Light-responsive bent-core liquid crystals as candidates for energy conversion and storage
Dominguez-Candela, Ivan ; Zulkhairi, Iman ; Pintre, Inmaculada ; Aripin, Nurul Fadhilah Kamalul ; Lora-Garcia, Jaime ; Fombuena, Vicent ; Ros, M. Blanca (Universidad de Zaragoza) ; Martinez-Felipe, Alfonso
Resumen: We have assessed the potential of light-responsive bent-core liquid crystals as candidate materials for energy conversion and storage applications. Samples comprise two chromophore bent-core compounds containing either one (IP33) or two (IP31) azobenzene groups, and their 5% (molar) mixtures with one non-chromophore bent-core compound (NG75), which was also measured as a reference material. The pristine compounds and their mixtures were introduced in thin transparent Indium Tin Oxide (ITO) cells, and were characterised by polarised optical microscopy, UV-visible spectrophotometry, impedance spectroscopy, and ferroelectric analysis, under different conditions of electrical fields and UV irradiation. All materials display smectic C polar phases (SmCP) except IP31, which forms columnar phases (Col), and IP33, IP31 and their mixtures exhibit light-responsiveness when irradiated at 365 nm due to reversible trans-to-cis photoisomerisation of the azobenzene units. All the bent-core based materials exhibit, at least, two dielectric relaxations, associated with different modes of molecular reorientation under weak alternating electrical fields (1 Vrms), as well as ferroelectric response that leads to permanent polarisation under the application of strong alternating fields (∼75 kV cm−1) at frequencies associated with the Goldstone-mode (1 Hz). Samples show considerable conductivity values and relaxor behaviour for liquid crystals, which can be tuned by application of UV light. In addition, we have induced in IP31 isothermal phase transitions from columnar to smectic phases (via the isotropic melt), by a combination of light and electrical stimuli. Our results confirm the potential of these bent-core compounds as light-harvesters for energy applications.
Idioma: Inglés
DOI: 10.1039/d2tc04106e
Año: 2022
Publicado en: JOURNAL OF MATERIALS CHEMISTRY C 10, 48 (2022), 18200-18212
ISSN: 2050-7526
Factor impacto JCR: 6.4 (2022)
Categ. JCR: PHYSICS, APPLIED rank: 32 / 160 = 0.2 (2022) - Q1 - T1
Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 86 / 343 = 0.251 (2022) - Q2 - T1
Factor impacto CITESCORE: 11.8 - Chemistry (Q1) - Materials Science (Q1)
Factor impacto SCIMAGO: 1.534 - Materials Chemistry (Q1) - Chemistry (miscellaneous) (Q1)
Financiación: info:eu-repo/grantAgreement/ES/DGA-FEDER/E47-20R
Financiación: info:eu-repo/grantAgreement/ES/MCIU-FEDER/PGC2018-093761-B-C31
Tipo y forma: Article (Published version)
Área (Departamento): Área Química Orgánica (Dpto. Química Orgánica)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes.
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Idioma: Inglés
DOI: 10.1039/d2tc04106e
Año: 2022
Publicado en: JOURNAL OF MATERIALS CHEMISTRY C 10, 48 (2022), 18200-18212
ISSN: 2050-7526
Factor impacto JCR: 6.4 (2022)
Categ. JCR: PHYSICS, APPLIED rank: 32 / 160 = 0.2 (2022) - Q1 - T1
Categ. JCR: MATERIALS SCIENCE, MULTIDISCIPLINARY rank: 86 / 343 = 0.251 (2022) - Q2 - T1
Factor impacto CITESCORE: 11.8 - Chemistry (Q1) - Materials Science (Q1)
Factor impacto SCIMAGO: 1.534 - Materials Chemistry (Q1) - Chemistry (miscellaneous) (Q1)
Financiación: info:eu-repo/grantAgreement/ES/DGA-FEDER/E47-20R
Financiación: info:eu-repo/grantAgreement/ES/MCIU-FEDER/PGC2018-093761-B-C31
Tipo y forma: Article (Published version)
Área (Departamento): Área Química Orgánica (Dpto. Química Orgánica)
You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. You may not use the material for commercial purposes. Exportado de SIDERAL (2024-03-18-14:47:05)
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Record created 2023-01-11, last modified 2024-03-19