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Burmistrova DA, Pomortseva NP, Voronina YK, Kiskin MA, Dolgushin FM, Berberova NT, Eremenko IL, Poddel’sky AI, Smolyaninov IV. Synthesis, Structure, Electrochemical Properties, and Antioxidant Activity of Organogermanium(IV) Catecholate Complexes. Int J Mol Sci 2024; 25:9011. [PMID: 39201696 PMCID: PMC11354772 DOI: 10.3390/ijms25169011] [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: 07/21/2024] [Revised: 08/09/2024] [Accepted: 08/13/2024] [Indexed: 09/03/2024] Open
Abstract
A series of novel organogermanium(IV) catecholates 1-9 of the general formula R'2Ge(Cat), where R' = Ph, Et, have been synthesized. Compounds were characterized by 1H, 13C NMR, IR spectroscopy, and elemental analysis. The molecular structures of 1-3, 6, and 8 in crystal state were established using single-crystal X-ray analysis. The complexes are tetracoordinate germanium(IV) compounds containing a dioxolene ligand in a dianion (catecholato) form. Electrochemical transformations of target germanium(IV) complexes have been studied by cyclic voltammetry. The electro-oxidation mechanism of complexes 1-5, 7, and 10 (the related complex Ph2Ge(3,5-Cat) where 3,5-Cat is 3,5-di-tert-butylcatecholate) involves the consecutive formation of mono- and dicationic derivatives containing the oxidized forms of redox-active ligands. The stability of the generated monocations depends both on the hydrocarbon groups at the germanium atom and on the substituents in the catecholate ring. Compounds 6, 8, and 9 are oxidized irreversibly under the electrochemical conditions with the formation of unstable complexes. The radical scavenging activity and antioxidant properties of new complexes were estimated in the reaction with DPPH radical, ABTS radical cation, and CUPRACTEAC assay. It has been found that compounds 8 and 9 with benzothiazole or phenol fragments are more active in DPPH test. The presence of electron-rich moieties in the catecholate ligand makes complexes 5 and 7-9 more reactive to ABTS radical cation. The value of CUPRACTEAC for organogermanium(IV) catecholates varies from 0.23 to 1.45. The effect of compounds 1-9 in the process of lipid peroxidation of rat liver (Wistar) homogenate was determined in vitro. It was found that most compounds are characterized by pronounced antioxidant activity. A feature of complexes 1, 3, and 5-9 is the intensification of the antioxidant action with the incubation time. In the presence of additives of complexes 3, 5, 6, and 8, an induction period was observed during the process of lipid peroxidation.
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Affiliation(s)
- Daria A. Burmistrova
- Chemistry Department, Astrakhan State Technical University, 16 Tatisheva Str., 414056 Astrakhan, Russia; (D.A.B.); (N.P.P.); (N.T.B.)
| | - Nadezhda P. Pomortseva
- Chemistry Department, Astrakhan State Technical University, 16 Tatisheva Str., 414056 Astrakhan, Russia; (D.A.B.); (N.P.P.); (N.T.B.)
| | - Yulia K. Voronina
- N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russia; (Y.K.V.); (M.A.K.); (F.M.D.); (I.L.E.)
| | - Mikhail A. Kiskin
- N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russia; (Y.K.V.); (M.A.K.); (F.M.D.); (I.L.E.)
| | - Fedor M. Dolgushin
- N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russia; (Y.K.V.); (M.A.K.); (F.M.D.); (I.L.E.)
| | - Nadezhda T. Berberova
- Chemistry Department, Astrakhan State Technical University, 16 Tatisheva Str., 414056 Astrakhan, Russia; (D.A.B.); (N.P.P.); (N.T.B.)
| | - Igor L. Eremenko
- N.S. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, 119991 Moscow, Russia; (Y.K.V.); (M.A.K.); (F.M.D.); (I.L.E.)
| | - Andrey I. Poddel’sky
- Institute of Inorganic Chemistry, University of Tübingen, Auf der Morgenstelle 18, 72076 Tübingen, Germany
| | - Ivan V. Smolyaninov
- Chemistry Department, Astrakhan State Technical University, 16 Tatisheva Str., 414056 Astrakhan, Russia; (D.A.B.); (N.P.P.); (N.T.B.)
