New Developments in Material Preparation Using a Combination of Ionic Liquids and Microwave Irradiation

Abstract

During recent years, synthetic methods combining microwaves and ionic liquids became accepted as a promising methodology for various materials preparations because of their high efficiency and low energy consumption. Ionic liquids with high polarity are heated rapidly, volumetrically and simultaneously under microwave irradiation. Hence, combination of microwave irradiation as a heating source with ionic liquids with various roles (e.g., solvent, additive, template or reactant) opened a completely new technique in the last twenty years for nanomaterials and polymers preparation for applications in various materials science fields including polymer science. This review summarizes recent developments of some common materials syntheses using microwave-assisted ionic liquid method with a focus on inorganic nanomaterials, polymers, carbon-derived composites and biomass-based composites. After that, the mechanisms involved in microwave-assisted ionic-liquid (MAIL) are discussed briefly. This review also highlights the role of ionic liquids in the reaction and crucial issues that should be addressed in future research involving this synthesis technique.

Il-based advanced techniques for the extraction of value-added compounds from natural sources and food by-products

“…The unique properties of ILs have been also explored for their use as solvents, microwave absorbers, reactants, additives or templates combined with microwave irradiation (as heating source) in the organic synthesis of different heterocyclic compounds and the preparation of inorganic nanomaterials, polymers, biomass-based composites and carbon-derived composites [14,15]. Furthermore, the application of ILs to replace conventional liquid or solid matrices in matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS) or to develop optical sensors has been also reported [16].…”

“…The modification of the anion structure has influence in properties like thermal stability and miscibility, while the length of the alkyl chain in the cation and/or its shape or symmetry may modify the viscosity, surface tension and density [24]. A new generation of ILs named deep eutectic solvents (DESs) based on more stable and hydrophobic anions such as [(CF 3 SO 2 ) 2 N − ], amino or organic acids, sugars, alkylphosphates or alkylsulfates and cations such as choline have attracted considerable attention in recent years [15]. Due to their ionic character, high solvation ability for organic, inorganic and organometallic compounds, improved selectivity and the synthesis of air-and waterstable ILs, the use of ILs in analytical chemistry for the extraction of value-added compounds from natural sources in combination with advanced techniques (mainly MAE, UAE and SWE) has significantly increased.…”

Crystal structure of dichlorido-bis(1-hexyl-1H-benzotriazole-k1 N)zinc(II), C24H34N6Cl2Zn

“…Ionic liquids have shown good application prospects in organic synthesis [4], organic catalysis [5], solar cell preparation [6], electrochemistry [7], analytical chemistry [8], preparation of functional materials [9] and so on. More and more attention has been paid to the application of n-dialkylbenzimidazolium ionic liquids in catalytic systems.…”

Synthesis of luminescent semiconductor nanoparticles in ionic liquids –the importance of the ionic liquid in the formation of quantum dots

“…ILs are high-suitable media for absorbing microwaves as they are constituted off large ions with high polarizability and conductivity (40,41). Upon irradiation with microwaves, extremely high heating rates are achieved which lead to a high formation rate of nuclei, which, in turn, which favors nanoparticle formation.…”