Flavylium Salts A Blooming Core for Bioinspired Ionic Liquid Crystals

Robert Forschner 1 Jakob Knelles 1 Korinna Bader 1 Carsten Müller 1 Wolfgang Frey 1 Andreas Köhn 1 Yann Molard 2, 3 Frank Giesselmann 1 Sabine Laschat 1
1 Universität Stuttgart [Stuttgart]
2 ISCR - Institut des Sciences Chimiques de Rennes
3 ScanMAT - Synthèse Caractérisation Analyse de la Matière
Abstract : Thermotropic ionic liquid crystals based on the flavylium scaffold have been synthesized and studied for their structure-properties relationship for the first time. The mesogens were probed by differential scanning calorimetry (DSC), polarizing optical microscopy (POM), and X-ray diffraction (XRD). Low numbers of alkoxy side chains resulted in smectic (SmA) and lamello-columnar (Lam ) phases, whereas higher substituted flavylium salts showed Col as well as ordered and disordered columnar (Col , Col ) mesophases. Mesophase width ranged from 13 K to 220 K, giving access to room temperature liquid crystals. The optical properties of the synthesized compounds were probed towards absorption and emission properties. Strong absorption with maxima between 444 and 507 nm was observed, and some chromophores were highly emissive with quantum yields up to 99 %. Ultimately, mesogenic and dye properties were examined by temperature-dependent emissive experiments in the solid state.
Keywords : UV/Vis spectroscopy X-ray diffraction fluorescence ionic liquid crystals self-assembly
Document type :
Journal articles
Complete list of metadatas
https://hal-univ-rennes1.archives-ouvertes.fr/hal-02308468
Contributor : Laurent Jonchère <>
Submitted on : Tuesday, October 8, 2019 - 3:16:00 PM
Last modification on : Tuesday, November 12, 2019 - 5:02:59 PM

Links full text

openaccess

Identifiers

Collections

UNIV-RENNES1 | SCANMAT | INC-CNRS | ISCR | UNIV-RENNES | INSA-GROUPE | UR1-UFR-SPM

Citation

Robert Forschner, Jakob Knelles, Korinna Bader, Carsten Müller, Wolfgang Frey, et al.. Flavylium Salts A Blooming Core for Bioinspired Ionic Liquid Crystals. Chemistry - A European Journal, Wiley-VCH Verlag, 2019, 25 (56), pp.12966-12980. ⟨10.1002/chem.201901975⟩. ⟨hal-02308468⟩

Export

BibTeX TEI DC DCterms EndNote

Share

Metrics

Record views

7