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Bubnov MP, Zolotukhin AA, Fukin GK, Rumyantcev RV, Bogomyakov AS. Valence tautomeric interconversion of bis-dioxolene cobalt complex with imino-pyridine functionalized by TEMPO moiety in solid solutions with isostructural nickel analogue: phase transitions and monocrystal destruction. Dalton Trans 2024; 53:9151-9160. [PMID: 38742270 DOI: 10.1039/d4dt00453a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2024]
Abstract
Valence tautomeric complexes (VT) are promising systems for creating molecular devices. From this viewpoint, valence tautomeric complexes with a hysteresis loop on the magnetic curve are of special interest as potential memory elements. The hysteresis loop is a consequence of retarded structural rearrangements which investigation is an actual problem. Recently, we have described a new VT transition taking place in a bis-dioxolene cobalt complex with imino-pyridine having a TEMPO substituent (A. A. Zolotukhin, et al., Inorg. Chem., 2017, 56, 14751-14754). Valence tautomeric transformation occurs with a hysteresis loop and is accompanied by a phase transition. The phase transition taking place during cooling is accompanied by crystal destruction. This fact makes it impossible to monitor the structural changes responsible for the hysteresis loop. The current research attempts to resolve this problem. A nickel compound of the same composition (TEMPO-imino-pyridine)Ni(3,6-DBSQ)2 was synthesized and characterized. It was established to be isostructural with the cobalt complex. It was used as an inert matrix for the dilution of the VT cobalt complex. The number of solid solutions with Co/Ni ratios of 1 : 1, 1 : 2, 1 : 4, and 1 : 8 was obtained. Variable temperature magnetic susceptibility measurements show that VT transformation with a hysteresis loop takes place in all solid solutions. The hysteresis loop is shifted to low temperatures primarily due to the shifting of its low-temperature boundary with dilution. The hysteresis width does not change significantly with dilution. DSC detected that transformations are accompanied by phase transitions at different temperatures at cooling and heating. The phase transition at the first cooling occurs at slightly lower temperatures compared with subsequent cycles. These temperatures correspond to the transition temperatures detected from the magnetic curves. The phase transition during the first cooling is accompanied by crystal destruction. Physical destruction takes place in the crystals of all solid solutions. X-ray diffraction powder patterns confirm that phase transition is accompanied by considerable reorganization of the crystal structure typical for the first order transitions. The unit cell volume of solid solutions is larger than that of pure complexes. Especially calculated crystal invariom indicated that the "lattice energy" in a solid solution is the lowest compared with that in "pure" nickel and cobalt complexes.
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Affiliation(s)
- Michael P Bubnov
- G. A. Razuvaev Institute of Organometallic Chemistry of RAS, 49 Tropinina Str., GSP-445, 603950 Nizhny Novgorod, Russia.
| | - Alexey A Zolotukhin
- G. A. Razuvaev Institute of Organometallic Chemistry of RAS, 49 Tropinina Str., GSP-445, 603950 Nizhny Novgorod, Russia.
| | - Georgy K Fukin
- G. A. Razuvaev Institute of Organometallic Chemistry of RAS, 49 Tropinina Str., GSP-445, 603950 Nizhny Novgorod, Russia.
| | - Roman V Rumyantcev
- G. A. Razuvaev Institute of Organometallic Chemistry of RAS, 49 Tropinina Str., GSP-445, 603950 Nizhny Novgorod, Russia.
| | - Artem S Bogomyakov
- International Tomography Center of the SB of RAS, Institutskaya Str., 3a, Novosibirsk 630090, Russia.
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Lukina DA, Skatova AA, Rumyantcev RV, Demeshko SV, Meyer F, Fedushkin IL. Gradual solid-state redox-isomerism in the lanthanide series. Dalton Trans 2024; 53:8850-8856. [PMID: 38717191 DOI: 10.1039/d4dt00484a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/22/2024]
Abstract
Oxidation of [(ArBIG-bian)2-Yb2+(dme)] (1) (ArBIG-bian = 1,2-bis[(2,6-dibenzhydryl-4-methylphenyl)imino]acenaphthene; dme = 1,2-dimethoxyethane) by 0.5 equivalent of Me2NC(S)S-S(S)CNMe2 in dme at ambient temperature affords a mixture of two products, [(ArBIG-bian)2-Yb3+{SC(S)NMe2}1-(dme)] and [(ArBIG-bian)1-Yb2+{SC(S)NMe2}1-(dme)], which represent two redox-isomers (2a and 2b, respectively). Their ratio in solution depends on the solvent as well as on the temperature. In the solid state, a decrease of temperature (350 → 100 K) caused an electron transfer from the Yb2+ ion to the ArBIG-bian radical-anion in isomer 2b to afford isomer 2a. Accordingly, the ratio of isomers 2a and 2b changes from 1 : 1 (350 K) to 3 : 1 (100 K). In contrast, in the dimer [(dme)(dpp-bian)1-Yb2+(μ-Cl)2Yb3+(dpp-bian)2-(dme)] (dpp-bian = 1,2-bis[(2,6-diisopropylphenyl)imino]acenaphthene), which is the sole example of a lanthanide complex that reveals solid-state redox-isomerism (valence tautomerism) reported so far, the electron transfer from the Yb2+ ion to the dpp-bian radical-anion takes place at around 150 K and is completed within a temperature interval of ca. 7 K.
