The Experts below are selected from a list of 174 Experts worldwide ranked by ideXlab platform
Rudi Van Eldik - One of the best experts on this subject based on the ideXlab platform.
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Inorganic Reaction mechanisms. A personal journey.
Dalton Transactions, 2020Co-Authors: Colin D. Hubbard, Debabrata Chatterjee, Maria Oszajca, Justyna Polaczek, Olga Impert, Marta Chrzanowska, Anna Katafias, Ralph Puchta, Rudi Van EldikAbstract:This review covers highlights of the work performed in the van Eldik group on Inorganic Reaction mechanisms over the past two decades in the form of a personal journey. Topics that are covered include, from NO to HNO chemistry, peroxide activation in model porphyrin and enzymatic systems, the wonder-world of RuIII(edta) chemistry, redox chemistry of Ru(III) complexes, Ru(II) polypyridyl complexes and their application, relevant physicochemical properties and Reaction mechanisms in ionic liquids, and mechanistic insight from computational chemistry. In each of these sections, typical examples of mechanistic studies are presented in reference to related work reported in the literature.
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HIGH PRESSURE STUDIES OF Inorganic Reaction MECHANISMS
ChemInform, 2016Co-Authors: Rudi Van EldikAbstract:The effect of pressure on a wide range of Inorganic and organometallic Reactions is discussed to illustrate the general applicability of high pressure kinetics in the elucidation of Reaction mechanisms. The selected Reaction types include substitution and isomerization Reactions of square-planar and octahedral complexes, as well as electron transfer and addition/elimination Reactions of octahedral systems. A critical evaluation is given, general trends are discussed, and recent advances are emphasized.
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elucidation of Inorganic Reaction mechanisms in ionic liquids the important role of solvent donor and acceptor properties
Dalton Transactions, 2014Co-Authors: Matthias Schmeisser, Rudi Van EldikAbstract:In this article, we focus on the important role of solvent donor and acceptor properties of ionic liquids in the elucidation of Inorganic Reaction mechanisms. For this purpose, mechanistic and structural studies on typical Inorganic Reactions, performed in ionic liquids, have been conducted. The presented systems range from simple complex-formation and ligand-substitution Reactions to the activation of small molecules by catalytically active complexes. The data obtained for the Reactions in ionic liquids are compared with those for the same Reactions carried out in conventional solvents, and are discussed with respect to the donor and acceptor properties of the applied ionic liquids. The intention of this perspective is to gain more insight into the role of ILs as solvents and their interaction with metal ions and complexes in solution.
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Application of low-temperature rapid-scan techniques in the elucidation of Inorganic Reaction mechanisms
Coordination Chemistry Reviews, 2010Co-Authors: Rudi Van Eldik, Colin D. HubbardAbstract:Abstract Reactions that occur too rapidly to be monitored by rapid Reaction methods at temperatures at or close to ambient can be investigated kinetically by retarding their Reaction rates employing very low temperatures. A selection of Reactions studied by this approach (low-temperature stopped-flow spectrophotometry) is reported. Details of the Reaction mechanisms have been revealed for peroxide activation involving iron(III) porphyrins and cytochrome P450, superoxide activation involving manganese(II) complexes and iron porphyrin complexes, and dioxygen activation and binding by model mono-, and dinuclear copper(I) complexes and dioxygen activation at mono-, and dinuclear non-heme iron complexes. A final section covers progress in unravelling the mechanism of carbon–hydrogen bond activation by platinum complexes.
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Elucidation of Inorganic Reaction mechanisms through volume profile analysis
Coordination Chemistry Reviews, 1999Co-Authors: Grażyna Stochel, Rudi Van EldikAbstract:Abstract The application of high pressure kinetic and thermodynamic techniques in mechanistic studies of chemical Reactions in solution, can contribute towards the elucidation of the underlying Reaction mechanisms. In this review the fundamental principles involved in the construction of Reaction volume profiles and the mechanistic interpretation of the latter are presented for various types of Reactions in Inorganic, organometallic and bioInorganic systems. These include thermal and photo-induced ligand substitution and electron-transfer Reactions, as well as processes that involve the activation of small molecules. The mechanistic insight gained through volume profile analysis for non-symmetrical Reactions forms the theme of this contribution.
