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Functional carbazole liquid-crystal block codendrimers with optical and electronic properties

AuthorsGracia, Ismael; Feringán, Beatriz; Serrano, José Luis; Termine, Roberto; Golemme, Attilio; Omenat, Ana; Barberá, Joaquín
KeywordsCharge transport
Liquid crystals
Issue DateJan-2015
CitationChemistry - A European Journal 21(3): 1359-1369 (2015)
AbstractThe synthesis and characterisation of a family of block codendrimers consisting of highly versatile mesogenic and carbazole-containing 2,2-bis(hydroxymethyl)propionic acid (bis-MPA) dendrons are reported. The liquid-crystal behaviour was investigated by means of differential scanning calorimetry, polarised-light optical microscopy and X-ray diffraction. Depending on the chemical structure of the constituent dendrons, the codendrimers show lamellar or columnar mesophases. On the basis of the experimental results, models both at the molecular level and in the mesophase are proposed. The physical properties of the block codendrimers derived from the presence of the carbazole moiety in their structure were investigated: photoluminescence in solution and in the mesophase, electrochemical behaviour and hole transport. Electrodeposition of carbazole dendrons afforded a globular supramolecular conformation in which the mesogenic molecular side plays a key role.
Publisher version (URL)http://dx.doi.org/10.1002/chem.201404555
Appears in Collections:(ICMA) Artículos
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