Luminescent assemblies of pyrene-containing bent-core mesogens: liquid crystals, p-gels and nanotubes

Martínez-Abadía, Marta ; Varghese, Shinto ; Gierschner, Johannes ; Giménez, Raquel ; Ros, M. Blanca (Universidad de Zaragoza)

Resumen: Bent-shaped molecules incorporating terminal pyrene moieties were designed and synthesized aiming at promoting a variety of luminescent self-assembled materials. The novel compounds are fluorescent both in solution and in condensed phases, achieving brighter fluorescence in the last case with fluorescence quantum yields up to 60%. Depending on the number of pyrene units (1 or 2) and/or the presence or absence of a long and flexible linker between the bent-core and the pyrene structures, bent-core liquid crystal phases, physical gels and nanoassemblies were obtained. Their properties depend on the molecular design, unveiling a synergistic and versatile ''tandem'' of the bi-functional system in supramolecular functional materials chemistry. Long hydrocarbon spacers connecting bent-core and pyrene structures were necessary to display mesomorphic properties, achieving monotropic rectangular columnar mesophases, being for one compound stable at room temperature and displaying a glassy transition below room temperature, as revealed by POM, DSC and XRD. Liquid crystal phases exhibited excimer-like emission. In addition, organogels were obtained without the help of hydrogen bonding functionalities, exhibiting in one case supergelator behavior. Different nanoassemblies were obtained from these non-amphiphilic bent-core structures, in particular unprecedented organic nanotubes with beveled ends formed by a single bilayer. © 2022 The Royal Society of Chemistry.

Idioma: Inglés

DOI: 10.1039/d2tc02546a

Año: 2022

Publicado en: JOURNAL OF MATERIALS CHEMISTRY C 10 (2022), 12012-12021
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/E47-20R
Financiación: info:eu-repo/grantAgreement/ES/MCIU-FEDER/PGC2018-093761-B-C31
Financiación: info:eu-repo/grantAgreement/ES/MINECO-FEDER/MAT2015-66208-C3-1

Tipo y forma: Artículo (PostPrint)

Área (Departamento): Área Química Orgánica (Dpto. Química Orgánica)