Microporous hyper-cross-linked polyacetylene networks: covalent structure and texture modification by reversible Schiff-base chemistry

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F20%3A00532071" target="_blank" >RIV/61389013:_____/20:00532071 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/20:10419845

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0014305720316281?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0014305720316281?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.eurpolymj.2020.109914" target="_blank" >10.1016/j.eurpolymj.2020.109914</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Microporous hyper-cross-linked polyacetylene networks: covalent structure and texture modification by reversible Schiff-base chemistry

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Microporous hyper-cross-linked polyacetylene networks: covalent structure and texture modification by reversible Schiff-base chemistry

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10404 - Polymer science

Projekt

<a href="/cs/project/GA20-01233S" target="_blank" >GA20-01233S: Racionální design pokročilých měkkých funkčních materiálů řízený pokročilou NMR spektroskopií pevného stavu a vysoce výkonnou elektronovou mikroskopií</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

European Polymer Journal

ISSN

0014-3057

e-ISSN

—

Svazek periodika

136

Číslo periodika v rámci svazku

5 August

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

14

Strana od-do

1-14

Kód UT WoS článku

000562571200013

EID výsledku v databázi Scopus

2-s2.0-85088994756