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Partager le résultat de cette recherche Faire une suggestionContrôle de la stéréochimie du centre Ln dans des complexes base de Schiff 3d-4f : application à l'élaboration de molécules-aimants chirales / Bahjat El Rez
Titre : Contrôle de la stéréochimie du centre Ln dans des complexes base de Schiff 3d-4f : application à l'élaboration de molécules-aimants chirales Titre original : Control the stereochemistry of the Ln center in 3d-4f schiff base complexes : application to the development of chira molecule magnets Type de document : texte imprimé Auteurs : Bahjat El Rez, Auteur ; Jean-Pascal Sutter, Directeur de thèse ; Jean-Pierre Costes, Directeur de thèse Année de publication : 2015 Langues : Français (fre) Tags : CHIMIE DE COORDINATION MAGNÉTISME CHIRALITÉ TERRE-RARE SMM
COORDINATION CHEMISTRY MAGNETISM CHIRALITY RARE EARTH SMMRésumé : "Dans le cadre de cette thèse de doctorat nous nous sommes intéressés à la préparation de composés moléculaires magnétiques chiraux dont le centre métallique, siège de l'anisotropie magnétique, est également centre de chiralité. Notre étude a porté sur le contrôle de la stéréochimie du polyèdre de coordination d'un ion Ln, en particulier dans des complexes base de Schiff 3d-4f. L'approche originale que nous avons explorée consiste à induire la stéréochimie du centre Ln par un ligand-chélate anionique chiral directement lié au métal. L'anion-ligand que nous avons considéré est la forme déprotonée du trifluoroacétyl-3-camphre (abrégée Camph-). Pour des complexes de type base de Schiff 3d-4f, deux anions chiraux viennent s'ancrer sur l'ion Ln et, par transfert de chiralité, permettent de fixer la stéréochimie de la sphère de coordination de la terre-rare. Une stéréochimie Delta ou Lambda est ainsi obtenue en fonction de l'énantiomère de l'anion-chiral mis en œuvre dans la synthèse. Cette approche a permis la synthèse de plusieurs familles de composés énantiopurs (ex. [LMe2Ni(H2O)Ln(camph)2(CF3SO3)]; [LMe2Zn(Cl)Ln(camph)2(MeOH)]). Dans chaque cas une stéréochimie Lambda est associée à l'énantiomère R-(+) de l'anion chiral et une stéréochimie Delta à l'énantiomère S-(-). Cependant une telle stéréo-sélectivité n'est pas systématique, la dissymétrie de l'espace de la sphère de coordination de la terre-rare associée à son troisième anion ou à un ligand ancillaire semble jouer un rôle important.Selon la même approche, nous avons également considéré la préparation de complexes 4f mono-métalliques chiraux de formulation [Ln(Camph)4]-. L'étude des comportements magnétiques a mis en évidence des comportements de type SMM (Single Molecule Magnet) pour plusieurs composés contenant les ions Tb ou Dy."