Rudi Van Eldik - One of the best experts on this subject based on the ideXlab platform.
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Elucidation of Inorganic Reaction mechanisms in ionic liquids: the important role of solvent donor and acceptor properties
Dalton Trans., 2014Co-Authors: Matthias Schmeisser, Rudi Van EldikAbstract:A review; in this article, we focus on the important role of solvent donor and acceptor properties of ionic liqs. in the elucidation of inorg. Reaction mechanisms. For this purpose, mechanistic and structural studies on typical inorg. Reactions, performed in ionic liqs., have been conducted. The presented systems range from simple complex-formation and ligand-substitution Reactions to the activation of small mols. by catalytically active complexes. The data obtained for the Reactions in ionic liqs. are compared with those for the same Reactions carried out in conventional solvents, and are discussed with respect to the donor and acceptor properties of the applied ionic liqs. The intention of this perspective is to gain more insight into the role of ILs as solvents and their interaction with metal ions and complexes in soln. [on SciFinder(R)]
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Application of low-temperature rapid-scan techniques in the elucidation of Inorganic Reaction mechanisms
Coordination Chemistry Reviews, 2010Co-Authors: Rudi Van Eldik, Colin D. HubbardAbstract:Reactions that occur too rapidly to be monitored by rapid Reaction methods at temperatures at or close to ambient can be investigated kinetically by retarding their Reaction rates employing very low temperatures. A selection of Reactions studied by this approach (low-temperature stopped-flow spectrophotometry) is reported. Details of the Reaction mechanisms have been revealed for peroxide activation involving iron(III) porphyrins and cytochrome P450, superoxide activation involving manganese(II) complexes and iron porphyrin complexes, and dioxygen activation and binding by model mono-, and dinuclear copper(I) complexes and dioxygen activation at mono-, and dinuclear non-heme iron complexes. A final section covers progress in unravelling the mechanism of carbon-hydrogen bond activation by platinum complexes. © 2009 Elsevier B.V. All rights reserved.
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Elucidation of Inorganic Reaction mechanisms. Application of high pressure
South African Journal of Chemistry, 2000Co-Authors: Rudi Van Eldik, Colin D. HubbardAbstract:The application of high pressure techniques in mechanistic studies of Inorganic Reactions in solution, can contribute towards the elucidation of the underlying Reaction mechanisms. The fundamental principles involved, the general instrumentation employed, the construction of volume profiles and their mechanistic interpretation, are discussed. Typical examples covering various types of Reactions in Inorganic, organometallic and bioInorganic systems, that occur on a range of different time scales, are presented. The advantage of pressure as a physical variable and mechanistic indicator is considered and an evaluation of the mechanistic insight gained is given.
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Elucidation of Inorganic Reaction mechanisms through volume profile analysis
Coordination Chemistry Reviews, 1999Co-Authors: Grażyna Stochel, Rudi Van EldikAbstract:The application of high pressure kinetic and thermodynamic techniques in mechanistic studies of chemical Reactions in solution, can contribute towards the elucidation of the underlying Reaction mechanisms. In this review the fundamental principles involved in the construction of Reaction volume profiles and the mechanistic interpretation of the latter are presented for various types of Reactions in Inorganic, organometallic and bioInorganic systems. These include thermal and photo-induced ligand substitution and electron-transfer Reactions, as well as processes that involve the activation of small molecules. The mechanistic insight gained through volume profile analysis for non-symmetrical Reactions forms the theme of this contribution. © 1999 Elsevier Science S.A. All rights reserved.
