2O2 Schiff base ligands. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.06.030] [Citation(s) in RCA: 14] [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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17
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Tomczyk D, Bukowski W, Bester K. Redox processes in the solution of Ni(II) complex with salen type ligand and in the polymer films. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.02.051] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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18
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Sreejith S, Mohan N, Prathapachandra Kurup M. Experimental and theoretical investigations on Pd(II) host-guest compound: Deciphering the structural and electronic features of a potential bioactive complex. J Mol Struct 2017. [DOI: 10.1016/j.molstruc.2017.05.068] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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19
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Bikas R, Emami M, Ślepokura K, Noshiranzadeh N. Preparing Mn(iii) salen-type Schiff base complexes using 1,3-oxazines obtained by Mannich condensation: towards removing ortho-hydroxyaldehydes. NEW J CHEM 2017. [DOI: 10.1039/c7nj01562c] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Synthesis of Mn(iii)-salen type Schiff base complexes from 1,3-oxazines obtained from Mannich condensation. This method eliminates the restrictions on the use ofortho-hydroxyaldehydes.
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Affiliation(s)
- Rahman Bikas
- Department of Chemistry
- Faculty of Sciences
- University of Zanjan 45371-38791
- Zanjan
- Iran
| | - Marzieh Emami
- Department of Chemistry
- Faculty of Sciences
- University of Zanjan 45371-38791
- Zanjan
- Iran
| | - Katarzyna Ślepokura
- Faculty of Chemistry
- University of Wroclaw
- Joliot-Curie 14
- Wroclaw 50-383
- Poland
| | - Nader Noshiranzadeh
- Department of Chemistry
- Faculty of Sciences
- University of Zanjan 45371-38791
- Zanjan
- Iran
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