"The research work described in this thesis deals with the design, the synthesis and magnetic property investigation of magnetic low dimensional molecular materials (i.e. single Molecule Magnets, SMM), especially in 3d-4f Schiff-base complexes, involving magnetically anisotropic lanthanide (Ln) metal centers in conjunction with chirality. The aim of this investigation was to provide an efficient access to enantiopure SMMs chiral at metal (Ln). We developed an original chemical approach that consists in introducing a chiral chelating diketonate ligand directly bonded to the Ln metal center. Thus transfer of chirality from chiral ligand to the coordination polyhedron of the metal center can be achieved. Deprotonated 3-trifluoroacetyl-camphor (Camph-) has been utilized as the chiral chelating ligand to synthesize several 3d-4f Schiff-base complexes, where two chiral anions are anchored on Ln ion rendering chiral coordination sphere around the rare-earth metal center. Depending on the enantiomer of the ligand employed in the synthesis, either Delta or LAmbda stereochemistry of the Ln polyhedron is obtained. This approach allowed synthesis of several families of enantiopurs SMMs chiral at Ln such as [LMe2Ni(H2O)Ln(camph)2(CF3SO3)] or [LMe2Zn(Cl)Ln(camph)2(MeOH)], where LMe2 = bicompartmental Schiff-base ligand. In each case, reaction with the R-(+) Camph ligand results in a Lambda stereochemistry, while a Delta stereochemistry is yielded upon reaction with the S-(-) Camph ligand. However, such a stereo-selectivity is not systematic. The third anion or an ancillary ligand associated with the rare-earth metal centers appears to play an important role in controlling the stereochemistry of the coordination sphere around the rare-earth metal centers. Using the same approach, we have also successfully isolated mono-metallic chiral 4f complexes of general formulae [Ln(Camph)4]-. The study of magnetic behaviors revealed Single Molecule Magnet (SMM) behavior for several complexes containing Tb or Dy ions."Document : Thèse de Doctorat Etablissement_delivrance : Université de Toulouse 3 Date_soutenance : 06/02/2015 Ecole_doctorale : Sciences de la Matière (SdM) Domaine : Chimie Macromoléculaire et Supramoléculaire Localisation : LCC En ligne : https://theses.fr/2015TOU30002 Contrôle de la stéréochimie du centre Ln dans des complexes base de Schiff 3d-4f : application à l'élaboration de molécules-aimants chirales = Control the stereochemistry of the Ln center in 3d-4f schiff base complexes : application to the development of chira molecule magnets [texte imprimé] / Bahjat El Rez, Auteur ; Jean-Pascal Sutter, Directeur de thèse ; Jean-Pierre Costes, Directeur de thèse . - 2015.
Langues : Français (fre)
Tags : CHIMIE DE COORDINATION MAGNÉTISME CHIRALITÉ TERRE-RARE SMM
COORDINATION CHEMISTRY MAGNETISM CHIRALITY RARE EARTH SMMRésumé : "Dans le cadre de cette thèse de doctorat nous nous sommes intéressés à la préparation de composés moléculaires magnétiques chiraux dont le centre métallique, siège de l'anisotropie magnétique, est également centre de chiralité. Notre étude a porté sur le contrôle de la stéréochimie du polyèdre de coordination d'un ion Ln, en particulier dans des complexes base de Schiff 3d-4f. L'approche originale que nous avons explorée consiste à induire la stéréochimie du centre Ln par un ligand-chélate anionique chiral directement lié au métal. L'anion-ligand que nous avons considéré est la forme déprotonée du trifluoroacétyl-3-camphre (abrégée Camph-). Pour des complexes de type base de Schiff 3d-4f, deux anions chiraux viennent s'ancrer sur l'ion Ln et, par transfert de chiralité, permettent de fixer la stéréochimie de la sphère de coordination de la terre-rare. Une stéréochimie Delta ou Lambda est ainsi obtenue en fonction de l'énantiomère de l'anion-chiral mis en œuvre dans la synthèse. Cette approche a permis la synthèse de plusieurs familles de composés énantiopurs (ex. [LMe2Ni(H2O)Ln(camph)2(CF3SO3)]; [LMe2Zn(Cl)Ln(camph)2(MeOH)]). Dans chaque cas une stéréochimie Lambda est associée à l'énantiomère R-(+) de l'anion chiral et une stéréochimie Delta à l'énantiomère S-(-). Cependant une telle stéréo-sélectivité n'est pas systématique, la dissymétrie de l'espace de la sphère de coordination de la terre-rare associée à son troisième anion ou à un ligand ancillaire semble jouer un rôle important.Selon la même approche, nous avons également considéré la préparation de complexes 4f mono-métalliques chiraux de formulation [Ln(Camph)4]-. L'étude des comportements magnétiques a mis en évidence des comportements de type SMM (Single Molecule Magnet) pour plusieurs composés contenant les ions Tb ou Dy."