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Inorganic and BioInorganic Reaction Mechanisms: Application of High-Pressure Techniques
Advances in Inorganic Chemistry, 1999Co-Authors: Rudi Van Eldik, Carlos Dücker-Benfer, Florian ThalerAbstract:This chapter discusses Inorganic and bio-Inorganic Reaction mechanisms and applications of high-pressure techniques. Almost all chemical Reactions in solution exhibit characteristic pressure dependence over a moderate pressure range of a few hundred megapascals. The general understanding of ligand-substitution mechanisms of square planar and octahedral complexes since the earlier concepts were developed and benefited greatly from the numerous high-pressure kinetic studies performed during the past two decades. Solvent exchange processes are the most fundamental substitution Reactions that characterize the liability and Reaction mechanism of a metal center within coordination geometry. Solvent exchange mechanisms are not only of fundamental interest in coordination chemistry, their understanding is of direct interest to the application of certain metal complexes as contrast agents for magnetic resonance imaging. Application of pulse-radiolysis techniques revealed that the intramolecular and intermolecular electron-transfer Reactions all exhibit a significant acceleration with increasing pressure.
Colin D. Hubbard - One of the best experts on this subject based on the ideXlab platform.
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Inorganic Reaction mechanisms. A personal journey.
Dalton Transactions, 2020Co-Authors: Colin D. Hubbard, Debabrata Chatterjee, Maria Oszajca, Justyna Polaczek, Olga Impert, Marta Chrzanowska, Anna Katafias, Ralph Puchta, Rudi Van EldikAbstract:This review covers highlights of the work performed in the van Eldik group on Inorganic Reaction mechanisms over the past two decades in the form of a personal journey. Topics that are covered include, from NO to HNO chemistry, peroxide activation in model porphyrin and enzymatic systems, the wonder-world of RuIII(edta) chemistry, redox chemistry of Ru(III) complexes, Ru(II) polypyridyl complexes and their application, relevant physicochemical properties and Reaction mechanisms in ionic liquids, and mechanistic insight from computational chemistry. In each of these sections, typical examples of mechanistic studies are presented in reference to related work reported in the literature.
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Application of low-temperature rapid-scan techniques in the elucidation of Inorganic Reaction mechanisms
Coordination Chemistry Reviews, 2010Co-Authors: Rudi Van Eldik, Colin D. HubbardAbstract:Abstract Reactions that occur too rapidly to be monitored by rapid Reaction methods at temperatures at or close to ambient can be investigated kinetically by retarding their Reaction rates employing very low temperatures. A selection of Reactions studied by this approach (low-temperature stopped-flow spectrophotometry) is reported. Details of the Reaction mechanisms have been revealed for peroxide activation involving iron(III) porphyrins and cytochrome P450, superoxide activation involving manganese(II) complexes and iron porphyrin complexes, and dioxygen activation and binding by model mono-, and dinuclear copper(I) complexes and dioxygen activation at mono-, and dinuclear non-heme iron complexes. A final section covers progress in unravelling the mechanism of carbon–hydrogen bond activation by platinum complexes.
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Application of low-temperature rapid-scan techniques in the elucidation of Inorganic Reaction mechanisms
Coordination Chemistry Reviews, 2010Co-Authors: Rudi Van Eldik, Colin D. HubbardAbstract:Reactions that occur too rapidly to be monitored by rapid Reaction methods at temperatures at or close to ambient can be investigated kinetically by retarding their Reaction rates employing very low temperatures. A selection of Reactions studied by this approach (low-temperature stopped-flow spectrophotometry) is reported. Details of the Reaction mechanisms have been revealed for peroxide activation involving iron(III) porphyrins and cytochrome P450, superoxide activation involving manganese(II) complexes and iron porphyrin complexes, and dioxygen activation and binding by model mono-, and dinuclear copper(I) complexes and dioxygen activation at mono-, and dinuclear non-heme iron complexes. A final section covers progress in unravelling the mechanism of carbon-hydrogen bond activation by platinum complexes. © 2009 Elsevier B.V. All rights reserved.
