The thesis focuses on the synthesis of thermoresponsive oligomeric catalysts based on Hemin, a naturally occurring iron-porphyrin insoluble in water. Hemin was copolymerized with a hydrophilic monomer (e.g. oligo(ethylene glycol) methacrylate), generating a library of water-soluble oligomeric catalysts (pHemin). The catalysts of the pHemin family were found to be active in mediating a series of reactions including: i) controlled radical polymerization in an aqueous medium, and ii) electrochemical reduction of carbon dioxide. Furthermore, the choice of hydrophilic oligomers imparted a thermoresponsive character to the pHemin catalyst. Consequently, at the end of its use, the catalyst was separated from the reaction mixture thanks to a simple temperature variation.
La tesi verte sulla sintesi di catalizzatori oligomerici termoresponsivi a base di Emina, una Ferro-porfirina di origine naturale insolubile in acqua. L'emina è stata copolimerizzata con un monomero idrofilico (e.g. oligo(ethylene glycol) methacrylate), generando una libreria di catalizzatori oligomerici solubili in acqua (pHemin). I catalizzatori della famiglia pHemin sono risultati attivi nel mediare una serie di reazioni che includono: i) polimerizzazione radicalica controllata in ambiente acquoso, ii) riduzione elettrochimica di anidride carbonica. Inoltre, la scelta degli oligomeri idrofilici ha impartito un carattere termoresponsivo al catalizzatore pHemin. Di conseguenza, al termine del suo utilizzo il catalizzatore è stato separato dalla miscela di reazione grazie ad una semplice variazione di temperatura.
Sintesi e Caratterizzazione di Catalizzatori Termoresponsivi a Base di Emina
BROCCHINI, MATTIA
2022/2023
Abstract
The thesis focuses on the synthesis of thermoresponsive oligomeric catalysts based on Hemin, a naturally occurring iron-porphyrin insoluble in water. Hemin was copolymerized with a hydrophilic monomer (e.g. oligo(ethylene glycol) methacrylate), generating a library of water-soluble oligomeric catalysts (pHemin). The catalysts of the pHemin family were found to be active in mediating a series of reactions including: i) controlled radical polymerization in an aqueous medium, and ii) electrochemical reduction of carbon dioxide. Furthermore, the choice of hydrophilic oligomers imparted a thermoresponsive character to the pHemin catalyst. Consequently, at the end of its use, the catalyst was separated from the reaction mixture thanks to a simple temperature variation.File | Dimensione | Formato | |
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https://hdl.handle.net/20.500.12608/47463