Organic Reactions in Microemulsions

Häger, Maria; Currie, Fredrik; Holmberg, Krister

doi:10.1007/3-540-36412-9_3

Cited by 49 publications

(29 citation statements)

References 51 publications

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“…This type of research is, however, beyond the scope of the present review. 127 As mentioned above, surfactants with p ) < 1 / 2 will form micellar aggregates upon dispersal in water. Mainly depending on the concentration, thermodynamically stable morphologies will be formed; going up in concentration, these are spherical, rodlike, and hexagonal morphologies.…”

Section: Micelle-based Systemsmentioning

confidence: 94%

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Self‐Assembled Nanoreactors

et al. 2005

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Section: Micelle-based Systemsmentioning

confidence: 94%

“…Apart from low molecular weight surfactants, 127 micelle-forming block copolymers have been applied for this purpose. Jang and Ha have used poly-(oxyethylene)-b-poly(oxypropylene)-b-poly(oxyethylene) to make hollow polystyrene nanospheres.…”

Section: Polymer Micelles As Nanoreactorsmentioning

confidence: 99%

Self‐Assembled Nanoreactors

et al. 2005

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“…[4][5][6] The selfassembly of amphiphiles has been shown to be of significant importance in many research fields, for example as building blocks for the fabrication of novel organic nanotubes or nanofibers for electrical and medical devices, [7][8][9][10][11] candidates for drug delivery, [12][13][14][15] templates for processing well-defined materials, [16][17][18] nano/microreators for carrying on some reactions in aqueous solution, and even for artificial-enzyme-mimicking [19][20][21][22][23] stabilizers for incorporating emulsions used for cleaning and green organic reactions. [24,25] Moreover, the introduction of stimuli-responsive groups into building blocks can lead to the fabrication of smart supramolecular materials that are responsive to the external stimuli, such as light irradiation, heating, or pH change.…”

Section: Introductionmentioning

confidence: 99%

Tuning the Amphiphilicity of Building Blocks: Controlled Self‐Assembly and Disassembly for Functional Supramolecular Materials

2009

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Amphiphilicity is one of the molecular bases for self‐assembly. By tuning the amphiphilicity of building blocks, controllable self‐assembly can be realized. This article reviews different routes for tuning amphiphilicity and discusses different possibilities for self‐assembly and disassembly in a controlled manner. In general, this includes irreversible and reversible routes. The irreversible routes concern irreversible reactions taking place on the building blocks and changing their molecular amphiphilicity. The building blocks are then able to self‐assemble to form different supramolecular structures, but cannot remain stable upon loss of amphiphilicity. Compared to the irreversible routes, the reversible routes are more attractive due to the good control over the assembly and disassembly of the supramolecular structure formed via tuning of the amphiphilicity. These routes involve reversible chemical reactions and supramolecular approaches, and different external stimuli can be used to trigger reversible changes of amphiphilicity, including light, redox, pH, and enzymes. It is anticipated that this line of research can lead to the fabrication of new functional supramolecular assemblies and materials.

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“…The use of surfactants in reaction media is well known to overcome mass transfer limitations and incompatibilities between reactants [25]. For this reason the effect of the surfactant concentration on the hydrogenation of sunflower oil was studied.…”

Section: Influence Of the Surfactant Concentrationmentioning

confidence: 99%

Catalytic Hydrogenations in Microemulsion Systems with Rh-TPPTS: Partial Hydrogenation of Sunflower Oil

Milano-Brusco

Schomäcker

2009

Catal Lett

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The effect of the P/Rh ratio and the surfactant concentration on the partial hydrogenation of sunflower oil in Triton X-100 microemulsion systems with the watersoluble catalyst complex Rh-TPPTS has been studied. An unusual hindering effect of the surfactant on the production of elaidic acid and stearic acid as the oil is hydrogenated was observed. When increasing the concentration of Triton X-100 in the reaction medium from 3 to 15 wt%, the content of elaidic acid and stearic acid were lowered 21 and 34%, respectively. The maximum content of oleic acid was attained when the concentration of Triton X-100 was 15 wt%, obtaining a high content of 51.8% of oleic acid. When the ligand/metal ratio was higher, the reaction was slower but more selective to oleic acid. The Rh-TPPTS catalyst could be recycled up to 3 times after hydrogenation of sunflower oil by extracting the oil phase of a three-phase microemulsion system, observing a continuous deactivation of the catalyst.

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Organic Reactions in Microemulsions

Cited by 49 publications

References 51 publications

Self‐Assembled Nanoreactors

Self‐Assembled Nanoreactors

Tuning the Amphiphilicity of Building Blocks: Controlled Self‐Assembly and Disassembly for Functional Supramolecular Materials

Catalytic Hydrogenations in Microemulsion Systems with Rh-TPPTS: Partial Hydrogenation of Sunflower Oil

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