Confinement of 1-Butyl-3-methylimidazolium Nitrate in Metallic Silver

Néouze, Marie-Alexandra; Litschauer, Marco

doi:10.1021/jp8079606

Cited by 53 publications

(68 citation statements)

References 28 publications

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“…9,32,45 This self-arrangement tendency was also highlighted by luminescence experiments in the case of silica-confined imidazolium ionic liquids. 7,46 The authors pointed out two main features of the emission spectra of confined imidazolium, which were also observed in our ISNN hybrid materials based on covalently bonded imidazolium units.…”

Section: Resultsmentioning

confidence: 73%

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Photoluminescence as Complementary Evidence for Short-Range Order in Ionic Silica Nanoparticle Networks

et al. 2010

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Recently we published the synthesis of new hybrid materials, ionic silica nanoparticles networks (ISNN), made of silica nanoparticles covalently connected by organic bridging ligands containing imidazolium units owing to a “click-chemistry-like” reaction. Among other techniques small-angle X-ray scattering (SAXS) experiments were carried out to get a better picture of the network extension. It turned out that the short-range order in ISNN materials was strongly influenced by the rigidity of the bridging ligand, while the position of the short-range order peaks confirmed the successful linking of the bridging ligands. The photoluminescence experiments reported in this communication revealed strongly enhanced emission in the hybrid material in comparison with neat imidazolium salts. Moreover the shift of the emission maximum toward longer wavelengths, obtained when varying the aromatic ring content of the bridging ligand, suggested the existence of strong π−π stacking in the hybrid material. Experiments revealed a stronger luminescence in those samples exhibiting the higher extent of short-range order in SAXS.

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Section: Resultsmentioning

confidence: 73%

“…27−31 In numerous of the developed composite materials, or in chemical-bonded imidazolium units, the confinement of the imidazolium moieties within the pores of a matrix forced, and thus enhanced strongly, the π−π stacking of the imidazolium aromatic rings. 9,32 …”

Section: Introductionmentioning

confidence: 99%

Photoluminescence as Complementary Evidence for Short-Range Order in Ionic Silica Nanoparticle Networks

et al. 2010

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“…Nuclear magnetic resonance (NMR 13 C and 15 N spectra were recorded with ramped CP MAS experiments (cross polarization and magic angle spinning) while 31 P was recorded with HPDEC (high-power decoupling) and 11 B with single pulse method. The sample holders were spun at 6 kHz for the 31 P, 15 N and 13 C experiments and at 10 kHz for the 11 B measurements.…”

Section: Measurementsmentioning

confidence: 99%

“…29 Focusing on the physico-chemical properties of imidazolium based hybrid materials, [30][31][32][33][34]7 the imidazolium counter anion seems to also play a crucial role. 29 Focusing on the physico-chemical properties of imidazolium based hybrid materials, [30][31][32][33][34]7 the imidazolium counter anion seems to also play a crucial role.…”

Section: Introductionmentioning

confidence: 99%

Anion metathesis in ionic silicananoparticle networks

et al. 2010

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Metathesis reactions in acetone were performed on ionic silica networks based on imidazolium chloride bridging units. The salts investigated were NaBF 4 , KPF 6 and LiN(SO 2 CF 3 ) 2 . XRD experiments and NMR analysis were used to follow the anion metathesis. For all compounds the thermal stability of the hybrid material was maintained after metathesis. SAXS experiments confirmed that the anion metathesis only very slightly affected the short-range order of the network. However, the yield of the metathesis reaction, depending on the length of the imidazolium based ligand, was evaluated by EDX analyses. The anion metathesis reaction provides a tailoring tool for hybrid material hydrophobicity.

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“…To determine the effect of immobilization on the T m of [5,9,[12][13][14] in which a significant T m depression is also observed when ILs are immobilized or confined to the solid surfaces. However, the degree of depression in this work is lower than previously reported values, most likely due to the much larger diameter of the submicrospheres and different surface groups used in this study.…”

Section: Morphology Comparison and Phase Behavior Changementioning

confidence: 99%

Property variation of ionic liquid [Bmim][AuCl4] immobilized on carboxylated polystyrene submicrospheres with a small surface area

et al. 2013

Chin. Sci. Bull.

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In order to understand the effect of surface chemical groups on the immobilized species, Au-containing imidazolium-based ionic liquid (IL) [Bmim] [AuCl 4 ] was intentionally immobilized on polystyrene (PS) submicrospheres (d ~300 nm) with a very small surface area (4-10 m 2 /g), which possess carboxyl-moiety (COONa or COOH) on the surface. The behavior of immobilized [Bmim][AuCl 4 ] on the two types of submicrospheres was investigated by transmission electron microscopy (TEM), differential scanning calorimetry (DSC), and powder X-ray diffraction (XRD). It was revealed that the melting points (T m ) of [Bmim] [AuCl 4 ] that had been immobilized on PS-COONa and PS-COOH submicrospheres were decreased by 2.7 and 4.1°C, respectively. The interaction mechanism between the IL and submicrosphere surface moieties was further analyzed by X-ray absorption fine structure (XAFS) analysis. The data indicated that the coordination environment of Au species changed markedly when [Bmim] [AuCl 4 ] was immobilized on the surfaces of PS-COONa and PS-COOH submicrospheres, as illustrated by the decrease in white line peak intensity. The effect of surface COOH groups on T m depression and the white line peak intensity of the XANES spectrum is more pronounced than that of COONa groups, most likely due to the possible hydrogen bond formation between the COOH group and

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Confinement of 1-Butyl-3-methylimidazolium Nitrate in Metallic Silver

Cited by 53 publications

References 28 publications

Photoluminescence as Complementary Evidence for Short-Range Order in Ionic Silica Nanoparticle Networks

Photoluminescence as Complementary Evidence for Short-Range Order in Ionic Silica Nanoparticle Networks

Anion metathesis in ionic silicananoparticle networks

Property variation of ionic liquid [Bmim][AuCl4] immobilized on carboxylated polystyrene submicrospheres with a small surface area

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