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Elucidation of Inorganic Reaction mechanisms. Application of high pressure
South African Journal of Chemistry, 2000Co-Authors: Rudi Van Eldik, Colin D. HubbardAbstract:The application of high pressure techniques in mechanistic studies of Inorganic Reactions in solution, can contribute towards the elucidation of the underlying Reaction mechanisms. The fundamental principles involved, the general instrumentation employed, the construction of volume profiles and their mechanistic interpretation, are discussed. Typical examples covering various types of Reactions in Inorganic, organometallic and bioInorganic systems, that occur on a range of different time scales, are presented. The advantage of pressure as a physical variable and mechanistic indicator is considered and an evaluation of the mechanistic insight gained is given.
Grażyna Stochel - One of the best experts on this subject based on the ideXlab platform.
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Elucidation of Inorganic Reaction mechanisms through volume profile analysis
Coordination Chemistry Reviews, 1999Co-Authors: Grażyna Stochel, Rudi Van EldikAbstract:Abstract The application of high pressure kinetic and thermodynamic techniques in mechanistic studies of chemical Reactions in solution, can contribute towards the elucidation of the underlying Reaction mechanisms. In this review the fundamental principles involved in the construction of Reaction volume profiles and the mechanistic interpretation of the latter are presented for various types of Reactions in Inorganic, organometallic and bioInorganic systems. These include thermal and photo-induced ligand substitution and electron-transfer Reactions, as well as processes that involve the activation of small molecules. The mechanistic insight gained through volume profile analysis for non-symmetrical Reactions forms the theme of this contribution.
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Elucidation of Inorganic Reaction mechanisms through volume profile analysis
Coordination Chemistry Reviews, 1999Co-Authors: Grażyna Stochel, Rudi Van EldikAbstract:The application of high pressure kinetic and thermodynamic techniques in mechanistic studies of chemical Reactions in solution, can contribute towards the elucidation of the underlying Reaction mechanisms. In this review the fundamental principles involved in the construction of Reaction volume profiles and the mechanistic interpretation of the latter are presented for various types of Reactions in Inorganic, organometallic and bioInorganic systems. These include thermal and photo-induced ligand substitution and electron-transfer Reactions, as well as processes that involve the activation of small molecules. The mechanistic insight gained through volume profile analysis for non-symmetrical Reactions forms the theme of this contribution. © 1999 Elsevier Science S.A. All rights reserved.
Cheng-wei Lu - One of the best experts on this subject based on the ideXlab platform.
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Facile Synthesis of Si3N4 Nanocrystals Via an Organic–Inorganic Reaction Route
Journal of the American Ceramic Society, 2009Co-Authors: Jian Qiang Bi, Lin Lin Pang, Shao Jie Li, Cheng-guo Wang, Yong Xin Qi, Cheng-wei LuAbstract:Silicon nitride (Si3N4) nanocrystals were synthesized at about 250°C by a simple organic–Inorganic Reaction between CH3SiCl3 and NaN3. The yield of Si3N4 is no
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Facile synthesis of Si3N4 nanocrystals via an organic-Inorganic Reaction route
Journal of the American Ceramic Society, 2009Co-Authors: Hui Ling Zhu, Fu Dong Han, Jian Qiang Bi, Yu Jun Bai, Lin Lin Pang, Shao Jie Li, Cheng-guo Wang, Yong Xin Qi, Cheng-wei LuAbstract:Silicon nitride (Si3N4) nanocrystals were synthesized at about 250 degrees C by a simple organic-Inorganic Reaction between CH3SiCl3 and NaN3. The yield of Si3N4 is no < 70 wt% based on the amount of precursor CH3SiCl3 used in the Reaction and TGA analysis. X-ray diffraction indicates the formation of a mixture of alpha- and beta-Si3N4. Particles with size from 40 to 100 nm are dominant in the products examined by transmission electron microscopy. X-ray photoelectron spectroscopy gives an atomic ratio of Si:N around 0.75:1. The formation of nanocrystalline Si3N4 during the organic-Inorganic Reaction goes through an intermediate product of NaSi2N3, which is important for understanding the Reaction mechanism.