Les séminaires CulturChem

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    03.07.2017 - 03.07.2017

    Adventures in spin-crossover phenomena : from molecules with memory to multifunctional synergy

    Séminaire du Pr José R. Galan-Mascaros (ICIQ, Tarragona, Espagne)
    Abstract :
    Spin crossover (SC) compounds are bistable materials, where the magnetic state can be tuned from a low-spin configuration into a low-lying meta-stable high-spin configuration through external stimuli. The coordination chemistry of triazole (trz) ligands with FeII centers has delivered remarkable compounds, as those exhibiting...
    

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    26.06.2017 - 26.06.2017

    Dynamic expression of multivalency in nucleic acid recognition

    Séminaire du Dr Sébastien Ulrich (CNRS-IBMM, Montpellier)
    Abstract :
    Our research is directed toward the generation of “smart” bioactive systems for gene delivery applications. In this talk, we will present examples where we used dynamic covalent chemistry for generating self-assembled materials – such as peptide-based clusters and biopolymers – which dynamically express an effective multivalent recognition...
    

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    19.06.2017 - 19.06.2017

    Helical Foldamers: Highly Modular Scaffolds for Molecular Recognition

    Séminaire du Dr Yann Ferrand (CBMN, Université de Bordeaux)
    Abstract :
    Our group has developed helical foldamers – oligomers that adopt stable helical folded conformations – derived from aromatic amino acids. Some of these folded objects have shown unprecedented conformational stability even in water, and constitute convenient building blocks to elaborate synthetic, very large (protein-sized) folded...
    

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    12.06.2017 - 12.06.2017

    Quand les radicaux viennent à l’aide de la RMN : une conception rationnelle pour une hyperpolarisation efficace

    Séminaire du Dr Olivier Ouari (Aix Marseille Université)
    Abstract :
    La technique de Polarisation Dynamique Nucléaire (PDN) attire actuellement un grand intérêt comme étant une des techniques les plus efficaces pour augmenter la sensibilité de la RMN (et de l'IRM). Le principe de la PDN repose sur le transfert de la plus grande polarisation des spins électroniques vers les spins nucléaires au moyen d’une...
    

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    29.05.2017 - 29.05.2017

    From lab to field : selected cases from agrochemistry

    Séminaire du Dr David Bernier (Bayer CropScience, Lyon, France)
    Abstract :
    By 2050, the land area available for agriculture is expected to decrease significantly while the world population would grow from ~7 to over 9 billion people. Keeping access to quality food at an acceptable price will therefore constitute a considerable challenge. In this presentation, some examples of agrochemical innovation...
    
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    15.05.2017 - 15.05.2017

    C-O bond breaking and bond forming strategies: lessons from biology and heterogeneous biofuels catalysts

    Séminaire du Prof Rachel N. Austin (Barnard College of Columbia University, USA)
    Abstract
    Several mechanistic strategies for the selective catalytic addition and removal of oxygen atoms from organic molecules will be presented.  An effort to find common themes in the high-valent iron strategies nature uses and the lower valent ruthenium-based approaches our lab has developed in a series of heterogeneous...
    

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    24.04.2017 - 24.04.2017

    Indoles Electrophiles et Désaromatisation pour la Synthèse de Substances Naturelles

    Séminaire du Dr Guillaume Vincent (ICMMO, Université Paris Sud / Paris Saclay
    Abstract :
    The nucleophilicity of the indole nucleus at C3 is well established. In contrast the electrophilic character of indoles has been less studied but is a fascinating emerging topic.We are particularly interested in the generation of sp3 carbon centers through the reaction of the C2=C3 bond of indoles.
    We took advantage...
    

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    27.03.2017 - 27.03.2017

    Radical C-H Activation/Radical-Radical Cross-Coupling

    Séminaire du Pr Aiwen Lei (IAS, Wuhan University, China)
    Abstract
    Our research focuses on the oxidative coupling to develop a novel and efficient bond-formation method between two nucleophiles. We have successfully developed three generations of oxidative coupling. In addition, in-depth understanding toward the reactions is the other focus. Recently, a new series of oxidative coupling reactions have...
    

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    20.03.2017 - 20.03.2017

    Recent Studies of Electron Transfer in Organic Chemistry

    Séminaire du Pr John A. Murphy (University of Strathclyde, Glasgow, United Kingdom)
    Abstract
    Electron transfer reactions are of central importance in nature and in synthetic chemistry. This presentation will describe recent progress in our laboratories in developing new reactions that are mediated by electron transfer, as well as in probing the mechanism of electron transfer reactions.
    

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    13.03.2017 - 13.03.2017

    More than an analytical method ! Unsing Mass Spectrometry to Build Bridges between Gas and Solution Phase Metal Chemistry

    Séminaire du Pr Richard A. J. O'Hair (The University of Melbourne, Australia)
    Abstract
    Mass spectrometry based techniques have been developed over the past 50 years to provide fundamental structural, mechanistic and energetic information about intermediates and reactions associated with metal mediated processes, including catalytic cycles [1]. Many early studies involved the reactions of bare monoatomic...
    