"The research work described in this thesis deals with the design, the synthesis and magnetic property investigation of magnetic low dimensional molecular materials (i.e. single Molecule Magnets, SMM), especially in 3d-4f Schiff-base complexes, involving magnetically anisotropic lanthanide (Ln) metal centers in conjunction with chirality. The aim of this investigation was to provide an efficient access to enantiopure SMMs chiral at metal (Ln). We developed an original chemical approach that consists in introducing a chiral chelating diketonate ligand directly bonded to the Ln metal center. Thus transfer of chirality from chiral ligand to the coordination polyhedron of the metal center can be achieved. Deprotonated 3-trifluoroacetyl-camphor (Camph-) has been utilized as the chiral chelating ligand to synthesize several 3d-4f Schiff-base complexes, where two chiral anions are anchored on Ln ion rendering chiral coordination sphere around the rare-earth metal center. Depending on the enantiomer of the ligand employed in the synthesis, either Delta or LAmbda stereochemistry of the Ln polyhedron is obtained. This approach allowed synthesis of several families of enantiopurs SMMs chiral at Ln such as [LMe2Ni(H2O)Ln(camph)2(CF3SO3)] or [LMe2Zn(Cl)Ln(camph)2(MeOH)], where LMe2 = bicompartmental Schiff-base ligand. In each case, reaction with the R-(+) Camph ligand results in a Lambda stereochemistry, while a Delta stereochemistry is yielded upon reaction with the S-(-) Camph ligand. However, such a stereo-selectivity is not systematic. The third anion or an ancillary ligand associated with the rare-earth metal centers appears to play an important role in controlling the stereochemistry of the coordination sphere around the rare-earth metal centers. Using the same approach, we have also successfully isolated mono-metallic chiral 4f complexes of general formulae [Ln(Camph)4]-. The study of magnetic behaviors revealed Single Molecule Magnet (SMM) behavior for several complexes containing Tb or Dy ions."Document : Thèse de Doctorat Etablissement_delivrance : Université de Toulouse 3 Date_soutenance : 06/02/2015 Ecole_doctorale : Sciences de la Matière (SdM) Domaine : Chimie Macromoléculaire et Supramoléculaire Localisation : LCC En ligne : https://theses.fr/2015TOU30002
Titre : Electronic properties of organic conductors Type de document : texte imprimé Auteurs : Mori, Takehiko, Auteur Editeur : Dordrecht : Springer Année de publication : 2016 Importance : x, 356 p. ISBN/ISSN/EAN : 978-4-431-55263-5 Note générale : Provides an accessible introduction to solid state physics for chemists without assuming any background in physics
Introduces energy bands as an extension of molecular orbitals
Presents easy-to-follow equations, with units that are not difficult to convertLangues : Anglais (eng) Catégories : Matériaux Tags : QUANTUM CHEMISTRY MAGNETISM ELECTRONICS-MATERIALS Index. décimale : B-G Résumé : This book provides an easily understandable introduction to solid state physics for chemists and engineers. Band theory is introduced as an extension of molecular orbital theory, and its application to organic materials is described. Phenomena beyond band theory are treated in relation to magnetism and electron correlation, which are explained in terms of the valence bond theory and the Coulomb and exchange integrals. After the fundamental concepts of magnetism are outlined, the relation of correlation and superconductivity is described without assuming a knowledge of advanced physics. Molecular design of organic conductors and semiconductors is discussed from the standpoint of oxidation-reduction potentials, and after a brief survey of organic superconductors, various applications of organic semiconductor devices are described. This book will be useful not only for researchers but also for graduate students as a valuable reference. Note de contenu : " * Quantum Chemistry of Molecules
* Quantum Chemistry of Solids
* Transport Properties
* Magnetism
* Electron CorrelationCote : B-G054 Num_Inv : 3509 Localisation : LCC (SdS) Electronic properties of organic conductors [texte imprimé] / Mori, Takehiko, Auteur . - Dordrecht : Springer, 2016 . - x, 356 p.
