Search results for "Ordination"

Fluorescent organometallic complexes : when the photovoltaic leads to theranostics

2013

The goal of my PhD thesis was to synthesize new molecules, which give access to fluorescentorganometallic complexes with interesting properties for photovoltaic and theranostic. In thisproject, several main points have been studied.The first part of this manuscript concerns the synthesis of new metallocene and metalloporphyrinsbasedorganometallic complexes to the design of solar cells. After a short introduction, wepresented the synthesis of titanium complexes and metalloporphyrins in the first chapter. Inparticular, we described the synthesis of model compounds and the difficulties encountered duringthe transition to porphyrin derivatives. However, in view of results obtained and opportuni…

“Two-Story” Calix[6]arene-Based Zinc and Copper Complexes: Structure, Properties, and O 2 Binding

2017

International audience; A new “two-story” calix[6]arene-based ligand was synthesized, and its coordination chemistry was explored. It presents a tren cap connected to the calixarene small rim through three amido spacers. X-ray diffraction studies of its metal complexes revealed a six-coordinate ZnII complex with all of the carbonyl groups of the amido arms bound and a five-coordinate CuII complex with only one amido arm bound. These dicationic complexes were poorly responsive toward exogenous neutral donors, but the amido arms were readily displaced by small anions or deprotonated with a base to give the corresponding monocationic complexes. Cyclic voltammetry in various solvents showed a r…

Inside Back Cover: First Step Towards a Devil's Staircase in Spin-Crossover Materials (Angew. Chem. Int. Ed. 30/2016)

2016

International audience; Periodic and aperiodic spin-state concentration waves form during “Devil's staircase”-type spin-crossover in a new bimetallic 2D coordination polymer {Fe[(Hg(SCN)3)2](4,4′-bipy)2}n. In their Communication on page 8675 ff., J. A. Real, E. Collet et al. describe the appearance of spin-state concentration waves between long-range spatially ordered structures of low- and high-spin states during multistep spin-crossover.

Charge-transfer driven by ultrafast spin-transition in a CoFe Prussian blue analogue

2020

Photoinduced charge-transfer is an important process in nature and technology and is responsible for the emergence of exotic functionalities, such as magnetic order for cyanide-bridged bimetallic coordination networks. Despite its broad interest and intensive developments in chemistry and material sciences, the atomic-scale description of the initial photoinduced process, which couples intermetallic charge-transfer and spin transition, has been debated for decades; it has been beyond reach due to its extreme speed. Here we study this process in a prototype cyanide-bridged CoFe system by femtosecond X-ray and optical absorption spectroscopies, enabling the disentanglement of ultrafast electr…

La gestion de la diversité cognitive : l’importance du rôle de coordination des investisseurs en start-ups. Une étude exploratoire

2023

International audience; La diversité cognitive est souvent marquée entre les différents investisseurs (business angels et capital-risqueurs) et les dirigeants de start-up. Cette diversité est à la fois source d’innovation et de mécompréhension entre les acteurs. Elle doit donc être coordonnée pour non seulement assurer la survie de l’entreprise mais aussi lui permettre de se développer dans un environnement technologique turbulent. À l’aide d’une étude de cas longitudinale comparative de deux start-ups en relation avec différents investisseurs, nous menons une étude exploratoire pour investiguer la fonction de coordination cognitive. Nous élaborons un modèle des qualités que doit réunir un …

L'insubordination ouvrière dans les années 68. Essai d'histoire politique des usines

2007

Insubordinations et politisation ouvrières : les occupations d'usine

2008

Caractérisation des modes de coordination interpersonnelle au sein d'une équipe de basket-ball

2008

Characterization of interpersonal coordination modes within a basket-ball team. The aim of our study was to analyze the construction of a collective activity. We focused on interpersonal coordination process within a basket-ball team during a match. We characterized the way how basketball players took mutually into account their respective activities. In order to consider in the same time both units of analysis, the individual one and the collective one, this study referred to the framework of the course of action theory (Theureau, 2006). Results allowed us to specify the relational network between players, the various coordination modes between two players and the different forms of team c…

Pharmaciens et coordination des soins primaires en France : quels enjeux ?

2019

Multi-professional coordination is a strong axis of the reorganization of primary care in France. While this coordination concerns a priori all health professionals, some of them actually are still marginally involved. This article examines the challenges of integrating pharmacists into primary care in France. On the one hand, it is based on an analysis of experiments carried out in other health systems, and on their evaluations. On the other hand, it develops an initial reflection on the levers and obstacles that could explain in France, the poor integration of pharmacists but also on the challenges of a stronger presence of these professionals in the coordination of primary care.

Oxidovanadium(v) complexes with l-proline-based amino acid phenolates

2019

L-proline was used to prepare chiral, tridentate amino acid phenol proligands H2L1—4. These proligands react with vanadium precursors VO(acac)2, VOSO4 ∙ 5 H2O and VO(OPr)3 in methanol to form the corresponding oxidoalkoxidovanadium(V) complexes 1—4. The complexes crystallize from methanol, and are octahedrally coordinated with a general formula [VO(L1—4)(OMe)(MeOH)]. In solution, however, they adopt several different conformations or isomeric structures depending on the solvent. peerReviewed