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Functional Janus dendrimers containing carbazole with liquid crystalline, optical and electrochemical properties
- Source :
- Digital.CSIC. Repositorio Institucional del CSIC, instname
- Publication Year :
- 2019
- Publisher :
- Taylor & Francis, 2019.
-
Abstract
- Novel liquid crystalline Janus dendrimers that combine a mesogenic block and an electroactive block have been synthesised. The mesogenic block is based on two third-generation Percec-type dendrons bearing six or eight terminal dodecyloxy alkyl chains, whereas the electroactive blocks are formed by one or two carbazole units. The liquid crystal behaviour was investigated by polarised-light optical microscopy, differential scanning microscopy and X-ray diffraction. The Janus dendrimers with one electroactive unit exhibited cubic or columnar liquid crystal phases, whereas the Janus dendrimers with two electroactive units did not show liquid crystalline behaviour. The UV-vis absorption and emission properties of the Janus dendrimers were investigated. The spectra suggested the existence of π-π stacking and the formation of aggregates in the solid state. Electrodeposition of the carbazole-containing dendrimers afforded semi-globular particles in which the number of electropolymerizable units and the flexible or rigid character of the linker have a decisive influence in the particle size.<br />This work was supported by the MINECO-FEDER funds (project CTQ2015-70174), Gobierno de Aragón-FSE (Research Group E47_17R).
- Subjects :
- Dendrimers
Materials science
Carbazole
02 engineering and technology
Electrochemistry
01 natural sciences
chemistry.chemical_compound
Liquid crystal
Dendrimer
Block (telecommunications)
General Materials Science
Janus
010405 organic chemistry
Liquid crystalline
Mesogen
Electropolymerization
General Chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
0104 chemical sciences
Columnar liquid crystals
chemistry
Chemical engineering
0210 nano-technology
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- Digital.CSIC. Repositorio Institucional del CSIC, instname
- Accession number :
- edsair.doi.dedup.....c846d7c1ca4f1c752fa0a9a9f004b91f