ISBN : 978-4-431-55263-5
Provides an accessible introduction to solid state physics for chemists without assuming any background in physics
Introduces energy bands as an extension of molecular orbitals
Presents easy-to-follow equations, with units that are not difficult to convert
Langues : Anglais (eng)
Catégories : Matériaux Tags : QUANTUM CHEMISTRY MAGNETISM ELECTRONICS-MATERIALS Index. décimale : B-G Résumé : This book provides an easily understandable introduction to solid state physics for chemists and engineers. Band theory is introduced as an extension of molecular orbital theory, and its application to organic materials is described. Phenomena beyond band theory are treated in relation to magnetism and electron correlation, which are explained in terms of the valence bond theory and the Coulomb and exchange integrals. After the fundamental concepts of magnetism are outlined, the relation of correlation and superconductivity is described without assuming a knowledge of advanced physics. Molecular design of organic conductors and semiconductors is discussed from the standpoint of oxidation-reduction potentials, and after a brief survey of organic superconductors, various applications of organic semiconductor devices are described. This book will be useful not only for researchers but also for graduate students as a valuable reference. Note de contenu : " * Quantum Chemistry of Molecules
* Quantum Chemistry of Solids
* Transport Properties
* Magnetism
* Electron CorrelationCote : B-G054 Num_Inv : 3509 Localisation : LCC (SdS) Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 3509 B-G054 Texte imprimé Bibliothèque Livre Disponible
Titre : Electronic structure and magnetism of inorganic compounds -Specialist periodical reports - vol 2 : A review of the literature published during 1972 and early 1973 Type de document : texte imprimé Auteurs : P. Day, Éditeur scientifique Editeur : London : Royal society Année de publication : 1972 Collection : Electronic structure and magnetism of inorganic compounds, ISSN 0305-9804 Importance : ix, 372 p. Langues : Anglais (eng) Catégories : Méthodes d'Analyses Tags : INORGANIC COMPOUNDS ELECTRONIC STRUCTURE MAGNETISM Résumé : "Specialist Periodical Reports provide systematic and detailed review coverage of progress in the major areas of chemical research. Written by experts in their specialist fields the series creates a unique service for the active research chemist, supplying regular critical in-depth accounts of progress in particular areas of chemistry. For over 80 years the Royal Society of Chemistry and its predecessor, the Chemical Society, have been publishing reports charting developments in chemistry, which originally took the form of Annual Reports. However, by 1967 the whole spectrum of chemistry could no longer be contained within one volume and the series Specialist Periodical Reports was born. The Annual Reports themselves still existed but were divided into two, and subsequently three, volumes covering Inorganic, Organic and Physical Chemistry. For more general coverage of the highlights in chemistry they remain a 'must'. Since that time the SPR series has altered according to the fluctuating degree of activity in various fields of chemistry. Some titles have remained unchanged, while others have altered their emphasis along with their titles; some have been combined under a new name whereas others have had to be discontinued. The current list of Specialist Periodical Reports can be seen on the inside flap of this volume." Cote : B-S196 Num_Inv : 892 Localisation : LCC (SdS) Electronic structure and magnetism of inorganic compounds -Specialist periodical reports - vol 2 : A review of the literature published during 1972 and early 1973 [texte imprimé] / P. Day, Éditeur scientifique . - London : Royal society, 1972 . - ix, 372 p.. - (Electronic structure and magnetism of inorganic compounds, ISSN 0305-9804) .
Langues : Anglais (eng)
Catégories : Méthodes d'Analyses Tags : INORGANIC COMPOUNDS ELECTRONIC STRUCTURE MAGNETISM Résumé : "Specialist Periodical Reports provide systematic and detailed review coverage of progress in the major areas of chemical research. Written by experts in their specialist fields the series creates a unique service for the active research chemist, supplying regular critical in-depth accounts of progress in particular areas of chemistry. For over 80 years the Royal Society of Chemistry and its predecessor, the Chemical Society, have been publishing reports charting developments in chemistry, which originally took the form of Annual Reports. However, by 1967 the whole spectrum of chemistry could no longer be contained within one volume and the series Specialist Periodical Reports was born. The Annual Reports themselves still existed but were divided into two, and subsequently three, volumes covering Inorganic, Organic and Physical Chemistry. For more general coverage of the highlights in chemistry they remain a 'must'. Since that time the SPR series has altered according to the fluctuating degree of activity in various fields of chemistry. Some titles have remained unchanged, while others have altered their emphasis along with their titles; some have been combined under a new name whereas others have had to be discontinued. The current list of Specialist Periodical Reports can be seen on the inside flap of this volume." Cote : B-S196 Num_Inv : 892 Localisation : LCC (SdS) Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 892 B-S196 Texte imprimé Bibliothèque Livre Disponible
Titre : Electrostatics of atoms and molecules Type de document : texte imprimé Auteurs : Shridhar R. Gadre ; Rajendra N. Shirsat Editeur : Hyderabad : Universities Press (India) Année de publication : 2000 Importance : 134 p. ISBN/ISSN/EAN : 978-81-7371-296-8 Langues : Anglais (eng) Tags : MAGNETISM ELECTROMAGNETISM Index. décimale : EQ -Equipe- Résumé : "This book introduces the subject of molecular electrostatics to postgraduate students, teachers and young researchers in chemistry, physics and biology. It discusses rigorous as well as applied aspects of the molecular electrostatic potential (MESP) and provides an essence of relevant mathematical arguments, without going into detailed derivations. A number of color illustrations highlight the salient features of MESP." Cote : LCC/D Num_Inv : 2588 Electrostatics of atoms and molecules [texte imprimé] / Shridhar R. Gadre ; Rajendra N. Shirsat . - Hyderabad : Universities Press (India), 2000 . - 134 p.