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Affiliation(s)
- Daria A Lukina
- G. A. Razuvaev Institute of Organometallic Chemistry of the Russian Academy of Sciences, Tropinina Str. 49, Nizhny Novgorod, 603137, Russian Federation.
| | - Alexandra A Skatova
- G. A. Razuvaev Institute of Organometallic Chemistry of the Russian Academy of Sciences, Tropinina Str. 49, Nizhny Novgorod, 603137, Russian Federation.
| | - Roman V Rumyantcev
- G. A. Razuvaev Institute of Organometallic Chemistry of the Russian Academy of Sciences, Tropinina Str. 49, Nizhny Novgorod, 603137, Russian Federation.
| | - Serhiy V Demeshko
- Institut für Anorganische Chemie, Georg-August-Universität Tammannstrasse 4, Göttingen 37077, Germany
| | - Franc Meyer
- Institut für Anorganische Chemie, Georg-August-Universität Tammannstrasse 4, Göttingen 37077, Germany
| | - Igor L Fedushkin
- G. A. Razuvaev Institute of Organometallic Chemistry of the Russian Academy of Sciences, Tropinina Str. 49, Nizhny Novgorod, 603137, Russian Federation.
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Abstract
Heteroatom-centered diradical(oid)s have been in the focus of molecular main group chemistry for nearly 30 years. During this time, the diradical concept has evolved and the focus has shifted to the rational design of diradical(oid)s for specific applications. This review article begins with some important theoretical considerations of the diradical and tetraradical concept. Based on these theoretical considerations, the design of diradical(oid)s in terms of ligand choice, steric, symmetry, electronic situation, element choice, and reactivity is highlighted with examples. In particular, heteroatom-centered diradical reactions are discussed and compared with closed-shell reactions such as pericyclic additions. The comparison between closed-shell reactivity, which proceeds in a concerted manner, and open-shell reactivity, which proceeds in a stepwise fashion, along with considerations of diradical(oid) design, provides a rational understanding of this interesting and unusual class of compounds. The application of diradical(oid)s, for example in small molecule activation or as molecular switches, is also highlighted. The final part of this review begins with application-related details of the spectroscopy of diradical(oid)s, followed by an update of the heteroatom-centered diradical(oid)s and tetraradical(oid)s published in the last 10 years since 2013.
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Affiliation(s)
- Alexander Hinz
- Institut für Anorganische Chemie (AOC), Karlsruher Institut für Technologie (KIT), Engesserstrasse 15, 76131 Karlsruhe, Germany
| | - Jonas Bresien
- Institut für Chemie, Universität Rostock, Albert-Einstein-Strasse 3a, 18059 Rostock, Germany
| | - Frank Breher
- Institut für Anorganische Chemie (AOC), Karlsruher Institut für Technologie (KIT), Engesserstrasse 15, 76131 Karlsruhe, Germany
| | - Axel Schulz
- Institut für Chemie, Universität Rostock, Albert-Einstein-Strasse 3a, 18059 Rostock, Germany
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Kusama H, Kodera M, Sayama K. Selective Oxidation of Sulfuric Acid to Peroxydisulfuric Acid on a Tungsten Trioxide Anode. ChemistrySelect 2023. [DOI: 10.1002/slct.202300114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
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Schorpp M, Yadav R, Roth D, Greb L. Calix[4]pyrrolato Stibenium: Lewis Superacidity by Antimony(III)-Antimony(V) Electromerism. Angew Chem Int Ed Engl 2022; 61:e202207963. [PMID: 35925742 DOI: 10.1002/anie.202207963] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Indexed: 01/07/2023]
Abstract
Lewis superacids enable the activation of highly inert substrates. However, the permanent presence of a Lewis superacidic center comes along with a constantly increased intolerance toward functional groups or ambient conditions. Herein, we describe a strategy to unleash Lewis superacidity by electromerism. Experimental and computational results indicate that coordinating a Lewis base to Δ-calix[4]pyrrolato-antimony(III) triggers a ligand redox-noninnocent coupled transfer into antimony(V)-state that exhibits Lewis superacidic features. Lewis acidity by electromerism establishes a concept of potential generality for powerful yet robust reagents and on-site substrate activation approaches.
