E. Gorbachev, E. Kozlyakova, L. Trusov, A. Sleptsova, M. Zykin, P. Kazin
The review is devoted to compounds and materials demonstrating extremely high magnetic hardness. The recent advances in the synthesis of modern materials for permanent magnets are considered, and a range of exotic compounds interesting for fundamental research is described. The key details of chemical composition, crystal structure and magnetic microstructure responsible for the appearance of high magnetic anisotropy and giant coercivity are analyzed. The challenges of developing the title materials are noted and strategies for their solution are discussed. The bibliography includes 389 references.
{"title":"Design of modern magnetic materials with giant coercivity","authors":"E. Gorbachev, E. Kozlyakova, L. Trusov, A. Sleptsova, M. Zykin, P. Kazin","doi":"10.1070/RCR4989","DOIUrl":"https://doi.org/10.1070/RCR4989","url":null,"abstract":"The review is devoted to compounds and materials demonstrating extremely high magnetic hardness. The recent advances in the synthesis of modern materials for permanent magnets are considered, and a range of exotic compounds interesting for fundamental research is described. The key details of chemical composition, crystal structure and magnetic microstructure responsible for the appearance of high magnetic anisotropy and giant coercivity are analyzed. The challenges of developing the title materials are noted and strategies for their solution are discussed. The bibliography includes 389 references.","PeriodicalId":21523,"journal":{"name":"Russian Chemical Reviews","volume":"90 1","pages":"1287 - 1329"},"PeriodicalIF":7.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59009330","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. N. Ryazantsev, Daniil M. Strashkov, Dmitrii M. Nikolaev, A. A. Shtyrov, M. Panov
Photopharmacology is a field of medicine and pharmacology that uses light to selectively activate or deactivate pharmaceutical agents. This approach significantly enhances and localizes the drug action and, therefore, reduces its side effects. Apart from the bioactive moiety, any photopharmacological compound should contain a photoactive group that must absorb light at the desired wavelength and reorganize the molecular structure after photoactivation. The design of an effective photopharmacological compound requires careful tuning of physical, chemical, and biological properties. The present review summarizes and analyzes the main approaches to the molecular design of photopharmacological drugs based on azobenzene or azoheteroarenes. The main ideas and methods used for tuning spectral and photochemical properties of compounds of this class are discussed. A comparative analysis of main computational methods for their in silico screening is carried out; the most common approaches to the synthesis of azobenzenes and azoheteroarenes derivatives are systematized. Special attention is given to the methods and approaches that are specific to the molecular design of photopharmacological compounds with required physicochemical and photochemical properties. The bibliography includes 212 references.
{"title":"Photopharmacological compounds based on azobenzenes and azoheteroarenes: principles of molecular design, molecular modelling, and synthesis","authors":"M. N. Ryazantsev, Daniil M. Strashkov, Dmitrii M. Nikolaev, A. A. Shtyrov, M. Panov","doi":"10.1070/RCR5001","DOIUrl":"https://doi.org/10.1070/RCR5001","url":null,"abstract":"Photopharmacology is a field of medicine and pharmacology that uses light to selectively activate or deactivate pharmaceutical agents. This approach significantly enhances and localizes the drug action and, therefore, reduces its side effects. Apart from the bioactive moiety, any photopharmacological compound should contain a photoactive group that must absorb light at the desired wavelength and reorganize the molecular structure after photoactivation. The design of an effective photopharmacological compound requires careful tuning of physical, chemical, and biological properties. The present review summarizes and analyzes the main approaches to the molecular design of photopharmacological drugs based on azobenzene or azoheteroarenes. The main ideas and methods used for tuning spectral and photochemical properties of compounds of this class are discussed. A comparative analysis of main computational methods for their in silico screening is carried out; the most common approaches to the synthesis of azobenzenes and azoheteroarenes derivatives are systematized. Special attention is given to the methods and approaches that are specific to the molecular design of photopharmacological compounds with required physicochemical and photochemical properties. The bibliography includes 212 references.","PeriodicalId":21523,"journal":{"name":"Russian Chemical Reviews","volume":"90 1","pages":"868 - 893"},"PeriodicalIF":7.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59009750","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The review summarizes the data on the structures and methods for the synthesis of compounds with anticancer activity based on biogenic metals, which can replace platinum drugs prevailing in cytotoxic therapy. The main focus is given to the comparison of the mechanisms of the cytotoxic action of these complexes, their efficacy and prospects of their use in clinical practice. This is the first systematic review of cytotoxic zinc, iron, cobalt and copper compounds. The structure – activity relationships and the mechanisms of antitumour action are formulated for each type of metal complexes. The bibliography includes 181 references.
