Synthesis and properties of tetra-alkyl-dimethylguanidinium salts as a potential new generation of ionic liquids

Mateus, Nuno; Branco, Luı́s C.; Lourenço, Nuno M. T.; Afonso, Carlos A. M.

doi:10.1039/b303408a

Cited by 144 publications

(88 citation statements)

References 35 publications

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“…Compared with GPPO AAEMs, the QA-AAEMs lost 20 -40% of their functional groups under similar conditions [33,34]. The excellent alkali stability of GPPO AAEMs may derive from the presence of the π electron conjugated system of the pendant guanidinium groups (shown in scheme 2), which allows the positive charge to be delocalized over one carbon and three nitrogen atoms; this clearly leads to the good thermal and alkali stabilities observed [17,29,35]. …”

Section: Ionic Conductivitymentioning

confidence: 99%

Alkali resistant and conductive guanidinium-based anion-exchange membranes for alkaline polymer electrolyte fuel cells

Lin

Liu

et al. 2012

Journal of Power Sources

157

100

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Section: Ionic Conductivitymentioning

confidence: 99%

Alkali resistant and conductive guanidinium-based anion-exchange membranes for alkaline polymer electrolyte fuel cells

Lin

Liu

et al. 2012

Journal of Power Sources

157

100

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“…The ever-increasing importance of efforts in green chemistry has also driven the development of IL-based DLLME procedures. IL solvents possess high thermal stabilities (over 300ᵒC in some cases) and negligible vapor pressures at ambient temperatures, providing an environmentally benign alternative to their conventional organic solvent counterparts that are often considered highly toxic [48,[51][52][53] IL solvents can be applied across a broad range of DLLME modes including classical DLLME, temperature-controlled DLLME, microwave-, ultrasound-, or vortex-assisted DLLME as well as in situ DLLME [54]. Here, we examine the application of ILs in a variety of DLLME methods with an emphasis on studies published within the last two years.…”

Section: Ionic Liquids In Dispersive Liquid-liquid Microextractionmentioning

confidence: 99%

Ionic liquids: solvents and sorbents in sample preparation

Clark

Emaus

Varona

et al. 2017

J of Separation Science

140

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The applications of ionic liquids (ILs) and IL-derived sorbents are rapidly expanding. By careful selection of the cation and anion components, the physicochemical properties of ILs can be altered to meet the requirements of specific applications. Reports of IL solvents possessing high selectivity for specific analytes are numerous and continue to motivate the development of new IL-based sample preparation methods that are faster, more selective, and environmentally benign compared to conventional organic solvents. The advantages of ILs have also been exploited in solid/polymer formats in which ordinarily nonspecific sorbents are functionalized with IL moieties in order to impart selectivity for an analyte or analyte class. Furthermore, new ILs that incorporate a paramagnetic component into the IL structure, known as magnetic ionic liquids (MILs), have emerged as useful solvents for bioanalytical applications. In this rapidly changing field, this Review focuses on the applications of ILs and IL-based sorbents in sample preparation with a special emphasis on liquid phase extraction techniques using ILs and MILs, IL-based solid-phase extraction, ILs in mass spectrometry, and biological applications. K E Y W O R D Salternative solvents, ionic liquids, magnetic ionic liquids, microextraction, sample preparation

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“…Rieger and coworkers modified GBH by introducing a methyl group. As the methyl group lowers the cation's symmetry and, consequently, lowers the melting point, (Mateus et al, 2003) this salt is an IL, i.e. liquid below 100 °C.…”

Section: Ils As Hydrogen Storage Materialsmentioning

confidence: 99%