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Affiliation(s)
- Marcel Schorpp
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Ravi Yadav
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Daniel Roth
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Lutz Greb
- Department of Chemistry and Biochemistry-Inorganic Chemistry, Freie Universität Berlin, Fabeckstr. 34/36, 14195, Berlin, Germany
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Schorpp M, Yadav R, Roth D, Greb L. Calix[4]pyrrolato Stibenium: Lewis Superacidity by Antimony(III)‐Antimony(V) Electromerism. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202207963] [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)
- Marcel Schorpp
- Ruprecht Karls Universitat Heidelberg Anorganisch-Chemisches Institut GERMANY
| | - Ravi Yadav
- Ruprecht Karls Universitat Heidelberg Anorganisch-Chemisches Institut GERMANY
| | - Daniel Roth
- Ruprecht Karls Universitat Heidelberg Anorganisch-Chemisches Institut GERMANY
| | - Lutz Greb
- Freie Universitat Berlin Institut für Chemie und Biochemie, Anorganische Chemie Institut für Anorganische ChemieFabeckstr. 34-36 14195 Berlin GERMANY
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Starikova AA, Chegerev MG, Starikov AG, Minkin VI. o-Benzoquinone Cobalt Complexes Bearing Organosilicon Radicals: Quantum-Chemical Study. RUSS J COORD CHEM+ 2022. [DOI: 10.1134/s1070328422040054] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Greb L. Valence Tautomerism of p-Block Element Compounds - An Eligible Phenomenon for Main Group Catalysis? Eur J Inorg Chem 2022; 2022:e202100871. [PMID: 35910784 PMCID: PMC9306562 DOI: 10.1002/ejic.202100871] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 11/12/2021] [Indexed: 01/03/2023]
Abstract
Valence tautomerism has had a remarkable impact on several branches of transition metal chemistry. By switching between different valence tautomeric states, physicochemical properties and reactivities can be triggered reversibly. Is this phenomenon transferrable into the p-block - or is it already happening there? This Perspective collects observations of p-block element-ligand systems that might be assignable to valence tautomerism. Further, it discusses occurrences in p-block element compounds that exhibit the related effect of redox-induced electron transfer. As disclosed, the concept of valence tautomerism with p-block elements is at a very early stage. However, given the substantial disparity in the properties of those elements in different redox states, it might offer a valid extension for future developments in main group catalysis.
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Affiliation(s)
- Lutz Greb
- Anorganische ChemieFreie Universität BerlinFabeckstr. 34–3614195BerlinGermany
- Anorganisch-Chemisches InstitutUniversität HeidelbergIm Neuenheimer Feld 27069120HeidelbergGermany
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Computational search for redox isomerism in Ge and Sn bis-chelates with α-diimine ligands. MENDELEEV COMMUNICATIONS 2022. [DOI: 10.1016/j.mencom.2022.01.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Starikov AG, Starikova AA, Chegerev MG, Aldoshin SM, Metelitsa AV, Minkin VI. Spin‐State‐Switching Rearrangements of Bis(dioxolene)‐Bridged CrCo Complexes: A DFT Study. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Andrey G. Starikov
- Institute of Physical and Organic Chemistry Southern Federal University 194/2 Stachka Avenue 344090 Rostov-on-Don Russian Federation
| | - Alyona A. Starikova
- Institute of Physical and Organic Chemistry Southern Federal University 194/2 Stachka Avenue 344090 Rostov-on-Don Russian Federation
| | - Maxim G. Chegerev
- Institute of Physical and Organic Chemistry Southern Federal University 194/2 Stachka Avenue 344090 Rostov-on-Don Russian Federation
| | - Sergey M. Aldoshin
- Institute of Problems of Chemical Physics Russian Academy of Sciences 1 Acad. Semenov Avenue 142432 Chernogolovka Russian Federation
| | - Anatoly V. Metelitsa
- Institute of Physical and Organic Chemistry Southern Federal University 194/2 Stachka Avenue 344090 Rostov-on-Don Russian Federation
| | - Vladimir I. Minkin
- Institute of Physical and Organic Chemistry Southern Federal University 194/2 Stachka Avenue 344090 Rostov-on-Don Russian Federation
