Dual liquid Crystalline/Gel behavior with AIE effect promoted by Self-assembly of pyrazole dendrons

Iguarbe, Verónica (Universidad de Zaragoza) ; Romero, Pilar ; Barberá, Joaquín (Universidad de Zaragoza) ; Elduque, Anabel (Universidad de Zaragoza) ; Giménez, Raquel

Resumen: This work describes the rich self-assembly behavior obtained by grafting a pyrazole-derived platform at the focal point of poly(benzyl ether) dendrons. Liquid crystals and supergels made out of fibers are obtained by supramolecular organization of non-discoid entities, and they notably increment the photoluminescence in these aggregated states (Aggregation-Induced Emission, AIE). The novel focal point, which is derived from 3,5-dimethyl-4-phenyl-1H-pyrazole, shows great tendency to arrange both wedge-shaped or cone-shaped dendrons in columnar arrangements by the formation of supramolecular polymers by hydrogen-bonding following the cylinder model. Two different linkers, amide or ether groups, connecting with the pyrazole-based apex are investigated, obtaining similar mesomorphic behavior, but different luminescent properties. A combined study of NMR, IR and X-ray diffraction allows establishing analogies between the fiber mesoscopic organization and the columnar organization in the liquid crystalline phase.

Idioma: Inglés

DOI: 10.1016/j.molliq.2022.120109

Año: 2022

Publicado en: Journal of Molecular Liquids 365 (2022), 120109 [9 pp.]
ISSN: 0167-7322

Factor impacto JCR: 6.0 (2022)

Categ. JCR: PHYSICS, ATOMIC, MOLECULAR & CHEMICAL rank: 4 / 35 = 0.114 (2022) - Q1 - T1
Categ. JCR: CHEMISTRY, PHYSICAL rank: 50 / 161 = 0.311 (2022) - Q2 - T1

Factor impacto CITESCORE: 9.7 - Materials Science (Q1) - Chemistry (Q1) - Physics and Astronomy (Q1)

Factor impacto SCIMAGO: 0.914 - Atomic and Molecular Physics, and Optics (Q1) - Condensed Matter Physics (Q1) - Spectroscopy (Q1) - Materials Chemistry (Q1) - Physical and Theoretical Chemistry (Q1) - Electronic, Optical and Magnetic Materials (Q1)

Financiación: info:eu-repo/grantAgreement/ES/AEI/PID2020-119512GB-I00
Financiación: info:eu-repo/grantAgreement/ES/DGA/E47-20R
Financiación: info:eu-repo/grantAgreement/ES/DGA/E50-20D
Financiación: info:eu-repo/grantAgreement/ES/MCIU-FEDER/PGC2018-093761-B-C31
Financiación: info:eu-repo/grantAgreement/ES/MCIU-FEDER/PGC2018-097583-B-I00

Tipo y forma: Article (Published version)

Área (Departamento): Área Química Inorgánica (Dpto. Química Inorgánica)
Área (Departamento): Área Química Orgánica (Dpto. Química Orgánica)
Área (Departamento): Proy. investigación HZE (Dpto. Química Orgánica)