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Mesomorphic behaviour of praseodymium(III) alkanoates
Authors:Liesbet Jongen  Koen Binnemans  Dirk Hinz  Gerd Meyer
Institution:Institute of Mathematics and Physics, I. ?ukasiewicz Technical University , Rzesz?w, Poland
Abstract:In this paper, we describe the synthesis, characterization and thermal behaviour of praseodymium(III) alkanoates. The compounds have the stoichiometry Pr(C x H2x+1COO)3], where x = 5-19, and were characterized by elemental analysis and infrared spectroscopy. The thermal behaviour was investigated by hot-stage polarizing optical microscopy, DSC and high temperature X-ray diffraction. A highly viscous mesophase M and a smectic A phase were observed for the shorter chain compounds (x = 5-8), whereas only a smectic A phase was observed for the longer chain compounds of this type of metallomesogens. The chain length has a pronounced effect on the transition temperatures.
Keywords:
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