{"title":"Coordination compounds of biogenic metals as cytotoxic agents in cancer therapy","authors":"D. Guk, O. Krasnovskaya, E. Beloglazkina","doi":"10.1070/RCR5016","DOIUrl":"https://doi.org/10.1070/RCR5016","url":null,"abstract":"The review summarizes the data on the structures and methods for the synthesis of compounds with anticancer activity based on biogenic metals, which can replace platinum drugs prevailing in cytotoxic therapy. The main focus is given to the comparison of the mechanisms of the cytotoxic action of these complexes, their efficacy and prospects of their use in clinical practice. This is the first systematic review of cytotoxic zinc, iron, cobalt and copper compounds. The structure – activity relationships and the mechanisms of antitumour action are formulated for each type of metal complexes. The bibliography includes 181 references.","PeriodicalId":21523,"journal":{"name":"Russian Chemical Reviews","volume":"90 1","pages":"1566 - 1623"},"PeriodicalIF":7.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59010875","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
E. S. Alekseev, A. Alentiev, A. S. Belova, V. Bogdan, T. V. Bogdan, A. V. Bystrova, E. Gafarova, E. Golubeva, E. Grebenik, O. Gromov, V. Davankov, S. Zlotin, M. Kiselev, Aleksei E. Koklin, Yuriy N. Kononevich, A. Lazhko, V. V. Lunin, S. Lyubimov, O. Martyanov, I. I. Mishanin, A. Muzafarov, N. S. Nesterov, A. Nikolaev, R. Oparin, O. Parenago, O. Parenago, Yana A. Pokusaeva, I. Ronova, A. Solovieva, M. Temnikov, P. Timashev, O. V. Turova, E. Filatova, A. Philippov, A. M. Chibiryaev, A. Shalygin
Dedicated the memory of Akademician Valery Vasilievich Lunin, a friend, colleague, teacher, founder and leader of the research into application of supercritical fluids in chemistry. This review analyzes the rapidly developing applications of supercritical fluids, mainly supercritical carbon dioxide, in catalysis, chemistry of high-molecular-weight compounds, and medicinal chemistry in Russia and abroad. It considers the methods of catalyst preparation based on impregnation of inorganic and organic supports with metal-containing compounds, immobilization of organometallic and metal complex reagents in matrices of oxide and polymer supports, and deposition processes employing supercritical fluids. An analysis is presented of the prospects for applying CO2 and some organic compounds, such as aliphatic alcohols, in sub- and supercritical states as reactants and (or) solvents for catalytic reactions of hydrocarbon isomerization and cracking, hydrogenation, dehydrogenation, oxidation, etc., including the asymmetric reactions. The review discusses processes of synthesizing and modifying polymer materials for various purposes, including aerogels, foams, and composites impregnated with photochromes, in a supercritical fluid medium. Special attention is paid to supercritical one-pot processes, which make the techniques of obtaining new materials simpler, less expensive, and more efficient. The work investigates the effect of supercritical CO2 on the morphology, gas separation characteristics, and dielectric properties of polymers. One of the promising applications of supercritical fluids in medicine is the use in transplantology and pharmacology, for example, for the preparation of drug polymorphs with higher bioavailability. The review also provides an overview of the recent data on the use of EPR spectroscopy for studying the properties of supercritical fluids, including those exhibited in the vicinity of the critical point and identifying the intermediates of chemical reactions in such media. The bibliography includes 1151 references.
