Talk given by Prof. Walter Leitner Institut für Technische Chemie und Makromolekulare Chemie (ITMC) RWTH Aachen Aachen, Germany Abstract: Metal nanoparticles are of major importance in catalysis. Their controlled synthesis from organometallic precursors has emerged as fruitful link between the traditional fields of “homogeneous” and “heterogeneous” catalysis. Whereas the ligands control the reactivity of isolated metal centers in coordination compounds, the stabilizing matrix (e.g. polymer, solvent, or support) becomes a critical control factor for the metal assemblies on a nanoscale. In the present talk, we will discuss the potential of advanced fluids such as supercritical carbon dioxide (scCO2), ionic liquids (ILs) and polyethylenglyocol (PEG) for the preparation and application of such materials. Examples from our laboratories include Pd catalysts for selective oxidation [1], Co catalysts for C-C bond formation [2], and Rh [3] and Ru [4] catalysts for hydrogenation reactions. In particular, the potential of combining the stabilizing effect of IL-type matrices with the controlled introduction of additional molecular functionalities will be highlighted [5,6]. Finally, extension of the approach to bimetallic systems is presented, offering the opportunity to generate catalytically active materials with unique properties that cannot be achieved with the individual metals alone [7]. [1] a) Z. Hou, N. Theyssen, A. Brinkmann, W. Leitner, Angew. Chem. Int. Ed. Engl. 2005, 44, 1346-1349; b) Z. Hou, N. Theyssen, W. Leitner, Green Chemistry 2007, 9, 127-132; c) Z. Hou, N. Theyssen, A. Brinkmann, K. V. Klementiev, W. Grünert, M. Bühl, W. Schmidt, B. Spliethoff, B. Tesche, C. Weidenthaler, W. Leitner, J. Catal. 2008, 258, 315-323; d) S.K. Karmee, L. Greiner, A. Kraynov, T.E. Müller, B. Niemeijer, W. Leitner, Chem. Commun. 2010, 6705-6707 [2] a) J.-L. Muller, J. Klankermayer, W. Leitner, Chem. Commun. 2007, 1939-1941; b) J.-L. Muller, A. Rickers, W. Leitner, Adv. Synth. Catal. 2007, 349, 287-291. [3] V. Cimpeanu, M. Kocevar, V.I. Parvulescu, W. Leitner, Angew. Chem. Int. Ed. 2009, 48, 1085-1088. [4] a) J. Julis M. Hölscher, W. Leitner, Green Chem. 2010, 12, 1634-1639; b) J. Julis, W. Leitner, Angew. Chem. Int. Ed. 2012, 51, 8615-8619 [5] a) K. L. Luska, J. Julis, E. Stavitski, D. N. Zakharov, A. Adams, W. Leitner, Chem. Sci. 2014, 5, 4895-4905; b) K.L. Luska, P. Migowski, S. El Sayed, W. Leitner, Angew. Chem. Int. Ed. 2015, 54, 15750-15755. [6] for a review, see: K. L. Luska, P. Migowski, W. Leitner, Green Chem. 2015, 17, 3195-3206. [7] K. L. Luska, A. Bordet, S. Tricard, I. Sinev, W. Grünert, B. Chaudret, W. Leitner, ACS Catal. 2016, 6, 3719−3726.

This event is part of the eventgroup INT Talks

Homepage
https://www.int.kit.edu/events.php

Speaker
Prof. Walter Leitner

Institut für Technische Chemie und Makromolekulare Chemie (ITMC), RWTH Aachen
http://www.tc.rwth-aachen.de/aw/cms/TC/Zielgruppen/~vft/prof-leitner/?lang=de

Organizer
Prof. Mario Ruben
Institut für Nanotechnologie
KIT
Hermann-von-Helmholtz-Platz 1
76344 Eggenstein-Leopoldshafen
Mail: mario ruben ∂does-not-exist.kit edu
https://www.int.kit.edu/1938_mario.ruben.php

Targetgroup
Interested / Everyone