Sign-alternating optical reorientation in nematic liquid crystals with low-molar-mass and polymeric absorbing bis-azobenzene dopants

0560614 - FZÚ 2023 RIV NL eng J - Článek v odborném periodiku
Budagovsky, I. - Kuznetsov, A. - Shvetsov, S. - Smayev, M. - Zolot'ko, A. - Cigl, Martin - Hamplová, Věra - Bobrovsky, A.
Sign-alternating optical reorientation in nematic liquid crystals with low-molar-mass and polymeric absorbing bis-azobenzene dopants.
Journal of Molecular Liquids. Roč. 339, Oct (2021), č. článku 117141. ISSN 0167-7322. E-ISSN 1873-3166
Institucionální podpora: RVO:68378271
Klíčová slova: nematic liquid crystals * orientational optical nonlinearity * sign-alternating nonlinearity * polymers * bis-azobenzene compounds
Obor OECD: Polymer science
Impakt faktor: 6.633, rok: 2021
Způsob publikování: Omezený přístup
https://doi.org/10.1016/j.molliq.2021.117141

A comparative study of optical orientation in nematic liquid crystals (NLCs) doped with a low-molarmass bis-azobenzene dye (monomer) and a comb-shaped polymer with side fragments similar in structure to the monomer has been carried out. Both types of bis-azobenzene dopants induced a signalternating nonlinearity in the NLC. The magnitudes of the optical-torque enhancement factors due to trans- and cis-isomers, and their ratios for the low- and high-molar-mass dopants are compared. The results obtained show the possibilities of increasing the orientational optical nonlinearity when passing from low-molar bis-azobenzene dye dopants to the corresponding polymers and are important for elucidating the optimal architecture of absorbing additives.
Trvalý link: https://hdl.handle.net/11104/0333476