{"title":"Supercritical fluids in chemistry","authors":"E. S. Alekseev, A. Alentiev, A. S. Belova, V. Bogdan, T. V. Bogdan, A. V. Bystrova, E. Gafarova, E. Golubeva, E. Grebenik, O. Gromov, V. Davankov, S. Zlotin, M. Kiselev, Aleksei E. Koklin, Yuriy N. Kononevich, A. Lazhko, V. V. Lunin, S. Lyubimov, O. Martyanov, I. I. Mishanin, A. Muzafarov, N. S. Nesterov, A. Nikolaev, R. Oparin, O. Parenago, O. Parenago, Yana A. Pokusaeva, I. Ronova, A. Solovieva, M. Temnikov, P. Timashev, O. V. Turova, E. Filatova, A. Philippov, A. M. Chibiryaev, A. Shalygin","doi":"10.1070/rcr4932","DOIUrl":"https://doi.org/10.1070/rcr4932","url":null,"abstract":"Dedicated the memory of Akademician Valery Vasilievich Lunin, a friend, colleague, teacher, founder and leader of the research into application of supercritical fluids in chemistry. This review analyzes the rapidly developing applications of supercritical fluids, mainly supercritical carbon dioxide, in catalysis, chemistry of high-molecular-weight compounds, and medicinal chemistry in Russia and abroad. It considers the methods of catalyst preparation based on impregnation of inorganic and organic supports with metal-containing compounds, immobilization of organometallic and metal complex reagents in matrices of oxide and polymer supports, and deposition processes employing supercritical fluids. An analysis is presented of the prospects for applying CO2 and some organic compounds, such as aliphatic alcohols, in sub- and supercritical states as reactants and (or) solvents for catalytic reactions of hydrocarbon isomerization and cracking, hydrogenation, dehydrogenation, oxidation, etc., including the asymmetric reactions. The review discusses processes of synthesizing and modifying polymer materials for various purposes, including aerogels, foams, and composites impregnated with photochromes, in a supercritical fluid medium. Special attention is paid to supercritical one-pot processes, which make the techniques of obtaining new materials simpler, less expensive, and more efficient. The work investigates the effect of supercritical CO2 on the morphology, gas separation characteristics, and dielectric properties of polymers. One of the promising applications of supercritical fluids in medicine is the use in transplantology and pharmacology, for example, for the preparation of drug polymorphs with higher bioavailability. The review also provides an overview of the recent data on the use of EPR spectroscopy for studying the properties of supercritical fluids, including those exhibited in the vicinity of the critical point and identifying the intermediates of chemical reactions in such media. The bibliography includes 1151 references.","PeriodicalId":21523,"journal":{"name":"Russian Chemical Reviews","volume":"89 1","pages":"1337 - 1427"},"PeriodicalIF":7.7,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1070/rcr4932","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44997023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Lanthanides belong to the most important raw materials and are highly demanded in high-tech industry. Low-temperature electrochemical deposition of lanthanides and lanthanide-based alloys for recycling and obtaining functional materials can provide a real alternative to the currently used high-temperature electrolysis of molten salts. The review summarizes the advancements in the field of electrodeposition of lanthanides from organic ionic systems, such as ionic liquids and deep eutectic solvents. The growing interest in these ionic systems is due to their excellent physicochemical properties, in particular non-volatility, thermal and electrochemical stability. The review also discusses further prospects and potential of the electrochemical approach for obtaining lanthanide-containing advanced materials. The bibliography includes 219 references.
{"title":"Electrodeposition of lanthanides from ionic liquids and deep eutectic solvents","authors":"A. Rudnev","doi":"10.1070/RCR4970","DOIUrl":"https://doi.org/10.1070/RCR4970","url":null,"abstract":"Lanthanides belong to the most important raw materials and are highly demanded in high-tech industry. Low-temperature electrochemical deposition of lanthanides and lanthanide-based alloys for recycling and obtaining functional materials can provide a real alternative to the currently used high-temperature electrolysis of molten salts. The review summarizes the advancements in the field of electrodeposition of lanthanides from organic ionic systems, such as ionic liquids and deep eutectic solvents. The growing interest in these ionic systems is due to their excellent physicochemical properties, in particular non-volatility, thermal and electrochemical stability. The review also discusses further prospects and potential of the electrochemical approach for obtaining lanthanide-containing advanced materials. The bibliography includes 219 references.","PeriodicalId":21523,"journal":{"name":"Russian Chemical Reviews","volume":"89 1","pages":"1463 - 1482"},"PeriodicalIF":7.7,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47970254","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Representative examples of the application of 3D printing in organic synthesis, biochemistry, biotechnology, analytical chemistry, pharmaceutics and chemical education are considered. It is shown that additive technologies open up new prospects for the development of these fields of science. The characteristics of widely used 3D printing methods (fused deposition modelling and stereolithography) are discussed in the context of chemical applications. It is noted that the key feature of these methods is the wide accessibility of technologies and materials. The bibliography includes 498 references.
