Selective catalytic hydrogenations in a microfluidics-based high throughput flow reactor on ion-exchange supported transition metal complexes: A modular approach to the heterogenization of soluble complex catalysts |
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| Affiliation: | 1. Institute of Physical Chemistry, University of Debrecen, Debrecen H-4010, Hungary;2. Research Group of Homogeneous Catalysis, Hungarian Academy of Sciences, P.O. Box 7, Debrecen H-4010, Hungary;3. Thales Nanotechnology, Záhony u. 7, Budapest, H-1031, Hungary;1. School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400030, China;2. Center of Basic Molecular Science (CBMS), Department of Chemistry, Tsinghua University, Beijing 100084, China;3. College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, China;1. Doctoral School of Molecular- and Nanotechnologies, University of Pannonia, Veszprem, Hungary;2. Nanobiosensorics Group, Institute of Technical Physics and Materials Science, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Hungary;1. ETH Zürich, Department of Chemistry and Applied Biosciences, Vladimir-Prelog-Weg 1-5, CH-8093 Zürich, Switzerland |
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| Abstract: | Water-soluble ruthenium(II) and rhodium(I) complexes containing monosulfonated triphenylphosphine (mtppms) ligands were immobilized on commercially available anion-exchangers. The resulting solid catalysts were suitable for use in a microfluidics-based flow reactor (H-Cube?) of high throughput capability. With the heterogenized {RuCl2(mtppms)2}2] disubstituted alkynes were hydrogenated to cis-alkenes with up to 85% selectivity, while the use of the immobilized RhCl(mtppms)3] yielded 1,2-diphenylethane as the major product. The ruthenium catalyst also reduced trans-cinnamaldehyde to 3-phenylpropanal selectively and catalyzed the isomerization of 1-octen-3-ol to octan-3-one. This simple and versatile method of the immobilization of water-soluble complexes yields active and durable molecularly dispersed yet solid catalysts. |
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