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Synthesis, Mesomorphism and Electrochemical Properties of Tetrasubstituted Zinc and Copper Phthalocyanines

Title data

Zharnikova, N. ; Usol'tseva, N. ; Kudrik, E. ; Thelakkat, Mukundan:
Synthesis, Mesomorphism and Electrochemical Properties of Tetrasubstituted Zinc and Copper Phthalocyanines.
In: Journal of Materials Chemistry. Vol. 19 (2009) Issue 20 . - pp. 3161-3167.
ISSN 0959-9428
DOI: https://doi.org/10.1039/b821306b

Project information

Project financing: Deutscher Akademischer Austauschdienst

Abstract in another language

We describe the synthesis of highly soluble, tetrasubstituted zinc and copper phthalocyanines exhibiting liquid crystalline properties. These compounds were characterized using elemental analysis, MS, 1HNMR,
FTIR and UV-Vis absorption spectroscopy. The liquid crystalline properties of phthalocyanines (Pcs) were studied by polarizing optical microscopy and differential scanning calorimetry. All of the four compounds exhibit thermotropic columnar mesophases and two of them
show clear hexagonal ordering. Additionally, these Pcs display lyotropic behaviour. The clearing
temperatures lie above 300 C and on cooling down the mesophase can be "frozen" into a glassy state.
The cyclic voltammetry studies of these phthalocyanines show electrochemical stability and reversible
redox behaviour. The Pcs without any azo groups in the ligands exhibit both reversible oxidation and
reduction, whereas those with azo groups show only reversible reduction steps. The low HOMO energy
values of about 5 eV as calculated from oxidation potential make these compounds interesting as p-type
organic semiconductors for electro-optical applications.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry I
Research Institutions
Research Institutions > Collaborative Research Centers, Research Unit
Research Institutions > Collaborative Research Centers, Research Unit > SFB 481 Komplexe Makromolekül- und Hybridsysteme in inneren und äußeren Feldern
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Professorship Applied Functional Polymers > Professorship Applied Functional Polymers - Univ.-Prof. Dr. Mukundan Thelakkat
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Professorship Applied Functional Polymers
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 14 Apr 2016 08:23
Last Modified: 21 Jul 2016 08:32
URI: https://eref.uni-bayreuth.de/id/eprint/1295