000121136 001__ 121136
000121136 005__ 20240319081007.0
000121136 0247_ $$2doi$$a10.1039/d2tc04106e
000121136 0248_ $$2sideral$$a131683
000121136 037__ $$aART-2022-131683
000121136 041__ $$aeng
000121136 100__ $$aDominguez-Candela, Ivan
000121136 245__ $$aLight-responsive bent-core liquid crystals as candidates for energy conversion and storage
000121136 260__ $$c2022
000121136 5060_ $$aAccess copy available to the general public$$fUnrestricted
000121136 5203_ $$aWe 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.
000121136 536__ $$9info:eu-repo/grantAgreement/ES/DGA-FEDER/E47-20R$$9info:eu-repo/grantAgreement/ES/MCIU-FEDER/PGC2018-093761-B-C31
000121136 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc$$uhttp://creativecommons.org/licenses/by-nc/3.0/es/
000121136 590__ $$a6.4$$b2022
000121136 592__ $$a1.534$$b2022
000121136 591__ $$aPHYSICS, APPLIED$$b32 / 160 = 0.2$$c2022$$dQ1$$eT1
000121136 593__ $$aMaterials Chemistry$$c2022$$dQ1
000121136 591__ $$aMATERIALS SCIENCE, MULTIDISCIPLINARY$$b86 / 343 = 0.251$$c2022$$dQ2$$eT1
000121136 593__ $$aChemistry (miscellaneous)$$c2022$$dQ1
000121136 594__ $$a11.8$$b2022
000121136 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000121136 700__ $$aZulkhairi, Iman
000121136 700__ $$aPintre, Inmaculada
000121136 700__ $$aAripin, Nurul Fadhilah Kamalul
000121136 700__ $$aLora-Garcia, Jaime
000121136 700__ $$aFombuena, Vicent
000121136 700__ $$0(orcid)0000-0003-4416-1036$$aRos, M. Blanca$$uUniversidad de Zaragoza
000121136 700__ $$aMartinez-Felipe, Alfonso
000121136 7102_ $$12013$$2765$$aUniversidad de Zaragoza$$bDpto. Química Orgánica$$cÁrea Química Orgánica
000121136 773__ $$g10, 48 (2022), 18200-18212$$pJ. mater. chem. C$$tJOURNAL OF MATERIALS CHEMISTRY C$$x2050-7526
000121136 8564_ $$s3477276$$uhttps://zaguan.unizar.es/record/121136/files/texto_completo.pdf$$yVersión publicada
000121136 8564_ $$s2749131$$uhttps://zaguan.unizar.es/record/121136/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000121136 909CO $$ooai:zaguan.unizar.es:121136$$particulos$$pdriver
000121136 951__ $$a2024-03-18-14:47:05
000121136 980__ $$aARTICLE