{"title":"Widely accessible 3D printing technologies in chemistry, biochemistry and pharmaceutics: applications, materials and prospects","authors":"E. Gordeev, V. Ananikov","doi":"10.1070/RCR4980","DOIUrl":"https://doi.org/10.1070/RCR4980","url":null,"abstract":"Representative examples of the application of 3D printing in organic synthesis, biochemistry, biotechnology, analytical chemistry, pharmaceutics and chemical education are considered. It is shown that additive technologies open up new prospects for the development of these fields of science. The characteristics of widely used 3D printing methods (fused deposition modelling and stereolithography) are discussed in the context of chemical applications. It is noted that the key feature of these methods is the wide accessibility of technologies and materials. The bibliography includes 498 references.","PeriodicalId":21523,"journal":{"name":"Russian Chemical Reviews","volume":"89 1","pages":"1507 - 1561"},"PeriodicalIF":7.7,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41412251","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
P. Shaposhnik, S. Zapunidi, M. Shestakov, E. Agina, S. Ponomarenko
This review summarizes and highlights the current state-of-the-art of research on chemical sensors and biosensors in liquid environment and neuromorphic devices based on electrolyte-gated organic transistors with the active semiconductor layer of organic π-conjugated materials (small molecules, oligomers and polymers). The architecture and principles of operation of electrolyte-gated organic transistors and the main advantages and drawbacks of these devices are considered in detail. The criteria for the selection of organic semiconductors for these devices are presented. The causes of degradation of semiconductor layers and ways of their elimination are discussed. Examples of the use of electrolyte-gated organic transistors as bio and chemical sensors, artificial synapses and computing devices are given. The bibliography includes 132 references.
{"title":"Modern bio and chemical sensors and neuromorphic devices based on organic semiconductors","authors":"P. Shaposhnik, S. Zapunidi, M. Shestakov, E. Agina, S. Ponomarenko","doi":"10.1070/RCR4973","DOIUrl":"https://doi.org/10.1070/RCR4973","url":null,"abstract":"This review summarizes and highlights the current state-of-the-art of research on chemical sensors and biosensors in liquid environment and neuromorphic devices based on electrolyte-gated organic transistors with the active semiconductor layer of organic π-conjugated materials (small molecules, oligomers and polymers). The architecture and principles of operation of electrolyte-gated organic transistors and the main advantages and drawbacks of these devices are considered in detail. The criteria for the selection of organic semiconductors for these devices are presented. The causes of degradation of semiconductor layers and ways of their elimination are discussed. Examples of the use of electrolyte-gated organic transistors as bio and chemical sensors, artificial synapses and computing devices are given. The bibliography includes 132 references.","PeriodicalId":21523,"journal":{"name":"Russian Chemical Reviews","volume":"89 1","pages":"1483 - 1506"},"PeriodicalIF":7.7,"publicationDate":"2020-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41761960","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The review summarizes and analyzes the currently know data on the synthesis, molecular and electronic structures and magnetic properties of bi-, tri- and tetraradical complexes containing a diamagnetic metal ion and redox-active ligands in the paramagnetic form. The bibliography includes 193 references.
{"title":"Complexes of diamagnetic cations with radical anion ligands","authors":"I. Ershova, A. Piskunov, V. Cherkasov","doi":"10.1070/RCR4957","DOIUrl":"https://doi.org/10.1070/RCR4957","url":null,"abstract":"The review summarizes and analyzes the currently know data on the synthesis, molecular and electronic structures and magnetic properties of bi-, tri- and tetraradical complexes containing a diamagnetic metal ion and redox-active ligands in the paramagnetic form. The bibliography includes 193 references.","PeriodicalId":21523,"journal":{"name":"Russian Chemical Reviews","volume":"89 1","pages":"1157 - 1183"},"PeriodicalIF":7.7,"publicationDate":"2020-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46910122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The evaluation of the significance of a chemical transformation addresses many factors, including such important characteristics as the number of chemical bonds formed in one step, the reaction time, labour intensity, the cost of reactants and catalysts and so on. The amount of waste produced in the reaction has also gained increasing importance in recent years. Multicomponent reactions (MCRs) occupy a special place as a synthetic tool in modern organic chemistry. These reactions allow the synthesis of target products with complex structures, minimizing labour costs. This review summarizes the literature on multicomponent reactions involving five or more components. The data in the review are classified according to the number of reactants participating in the reaction and the types of reactions. It is worth noting that in some cases, these transformations can be a part of a domino process, making this classification difficult, if not impossible. The structural diversity of the reaction products greatly increases with increasing number of components involved in the MCR, which becomes virtually unlimited when using combinations of MCRs. This review highlights the main trends of past decades in the field of MCRs. The last two decades have witnessed an explosive growth in the number of publications in this area of chemistry. The bibliography includes 309 references.
