Journal of Physical Chemistry p. 8105 - 8110 (1989)
Update date:2022-08-03
Topics:
Belarbi, Z.
Sirlin, C.
Simon, J.
Andre, J.-J.
The synthesis and characterization of bis(phthalocyaninato)lutetium (Pc2Lu) and lithium phthalocyanine (PcLi) substituted with long alkyl chains are reported.They form columnar liquid crystals over an extended domain of temperature.Oxidation of the lutetium derivative to the corresponding ionic compound (s-Pc2Lu)+,BF4- leads to a more stable mesophase.The magnetic properties of (s-Pc)2Lu are determined by electron paramagnetic resonance (EPR) spectra demonstrating the influence of the disorder on the EPR line width.Electrical properties of the solid and liquid crystalline phases have been measured in the frequency range 10-3-105 Hz.The intracolumnar order is shown to determine the frequency dependence of the conductivity: ω0.8 for the disordered columnar liquid crystalline phase and ω0.5 for the corresponding ordered one.
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