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X-WR-CALDESC:Évènements pour IS2M
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DTSTART;TZID=Europe/Paris:20190314T143000
DTEND;TZID=Europe/Paris:20190314T160000
DTSTAMP:20190311T081935Z
CREATED:20190311T074504Z
LAST-MODIFIED:20190311T081935Z
UID:5063-1552573800-1552579200@www.is2m.uha.fr
SUMMARY:Quadrupolar carbo-benzenes: synthesis\, optical and supra-molecular properties
DESCRIPTION:Prof. Rémi CHAUVIN\, Laboratory of Coordination Chemistry\, Paul Sabatier University\, Toulouse\, France\nWhile general « Carbo-mers » are expanded versions of parent molecules defined by « dicarbon enrichment »\,[1] carbo-benzenes are benchmark representatives for benzenic parents.[2] As benzene\, C6H6\, carbo-benzene\, C18H6\, satisfies the Hückel rule for aromaticity (number of πz electron = 4n+2 for n = 1 and n=4\, respectively)\, thus predicting augmented stability of the a priori quite reactive sp-carbon-rich empty C18 macrocycle. This has been demonstrated by both computational and experimental results. In this lecture\, unique structural features\, synthesis methods\, characterizations\, and physical properties of p-difunctional carbo-benzene derivatives will be presented.[3] Focus will be first given to selected chromophoric properties\, such as porphyrin-like one-photon absorption ability\,[4] dichromism in solution\,[5] and two-photon absorption.[6]  Further emphasis will be then given to strategies devised to address the recurring issue of the poor solubility of carbo-benzenes. Their supra-molecular interactions in the crystal\, liquid crystal\, and solution states will be addressed from several examples.[7] \nReferences \n[1] R. Chauvin\, Tetrahedron Lett. 1995\, 37\, 397. \n[2] (a) Y. Kuwatani\, N. Watanabe\, I. Ueda\, Tetrahedron Lett. 1995\, 36\, 119; (b) R. Chauvin\, Tetrahedron Lett. 1995\, 37\, 401; © K. Cocq\, C. Lepetit\, V. Maraval\, R. Chauvin\, Chem. Soc. Rev. 2015\, 44\, 6535-6559. \n[3] (a) Z. Li\, M. Smeu\, A. Rives\, V. Maraval\, R. Chauvin\, M. A. Ratner\, E.  Borguet\, Nature Commun. 2015\, 6:6321; (b) K. Cocq\, N. Saffon-Merceron\, Y. Coppel\, C. Poidevin\, V. Maraval\, R.  Chauvin\, Angew. Chem. Int. Ed. 2016\, 55\, 15133. © K. Cocq\, C. Barthes\, A. Rives\, V. Maraval\, R. Chauvin\, Synlett 2019\, 30\, 30. \n[4] D. Listunov\, C. Duhayon\, A. Poater\, S. Mazères\, A. Saquet\, V. Maraval\, R. Chauvin\, Chem. Eur. J. 2018\, 24\, 10699\, and references therein. \n[5] L. Leroyer\, C. Lepetit\, A. Rives\, V. Maraval\, N. Saffon-Merceron\, D. Kandaskalov\, D. Kieffer\, R. Chauvin\, Chem. Eur. J. 2012\, 18\, 3226-3240 \n[6] I. Baglai\, M. de Anda-Villa\, R. M. Barba-Barba\, C. Poidevin\, G. Ramos-Ortíz\, V. Maraval\, C. Lepetit\, N. Saffon-Merceron\, J. L. Maldonado\, R. Chauvin\, Chem. Eur. J. 2015\, 21\, 14186. \n[7] (a) C C. Zhu\, T.-H. Wang\, C.-J. Su\, S.-L. Lee\, A. Rives\, C. Duhayon\, B. Kauffmann\, V. Maraval\, C.-h. Chen\, H.-F. Hsu\, R. Chauvin\, Chem. Commun. 2017\, 53\, 5902. (b) Zhu\, A. Poater\, C. Duhayon\, B. Kauffmann\, A. Saquet\, V. Maraval\, R. Chauvin\, Angew. Chem. Int. Ed.  2018\, 57\, 5640.
URL:https://www.is2m.uha.fr/event/quadrupolar-carbo-benzenes-synthesis-optical-and-supra-molecular-properties/
LOCATION:Amphithéâtre de l’IS2M\, 15 rue jean starcky\, Mulhouse\, Mulhouse\, 68057\, France
ATTACH;FMTTYPE=image/jpeg:https://www.is2m.uha.fr/wp-content/uploads/2019/03/chauvin.jpg
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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20190327T123000
DTEND;TZID=Europe/Paris:20190327T130000
DTSTAMP:20190322T092017Z
CREATED:20190311T081210Z
LAST-MODIFIED:20190322T092017Z
UID:5073-1553689800-1553691600@www.is2m.uha.fr
SUMMARY:Séminaire interne
DESCRIPTION:JEED (budsaraporn.surajarusarn@uha.fr) will present her work focused on \n« Development of rubber composite reinforced with pineapple leaf fiber and aramid fiber » \nIn recent years\, natural fiber has received a lot of attention as reinforcing material in polymer composites due to several advantages.  It can be used as alternative replacement for synthetic fiber In order to develop pineapple leaf fiber reinforced composites for commercial utilization\, it is important that we have industrial composite for comparison. Aramid fiber is one of important synthetic fiber that is widely used in many applications and it might be a standard fiber for industry in the future. Thus it will be used as a benchmark in the project.
