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Functionalized hyper-cross-linked porous polyacetylenes
Havelková, Lucie
An atom-economic one-step chain-growth coordination homopolymerization providing high yields of functionalized hyper-cross-linked polyacetylenes with permanent micro/mesoporous texture and specific surface area up to 1062 m2 /g was introduced and optimized. Substituted 1,3-diethynylbenzenes served as monomers simultaneously providing functionalization and hyper-cross-linking of the networks. The homopolymerization was compatible with the heteroatom groups of the monomers and allowed to prepare polyacetylene networks with the wide spectrum of univalent functional groups: -F, -Cl, -Br, -NO2, -COOCH3, -CH2OH, -COOH and -CH=O decorating the aromatic segments of the networks in a high extent (7.87 mmol/g). A novel two-step synthesis of functionalized hyper-cross-linked polyacetylenes was introduced combining chain-growth coordination polymerization of acetylenic monomers and covalent templating using acetal and Schiff base protecting groups. By postpolymerization hydrolytic removal of the protecting segments from the primary networks, the networks with a high content (up to 9.61 mmol/g) of univalent functional groups -CH2OH, -CH=O and -NH2 were prepared. These groups were placed either on the cross-linking or linear (aromatic and aliphatic) network segments, even in the vicinity of the main...
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Functionalized hyper-cross-linked porous polyacetylenes
Havelková, Lucie ; Sedláček, Jan (advisor) ; Brožek, Jiří (referee) ; Balcar, Hynek (referee)
An atom-economic one-step chain-growth coordination homopolymerization providing high yields of functionalized hyper-cross-linked polyacetylenes with permanent micro/mesoporous texture and specific surface area up to 1062 m2 /g was introduced and optimized. Substituted 1,3-diethynylbenzenes served as monomers simultaneously providing functionalization and hyper-cross-linking of the networks. The homopolymerization was compatible with the heteroatom groups of the monomers and allowed to prepare polyacetylene networks with the wide spectrum of univalent functional groups: -F, -Cl, -Br, -NO2, -COOCH3, -CH2OH, -COOH and -CH=O decorating the aromatic segments of the networks in a high extent (7.87 mmol/g). A novel two-step synthesis of functionalized hyper-cross-linked polyacetylenes was introduced combining chain-growth coordination polymerization of acetylenic monomers and covalent templating using acetal and Schiff base protecting groups. By postpolymerization hydrolytic removal of the protecting segments from the primary networks, the networks with a high content (up to 9.61 mmol/g) of univalent functional groups -CH2OH, -CH=O and -NH2 were prepared. These groups were placed either on the cross-linking or linear (aromatic and aliphatic) network segments, even in the vicinity of the main...
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Pyrazine Carbonyl Compounds - Building Blocks in Dynamic Combinatorial Systems
Coufal, Radek ; Drahoňovský, Dušan (advisor) ; Jindřich, Jindřich (referee)
This bachelor thesis deals with the synthesis of bifunctional carbonyl derivatives of pyrazine, which are further examined for their potential to form dynamic hemiacetals with monofunctional alcohols. Newly prepared, in the literature not yet described bifunctional trifluormethyl derivatives exhibit considerable ability to form hemiacetals in a dynamic system. The obtained results show that these substances may find application as building blocks of dynamic combinatorial systems.
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Pyrazine Carbonyl Compounds - Building Blocks in Dynamic Combinatorial Systems
Coufal, Radek ; Drahoňovský, Dušan (advisor) ; Jindřich, Jindřich (referee)
This bachelor thesis deals with the synthesis of bifunctional carbonyl derivatives of pyrazine, which are further examined for their potential to form dynamic hemiacetals with monofunctional alcohols. Newly prepared, in the literature not yet described bifunctional trifluormethyl derivatives exhibit considerable ability to form hemiacetals in a dynamic system. The obtained results show that these substances may find application as building blocks of dynamic combinatorial systems.
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