Dendritic Ionic Liquids Based on Imidazolium‐Modified Poly(aryl ether) Dendrimers

Abstract

A series of dendritic ionic liquids (DILs) based on imidazolium-modified poly(aryl ether) dendrimers IL-Br-Gn (n=0-3) were synthesized by a modified convergent approach and "click" chemistry. The resulting DILs exhibited high thermal resistance with decomposition temperatures up to 270 °C and low glass transition temperatures in the range of approximately -5-0 °C. All IL-Br-Gn were found to be miscible with water at any ratio and could encapsulate hydrophobic molecules. The reversible phase transfer of the DILs between the aqueous and organic phases was accomplished by simple anion exchange between the hydrophilic Br(-) anion and the hydrophobic bis(trifluoromethylsulfonyl)amide anion (NTf2(-)). IL-Br-Gn could be used as transporters to shuttle hydrophobic molecules between the organic and aqueous phases efficiently. The present work provides a new kind of transporting materials with potential applications in substance separation, drug delivery, and biomolecule transport.

Dendritic fibrous nanosilica-supported dendritic IL/Ru(ii) as photocatalysts for the dicarbofunctionalization of styrenes with carbon dioxide and amines

“…Dendritic ILs (DILs), with a combination of dendrimer and IL characteristics, have been broadly utilized in catalysis, as transporters, and in the adsorption of heavy metal cations. 69,70 This study reports the production of DFNS-supported dendritic IL/Ru(II) catalysts DFNS/IL/Ru (1), DFNS/IL/Ru (2), and DFNS/IL/Ru (3) with high ionic density and various generations. Results show that the dendritic IL/Ru catalysts DFNS/IL/ Ru (1), DFNS/IL/Ru (2), and DFNS/IL/Ru (3) positively inuence the efficiency of the a-aminomethylcarboxylation of alkenes with amines and CO 2 .…”

“…Dendritic ILs (DILs), with a combination of dendrimer and IL characteristics, have been broadly utilized in catalysis, as transporters, and in the adsorption of heavy metal cations. 69,70 …”

Multivalent Bifunctional Carbosilane Dendrimer-Supported Ammonium and Phosphonium Organocatalysts for the Coupling of CO2 and Epoxides

“…Dendrimers with their regular well-defined shape and a wide structural variability are ideal organic components for accurately designed organic–inorganic hybrid materials. − However, unlike ILs supported on polymers, to the best of our knowledge, the dendritic (dendrimeric) ionic liquids (DILs) have not been used as catalysts for CO 2 insertion yet, except our initial studies on organoclay-encapsulated version of these species discussed below . Monovalent catalytic units can be attached either to the dendrimer periphery or to its interior, thus providing multivalent homogeneous catalysts with a well-controlled microenvironment of catalytic sites and excellent solubility.…”

“…Monovalent catalytic units can be attached either to the dendrimer periphery or to its interior, thus providing multivalent homogeneous catalysts with a well-controlled microenvironment of catalytic sites and excellent solubility. Moreover, such dendritic catalysts are separable from the reaction mixture by techniques utilizing their large hydrodynamic volume. − An in-depth study from van Koten et al demonstrated the potential of metallodendritic wedges for the assessment of (nano)­porous material permeability at ambient pressure . Although the dendritic catalysts were separated from the reaction mixture, no subsequent catalytic cycles were performed.…”

Photopolymerization of Ionic Liquids – A Mutually Beneficial Approach for Materials Fabrication

“…A variety of polyelectrolytes or "poly-ionic liquids" (PILs) have been synthesized from IL precursors and used as ion conductors, [19][20][21][22] binders, [23][24][25][26] metal stabilizers, [27,28] among others. [29] Their preparation is typical of other free-radical polymerizations and can be controlled to create block-copolymers, [30,31] dendrimers/branched poly-mers, [32,33] and others. In these cases, ILs are treated simply like any other polymerizable monomer; they are dissolved in a solvent, polymerized, and then purified.…”