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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 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Microporous hyper-cross-linked polyacetylene networks: covalent structure and texture modification by reversible Schiff-base chemistry Tvůrce(i) 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)Číslo článku 109914 Zdroj.dok. European Polymer Journal. - : Elsevier - ISSN 0014-3057
Roč. 136, 5 August (2020), s. 1-14Poč.str. 14 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova hyper-cross-linked network ; microporous material ; polyacetylene Vědní obor RIV CD - Makromolekulární chemie Obor OECD Polymer science CEP GA20-01233S GA ČR - Grantová agentura ČR Způsob publikování Omezený přístup Institucionální podpora UMCH-V - RVO:61389013 UT WOS 000562571200013 EID SCOPUS 85088994756 DOI 10.1016/j.eurpolymj.2020.109914 Anotace 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. Pracoviště Ústav makromolekulární chemie Kontakt Eva Čechová, cechova@imc.cas.cz ; Tel.: 296 809 358 Rok sběru 2021 Elektronická adresa https://www.sciencedirect.com/science/article/pii/S0014305720316281?via%3Dihub
Počet záznamů: 1