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Janetzki JT, Zahir FZM, Gable RW, Phonsri W, Murray KS, Goerigk L, Boskovic C. A Convenient DFT-Based Strategy for Predicting Transition Temperatures of Valence Tautomeric Molecular Switches. Inorg Chem 2021; 60:14475-14487. [PMID: 34494829 DOI: 10.1021/acs.inorgchem.1c02273] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The ability to identify promising candidate switchable molecules computationally, prior to synthesis, represents a considerable advance in the development of switchable molecular materials. Even more useful would be the possibility of predicting the switching temperature. Cobalt-dioxolene complexes can exhibit thermally induced valence tautomeric switching between low-spin CoIII-catecholate and high-spin CoII-semiquinonate forms, where the half-temperature (T1/2) is the temperature at which there are equal amounts of the two tautomers. We report the first simple computational strategy for accurately predicting T1/2 values for valence tautomeric complexes. Dispersion-corrected density functional theory (DFT) methods have been applied to the [Co(dbdiox)(dbsq)(N2L)] (dbdiox/dbsq•- = 3,5-di-tert-butyldioxolene/semiquinonate; N2L = diimine) family of valence tautomeric complexes, including the newly reported [Co(dbdiox)(dbsq)(MeO-bpy)] (1) (MeO-bpy = 4,4'-dimethoxy-2,2'-bipyridine). The DFT strategy has been thoroughly benchmarked to experimental data, affording highly accurate spin-distributions and an excellent energy match between experimental and calculated spin-states. Detailed orbital analysis of the [Co(dbdiox)(dbsq)(N2L)] complexes has revealed that the diimine ligand tunes the T1/2 value primarily through π-acceptance. We have established an excellent correlation between experimental T1/2(toluene) values for [Co(dbdiox)(dbsq)(N2L)] complexes and the calculated lowest unoccupied molecular orbital energy of the corresponding diimine ligand. The model affords accurate T1/2(toluene) values for [Co(dbdiox)(dbsq)(N2L)] complexes, with an average error of only 3.7%. This quantitative and simple DFT strategy allows experimentalists to not only rapidly identify proposed VT complexes but also predict the transition temperature. This study lays the groundwork for future in silico screening of candidate switchable molecules prior to experimental investigation, with associated time, cost, and environmental benefits.
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Affiliation(s)
- Jett T Janetzki
- School of Chemistry, University of Melbourne, Victoria 3010, Australia
| | - F Zahra M Zahir
- School of Chemistry, University of Melbourne, Victoria 3010, Australia
| | - Robert W Gable
- School of Chemistry, University of Melbourne, Victoria 3010, Australia
| | - Wasinee Phonsri
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Keith S Murray
- School of Chemistry, Monash University, Clayton, Victoria 3800, Australia
| | - Lars Goerigk
- School of Chemistry, University of Melbourne, Victoria 3010, Australia
| | - Colette Boskovic
- School of Chemistry, University of Melbourne, Victoria 3010, Australia
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Guda AA, Chegerev M, Starikov AG, Vlasenko VG, Zolotukhin AA, Bubnov MP, Cherkasov VK, Shapovalov VV, Rusalev YV, Tereshchenko AA, Trigub AL, Chernyshev AV, Soldatov AV. Valence tautomeric transition of bis(o-dioxolene) cobalt complex in solid state and solution. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2021; 33:215405. [PMID: 33588394 DOI: 10.1088/1361-648x/abe650] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Accepted: 02/15/2021] [Indexed: 06/12/2023]
Abstract
Valence tautomer transition occurs mainly in 3d metalorganic complexes with redox-active ligands and makes them potential candidates for single-molecular switches. The transition occurs under temperature, pressure, or light-induced stimuli and is strongly affected by the intermolecular interactions. However single-crystal x-ray diffraction is not always applicable to such systems when crystal structure is destroyed upon transition or system is studied in the solution. Such an example is bis(o-semiquinonato) cobalt complex with TEMPO-functionalized iminopyridine ancillary ligand. In this work we apply two complementary techniques-ligand-sensitive Fourier transform infrared spectroscopy (FTIR) and metal sensitive Co K-edge x-ray absorption spectroscopy (XAS). In a solid state, a temperature hysteresis of magnetization larger than 40 K was observed upon cyclic cooling-heating. So, the temperature of phase transition upon cooling is about 40 K lower than that upon heating. In solution, the x-ray absorption spectra for high-temperature and low-temperature states were similar to that in the solid form, but the hysteresis was absent. Two methods are can probe valence tautomer transition, but XAS has an advantage for the liquid phase analysis and FTIR has larger sensitivity to the ligand related interactions in solid.
