May the Force be with you – new insights in mechanochemical processes using real-time in situ investigations
Séminaire Chimie ED459
Dr. Franziska
Le Jeudi 24 janvier 2019 à 10h30
Institut Européen des Membranes, salle de conférences (campus Balard Bât. 40, 300 avenue Émile-Jeanbrau)
Date de début : 2019-01-24 10:30:00
Date de fin : 2019-01-24 12:00:00
Lieu : IEM salle de conférences (300 av. Jeanbrau)
Intervenant : Dr. Franziska
BAM Federal Institute for Materials Research and Testing, Berlin, Germany
Mechanochemistry is a fast and efficient method applicable for the synthesis of new organic,[1] metal-organic,[2] and inorganic[3] compounds. The direct monitoring of milling reactions is still challenging. The underlying reaction mechanisms remain often unclear. In the last years, have established a tandem in situ approach for investigating mechanochemical reactions using time-resolved in situ XRD coupled with Raman spectroscopy.[4] Here, we present an in situ coupling of synchrotron XRD, Raman spectroscopy, and thermography allowing the observation of mechanochemical reactions in real time.[5] Information on the crystalline, molecular, and temperature state of the materials during grinding could be collected. The chemical composition of the reaction mixture was found to be directly correlated with changes in the temperature profile of the reaction. Furthermore, the presented setup allows the detection of crystalline, amorphous, eutectic as well as liquid intermediates. The resulting deeper kinetic and thermodynamic understanding of milling processes is the key for future optimization of mechanochemical syntheses.
References
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2. A. L. Garay, A. Pichon, S. L. James, Chem. Soc. Rev. 2007, 36, 846–855.
3. P. Balaz, M. Achimovicova, M. Balaz, P. Billik, Z. Cherkezova-Zheleva, J. M. Criado, F. Delogu, E. Dutkova, E. Gaffet, F. J. Gotor, R. Kumar, I. Mitov, T. Rojac, M. Senna, A. Streletskii, K. Wieczorek-Ciurowa, Chem. Soc. Rev. 2013, 42, 7571–7637.
4. L. Batzdorf, F. Fischer, M. Wilke, K. J. Wenzel, F. Emmerling, Angew. Chem. Int. Ed. 2015, 54, 1799–1802.
5. H. Kulla, S. Haferkamp, I. Akhmetova, M. Rollig, C. Maierhofer, K. Rademann, F. Emmerling, Angew. Chem. Int. Ed. 2018, 57, 5930–5933.
Contacts locaux Balard :
Dr. Danielle
Dr. Thomas-Xavier