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    06.03.2017 - 06.03.2017

    Copper(I/II) complexes with the peptide amyloïd-ß: structure, reactivity and biological relevance

    Séminaire du Pr Peter Faller (Institut de chimie de Strasbourg, Université de Strasbourg)
    Abstract
    Copper is an essential element and is needed for several essential purposes such as energy production. Copper ions are generally tightly bound at specific sites to proteins. Copper inappropriately bound, often called labile or loosely bound copper, can be a very good catalyst for the production of reactive...
    

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    27.02.2017 - 27.02.2017

    Biomaterials : materials chemistry in a medical context

    Séminaire du Dr Thibaud Coradin (LCMCP, UPMC)
    Abstract
    The development of biomaterials requires the convergence of multiple expertises at the service of medicine. Chemistry plays a key role in imagining and constructing objects that will induce the adequate response of the body. However, combining functionality and biocompatibility remains a great challenge, as it implies a control of chemical and...
    

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    20.02.2017 - 20.02.2017

    Homogeneous catalysis for the transformation of renewables

    Séminaire du Dr Cédric Fischmeister (Institut des Sciences Chimiques de Rennes, Université de Rennes 1)
    Abstract
    The transformation of renewable and bio-sourced compounds is a major challenge for present and future chemical research. In this context, catalytic processes will play a major role to ensure efficient transformations with reduced environmental impacts. Our results on the implementation of...
    

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    13.02.2017 - 13.02.2017

    Molécules et nanoparticules d'or sur silicium : contrôler la morphologie du matériau et le fonctionnaliser pour l'électronique moléculaire

    Séminaire du Dr Olivier Pluchery (INSP, UPMC)
    Abstract
    Le silicium est un matériau fort de 60 ans au service de l'électronique. Il affiche des promesses renouvelées dans le domaine du photovoltaïque, de l'électronique moléculaire et le développement de composants toujours plus petits qui faciliteront la transition de la micro- vers la nano-électronique. Dans mon exposé je détaillerai nos travaux de
    

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    06.02.2017 - 06.02.2017

    Small, Functional Rotaxanes

    Séminaire du Dr Steve Goldup (University of Southampton)
    Abstract
    Our group have pioneered the use of “small” macrocycles in active template reactions in order to allow the synthesis of small(er), functionalised rotaxanes in excellent yield. I will describe some of our recent applications of this methodology to the synthesis of complex homo- and hetero-circuit [n]rotaxanes, as well as functional interlocked...
    
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    30.01.2017 - 30.01.2017

    Materials Exploration for Advanced Batteries

    Séminaire du Pr Masashi Okubo (The University of Tokyo, Japon)
    Abstract
    Limited performance of lithium-ion batteries forces us to develop advanced batteries. However, the presently-considered electrode materials are ion intercalation (carbon compounds, metal oxides and metal sulfides), alloying (phosphorus and tin) or conversion materials (metal oxides and metal sulfides), the energy and power densities...
    

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    23.01.2017 - 23.01.2017

    Une réponse radicale à quelques défis du magnétisme moléculaire

    Séminaire du Pr Cyrille Train (Université Grenoble-Alpes)
    Abstract
    Le magnétisme des objets moléculaires s’appuie sur la présence d’entités paramagnétiques. Historiquement, les ions métalliques ont pris le pas sur les radicaux organiques notamment en raison des impératifs de stabilité. Cependant, les radicaux organiques sont susceptibles d’assurer de fortes interactions d’échange. Utiliser des radicaux...
    

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    16.01.2017 - 16.01.2017

    New Catalytic Chemistry for Heterocycle Synthesis

    Séminaire du Pr Michael F. Greaney (University of Manchester, UK)
    Abstract
    Transition metal (TM) catalysts can control a vast range of chemical reactivity. At one extreme, they can hatness and modulate the most energetic reactive intermediates, such as arynes and carbenes. Contrastingly, they can be used to activate inert, unreactive functional groups such as C-H bonds. Both of these areas offer tremendous...
    

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    09.01.2017 - 09.01.2017

    Design and Reactivity of Gold(III) complexes : Towards New Opportunities in Gold catalysis

    Séminaire du Dr. Abderrahmane Amgoune (Toulouse University, LHFA UMR 5069)
    Abstract
    In most gold catalyzed processes developed to date, gold(I) is used as a simple Lewis acid for electrophilic activation of p-CC bonds. This represents a severe restriction synthetically, and in this respect, gold is well behind the other transition metals that are known to promote a much greater variety of transformations...
    

  • 05.12.2016 - 16.12.2016

    Présences CulturChem 2016-2017

    Présences CulturChem 2016-2017