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Affiliation(s)
- A A Guda
- The Smart Materials Research Institute, Sladkova 178/24, 344090 Rostov-on-Don, Russia
| | - M Chegerev
- Institute of Physical and Organic Chemistry, Southern Federal University, Stachki Avenue, 194/2, 344090, Rostov-on-Don, Russia
| | - A G Starikov
- Institute of Physical and Organic Chemistry, Southern Federal University, Stachki Avenue, 194/2, 344090, Rostov-on-Don, Russia
| | - V G Vlasenko
- Institute of Physics, Southern Federal University, Stachki Avenue, 194, 344090, Rostov-on-Don, Russia
| | - A A Zolotukhin
- G. A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences, 49 Tropinina Str., GSP-445, 603950 Nizhny Novgorod, Russia
| | - M P Bubnov
- G. A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences, 49 Tropinina Str., GSP-445, 603950 Nizhny Novgorod, Russia
| | - V K Cherkasov
- G. A. Razuvaev Institute of Organometallic Chemistry, Russian Academy of Sciences, 49 Tropinina Str., GSP-445, 603950 Nizhny Novgorod, Russia
| | - V V Shapovalov
- The Smart Materials Research Institute, Sladkova 178/24, 344090 Rostov-on-Don, Russia
| | - Yu V Rusalev
- The Smart Materials Research Institute, Sladkova 178/24, 344090 Rostov-on-Don, Russia
| | - A A Tereshchenko
- The Smart Materials Research Institute, Sladkova 178/24, 344090 Rostov-on-Don, Russia
| | - A L Trigub
- National Research Center 'Kurchatov Institute', 1 Akademika Kurchatova pl., 123098 Moscow, Russia
| | - A V Chernyshev
- Institute of Physical and Organic Chemistry, Southern Federal University, Stachki Avenue, 194/2, 344090, Rostov-on-Don, Russia
| | - A V Soldatov
- The Smart Materials Research Institute, Sladkova 178/24, 344090 Rostov-on-Don, Russia
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Vlasenko VG, Guda AA, Starikov AG, Chegerev MG, Piskunov AV, Ershova IV, Trigub AL, Tereshchenko AA, Rusalev YV, Kubrin SP, Soldatov AV. Structural Changes in Five‐Coordinate Bromido‐bis(o‐iminobenzo‐semiquinonato)iron(III) Complex: Spin‐Crossover or Ligand‐Metal Antiferromagnetic Interactions? Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202001033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Valery G. Vlasenko
- Research Institute of Physics Southern Federal University 194 Stachki Ave. 344090 Rostov-on-Don Russia
| | - Alexander A. Guda
- The Smart Materials Research Institute Southern Federal University 178/24 A. Sladkova street 344090 Rostov-on-Don Russia
| | - Andrey G. Starikov
- Institute of Physical and Organic Chemistry Southern Federal University 194/2 Stachki Ave. 344090 Rostov-on-Don Russia
| | - Maxim G. Chegerev
- Institute of Physical and Organic Chemistry Southern Federal University 194/2 Stachki Ave. 344090 Rostov-on-Don Russia
| | - Alexander V. Piskunov
- G. A. Razuvaev Institute of Organometallic Chemistry Russian Academy of Sciences 49 Tropinina Str. 603950 Nizhny Novgorod Russia
| | - Irina V. Ershova
- G. A. Razuvaev Institute of Organometallic Chemistry Russian Academy of Sciences 49 Tropinina Str. 603950 Nizhny Novgorod Russia
| | - Alexander L. Trigub
- National Research Center “Kurchatov Institute” 1 pl. Academician Kurchatov 123182 Moscow Russia
| | - Andrei A. Tereshchenko
- The Smart Materials Research Institute Southern Federal University 178/24 A. Sladkova street 344090 Rostov-on-Don Russia
| | - Yurii V. Rusalev
- The Smart Materials Research Institute Southern Federal University 178/24 A. Sladkova street 344090 Rostov-on-Don Russia
| | - Stanislav P. Kubrin
- Research Institute of Physics Southern Federal University 194 Stachki Ave. 344090 Rostov-on-Don Russia
| | - Alexander V. Soldatov
- The Smart Materials Research Institute Southern Federal University 178/24 A. Sladkova street 344090 Rostov-on-Don Russia
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15
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Arsenyeva KV, Pashanova KI, Trofimova OY, Ershova IV, Chegerev MG, Starikova AA, Cherkasov AV, Syroeshkin MA, Kozmenkova AY, Piskunov AV. O,N-Heterocyclic germylenes as efficient catalysts for hydroboration and cyanosilylation of benzaldehyde. NEW J CHEM 2021. [DOI: 10.1039/d1nj01644j] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Novel O,N-heterocyclic germylenes were examined as catalysts for cyanosilylation and hydroboration of benzaldehyde.
