130213 20241125101149.0 doi 10.1002/hlca.202300010 sideral 133681 ART-2023-133681 eng Concellón, Alberto Universidad de Zaragoza (orcid)0000-0002-8932-9085 Ionic liquid crystalline calixarene with photo-switchable proton conduction 2023 Access copy available to the general public Unrestricted We have developed a new strategy for the preparation of a light-responsive ionic liquid crystal (LC) that shows photo-switchable proton conduction. The ionic LC consists of a bowl-shaped calix[4]arene core ionically functionalized with azobenzene moieties. The non-covalent architectures were obtained by the formation of ionic salts between the carboxylic acid group of an azo-derivative and the terminal amine groups of a calixarene core. The presence of ionic salts results in a hierarchical self-assembly process that extends to the formation of a nanostructured lamellar LC arrangement (smectic A phase). In this LC phase, the ionic LC calixarene is able to display proton conductive properties, since the ionic nanosegregated areas (formed by the ionic pairs) generate the continuous channels that favor proton transport. The optical and photo-responsive properties were studied by UV-Vis spectroscopy, demonstrating that the azobenzene moieties of the ionic LC undergo reversible (E)-to-(Z) isomerization by irradiation with UV light. Interestingly, this (E)-to-(Z) photoisomerization results in a decrease of the proton conductivity values since the bent-shaped (Z)-isomer disrupts the lamellar LC phase. This isomerization process is totally reversible and leads to an ionic LC material with unique photo-switchable proton conductive properties. info:eu-repo/grantAgreement/ES/DGA/E47-17R info:eu-repo/grantAgreement/ES/MCIU/PGC2018-097583-B-I00 info:eu-repo/grantAgreement/ES/MICINN-FEDER/PID2021-122882NB-I00 info:eu-repo/grantAgreement/ES/MICINN/RYC2021-031154-I info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 1.5 2023 CHEMISTRY, MULTIDISCIPLINARY 155 / 231 = 0.671 2023 Q3 T3 0.557 2023 Drug Discovery 2023 Q2 Organic Chemistry 2023 Q2 Physical and Theoretical Chemistry 2023 Q2 Inorganic Chemistry 2023 Q2 Catalysis 2023 Q3 Biochemistry 2023 Q3 3.0 2023 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Marín, Iván Universidad de Zaragoza Barberá, Joaquín Universidad de Zaragoza (orcid)0000-0001-5816-7960 Marcos, Mercedes (orcid)0000-0001-7056-3181 Serrano, José L. Universidad de Zaragoza (orcid)0000-0001-9866-6633 2013 765 Universidad de Zaragoza Dpto. Química Orgánica Área Química Orgánica 106, 5 (2023), e202300010 [8 pp.] Helv. chim. acta HELVETICA CHIMICA ACTA 0018-019X 654937 http://zaguan.unizar.es/record/130213/files/texto_completo.pdf Postprint info:eu-repo/date/embargoEnd/2024-02-23 2502627 http://zaguan.unizar.es/record/130213/files/texto_completo.jpg?subformat=icon icon Postprint info:eu-repo/date/embargoEnd/2024-02-23 oai:zaguan.unizar.es:130213 articulos driver 2024-11-22-12:06:08 ARTICLE