Modulating the Conductivity of Light-Responsive Ionic Liquid Crystals

Bendaoud, Umama ; Bhowmik, Pradip K. ; Chen, Si L. ; Han, Haesook ; Cox, Seonghyeok L. ; Liebsch, Jasmin ; Ros, M. Blanca (Universidad de Zaragoza) ; Selvi Velayutham, Thamil ; Aripin, Nurul Fadhilah Kamalul ; Martinez-Felipe, Alfonso

Resumen: In this work, we describe the phase behaviour and the dielectric and conductivity response of new light-responsive ionic liquid crystals, ILCs, which can be applied as controllable electrolytes. The materials include two different dicationic viologens, the asymmetric 6BP18 and the symmetric EV2ON(Tf)2, containing bistriflimide as the counterions, mixed with 5% and 50% molar, respectively, of one new photoresponsive mesogen called CNAzO14. These mixtures exhibit liquid crystal behaviour, light responsiveness through the E-Z photoisomerisation of the azobenzene groups in CNAzO14, and strong dielectric responses. The 5%-CNAzO14/Ev2ON(Tf)2 mixture displays direct current conductivities in the 10−7 S·cm−1 range, which can be increased by a two-fold factor upon the irradiation of UV light at 365 nm. Our findings set the grounds for designing new smart ionic soft materials with nanostructures that can be tuned and used for energy conversion and storage applications.

Idioma: Inglés

DOI: 10.3390/molecules29184459

Año: 2024

Publicado en: Molecules 29, 18 (2024), 4459 [13 pp.]
ISSN: 1420-3049

Financiación: info:eu-repo/grantAgreement/ES/DGA/E47-23R
Financiación: info:eu-repo/grantAgreement/ES/MICINN-FEDER/PID2021-122882NB-I00

Tipo y forma: Artículo (Versión definitiva)

Área (Departamento): Área Química Orgánica (Dpto. Química Orgánica)