ISBN : 978-81-7371-296-8
Langues : Anglais (eng)
Tags : MAGNETISM ELECTROMAGNETISM Index. décimale : EQ -Equipe- Résumé : "This book introduces the subject of molecular electrostatics to postgraduate students, teachers and young researchers in chemistry, physics and biology. It discusses rigorous as well as applied aspects of the molecular electrostatic potential (MESP) and provides an essence of relevant mathematical arguments, without going into detailed derivations. A number of color illustrations highlight the salient features of MESP." Cote : LCC/D Num_Inv : 2588 Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 2588 LCC/D Texte imprimé Equipe Livre Equipe - Demande préalable
Disponible
Titre : Introduction to magnetic materials Type de document : texte imprimé Auteurs : Bernard Dennis Cullity ; Chad D. Graham Mention d'édition : Second edition Editeur : Hoboken : Wiley Année de publication : 2009 Importance : xvii, 544 p. Présentation : ill. Format : 26 cm ISBN/ISSN/EAN : 978-0-471-47741-9 Langues : Anglais (eng) Catégories : Matériaux Tags : MAGNETIC MATERIALS MAGNETISM Index. décimale : B-G Résumé : "Introduction to Magnetic Materials, 2nd Edition covers the basics of magnetic quantities, magnetic devices, and materials used in practice. While retaining much of the original, this revision now covers SQUID and alternating gradient magnetometers, magnetic force microscope, Kerr effect, amorphous alloys, rare-earth magnets, SI Units alongside cgs units, and other up-to-date topics. In addition, the authors have added an entirely new chapter on information materials. The text presents materials at the practical rather than theoretical level, allowing for a physical, quantitative, measurement-based understanding of magnetism among readers, be they professional engineers or graduate-level students." Cote : B-G031 (SdS) Num_Inv : 3087 Introduction to magnetic materials [texte imprimé] / Bernard Dennis Cullity ; Chad D. Graham . - Second edition . - Hoboken : Wiley, 2009 . - xvii, 544 p. : ill. ; 26 cm.
ISBN : 978-0-471-47741-9
Langues : Anglais (eng)
Catégories : Matériaux Tags : MAGNETIC MATERIALS MAGNETISM Index. décimale : B-G Résumé : "Introduction to Magnetic Materials, 2nd Edition covers the basics of magnetic quantities, magnetic devices, and materials used in practice. While retaining much of the original, this revision now covers SQUID and alternating gradient magnetometers, magnetic force microscope, Kerr effect, amorphous alloys, rare-earth magnets, SI Units alongside cgs units, and other up-to-date topics. In addition, the authors have added an entirely new chapter on information materials. The text presents materials at the practical rather than theoretical level, allowing for a physical, quantitative, measurement-based understanding of magnetism among readers, be they professional engineers or graduate-level students." Cote : B-G031 (SdS) Num_Inv : 3087 Exemplaires(1)
Code-barres Cote Support Localisation Section Disponibilité 3087 B-G031 Texte imprimé Bibliothèque Livre Disponible
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