Use of ionic liquids in sol-gel; ionogels and applications

Vioux, André; Viau, Lydie; Volland, Sabrina; Bideau, Jean Le

doi:10.1016/j.crci.2009.07.002

Cited by 192 publications

(169 citation statements)

References 110 publications

(127 reference statements)

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“…The first ionogel (for gel synthesized with an IL) was obtained in 2000 by Dai et al (2000). Several investigations led to a variety of materials (Vioux et al, 2010;Karout et al, 2007;Klingshirn et al, 2005) implying numerous characterizations: porous volume, fractal dimension, conductivity of the ionogel bulk measured with two plate electrodes (Gupta et al, 2012;Neouze et al, 2006;Karout et al, 2009aKarout et al, , 2009bZhang et al, 2010;Zhou et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Textural, Structural and Electrical Characterizations of EMIMAc Silica Ionogels and Their Corresponding Aerogels

Bengourna¹,

Despetis²,

Bonnet³

et al. 2014

APR

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Silica ionogels were synthesized from tetramethoxysilane (T MOS ),methyltrimethoxysilane (MT MS ) and 1-ethyl-2-methylimidazolium Acetate (EMI MAc: Ionic Liquid) in different proportions .The textural characterizations showed an effect of these concentrations on the corresponding aerogels: pore size distributions and effective surfaces. The structure of the aerogels was measured with a SAXS (Small-Angle XRay Scattering) apparatus and was typical of acid catalyzed aerogels. Conductivity voltage measurements, operated on the ionogels, were carried out using an electrical 4 wire-electrodes set up. The electrical voltage temporal response of the EMIMAc silica ionogel was modelled by a RLC series circuit which characteristics depended on the synthesis.

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Section: Introductionmentioning

confidence: 99%

Textural, Structural and Electrical Characterizations of EMIMAc Silica Ionogels and Their Corresponding Aerogels

Bengourna¹,

Despetis²,

Bonnet³

et al. 2014

APR

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“…So far, two routes have been highlighted for the incorporation of ILs in a gel; the organic route, which involves in situ polymerization or swelling of polymers with ILs [9,10], and the inorganic route, which consists of impregnation of ILs within oxide backbones [11]. Of the inorganic routes, the polymeric sol-gel process is probably the most popular synthetic route, as recently summarized in an excellent review [2]. It involves hydrolysis and condensation reactions of inorganic or hybrid precursors in order to develop inorganic backbones with morphologies ranging from macroporous materials to dense bulk materials depending on the hydrolysis conditions and the nature of the precursors employed.…”

Section: Introductionmentioning

confidence: 99%

“…They are a new type of hybrid material which consist of an ionic liquid (IL) confined within the backbone of a gel-like structure [1,2,3]. ILs can be generally described as organic salts combining many favourable physicochemical properties including low melting points (typically <370 K), negligible vapour pressure, high ionic conductivities and thermal stability [4,5].…”

Section: Introductionmentioning

confidence: 99%

Graphene-doped photo-patternable ionogels: tuning of conductivity and mechanical stability of 3D microstructures

et al. 2012

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This work reports for the first time the development of enhanced conductivity, graphenedoped photo-patternable hybrid organic-inorganic ionogels and the effect of the subsequent materials condensation on the conductivity and mechanical stability of threedimensional microstructures fabricated by multi-photon polymerisation (MPP). Ionogels were based on photocurable silicon/zirconium hybrid sol-gel materials and phosphonium (trihexyltetradecylphosphonium dicyanamide [P6,6,6,14][DCA] ionic liquid (IL). To optimise the dispersion of graphene within the ionogel matrices, aqueous solutions of graphene were prepared, as opposed to the conventional graphene powder approach, and employed as catalysts of hydrolysis and condensation reactions occurring in the sol-gel process.Ionogels were prepared via a two step process by varying the hydrolysis degree from 25 to 50%, IL content between 0-50 w/w%, and the inorganic modifier (zirconate complex) concentration from 30 to 60 mol.% against the photocurable ormosil and they were characterised via Raman, Electrochemical Impedance Spectroscopy and Transmission Electron Microscopy. MPP was performed on the hybrid ionogels, resulting in threedimensional microstructures that were characterised using scanning electron microscopy.It is clearly demonstrated that the molecular formulation of the ionogels, including the concentration of graphene and the zirconate network modifier, play a critical role in the conductivity of the ionogels and influence the resulting mechanical stability of the fabricated three-dimensional microstructures. This work aims to establish for the first time the relationship between the molecular design and condensation of materials in the physico-chemistry and dynamic of ionogels.3

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“…Despite the achieved progress and the wealth of the literature on the considered topic, a comprehensive review highlighting the various roles of ILs in optical chemical sensors and evaluation of their potential to yield the novel materials for chemical analysis is still needed. To our knowledge, the previous reviews either cover briefly such optical sensors 25,[40][41][42] or focus on the classification and methods of the preparation of the IL-based materials. 25,28,43 Warner et al 44 reported the IL functions while producing photonic IL sensors.…”

Section: Introductionmentioning

confidence: 99%

Applications of Ionic Liquids for the Development of Optical Chemical Sensors and Biosensors

et al. 2017

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This paper reviews the primary literature reporting the use of ionic liquids (ILs) in optical sensing technologies. The optical chemical sensors that have been developed with the assistance of ILs are classified according to the type of resultant material. Key aspects of applying ILs in such sensors are revealed and discussed. They include using ILs as solvents for the synthesis of sensor matrix materials; additives in polymer matrices; matrix materials; modifiers of the surfaces; and multifunctional sensor components. The operational principles, design, texture, and analytical characteristics of the offered sensors for determining CO2, O2, metal ions, CN -, and various organic compounds are critically discussed. The key advantages and disadvantages of using ILs in optical sensing technologies are defined. Finally, the applicability of the described materials for chemical analysis is evaluated, and possibilities for their further modernization are outlined.

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Use of ionic liquids in sol-gel; ionogels and applications

Cited by 192 publications

References 110 publications

Textural, Structural and Electrical Characterizations of EMIMAc Silica Ionogels and Their Corresponding Aerogels

Textural, Structural and Electrical Characterizations of EMIMAc Silica Ionogels and Their Corresponding Aerogels

Graphene-doped photo-patternable ionogels: tuning of conductivity and mechanical stability of 3D microstructures

Applications of Ionic Liquids for the Development of Optical Chemical Sensors and Biosensors

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