{"title":"Access to molecular complexity. Multicomponent reactions involving five or more components","authors":"V. Nenajdenko","doi":"10.1070/RCR5010","DOIUrl":"https://doi.org/10.1070/RCR5010","url":null,"abstract":"The evaluation of the significance of a chemical transformation addresses many factors, including such important characteristics as the number of chemical bonds formed in one step, the reaction time, labour intensity, the cost of reactants and catalysts and so on. The amount of waste produced in the reaction has also gained increasing importance in recent years. Multicomponent reactions (MCRs) occupy a special place as a synthetic tool in modern organic chemistry. These reactions allow the synthesis of target products with complex structures, minimizing labour costs. This review summarizes the literature on multicomponent reactions involving five or more components. The data in the review are classified according to the number of reactants participating in the reaction and the types of reactions. It is worth noting that in some cases, these transformations can be a part of a domino process, making this classification difficult, if not impossible. The structural diversity of the reaction products greatly increases with increasing number of components involved in the MCR, which becomes virtually unlimited when using combinations of MCRs. This review highlights the main trends of past decades in the field of MCRs. The last two decades have witnessed an explosive growth in the number of publications in this area of chemistry. The bibliography includes 309 references.","PeriodicalId":21523,"journal":{"name":"Russian Chemical Reviews","volume":"89 1","pages":"1274 - 1336"},"PeriodicalIF":7.7,"publicationDate":"2020-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49432297","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A new approach was developed to synthesize transition metal complexes with nitroxides based on the simultaneous involvement of nitronyl nitroxide and imino nitroxide in the reaction with metal. It was shown that the reaction of a metal with nitronyl nitroxide can afford a metal complex containing two different radicals in the metal coordination sphere in the case when imino nitroxide is generated in the reaction medium via a redox process. The reaction of a metal with imino nitroxide also can give mixed-ligand complexes, in which the metal coordinates both the starting imino nitroxide and its reduction product — the corresponding amidine oxide. This compound can be prepared by an alternative synthesis using the reaction of metal with sterically hindered amidine oxide, resulting in the formation of mixed-ligand coordination compounds through the coordination of both the starting amidine oxide and its oxidation product — imino nitroxide. In the latter case, the following conditions have to be met: the reaction should be performed in the presence of oxygen and transition metal, which can easily change its oxidation state under ambient conditions (CoII, MnII, FeII). To synthesize mixed-ligand complexes with transition metals that are not prone to change the oxidation state under ambient conditions (NiII, ZnII), a specially prepared mixture of nitronyl nitroxide and imino nitroxide should be added to the reaction mixture. It is worth noting that the reaction can be performed using nitronyl nitroxide and imino nitroxide belonging to different series, which significantly extends the scope of the method. The bibliography includes 156 references.
{"title":"New method for the synthesis of heterospin metal complexes with nitroxides","authors":"V. Ovcharenko, O. Kuznetsova","doi":"10.1070/RCR4981","DOIUrl":"https://doi.org/10.1070/RCR4981","url":null,"abstract":"A new approach was developed to synthesize transition metal complexes with nitroxides based on the simultaneous involvement of nitronyl nitroxide and imino nitroxide in the reaction with metal. It was shown that the reaction of a metal with nitronyl nitroxide can afford a metal complex containing two different radicals in the metal coordination sphere in the case when imino nitroxide is generated in the reaction medium via a redox process. The reaction of a metal with imino nitroxide also can give mixed-ligand complexes, in which the metal coordinates both the starting imino nitroxide and its reduction product — the corresponding amidine oxide. This compound can be prepared by an alternative synthesis using the reaction of metal with sterically hindered amidine oxide, resulting in the formation of mixed-ligand coordination compounds through the coordination of both the starting amidine oxide and its oxidation product — imino nitroxide. In the latter case, the following conditions have to be met: the reaction should be performed in the presence of oxygen and transition metal, which can easily change its oxidation state under ambient conditions (CoII, MnII, FeII). To synthesize mixed-ligand complexes with transition metals that are not prone to change the oxidation state under ambient conditions (NiII, ZnII), a specially prepared mixture of nitronyl nitroxide and imino nitroxide should be added to the reaction mixture. It is worth noting that the reaction can be performed using nitronyl nitroxide and imino nitroxide belonging to different series, which significantly extends the scope of the method. The bibliography includes 156 references.","PeriodicalId":21523,"journal":{"name":"Russian Chemical Reviews","volume":"89 1","pages":"1261 - 1273"},"PeriodicalIF":7.7,"publicationDate":"2020-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42837754","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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