Self-assembled bent-core side-chain liquid crystalline polymers.
The synthesis of H-bonded bent-core side-chain liquid crystal polymers carried out by two alternative synthetic routes and their properties are reported.
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Biomedical subjects
Nélida Gimeno
Publications and source records attributed to Nélida Gimeno.
Reactivity of Grubbs' catalysts with urea- and amide-substituted olefins. Metathesis and isomerization.
[Chemical reaction: see text] The reactions of a series of urea- and amide-substituted olefins with Grubbs' catalysts are presented. Depending on the substrate's nature, the formation of either cross-metathesis or isomerization products is observed. To favor the cross-metathesis products, the reactions have been carried out using a wide range of experimental conditions. Upon addition of monophenyl phosphoester to these reactions, the isomerization of the olefins is completely suppressed and the cross-metathesis products are obtained in up to 60% yield.
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Hydrogen-bonded banana liquid crystals.
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SmCP-networked films obtained by in situ photopolymerization of neat reactive banana-shaped liquid crystals.
The synthesis and characterization of reactive banana-shaped compounds have been carried out, and their ability to be photopolymerized in their SmCP mesophase has been assessed. The presence of a SmCP liquid crystalline phase in these compounds has been confirmed by X-ray studies. The polymerization of these molecules has been demonstrated by calorimetric techniques as well as by the preparation and characterization of SmCP-ordered free films that are mechanically stable at room temperature. Furthermore, polymerized films exhibit second harmonic generation activity at room temperature in the absence of an electric field.
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