RT Journal Article
T1 Ionic liquid crystals containing pyridinium and pyrazolium units: mesomorphism and acidochromic behaviors
A1 Criado García, Rosario Presentación
A1 Duarte, Frederico
A1 Caro-Campos, Irene
A1 Cano Esquivel, María Mercedes
A1 Herrero Domínguez, Santiago
A1 Lodeiro, Carlos
A1 Cuerva de Alaiz, Cristian
AB Ionic liquid crystals are soft materials whose mesomorphic behavior can be strategically modulated as a function of their components, considering both the design of the organic cation and the nature of the inorganic anion. A new pyridylpyrazole derivative has been synthesized and used as a precursor for obtaining ionic salts that contain the corresponding dicationic fragment and different counterions. Most salts behave as liquid crystal materials exhibiting smectic A mesophases at temperatures ranging between 99 and 295 °C, as well as luminescence behavior in solution and/or the solid state. Interestingly, the related chloride salt emits blue light in the solid state under excitation at 261 nm, in contrast to the absence of the emission of the initial pyridylpyrazole derivative. This turn-on fluorescence response has been exploited to fabricate polymer supports that show a bright blue emission under exposure to hydrochloric acid.
PB Elsevier
YR 2025
FD 2025-07-19
LK https://hdl.handle.net/20.500.14352/123399
UL https://hdl.handle.net/20.500.14352/123399
LA eng
NO Criado R, Duarte F, Caro-Campos I, Cano M, Herrero S, Lodeiro C, Cuerva C. Ionic liquid crystals containing pyridinium and pyrazolium units: mesomorphism and acidochromic behaviors. DyesPigments. 2025;243:113050
NO FCT/MCTES, Fundação para a Ciência e Tecnologia and Ministério da Ciência, Tecnologia e Ensino Superior (projects UIDB/50006/2020 and UIDP/50006/2020)
NO PROTEOMASS Scientific Society (General Funding Grant 2023–2024, and the projects #PM001/2019 and #PM003/2016)
NO Complutense University of Madrid (project PR3/23–30828)
NO Community of Madrid (project TEC-2024/TEC-85)
DS Docta Complutense
RD 18 mar 2026