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Functional Carbazole Liquid‐Crystal Block Codendrimers with Optical and Electronic Properties
Author(s) -
Gracia Ismael,
Feringán Beatriz,
Serrano José Luis,
Termine Roberto,
Golemme Attilio,
Omenat Ana,
Barberá Joaquín
Publication year - 2015
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201404555
Subject(s) - mesophase , carbazole , mesogen , materials science , moiety , liquid crystal , crystallography , differential scanning calorimetry , lamellar structure , supramolecular chemistry , optical microscope , polymer chemistry , crystal structure , chemistry , stereochemistry , organic chemistry , liquid crystalline , scanning electron microscope , composite material , physics , optoelectronics , thermodynamics
The 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.