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Microporous hyper-cross-linked polyacetylene networks: covalent structure and texture modification by reversible Schiff-base chemistry
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SYSNO ASEP 0532071 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Microporous hyper-cross-linked polyacetylene networks: covalent structure and texture modification by reversible Schiff-base chemistry Author(s) Bashta, B. (CZ)
Hašková, A. (CZ)
Faukner, T. (CZ)
Elsawy, M. A. (CZ)
Šorm, D. (CZ)
Brus, Jiří (UMCH-V) RID, ORCID
Sedláček, J. (CZ)Article number 109914 Source Title European Polymer Journal. - : Elsevier - ISSN 0014-3057
Roč. 136, 5 August (2020), s. 1-14Number of pages 14 s. Language eng - English Country GB - United Kingdom Keywords hyper-cross-linked network ; microporous material ; polyacetylene Subject RIV CD - Macromolecular Chemistry OECD category Polymer science R&D Projects GA20-01233S GA ČR - Czech Science Foundation (CSF) Method of publishing Limited access Institutional support UMCH-V - RVO:61389013 UT WOS 000562571200013 EID SCOPUS 85088994756 DOI 10.1016/j.eurpolymj.2020.109914 Annotation We present controlled de-cross-linking and detemplating for modifying the porosity and covalent structure of porous organic polymers. HC≡C-C6H4-CH=N-C6H4-N=CH-C6H4-C≡CH and HC≡C-C6H4-N=CH-C6H4-CH=N-C6H4-C≡CH type monomers (-C6H4- is meta- and para-phenylene) having two polymerizable ethynyl groups and two hydrolysable azomethine groups per molecule were copolymerized with 4,4-diethynylbiphenyl and tetrakis(4-ethynylphenyl)methane into porous polyacetylene-type hyper-cross-linked networks. Two types of cross-links were involved in cross-linking: hydrolysable Schiff-base-type cross-links and stable non-hydrolysable cross-links. Postpolymerization hydrolysis caused cleavage of the azomethine groups and release of phenylenediamine or diformylbenzene template segments from the Schiff-base-type cross-links. Although hydrolysis resulted in partial de-cross-linking, stable cross-links remaining in the networks prevented the collapse of the porous texture. Partial de-cross-linking led to an increase in the micropore diameter and, moreover, –HC=O or –NH2 groups were introduced into the networks in this way. Modified networks decorated with above groups acted as chemisorbents for trapping aldehydes or primary amines under formation of azomethine links between the network and adsorptive. Workplace Institute of Macromolecular Chemistry Contact Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Year of Publishing 2021 Electronic address https://www.sciencedirect.com/science/article/pii/S0014305720316281?via%3Dihub
Number of the records: 1