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Peculiarities of the Relaxation Behavior of Nematic Liquid Crystal Compositions with Azochromophores and Quantum Dots

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Abstract

In this work, the relaxation process in mixtures of a nematic liquid crystal matrix with additives of azochromophores and CdSe/ZnS quantum dots is analyzed. The thermally initiated mesophase—isotropic liquid phase transition showed that the activation energy of this process increases almost equally upon the addition of AX-7 or AX-8 in an amount of 10 wt %. However, the photoinduced phase transition into isotropic state, analyzed by dielectric spectroscopy, demonstrates a significant difference when different azochromophores are present in the system as confirmed by activation energy values. This effect is associated with changes in the ratio of trans–cis-isomers. IR-spectroscopy revealed the unexpecting predominance of cis-isomers in AX-7, while trans-isomers are typical for AX-8. This difference was explained by a change in the distribution of electron density in the azochromophore fragments, taking into account the influence of aromatic ring substituents.

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REFERENCES

  1. H. K. Bisoyi and Q. Li, Chem. Rev. 116 (240), 15089 (2016). https://doi.org/10.1021/acs.chemrev.6b00415

    Article  Google Scholar 

  2. T. Kosa, L. Sukhomlinova, L. Su, B. Taheri, T. J. White, and T. J. Bunning, Nature (London, U.K.) 485 (7398), 347 (2012). https://doi.org/10.1038/nature11122

    Article  ADS  Google Scholar 

  3. S. Krisna Prasad, G. G. Nair, G. Hegde, K. L. Sandhya, D. S. Shankar Rao, C. V. Lobo, and C. V. Yelamaggad, Phase Trans. 78, 443 (2005). https://doi.org/10.1080/01411590500185690

    Article  Google Scholar 

  4. A. S. Merekalov, O. N. Karpov, G. A. Shandryuk, A. S. Plotnikova, O. A. Otmakhova, and R. V. Talroze, Liq. Cryst. 52, 171 (2024). https://doi.org/10.1080/02678292.2024.2418897

    Article  Google Scholar 

  5. J. Garcia-Amorós, H. Finkelmann, and D. Velasco, Phys. Chem. Chem. Phys. 13, 11233 (2011). https://doi.org/10.1039/c1cp20280d

    Article  Google Scholar 

  6. G. A. Shandryuk, Yu. A. Egorov, Ya. I. Derikov, V. S. Bezborodov, A. V. Finko, L. A. Golovan, and R. V. Talroze, Zhidk. Krist. Prakt. Ispol’z. 24 (1), 5 (2024). https://doi.org/10.18083/lcappl.2024.1.5

    Article  Google Scholar 

  7. V. Jirón, H. Wang, and O. D. Lavrentovich, Liq. Cryst. 51, 1064 (2024). .https://doi.org/10.1080/02678292.2023.2276842

    Article  ADS  Google Scholar 

  8. D. Aronzon, E. P. Levy, P. J. Collings, A. Chanishvili, G. Chilaya, and G. Petriashvili, Liq. Cryst. 34, 707 (2007). https://doi.org/10.1080/02678290701267480

    Article  Google Scholar 

  9. H. Rau, in Photoreactive Organic Thin Films, Ed. by Z. Sekkat and W. Knoll (Academic, San Diego, 2002), p. 3. https://doi.org/10.1016/B978-012635490-4/50002-0

    Book  Google Scholar 

  10. W. K. Bae, K. Char, H. Hur, and S. Lee, Chem. Mater. 20, 531 (2008). https://doi.org/10.1021/cm070754d

    Article  Google Scholar 

  11. O. N. Karpov, Y. I. Derikov, A. V. Finko, A. I. Saveliev, S. G. Mikhalyonok, N. M. Kuzmenok, V. S. Bezborodov, and R. V. Talroze, Zhidk. Krist. Prakt. Ispol’z. 23 (3), 23 (2023). https://doi.org/10.18083/LCAppl.2023.3.23

    Article  Google Scholar 

  12. Broadband Dielectric Spectroscopy, Ed. by F. Kremer and A. Schönhals (Springer, Berlin, 2002). https://doi.org/10.1007/978-3-642-56120-7

    Book  Google Scholar 

  13. L. M. Blinov, Structure and Properties of Liquid Crystals (Springer, New York, 2011; Librokom, Moscow, 2012). https://doi.org/10.1007/978-90-481-8829-1

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ACKNOWLEDGMENTS

We would like to thank Professor V.S. Bezborodov (BSTU, Minsk, Belarus) for providing the nematic matrix.

Funding

The work was carried out with the financial support of the Russian Science Foundation (project no. 23-19-00246).

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Authors and Affiliations

  1. A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, Moscow, Russia

    A. S. Merekalov, O. N. Karpov, Yu. A. Egorov, A. S. Plotnikova, S. A. Legkov, G. N. Bondarenko & R. V. Talroze

  2. Department of Physics, Lomonosov Moscow State University, Moscow, Russia

    O. N. Karpov & R. V. Talroze

Authors
  1. A. S. Merekalov
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  2. O. N. Karpov
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  3. Yu. A. Egorov
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  4. A. S. Plotnikova
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  6. G. N. Bondarenko
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  7. R. V. Talroze
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Corresponding author

Correspondence to A. S. Merekalov.

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Translated by N. Petrov

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Merekalov, A.S., Karpov, O.N., Egorov, Y.A. et al. Peculiarities of the Relaxation Behavior of Nematic Liquid Crystal Compositions with Azochromophores and Quantum Dots. Opt. Spectrosc. 133, 52–59 (2025). https://doi.org/10.1134/S0030400X25700109

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  • DOI: https://doi.org/10.1134/S0030400X25700109

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