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Effect of photoaligning azo dye structure on liquid crystal anchoring energy |
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| Authors: | Natalya N Barabanova Victor V Belyaev Dmitriy L Bogdanov Vladimir G Chigrinov Artem K Dadivanyan Artem P Nazarov Olga V Noah |
| Affiliation: | 1. Moscow Region State University, Moscow, 105005, Russia;2. Peoples' Friendship University of Russia, Moscow, Russia;3. Hong Kong University of Science and Technology, Hong Kong;4. Moscow State University, Moscow, Russia |
| Abstract: | A method of controlling anchoring energy of surface interaction of liquid crystal photoaligning substances is considered to enhance the liquid crystal display performances. An important parameter of the dye's molecular structure that determines the ratio of polar and azimuthal anchoring energy is the ability to form dimers. The values of dimerization thermodynamic potentials have been found. The probability of the formation of dye molecules dimers is evaluated. The bonds conjugation transfer via intermolecular hydrogen bond is revealed, and anisotropy of polarizability of the hydrogen bond is evaluated. The effect of dimerization on polar and azimuthal anchoring energy of liquid crystal — azo dye system — is shown. |
| Keywords: | liquid crystals displays anchoring energy dyes dimerization hydrogen bond |