URL:https://www.is2m.uha.fr/event/seminaire/
LOCATION:15 rue starcky salle 204
ATTACH;FMTTYPE=image/jpeg:https://www.is2m.uha.fr/wp-content/uploads/2019/03/jeed.jpg
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DTSTART;TZID=Europe/Paris:20190328T112000
DTEND;TZID=Europe/Paris:20190328T120000
DTSTAMP:20190312T093206Z
CREATED:20190311T075633Z
LAST-MODIFIED:20190312T093206Z
UID:5069-1553772000-1553774400@www.is2m.uha.fr
SUMMARY:Conférence Grand Public- Erwan Poupon
DESCRIPTION:Prof. Erwan POUPON\, de l’Université Paris-Sud et l’Université Paris-Saclay sur « Aventures dans le monde des substances naturelles : anticiper\, explorer\, comprendre la complexité moléculaire  »  \n  \nLes « substances naturelles » sont produites par les êtres vivants de façon spécifique. Elles sont au cœur de l’évolution darwinienne et participent pleinement à l’adaptation à l’environnement. Elles présentent parfois une complexité moléculaire absolument fascinante que nous essayons\, au laboratoire\, de comprendre et d’exploiter. Beaucoup des réseaux métaboliques\, qui à partir d’éléments biochimiques très simples\, permettent de construire des architectures moléculaires si complexes\, sont encore très peu connus. De la prospection de la biodiversité jusqu’à la synthèse organique en passant par le développement d’outils bio-informatiques puissants\, nous essaierons de montrer comment il est aujourd’hui possible d’anticiper\, d’explorer et de comprendre l’émergence de la complexité moléculaire dans la nature. Le propos sera replacé systématiquement dans un contexte évolutif et nous verrons s’il est toujours possible de comprendre « la raison d’être » de ces substances naturelles… \nQuelques exemples didactiques seront pris parmi les travaux récents de l’équipe.
URL:https://www.is2m.uha.fr/event/conference-grand-public-erwan-poupon/
LOCATION:Amphi 1 – ENSCMu\, 3 rue Werner\, Mulhouse\, France
ATTACH;FMTTYPE=image/png:https://www.is2m.uha.fr/wp-content/uploads/2019/03/erwan-poupon.png
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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20190328T143000
DTEND;TZID=Europe/Paris:20190328T160000
DTSTAMP:20190321T131310Z
CREATED:20190321T131310Z
LAST-MODIFIED:20190321T131310Z
UID:5202-1553783400-1553788800@www.is2m.uha.fr
SUMMARY:Structural properties\, dynamical behaviour and reactivity of nanomaterials by electron microscopy
DESCRIPTION:Prof. Ovidiu ERSEN\nInstitut de Physique et de Chimie des Matériaux de Strasbourg\n\n\nThe optimization of the properties of the nanomaterials requires in-depth analysis of their structural\, morphological and chemical features. In a transmission electron microscope (TEM)\, combining the classical imaging and spectroscopic modes with the 3D and in-situ approaches allows uncovering materials 3D characteristics\, properties and dynamical behaviour. A special focus is put here on three modes: in-situ TEM\, quantitative tomography and operando environmental TEM. The in-situ TEM is adapted for assessing the evolution of nanostructures in real time under thermal or electrical constraints\, the electron tomography gives access to quantitative analysis of their 3D structural and chemical parameters\, whilst the operando TEM offers an elegant solution for solving their behaviour under realistic environmental conditions. For instance\, in the field of the heterogeneous catalysis\, the analysis of the reaction products by a residual gas analyser simultaneously to the environmental gas TEM study allows us to correlate the microstructural changes in the catalysts with the catalytic activity and selectivity. In electrocatalysis\, by tracking the behaviour of electrocatalyst nanoparticles in operando conditions by liquid electrochemical TEM\, it was possible to observe the progressive structural transition at the surface of the particles during a potentiodynamic electrochemical measurement. From a fundamental point of view\, by applying the liquid TEM to the study of nucleation and growth processes of metal nanoparticles\, a typical behaviour consisting in a self-organisation process of molecules in micellar structures\, before the particle formation\, was evidenced. The aim of this talk is to illustrate through highlighting examples the recent progress in the use of TEM to fulfil the gap between the development of new nanomaterials and nanostructures\, their characterization and subsequent properties. More generally\, this contribution aims at providing to materials scientists a representative set of studies for illustrating the capabilities of the modern TEMs that can be transposed to their own research.
URL:https://www.is2m.uha.fr/event/structural-properties-dynamical-behaviour-and-reactivity-of-nanomaterials-by-electron-microscopy/
LOCATION:Amphithéâtre de l’IS2M\, 15 rue jean starcky\, Mulhouse\, Mulhouse\, 68057\, France
ATTACH;FMTTYPE=image/jpeg:https://www.is2m.uha.fr/wp-content/uploads/2019/03/confovidiu.jpg
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