Bent-core liquid crystals joining the ethylene-oxide/lithium ion tandem: Ionic conductivity and dielectric response towards new electrolytes for energy applications

Martínez-Felipe, Alfonso ; Zaton, Daniel ; Castillo-Vallés, Martín ; Baldini, Asia ; Pease, Jonathan ; Leader, Natalie ; Kamalul Aripin, Nurul Fadhilah ; Giacinti-Baschetti, Marco ; Ros, M. Blanca (Universidad de Zaragoza)

Resumen: We report the dielectric and conductivity response of three materials containing bent-core and tetra(ethylene-oxide) moieties, and their complexes doped with lithium triflate salts, as new potential nanostructured electrolytes. Whilst the pristine bent-core compounds do not show mesomorphism, the doped materials display smectic mesophases inside indium tin oxide cells assisted by the selective solvation of the lithium ions in the ethylene-oxide blocks. The dielectric response of the materials in the high-frequency range is controlled by the chemical composition of the bent-core structure, and the presence of lithium ions promotes direct current conductivity at low frequencies, in the σdc ∼ 10-5 S cm−1 range, which can be enhanced to σdc ∼ 10-4 S cm−1 via trans-to-cis photoisomerization of azobenzene groups. The dynamic and dual character of these materials (responding to low and high frequency electrical fields), the formation of ferroelectric crystals capable to store energy, and their interactions with light, will be applied to develop new energy devices.

Idioma: Inglés

DOI: 10.1016/j.molliq.2023.123100

Año: 2023

Publicado en: Journal of Molecular Liquids 390, Part B (2023), 123100 [12 pp.]
ISSN: 0167-7322

Factor impacto JCR: 5.3 (2023)

Categ. JCR: PHYSICS, ATOMIC, MOLECULAR & CHEMICAL rank: 6 / 40 = 0.15 (2023) - Q1 - T1
Categ. JCR: CHEMISTRY, PHYSICAL rank: 58 / 178 = 0.326 (2023) - Q2 - T1

Factor impacto CITESCORE: 10.3 - Condensed Matter Physics (Q1) - Spectroscopy (Q1) - Materials Chemistry (Q1) - Electronic, Optical and Magnetic Materials (Q1) - Physical and Theoretical Chemistry (Q1) - Atomic and Molecular Physics, and Optics (Q1)

Factor impacto SCIMAGO: 0.918 - Atomic and Molecular Physics, and Optics (Q1) - Electronic, Optical and Magnetic Materials (Q1) - Spectroscopy (Q1) - Materials Chemistry (Q1) - Physical and Theoretical Chemistry (Q1) - Condensed Matter Physics (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA/E47-23R
Financiación: info:eu-repo/grantAgreement/ES/MICINN-FEDER/PID2021-122882NB-I00
Financiación: info:eu-repo/grantAgreement/ES/MINECO/BES-2016-078753

Tipo y forma: Article (Published version)

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