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TY - THES AU - Grabowski, Frédéric TI - Compartmentalized catalytically active microgels with copper </td><td width="150"> TI - amp; zinc complexes PB - RWTH Aachen University VL - Dissertation CY - Aachen M1 - RWTH-2026-00359 SP - 1 Online-Ressource : Illustrationen PY - 2025 N1 - Veröffentlicht auf dem Publikationsserver der RWTH Aachen University 2026 N1 - Dissertation, RWTH Aachen University, 2025 AB - The development of suitable carrier systems for catalysts represents a significant challenge. In particular, the compartmentalization of transition metal-complexes, which belong to the type of homogeneous catalysts and are dissolved in liquids, is of great interest in order to improve chemical reactions in terms of controllability and recyclability. Therefore, modern polymer science is focusing on the immobilization of catalysts on responsive polymer materials. These include microgels, which are three-dimensional crosslinked, porous, soft, and mainly spherical polymer colloids. Microgels exhibit responsive properties to external stimuli, such as temperature, that can additionally be used to control catalytic reactions. The present Thesis focuses on the compartmentalization of different transition metal-complexes into responsive microgels for the application as catalytic carrier systems. First, the microgel morphology is influenced by localization of different pyrazolyl-modified monomers, which are pre-selected by computer-guided simulations to obtain anisotropic microgels. Subsequently, the synthesized pyrazolyl-modified microgels are loaded with copper(II) to form the corresponding complex in the microgel. By comparing and combining analytical methods from the copper(II) complexation studies of the pyrazolyl-modified monomers with the microgels, the predominant complex within the microgels is identified. The catalytic performance of the copper(II)-pyrazolyl-complex modified microgels is investigated regarding the morphology, localization, and contents of the complex in the microgel in nitroaldol (Henry) reactions. Afterwards, the best performing catalytic microgel is used in an up-scaled continuous Henry reaction for multiple cycles. The gained insights are used to prepare zinc(II)-guanidine-complex modified microgels. For this purpose, optimization reactions are carried out for the synthesis of guanidine-modified microgels. The resulting guanidine-modified microgels are in part loaded with zinc(II). At the end, the zinc(II)-guanidine-complex modified as well as the guanidine-modified microgels are evaluated for their catalytic performance in the depolymerization of polylactide and examined for their recyclability. The Thesis shows that responsive microgels are suitable carrier systems for various metalcomplexes, enhancing their catalytic performance and recyclability. LB - PUB:(DE-HGF)11 DO - DOI:10.18154/RWTH-2026-00359 UR - https://publications.rwth-aachen.de/record/1024836 ER -