Interface induced growth and transformation of polymer-conjugated proto-crystalline phases in aluminosilicate hybrids: a multiple-quantum 23Na-23Na MAS NMR correlation spectroscopy study

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F16%3A00458292" target="_blank" >RIV/61389013:_____/16:00458292 - isvavai.cz</a>

Alternative codes found

RIV/61388955:_____/16:00458292

Result on the web

<a href="http://dx.doi.org/10.1021/acs.langmuir.5b04736" target="_blank" >http://dx.doi.org/10.1021/acs.langmuir.5b04736</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1021/acs.langmuir.5b04736" target="_blank" >10.1021/acs.langmuir.5b04736</a>

Result language

angličtina

Original language name

Interface induced growth and transformation of polymer-conjugated proto-crystalline phases in aluminosilicate hybrids: a multiple-quantum 23Na-23Na MAS NMR correlation spectroscopy study

Original language description

Nanostructured materials typically offer enhanced physicochemical properties because of their large interfacial area. In this contribution, we present a comprehensive structural characterization of aluminosilicate hybrids with polymer-conjugated nanosized zeolites specifically grown at the organic–inorganic interface. The inorganic amorphous Al–O–Si framework is formed by alkali-activated low-temperature transformation of metakaoline, whereas simultaneous copolymerization of organic comonomers creates a secondary epoxide network covalently bound to the aluminosilicate matrix. This secondary epoxide phase not only enhances the mechanical integrity of the resulting hybrids but also introduces additional binding sites accessible for compensating negative charge on the aluminosilicate framework. This way, the polymer network initiates growth and subsequent transformation of protocrystalline short-range ordered zeolite domains that are located at the organic–inorganic interface. By applying an experimental approach based on 2D 23Na–23Na double-quantum (DQ) MAS NMR spectroscopy, we discovered multiple sodium binding sites in these protocrystalline domains, in which immobilized Na+ ions form pairs or small clusters. It is further demonstrated that these sites, the local geometry of which allows for the pairing of sodium ions, are preferentially occupied by Pb2+ ions during the ion exchange. The proposed synthesis protocol thus allows for the preparation of a novel type of geopolymer hybrids with polymer-conjugated zeolite phases suitable for capturing and storage of metal cations. The demonstrated 23Na–23Na DQ MAS NMR combined with DFT calculations represents a suitable approach for understanding the role of Na+ ions in aluminositicate solids and related inorganic–organic hybrids, particularly their specific arrangement and clustering at interfacial areas.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CD - Macromolecular chemistry

OECD FORD branch

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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

2016

Confidentiality

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

Name of the periodical

Langmuir

ISSN

0743-7463

e-ISSN

—

Volume of the periodical

32

Issue of the periodical within the volume

11

Country of publishing house

US - UNITED STATES

Number of pages

11

Pages from-to

2787-2797

UT code for WoS article

000372856800030

EID of the result in the Scopus database

2-s2.0-84962167818