Publication detail

Organoclays with carbosilane dendrimers containing ammonium or phosphonium groups

Monika Müllerová, Stanislav Šabata, Jindřich Matoušek, Martin Kormunda, Jana Holubová, Radka Bálková, Roman Petričkovič, Martin Koštejn, Jaroslav Kupčík, Radek Fajgara, Tomáš Strašák

Original Title

Organoclays with carbosilane dendrimers containing ammonium or phosphonium groups

English Title

Organoclays with carbosilane dendrimers containing ammonium or phosphonium groups

Type

journal article

Language

en

Original Abstract

New composite materials could reveal attractive capabilities and favourable properties. Herein, we present novel layered nanocomposites consisting of inorganic clay (montmorillonite) and cationic carbosilane dendrimers. A comparative study was performed to evaluate cationic moieties (ammonium or phosphonium) and various generations of dendrimers (first, second and third) and their influence on the characteristics of resulting materials. The target nanocomposites were characterized by XRD, TEM, TGA, IR and MAS NMR. Interestingly, with multivalent dendritic cations, as opposed to monovalent cations, we detected a new connection of cationic species to the inorganic matrix by both ammonium and phosphonium dendrimers. To evaluate the mechanism of thermal degradation of the prepared materials, non-oxidative pyrolysis coupled with analysis of the resulting products by IR and MS was performed. To illustrate the catalytic activity of the as-prepared materials, selected samples were tested as catalysts in the cycloaddition of CO2 with epoxide (allyl glycidyl ether). © 2018 The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.

English abstract

New composite materials could reveal attractive capabilities and favourable properties. Herein, we present novel layered nanocomposites consisting of inorganic clay (montmorillonite) and cationic carbosilane dendrimers. A comparative study was performed to evaluate cationic moieties (ammonium or phosphonium) and various generations of dendrimers (first, second and third) and their influence on the characteristics of resulting materials. The target nanocomposites were characterized by XRD, TEM, TGA, IR and MAS NMR. Interestingly, with multivalent dendritic cations, as opposed to monovalent cations, we detected a new connection of cationic species to the inorganic matrix by both ammonium and phosphonium dendrimers. To evaluate the mechanism of thermal degradation of the prepared materials, non-oxidative pyrolysis coupled with analysis of the resulting products by IR and MS was performed. To illustrate the catalytic activity of the as-prepared materials, selected samples were tested as catalysts in the cycloaddition of CO2 with epoxide (allyl glycidyl ether). © 2018 The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.

Keywords

ammonia, carbon dioxide, carbosilane cation dendrimer epoxide, monovalent cation, montmorillonite, nanocomposite, phosphonium derivative, silane derivative unclassified drug

Released

04.12.2017

Publisher

Royal Society of Chemistry

Pages from

1187

Pages to

1196

Pages count

10