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Sébastien COUFOURIER a obtenu le 1er prix par deux fois pour sa communication orale

Sébastien COUFOURIER, doctorant dans le groupe du Pr. Jean-Luc Renaud, a obtenu à deux reprises le 1er prix pour sa communication orale lors du Groupe d’étude de chimie organométallique & Concertation en chimie de coordination 2018 (GECOM-CONCOORD) ainsi que lors des Journées Nord-Ouest Européennes des Jeunes Chercheurs 2018 (JNOEJC).

 

Voici le résumé de sa communication:

 

Bifunctional Iron Complexes for Catalytic Hydrogenation of Carbon Dioxide and Carbonates.

 Sébastien Coufourier,a Sylvain Gaillard,a Jean-Luc Renaud*a

aNormandie Université, Université de Caen Basse Normandie, Laboratoire de Chimie Moléculaire et Thioorganique
UMR 6507, 14050 Caen, France.

Email: sebastien.coufourier@ensicaen.fr

 While emissions of greenhouse gases reach high levels, fossil fuels still represent 80% of global energy and 95% of our chemical commodities come from non-renewable resources. In this context, the use of CO2 (or carbonates) such as C1 carbon source to produce chemical platforms (methanol, formic acid) would allow its recycling. Actually, the main methods described for the reduction of carbonic derivatives involve reducing agents in stoechiometric amounts that generate toxic wastes. Catalytic hydrogenation appears to be a good alternative to these processes because hydrogen is a cheaper reducing agent and an eco-friendly agent (no by-products produced, except the catalyst, atom economy). Compared to other reduction processes, the hydrogenation of carbon dioxide suffers from little progress. However, some organometallic complexes have been developed in the last decade to achieve such a reaction and some recent reviews highlight these advances.1 But all these efficient catalysts are mainly based on expensive noble metals such as ruthenium and iridium. Due to its abundance and its non-toxicity, iron hydride complexes2 have been recently developed for the reduction of CO2 into formic acid. However, even if these complexes validated the use of environmentally friendly metals in reduction of carbon dioxide, several drawbacks remained unsolved, such as quite high temperatures, high pressures of both hydrogen and CO2 and phosphorous containing ligands. Based on a « transition metal frustrated Lewis pair » approach and on the structure/activity relationship,3-4 we have developed a phosphine free iron complex for the reduction of both hydrogenocarbonate and carbon dioxide.5 These results and a detailed mechanistic study will be presented.

 Acknowledgements: We gratefully acknowledge financial support from the « Ministère de la Recherche et des Nouvelles Technologies », Normandie Université, the « Centre National de la Recherche Scientifique », the « Région Normandie », Ademe agency, and the LABEX SynOrg (ANR-11-LABX-0029).

  1. a) S. Werkmeister, K. Junge, M. Beller, Org. Process Res. Dev. 2014, 18, 289 and references therein. b) F. J. Fernández-Alvarez, A. M. Aitani, L. Oro, Catal. Sci. Technol. 2014, 4, 611. c) Y-N. Li, R. Ma, L-N. He, Z.-F. Diao, Catal. Sci. Technol. 2014, 4, 1498. f) C. Maeda, Y. Myazaki, T. Ema, Catal. Sci. Technol. 2014, 4, 1482.
  2. a) Ziebart, C.; Federsel, C.; Anbarasan, P.; Jackstell, R.; Baumann, W.; Spannenberg, A.; Beller, M. J. Am. Chem. Soc. 2012, 134, 20701. b) Langer, R.; Diskin-Posner, Y.; Leitus, G.; Shimon, L. J. W.; Ben-David, Y.; Milstein, D. Angew. Chem. Int. Ed. 2011, 50, 9948. c) Bertini, F.; Mellone, I.; Ienco, A.; Peruzzini, M.; Gonsalvi, L. ACS Catal. 2015, 5, 1254.
  3. a) Pagnoux-Ozherelyeva, A.; Pannetier, N.; Mbaye, M. D.; Gaillard, S.; Renaud, J.-L. Angew. Chem. Int. Ed. 2012, 51, 4976. b) Moulin, S.; Dentel, H.; Pagnoux-Ozherelyeva, A.; Gaillard, S.; Poater, A.; Cavallo, L.; Lohier, J.-F.; Renaud, J.-L. Chem. Eur. J. 2013, 19, 17881.
  4. Thai T-T.; Mérel, D. S.; Poater, A.; Gaillard, S.; Renaud, J.-L. Chem. Eur. J. 2015, 21, 7066-7070.
  5. Coufourier, S.; Mérel, D. S.; Thai, T-T.; Poater, A.; Gaillard, S.; Renaud, J.-L. in preparation.

 

 

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