Abstract
Abstract The preparation and characterization by standard methods of eleven diphenyldiacetylenes is discussed. All of these materials are liquid crystalline with phase transitions ranging from 90°C to 205°C. The liquid crystal behavior is studied using differential scanning calorimetry and polarized light microscopy. All the materials undergo irreversible polymerization from a liquid crystal state, possibly nematic. at over 210°C. The polymers are red and glassy. Some monomers give promising nonlinear optical results, the polymers are currently being tested. Both monomers and polymers are currently being tested in guest-host systems.
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