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Affiliation(s)
- Kseniya V. Arsenyeva
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences
- Nizhny Novgorod
- Russian Federation
| | - Kira I. Pashanova
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences
- Nizhny Novgorod
- Russian Federation
| | - Olesya Yu. Trofimova
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences
- Nizhny Novgorod
- Russian Federation
| | - Irina V. Ershova
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences
- Nizhny Novgorod
- Russian Federation
| | - Maxim G. Chegerev
- Institute of Physical and Organic Chemistry at Southern Federal University
- Rostov-on-Don
- Russian Federation
| | - Alyona A. Starikova
- Institute of Physical and Organic Chemistry at Southern Federal University
- Rostov-on-Don
- Russian Federation
| | - Anton V. Cherkasov
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences
- Nizhny Novgorod
- Russian Federation
| | - Mikhail A. Syroeshkin
- N. D. Zelinsky Institute of Organic Chemistry of Russian Academy of Sciences
- Moscow
- Russian Federation
| | - Anna Ya. Kozmenkova
- N. D. Zelinsky Institute of Organic Chemistry of Russian Academy of Sciences
- Moscow
- Russian Federation
| | - Alexandr V. Piskunov
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences
- Nizhny Novgorod
- Russian Federation
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16
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Minkin VI, Starikov AG, Starikova AA, Gapurenko OA, Minyaev RM, Boldyrev AI. Electronic structure and magnetic properties of the triangular nanographenes with radical substituents: a DFT study. Phys Chem Chem Phys 2020; 22:1288-1298. [DOI: 10.1039/c9cp05922a] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
DFT modeling of triangular polycyclic hydrocarbons bearing radicals provided insights into dependence of electronic ground states on their structural peculiarities
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Affiliation(s)
- Vladimir I. Minkin
- Institute of Physical and Organic Chemistry at Southern Federal University
- Rostov-on-Don
- Russia
| | - Andrey G. Starikov
- Institute of Physical and Organic Chemistry at Southern Federal University
- Rostov-on-Don
- Russia
| | - Alyona A. Starikova
- Institute of Physical and Organic Chemistry at Southern Federal University
- Rostov-on-Don
- Russia
| | - Olga A. Gapurenko
- Institute of Physical and Organic Chemistry at Southern Federal University
- Rostov-on-Don
- Russia
| | - Ruslan M. Minyaev
- Institute of Physical and Organic Chemistry at Southern Federal University
- Rostov-on-Don
- Russia
| | - Alexander I. Boldyrev
- Institute of Physical and Organic Chemistry at Southern Federal University
- Rostov-on-Don
- Russia
- Department of Chemistry and Biochemistry
- Utah State University
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17
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Ershova IV, Smolyaninov IV, Bogomyakov AS, Fedin MV, Starikov AG, Cherkasov AV, Fukin GK, Piskunov AV. Tetrahedral nickel(ii) and cobalt(ii) bis-o-iminobenzosemiquinonates. Dalton Trans 2019; 48:10723-10732. [DOI: 10.1039/c9dt01424a] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first examples of tetrahedral nickel(ii) and cobalt(ii) bis-o-iminobenzosemiquinonates.
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Affiliation(s)
- Irina V. Ershova
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences
- 603950 Nizhny Novgorod
- Russian Federation
| | - Ivan V. Smolyaninov
- Southern Scientific Center of Russian Academy of Sciences
- 344006 Rostov on Don
- Russian Federation
| | - Artem S. Bogomyakov
- International Tomography Center
- Siberian Branch of the Russian Academy of Sciences
- 630090 Novosibirsk
- Russian Federation
| | - Matvey V. Fedin
- International Tomography Center
- Siberian Branch of the Russian Academy of Sciences
- 630090 Novosibirsk
- Russian Federation
| | - Andrey G. Starikov
- Institute of Physical and Organic Chemistry at Southern Federal University
- 344090 Rostov-on-Don
- Russian Federation
| | - Anton V. Cherkasov
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences
- 603950 Nizhny Novgorod
- Russian Federation
| | - Georgy K. Fukin
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences
- 603950 Nizhny Novgorod
- Russian Federation
| | - Alexandr V. Piskunov
- G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences
- 603950 Nizhny Novgorod
- Russian Federation
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18
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Petrov PA, Sukhikh TS, Nadolinny VA, Bogomyakov AS, Laricheva YA, Piskunov AV. Di- tert-butylcatecholate derivatives of titanocene. NEW J CHEM 2019. [DOI: 10.1039/c9nj00771g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
Titanocene dichloride reacts with sodium 3,5-di-tert-butyl-catecholate to give the mixed-valence binuclear Ti(iii,iv) complex Cp2Ti(μ-Cat35)2TiCp.
