Imidazoliumbasierte ionische Flüssigkeiten als effiziente forminduzierende Lösungsmittel für die Synthese von Gold‐Nanostäbchen

Ryu, Hyung Ju; Sanchez, Luz M.; Keul, Heidrun A.; Raj, A. R. Naresh

doi:10.1002/ange.200802185

Cited by 13 publications

(2 citation statements)

References 34 publications

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“…Similarly, Bockstaller and co‐workers prepared Au nanorods in 1‐ethyl‐3‐methylimidazolium ethylsulfate ([Emim][ES]) without the need for additional stabilizing agents. They proposed that the imidazolium cations had different binding affinities to different crystal facets of the Au nanoparticles, thereby resulting in the formation of Au nanorods 21. Furthermore, Bouvy et al.…”

Section: Introductionmentioning

confidence: 99%

Understanding the Effect Models of Ionic Liquids in the Synthesis of NH₄‐Dw and γ‐AlOOH Nanostructures and Their Conversion into Porous γ‐Al₂O₃

Duan

Kim

et al. 2013

Chemistry A European J

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Well-dispersed ammonium aluminum carbonate hydroxide (NH4-Dw) and γ-AlOOH nanostructures with controlled morphologies have been synthesized by employing an ionic-liquid-assisted hydrothermal process. The basic strategies that were used in this work were: 1) A controllable phase transition from NH4-Dw to γ-AlOOH could be realized by increasing the reaction temperature and 2) the morphological evolution of NH4-Dw and γ-AlOOH nanostructures could be influenced by the concentration of the ionic liquid. Based on these experimental results, the main objective of this work was to clarify the effect models of the ionic liquids on the synthesis of NH4-Dw and γ-AlOOH nanostructures, which could be divided into cationic- or anionic-dominant effect models, as determined by the different surface structures of the targets. Specifically, under the cationic-dominant regime, the ionic liquids mainly showed dispersion effects for the NH4-Dw nanostructures, whereas the anionic-dominant model could induce the self-assembly of the γ-AlOOH particles to form hierarchical structures. Under the guidance of the proposed models, the effect of the ionic liquids would be optimized by an appropriate choice of cations or anions, as well as by considering the different effect models with the substrate surface. We expect that such effect models between ionic liquids and the target products will be helpful for understanding and designing rational ionic liquids that contain specific functional groups, thus open up new opportunities for the synthesis of inorganic nanomaterials with new morphologies and improved properties. In addition, these as-prepared NH4-Dw and γ-AlOOH nanostructures were converted into porous γ-Al2O3 nanostructures by thermal decomposition, whilst preserving the same morphology. By using HRTEM and nitrogen-adsorption analysis, the obtained γ-Al2O3 samples were found to have excellent porous properties and, hence, may have applications in catalysis and adsorption.

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Section: Introductionmentioning

confidence: 99%

Understanding the Effect Models of Ionic Liquids in the Synthesis of NH₄‐Dw and γ‐AlOOH Nanostructures and Their Conversion into Porous γ‐Al₂O₃

Duan

Kim

et al. 2013

Chemistry A European J

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“…In this work, we report a droplet‐based chemical analysis method ( Figure a–d) possessing some intriguing features: (i) the unique physical and chemical characteristics of IL enables analyte (metal ion) to partition only between aqueous and ionic liquid compartments and not to the carrier fluorinated oil, (ii) analyte catalyzes the transformation of a substrate into a fluorescence emitting product in the ionic liquid compartment, and (iii) both the substrate and fluorescent product remain in the IL compartment due to their preferential solubility in IL, hence any cross‐contamination and dilution of fluorescence signal due to leaching out of the substrate/product is minimized. To demonstrate this new concept of IL–Aq droplet‐based analysis, we selected Au(III) ion (gold salt: HAuCl 4 ·3H 2 O) as a model aqueous analyte which is soluble in ionic liquids,25, 26 known to catalyze numerous organic reactions,27–29 and is a common precursor in nanomaterials synthesis 30. Real‐time investigation of fluorescence evolution in the IL compartment of a compound droplet is easily conducted by tracking the translating compound droplets with an optical stereomicroscope 31.…”

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Fireflies‐On‐A‐Chip: (Ionic Liquid)–Aqueous Microdroplets for Biphasic Chemical Analysis

Barikbin

Rahman

Khan

2012

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Inspired by the enchanting bioluminescence of fireflies, herein microfluidic droplet‐based ‘fireflies’ for non‐invasive biphasic chemical analysis are demonstrated. Bicompartmental droplets are created where a model analyte is transported from the aqueous compartment to the adjacent ionic liquid segment, yielding a bright fluid firefly structure via a localized catalytic reaction. Analysis of fluorescence emission kinetics and a method to passively decouple the two compartments at a constriction are presented.

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Elemental Sulfur as a Reactive Medium for Gold Nanoparticles and Nanocomposite Materials

et al. 2011

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Schwefelgelb: Elementarer Schwefel wird als unkonventionelles Medium für die Synthese und Stabilisierung von kolloidalem Gold genutzt. In diesem System erfüllt Schwefel viele Funktionen, wie die Sulfurierung von PPh3 und die Solubilisierung und Reduktion von AuI‐Vorstufen zu Au‐Nanopartikeln (NPs; siehe Bild). Die Vulkanisation von Au‐haltigen Schwefeldispersionen erfordert vernetzte Nanokomposite, die mit TEM, XRD, XPS und Raman‐Spektroskopie nachgewiesen wurden.

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Imidazoliumbasierte ionische Flüssigkeiten als effiziente forminduzierende Lösungsmittel für die Synthese von Gold‐Nanostäbchen

Cited by 13 publications

References 34 publications

Understanding the Effect Models of Ionic Liquids in the Synthesis of NH₄‐Dw and γ‐AlOOH Nanostructures and Their Conversion into Porous γ‐Al₂O₃

Understanding the Effect Models of Ionic Liquids in the Synthesis of NH₄‐Dw and γ‐AlOOH Nanostructures and Their Conversion into Porous γ‐Al₂O₃

Fireflies‐On‐A‐Chip: (Ionic Liquid)–Aqueous Microdroplets for Biphasic Chemical Analysis

Elemental Sulfur as a Reactive Medium for Gold Nanoparticles and Nanocomposite Materials

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Imidazoliumbasierte ionische Flüssigkeiten als effiziente forminduzierende Lösungsmittel für die Synthese von Gold‐Nanostäbchen

Cited by 13 publications

References 34 publications

Understanding the Effect Models of Ionic Liquids in the Synthesis of NH4‐Dw and γ‐AlOOH Nanostructures and Their Conversion into Porous γ‐Al2O3

Understanding the Effect Models of Ionic Liquids in the Synthesis of NH4‐Dw and γ‐AlOOH Nanostructures and Their Conversion into Porous γ‐Al2O3

Fireflies‐On‐A‐Chip: (Ionic Liquid)–Aqueous Microdroplets for Biphasic Chemical Analysis

Elemental Sulfur as a Reactive Medium for Gold Nanoparticles and Nanocomposite Materials

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Understanding the Effect Models of Ionic Liquids in the Synthesis of NH₄‐Dw and γ‐AlOOH Nanostructures and Their Conversion into Porous γ‐Al₂O₃

Understanding the Effect Models of Ionic Liquids in the Synthesis of NH₄‐Dw and γ‐AlOOH Nanostructures and Their Conversion into Porous γ‐Al₂O₃