Alkoxy substituted (E,E)-3,6-bis(styryl)pyridazine—a photosensitive mesogen for liquid crystals |
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Authors: | Thorsten Lifka |
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Affiliation: | Institute of Organic Chemistry, University of Mainz, Duesbergweg 10-14, 55099 Mainz, Germany |
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Abstract: | (E,E)-3,6-Bis(styryl)pyridazines (3a-t) bearing 2, 4 or 6 alkoxy chains were prepared by applying the Siegrist reaction of 3,6-dimethylpyridazine (13) and the corresponding azomethines 10a-t. The transversal dipole moment of these calamitic compounds effects an extremely high tendency for self-organization in thermotropic LC phases (N, SA, SB, SC, SE, SI/F, and Cub). The conjugated core structure represents moreover a chromophore with a high photosensitivity for (E,E)?(E,Z) isomerization reactions: this property makes the compounds interesting for optical imaging and switching techniques. |
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Keywords: | Condensation reaction Liquid crystals Photoisomerization Self-organization |
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