Nanoparticles connected through an ionic liquid-like network

Litschauer, Marco; Néouze, Marie-Alexandra

doi:10.1039/b713442h

Cited by 58 publications

(68 citation statements)

References 32 publications

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“…(21); the anion exchange reaction on Im/Cl to obtain Im/PF 6 , Im/BF 4 , or Im/N(SO 2 CF 3 ) 2 ;(34) the reaction of N -(3-propyltrimethoxysilane)imidazole modified silica nanoparticles with 1,6-dichlorohexane which led to the product Im/Cl/Hex/Im/Cl . (33)…”

Section: Methodsmentioning

confidence: 99%

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: Methodsmentioning

confidence: 99%

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

et al. 2010

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“…26 The hybrid material 2Im/Cl was obtained by reaction of N-(3propyltrimethoxysilyl)imidazole modified silica nanoparticles with dichlorobenzene. 26 The hybrid material 2Im/Cl was obtained by reaction of N-(3propyltrimethoxysilyl)imidazole modified silica nanoparticles with dichlorobenzene.…”

Section: Synthesismentioning

confidence: 99%

“…[1][2][3][4][5][6][7][8][9][10][11][12] Such materials are very promising for many different applications, like among others, catalysis, 13-15 luminescence [16][17][18] or as electrolytes. [25][26][27] The studied nIm/X are a novel type of ion-rich hybrid materials, which should help to fill the gap between the nanoparticle ionic materials (NIMS), 23,28,29 that are liquid systems, and solid ion gels, 2,8,11 solid but frequently leaching. [25][26][27] The studied nIm/X are a novel type of ion-rich hybrid materials, which should help to fill the gap between the nanoparticle ionic materials (NIMS), 23,28,29 that are liquid systems, and solid ion gels, 2,8,11 solid but frequently leaching.…”

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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“…4 (ii), representing the azide functionalized SiNPs show an initial approximate weight loss of 14.5% from 30 to 250°C and a further loss of 27.3% from 300 to 800°C. Processes that may be occurring as the temperature increases include water desorption, dehydration of silica, oxidation of any remaining residual organics and relaxation of the silica matrix [28][29][30].…”

Section: Thermal Analysismentioning

confidence: 99%