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Hyper-cross-linked polyacetylene-type microporous networks decorated with terminal ethynyl groups as heterogeneous acid catalysts for acetalization and esterification reactions

Identifikátory výsledku

  • Kód výsledku v IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F18%3A00494080" target="_blank" >RIV/61389013:_____/18:00494080 - isvavai.cz</a>

  • Výsledek na webu

    <a href="http://dx.doi.org/10.1002/chem.201802432" target="_blank" >http://dx.doi.org/10.1002/chem.201802432</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1002/chem.201802432" target="_blank" >10.1002/chem.201802432</a>

Alternativní jazyky

  • Jazyk výsledku

    angličtina

  • Název v původním jazyce

    Hyper-cross-linked polyacetylene-type microporous networks decorated with terminal ethynyl groups as heterogeneous acid catalysts for acetalization and esterification reactions

  • Popis výsledku v původním jazyce

    Heterogeneous catalysts based on materials with permanent porosity are of great interest owing to their high specific surface area, easy separation, recovery, and recycling ability. Additionally, porous polymer catalysts (PPCs) allow us to tune catalytic activity by introducing various functional centres. This study reports the preparation of PPCs with a permanent micro/mesoporous texture and a specific surface area SBET of up to 1000 m2 g−1 active in acid‐catalyzed reactions, namely aldehyde and ketone acetalization and carboxylic acid esterification. These PPC‐type conjugated hyper‐cross‐linked polyarylacetylene networks were prepared by chain‐growth homopolymerization of 1,4‐diethynylbenzene, 1,3,5‐triethynylbenzene and tetrakis(4‐ethynylphenyl)methane. However, only some ethynyl groups of the monomers (from 58 to 80 %) were polymerized into the polyacetylene network segments while the other ethynyl groups remained unreacted. Depending on the number of ethynyl groups per monomer molecule and the covalent structure of the monomer, PPCs were decorated with unreacted ethynyl groups from 3.2 to 6.7 mmol g−1. The hydrogen atoms of the unreacted ethynyl groups served as acid catalytic centres of the aforementioned organic reactions. To the best of our knowledge, this is first study describing the high activity of hydrogen atoms of ethynyl groups in acid‐catalyzed reactions.

  • Název v anglickém jazyce

    Hyper-cross-linked polyacetylene-type microporous networks decorated with terminal ethynyl groups as heterogeneous acid catalysts for acetalization and esterification reactions

  • Popis výsledku anglicky

    Heterogeneous catalysts based on materials with permanent porosity are of great interest owing to their high specific surface area, easy separation, recovery, and recycling ability. Additionally, porous polymer catalysts (PPCs) allow us to tune catalytic activity by introducing various functional centres. This study reports the preparation of PPCs with a permanent micro/mesoporous texture and a specific surface area SBET of up to 1000 m2 g−1 active in acid‐catalyzed reactions, namely aldehyde and ketone acetalization and carboxylic acid esterification. These PPC‐type conjugated hyper‐cross‐linked polyarylacetylene networks were prepared by chain‐growth homopolymerization of 1,4‐diethynylbenzene, 1,3,5‐triethynylbenzene and tetrakis(4‐ethynylphenyl)methane. However, only some ethynyl groups of the monomers (from 58 to 80 %) were polymerized into the polyacetylene network segments while the other ethynyl groups remained unreacted. Depending on the number of ethynyl groups per monomer molecule and the covalent structure of the monomer, PPCs were decorated with unreacted ethynyl groups from 3.2 to 6.7 mmol g−1. The hydrogen atoms of the unreacted ethynyl groups served as acid catalytic centres of the aforementioned organic reactions. To the best of our knowledge, this is first study describing the high activity of hydrogen atoms of ethynyl groups in acid‐catalyzed reactions.

Klasifikace

  • Druh

    J<sub>imp</sub> - Článek v periodiku v databázi Web of Science

  • CEP obor

  • OECD FORD obor

    10404 - Polymer science

Návaznosti výsledku

  • Projekt

  • Návaznosti

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Ostatní

  • Rok uplatnění

    2018

  • Kód důvěrnosti údajů

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

Údaje specifické pro druh výsledku

  • Název periodika

    Chemistry A European Journal

  • ISSN

    1521-3765

  • e-ISSN

  • Svazek periodika

    24

  • Číslo periodika v rámci svazku

    55

  • Stát vydavatele periodika

    DE - Spolková republika Německo

  • Počet stran výsledku

    8

  • Strana od-do

    14742-14749

  • Kód UT WoS článku

    000446067800024

  • EID výsledku v databázi Scopus

    2-s2.0-85053482333