Ionic liquids-assisted preparation

Ionic Liquids-Assisted Preparation of Polymer Carbon Nanotube Composites... 

Yoo, K Choi, H. Dionysiou, D. D. (2004). Ionic liquid assisted preparation of nanostructmed TiCb p>artides Chem. Commun.V , 2000-2001,1359-7345... 

An ionic liquid-assisted solvothermal method is employed to prepare singlephase, oxygen-free, hexagonal NaGdF4 Eu nanorods with a visible quantum efficiency of 187 %, where l-ethyl-3-methylimidazolium bromide (CiinimBr) was used as template (Fig. 9.45). Most importantly, the presence of the ionic liquid additive is mandatory as only in that case phase pure hexagonal material is obtained that shows the exceptionally high quantum yields [64]. 

The a-Fe20s with various morphologies has been synthesized via an ionic liquid assisted hydrothermal synthetic method by Lian and coworkers (Lian et al. 2009) The results indicate that the as-prepared samples are a-Fe2Q3 nanoparticles, mesoporous hollow microspheres. 

Theoretical and applied aspects of microwave heating, as well as the advantages of its application are discussed for the individual analytical processes and also for the sample preparation procedures. Special attention is paid to the various preconcentration techniques, in part, sorption and extraction. Improvement of microwave-assisted solution preconcentration is shown on the example of separation of noble metals from matrix components by complexing sorbents. Advantages of microwave-assisted extraction and principles of choice of appropriate solvent are considered for the extraction of organic contaminants from solutions and solid samples by alcohols and room-temperature ionic liquids (RTILs). 

It is hoped that this section will give the reader a better appreciation of the range of ionic liquids that have already been prepared, as well as a summary of the main techniques involved and the potential pitfalls. While the basic chemistry involved is relatively straightforward, the preparation of ionic liquids of known purity may be less easily achieved, and it is hoped that the ideas given here may be of assistance to the reader. It should also be noted that many of the more widely used ionic liquids are now commercially available from a range of suppliers, including some specializing in the synthesis of ionic liquids [53]. 

Esmaili, M. and Habibi-Yangjeh, A. (2010) Microwave-assisted preparation and characterization of Zri, %Cd S nanoparticles in presence of an ionic liquid and their photocatalytic activities. Journal of Alloys and Compounds, 496 (1-2), 650-655. 

Ionic liquids have been a popular topic of interest in 2002 and a review of the applications of these solvents in organic synthesis has been published (02ACA75>. New, densely functionalized fluoroalkyl-substituted imidazolium ionic liquids have been reported <02TL9497>. An ultrasound-assisted preparation of a series of ambient-temperature ionic liquids, l-alkyl-3-methylimidazolium halides, which proceeds via efficient reactions of 1-methyl imidazole with alkyl halides/terminal dihalides under solvent-free conditions, has been described <02OL3161>. New hydrophilic poly(ethyleneglycol)-ionic liquids have been synthesized from... 

The ionic liquid l-n-butyl-3-methylimidazolium tetrafluorob-orate has been used to synthesize nanoneedlcs and nanorods of manganese dioxide (MnO,).192 Crystalline silica nanowires were prepared by Deepalc et al.m by a carbothermal procedure. Crystalline SiO, nanowires have also been prepared by a low-temperature iron assisted hydrothermal procedure.1,5... 

Certain quaternary salts of imidazoles have become important as ionic liquids, in particular salts of l-butyl-3-methylimidazolium (bmim). Preparation of imidazolium-containing ionic liquids, in the desired product ionic liquid as a solvent, is a virtually solvent-free, one-pot process proceeding in good to excellent yields <2003S2626>. There are also microwave-assisted, solvent-free processes for the preparation of imidazolium-based ionic liquids <2001CC643, 2003GC181>. 

Patent Preparation and Use of Ionic Liquids in Microwave-Assisted... 

---