Photomagnetic properties of spin crossover complexes with multi-metastable states / Nawel Ould Moussa  

Public ISBD Titre : Photomagnetic properties of spin crossover complexes with multi-metastable states Type de document : texte imprimé Auteurs : Nawel Ould Moussa, Auteur ; Azzedine Bousseksou, Directeur de thèse Langues : Anglais (eng) Tags : SPIN TRANSITION  LIEST EFFECT  BINUCLEAR COMPLEX  RAMAN SPECTROMETRY  MAGNETIC MEASUREMENTS  SYMMETRY BREAKING Résumé : "The aim of the present work was to develop a detailed picture of the photo-excitation process in some special spin crossover complexes, which exhibit more than one long-lived metastable states. We are interested in the effects of visible and infrared light irradiation on these systems. Such "multi-metastable spin crossover complexes" display actually an interesting and largely unexplored photophysics and hold also some promises as future candidates for storing and transferring information in molecular devices. In order to explore this topic, we have chosen five different systems: the mononuclear [Fe(ptz)6](BF4)2 complex (ptz = 1-propyleterazole) for which we demonstrate a clear decoupling between the crystallographic phase transition and the light-induced spin conversion and four binuclear complexes of the family {[Fe(L)(NCX)2]2bpym} ?(X = S or Se; L = bpym (2,2'-bipyrimidine) or bt (2,2'-bithiazoline)). This last study led to a number of original results, revealing for example wavelength-selective photomagnetic phenomena in these systems." Document : Thèse de Doctorat Etablissement_delivrance : Université Toulouse 3 Date_soutenance : 19/02/2007 Domaine : Physique de la matière En ligne : https://theses.fr/2007TOU30036 Photomagnetic properties of spin crossover complexes with multi-metastable states [texte imprimé] / Nawel Ould Moussa, Auteur ; Azzedine Bousseksou, Directeur de thèse . - [s.d.]. Langues : Anglais (eng) Tags : SPIN TRANSITION  LIEST EFFECT  BINUCLEAR COMPLEX  RAMAN SPECTROMETRY  MAGNETIC MEASUREMENTS  SYMMETRY BREAKING Résumé : "The aim of the present work was to develop a detailed picture of the photo-excitation process in some special spin crossover complexes, which exhibit more than one long-lived metastable states. We are interested in the effects of visible and infrared light irradiation on these systems. Such "multi-metastable spin crossover complexes" display actually an interesting and largely unexplored photophysics and hold also some promises as future candidates for storing and transferring information in molecular devices. In order to explore this topic, we have chosen five different systems: the mononuclear [Fe(ptz)6](BF4)2 complex (ptz = 1-propyleterazole) for which we demonstrate a clear decoupling between the crystallographic phase transition and the light-induced spin conversion and four binuclear complexes of the family {[Fe(L)(NCX)2]2bpym} ?(X = S or Se; L = bpym (2,2'-bipyrimidine) or bt (2,2'-bithiazoline)). This last study led to a number of original results, revealing for example wavelength-selective photomagnetic phenomena in these systems." Document : Thèse de Doctorat Etablissement_delivrance : Université Toulouse 3 Date_soutenance : 19/02/2007 Domaine : Physique de la matière En ligne : https://theses.fr/2007TOU30036

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