Plasma-Assisted Immobilization of a Phosphonium Salt and Its Use as a Catalyst in the Valorization of CO 2 .

Autor: Hu Y; Leibniz-Institute for Catalysis at the University of Rostock, Albert-Einstein-Strasse 29a, 18059, Rostock, Germany., Peglow S; Leibniz-Institute for Plasma Science and Technology (INP), Felix-Hausdorff-Strasse 2, 17489, Greifswald, Germany., Longwitz L; Leibniz-Institute for Catalysis at the University of Rostock, Albert-Einstein-Strasse 29a, 18059, Rostock, Germany., Frank M; Medical Biology and Electron Microscopy Center, University Medicine Rostock, Stremelstrasse 14, 18057, Rostock, Germany.; Department Life, Light & Matter, University of Rostock, Albert-Einstein-Strasse 25, 18059, Rostock, Germany., Epping JD; Institute of Chemistry, Technical University of Berlin, Strasse des 17 Juni 135, 10623, Berlin, Germany., Brüser V; Leibniz-Institute for Plasma Science and Technology (INP), Felix-Hausdorff-Strasse 2, 17489, Greifswald, Germany., Werner T; Leibniz-Institute for Catalysis at the University of Rostock, Albert-Einstein-Strasse 29a, 18059, Rostock, Germany.
Jazyk: angličtina
Zdroj: ChemSusChem [ChemSusChem] 2020 Apr 07; Vol. 13 (7), pp. 1825-1833. Date of Electronic Publication: 2020 Mar 17.
DOI: 10.1002/cssc.201903384
Abstrakt: The first plasma-assisted immobilization of an organocatalyst, namely a bifunctional phosphonium salt in an amorphous hydrogenated carbon coating, is reported. This method makes the requirement for prefunctionalized supports redundant. The immobilized catalyst was characterized by solid-state 13 C and 31 P NMR spectroscopy, SEM, and energy-dispersive X-ray spectroscopy. The immobilized catalyst (1 mol %) was employed in the synthesis of cyclic carbonates from epoxides and CO 2 . Notably, the efficiency of the plasma-treated catalyst on SiO 2 was higher than those of the SiO 2 support impregnated with the catalyst and even the homogeneous counterpart. After optimization of the reaction conditions, 13 terminal and four internal epoxides were converted with CO 2 to the respective cyclic carbonates in yields of up to 99 %. Furthermore, the possibility to recycle the immobilized catalyst was evaluated. Even though the catalyst could be reused, the yields gradually decreased from the third run. However, this is the first example of the recycling of a plasma-immobilized catalyst, which opens new possibilities in the recovery and reuse of catalysts.
(© 2020 The Authors. Published by Wiley-VCH Verlag GmbH & Co. KGaA.)
Databáze: MEDLINE
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