Smectic phases of liquid crystals based on dinuclear palladium(II) complexes with carboxylato bridge |
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Authors: | V. Cî rcu,C. M. Simonescu |
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Abstract: | In this paper we present the preparation and the investigation of the liquid crystal properties of a series of dinuclear carboxylato bridge Pd(II) complexes bearing six alkoxy peripheral chains in the molecule. Their structures were assigned based on elemental analysis, IR and 1H NMR spectroscopy whereas the thermal behaviour was investigated by polarizing optical microscopy and differential scanning calorimetry. The monotropic smectic A phase displayed by these materials was identified by miscibility studies with a previously reported mesogen. It was found that the transition temperatures and the SmA mesophase stability depend on the alkyl chain length of the carboxylato bridge. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) |
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Keywords: | liquid crystals metallomesogens smectic phase orthometallation palladium(II) |
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