133293 20260217205514.0 doi 10.1016/j.molliq.2024.124371 sideral 137936 ART-2024-137936 eng Liebsch, Jasmin Tailoring the dielectric and ferroelectric response of mixtures containing bent-core liquid crystals through light-irradiation and composition 2024 Access copy available to the general public Unrestricted We report the mesomorphic behaviour, dielectric and ferroelectric properties, and computational modelling of binary mixtures containing two bent-core liquid crystals: the so-called NG75-COO (3,4́- Bis[4-(4-n-tetradecyloxybenzoyloxy)benzoyloxy]biphenyl), which forms smectic phases, and IP31- AzB (3,4′ - Bis[4-(4-n-tetradecyloxyphenylazo)benzoyloxy]biphenyl), which forms columnar phases. The phase diagram, assessed by polarised optical microscopy, shows that the binary mixtures retain the mesophase behaviour of the major component, whilst the equimolar mixture displays smectic-type phases. Dielectric and ferroelectric analyses were carried out on samples containing 10%, 50%, and 90% of IP31-AzB (molar %), and we also investigated structure–property correlations by differential functional theory. The NG75-COO/IP31-AzB mixtures undergo strong dielectric and ferroelectric response due to the presence of highly polarisable groups in the bent-core components, particularly at the ester groups. All the mixtures under study exhibit light-responsiveness induced by reversible E-to-Z photoisomerization (trans-to-cis) of the azobenzene group in IP31-AzB, together with an increase in the molecular dipole moment. The potential to tune the phase behaviour of the mixtures, as well as their dielectric and ferroelectric responses, are investigated by light irradiation under different conditions of intensity and temperature. info:eu-repo/grantAgreement/ES/DGA/E47-23R info:eu-repo/grantAgreement/ES/MICINN-FEDER/PID2021-122882NB-I00 info:eu-repo/semantics/openAccess by-nc https://creativecommons.org/licenses/by-nc/4.0/deed.es 5.2 2024 PHYSICS, ATOMIC, MOLECULAR & CHEMICAL 6 / 39 = 0.154 2024 Q1 T1 CHEMISTRY, PHYSICAL 63 / 185 = 0.341 2024 Q2 T2 0.935 2024 Atomic and Molecular Physics, and Optics 2024 Q1 Condensed Matter Physics 2024 Q1 Spectroscopy 2024 Q1 Materials Chemistry 2024 Q1 Physical and Theoretical Chemistry 2024 Q1 Electronic, Optical and Magnetic Materials 2024 Q1 10.5 2024 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Strachan, Rebecca Suthaharan, Sivanujan Dominguez-Candela, Ivan Auria-Soro, Carlota San-Millan, Andres Walker, Rebecca Chilukuri, Bhaskar Ros, M. Blanca Universidad de Zaragoza (orcid)0000-0003-4416-1036 Martinez-Felipe, Alfonso 2013 765 Universidad de Zaragoza Dpto. Química Orgánica Área Química Orgánica 399 (2024), 124371 [11 pp.] J. mol. liq. Journal of Molecular Liquids 0167-7322 9524106 http://zaguan.unizar.es/record/133293/files/texto_completo.pdf Versión publicada 2479695 http://zaguan.unizar.es/record/133293/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:133293 articulos driver 2026-02-17-20:26:22 ARTICLE