Microporous polymers prepared from non-porous hyper-cross-linked networks by removing covalently attached template molecules

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F22%3A00550078" target="_blank" >RIV/61389013:_____/22:00550078 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11310/22:10448196

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S1387181121007629?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S1387181121007629?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.micromeso.2021.111636" target="_blank" >10.1016/j.micromeso.2021.111636</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Microporous polymers prepared from non-porous hyper-cross-linked networks by removing covalently attached template molecules

Popis výsledku v původním jazyce

A new method for the formation of permanent micropores in hyper-cross-linked networks is reported. This method is based on a template approach, using small molecules (4-methylaniline and 4-methylbenzaldehyde) as templates. These molecules are covalently attached via azomethine links to parent non-porous hyper-cross-linked polyacetylene networks prepared by chain-growth homo and copolymerization of ethynylated monomers. Highly efficient and well-defined postpolymerization hydrolysis of the networks leads to (i) cleavage of azomethine links and (ii) removal of the template molecules from the networks. Although up to 40 wt % of the mass of the networks are removed via hydrolysis, the hyper-cross-linked scaffold of the networks is not collapsed and micropores are formed in the networks. In this way, the parent non-porous networks are transformed into networks with permanent micropores (diameter ∼1 nm) and a specific surface area up to 623 m2/g−1. Simultaneously with the formation of micropores, functional groups (NH2, CHO) are introduced into the networks. The prepared microporous networks adsorb the model adsorptives (up to 1.73 mmol CO2/g and up to 6.53 mmol I2/g.). The detemplating and micropores formation is confirmed by solid state NMR spectra and N2 adsorption/desorption isotherms. The reported method of micropores formation could find a wider application for the preparation of microporous polymers with a well-defined texture and surface functionalization. Not only azomethine links but also many other groups with cleavable bonds could potentially be used for templating with covalently attached small molecules.

Název v anglickém jazyce

Microporous polymers prepared from non-porous hyper-cross-linked networks by removing covalently attached template molecules

Popis výsledku anglicky

A new method for the formation of permanent micropores in hyper-cross-linked networks is reported. This method is based on a template approach, using small molecules (4-methylaniline and 4-methylbenzaldehyde) as templates. These molecules are covalently attached via azomethine links to parent non-porous hyper-cross-linked polyacetylene networks prepared by chain-growth homo and copolymerization of ethynylated monomers. Highly efficient and well-defined postpolymerization hydrolysis of the networks leads to (i) cleavage of azomethine links and (ii) removal of the template molecules from the networks. Although up to 40 wt % of the mass of the networks are removed via hydrolysis, the hyper-cross-linked scaffold of the networks is not collapsed and micropores are formed in the networks. In this way, the parent non-porous networks are transformed into networks with permanent micropores (diameter ∼1 nm) and a specific surface area up to 623 m2/g−1. Simultaneously with the formation of micropores, functional groups (NH2, CHO) are introduced into the networks. The prepared microporous networks adsorb the model adsorptives (up to 1.73 mmol CO2/g and up to 6.53 mmol I2/g.). The detemplating and micropores formation is confirmed by solid state NMR spectra and N2 adsorption/desorption isotherms. The reported method of micropores formation could find a wider application for the preparation of microporous polymers with a well-defined texture and surface functionalization. Not only azomethine links but also many other groups with cleavable bonds could potentially be used for templating with covalently attached small molecules.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10404 - Polymer science

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Microporous and Mesoporous Materials

ISSN

1387-1811

e-ISSN

1873-3093

Svazek periodika

330

Číslo periodika v rámci svazku

January

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

111636

Kód UT WoS článku

000761815600002

EID výsledku v databázi Scopus

2-s2.0-85121246699