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

Result code in 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>

Alternative codes found

RIV/00216208:11310/22:10448196

Result on the web

<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>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10404 - Polymer science

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2022

Confidentiality

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

Name of the periodical

Microporous and Mesoporous Materials

ISSN

1387-1811

e-ISSN

1873-3093

Volume of the periodical

330

Issue of the periodical within the volume

January

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

8

Pages from-to

111636

UT code for WoS article

000761815600002

EID of the result in the Scopus database

2-s2.0-85121246699