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

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>

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10404 - Polymer science

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2018

Kód důvěrnosti údajů

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

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