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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 ASEP0532071
    Document TypeJ - Journal Article
    R&D Document TypeJournal Article
    Subsidiary JČlánek ve WOS
    TitleMicroporous 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 number109914
    Source TitleEuropean Polymer Journal. - : Elsevier - ISSN 0014-3057
    Roč. 136, 5 August (2020), s. 1-14
    Number of pages14 s.
    Languageeng - English
    CountryGB - United Kingdom
    Keywordshyper-cross-linked network ; microporous material ; polyacetylene
    Subject RIVCD - Macromolecular Chemistry
    OECD categoryPolymer science
    R&D ProjectsGA20-01233S GA ČR - Czech Science Foundation (CSF)
    Method of publishingLimited access
    Institutional supportUMCH-V - RVO:61389013
    UT WOS000562571200013
    EID SCOPUS85088994756
    DOI10.1016/j.eurpolymj.2020.109914
    AnnotationWe 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.
    WorkplaceInstitute of Macromolecular Chemistry
    ContactEva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358
    Year of Publishing2021
    Electronic addresshttps://www.sciencedirect.com/science/article/pii/S0014305720316281?via%3Dihub
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