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Affiliation(s)
- Pavel A. Petrov
- Nikolaev Institute of Inorganic Chemistry
- Siberian Branch of Russian Academy of Sciences
- 630090 Novosibirsk
- Russia
- Novosibirsk State University
| | - Taisiya S. Sukhikh
- Nikolaev Institute of Inorganic Chemistry
- Siberian Branch of Russian Academy of Sciences
- 630090 Novosibirsk
- Russia
- Novosibirsk State University
| | - Vladimir A. Nadolinny
- Nikolaev Institute of Inorganic Chemistry
- Siberian Branch of Russian Academy of Sciences
- 630090 Novosibirsk
- Russia
| | - Artem S. Bogomyakov
- International Tomography Centre
- Siberian Branch of Russian Academy of Sciences
- Novosibirsk
- Russia
| | - Yuliya A. Laricheva
- Nikolaev Institute of Inorganic Chemistry
- Siberian Branch of Russian Academy of Sciences
- 630090 Novosibirsk
- Russia
| | - Alexandr V. Piskunov
- G.A. Razuvaev Institute of Organometallic Chemistry
- Russian Academy of Sciences
- Nizhny Novgorod
- Russia
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19
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Chegerev MG, Piskunov AV, Starikova AA, Kubrin SP, Fukin GK, Cherkasov VK, Abakumov GA. Redox Isomerism in Main‐Group Chemistry: Tin Complex with
o
‐Iminoquinone Ligands. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201701361] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Maxim G. Chegerev
- G. A. Razuvaev Institute of Organometallic Chemistry Tropinina str. 49 603950 Nizhny Novgorod Russia
| | - Alexandr V. Piskunov
- G. A. Razuvaev Institute of Organometallic Chemistry Tropinina str. 49 603950 Nizhny Novgorod Russia
| | - Alyona A. Starikova
- Institute of Physical and Organic Chemistry at Southern Federal University Stachka Avenue 194/ 2 344090 Rostov‐on‐Don Russia
| | - Stanislav P. Kubrin
- Research Institute of Physics Southern Federal University Stachka Avenue 194 344090 Rostov‐on‐Don Russia
| | - Georgy K. Fukin
- G. A. Razuvaev Institute of Organometallic Chemistry Tropinina str. 49 603950 Nizhny Novgorod Russia
| | - Vladimir K. Cherkasov
- G. A. Razuvaev Institute of Organometallic Chemistry Tropinina str. 49 603950 Nizhny Novgorod Russia
| | - Gleb A. Abakumov
- G. A. Razuvaev Institute of Organometallic Chemistry Tropinina str. 49 603950 Nizhny Novgorod Russia
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20
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Chegerev MG, Piskunov AV, Maleeva AV, Fukin GK, Abakumov GA. Multiple Reactivity of SnIIComplexes Bearing Catecholate ando-Amidophenolate Ligands. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600501] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Maxim G. Chegerev
- G. A. Razuvaev Institute of Organometallic Chemistry; Russian Academy of Sciences; Laboratory of Organoelement Compounds; Tropinina Street 49 603950 Nizhny Novgorod Russian Federation
| | - Alexander V. Piskunov
- G. A. Razuvaev Institute of Organometallic Chemistry; Russian Academy of Sciences; Laboratory of Organoelement Compounds; Tropinina Street 49 603950 Nizhny Novgorod Russian Federation
| | - Aryna V. Maleeva
- G. A. Razuvaev Institute of Organometallic Chemistry; Russian Academy of Sciences; Laboratory of Organoelement Compounds; Tropinina Street 49 603950 Nizhny Novgorod Russian Federation
| | - Georgy K. Fukin
- G. A. Razuvaev Institute of Organometallic Chemistry; Russian Academy of Sciences; Laboratory of Organoelement Compounds; Tropinina Street 49 603950 Nizhny Novgorod Russian Federation
| | - Gleb A. Abakumov
- G. A. Razuvaev Institute of Organometallic Chemistry; Russian Academy of Sciences; Laboratory of Organoelement Compounds; Tropinina Street 49 603950 Nizhny Novgorod Russian Federation
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