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Anion-responsive diguanidinium-based chiral organogelators
Julián Valero1, Beatriu Escuder, Juan F Miravet
1Institut Català d'Investigació Química (ICIQ), Avinguda Països Catalans, 16, 43007, Tarragona, Spain.
Chiral bicyclic diguanidinium chloride forms gels in aromatic solvents. These gels respond to anionic stimuli, enabling reversible control over organic-phase gelation with aqueous salt solutions.
Area of Science:
- Supramolecular Chemistry
- Materials Science
Background:
- Chiral molecules can self-assemble into complex structures.
- Gelation is a critical phenomenon in materials science and chemistry.
Purpose of the Study:
- To investigate the gelation properties of a chiral bicyclic diguanidinium chloride.
- To characterize the structure and responsiveness of the resulting gels.
Main Methods:
- Microscopy (SEM, TEM)
- Spectroscopy (CD)
- Powder X-ray Diffraction (PXRD)
- Gelation studies in aromatic apolar solvents
Main Results:
- The chiral bicyclic diguanidinium chloride forms gels in aromatic apolar solvents.
- Characterization revealed organization from macroscopic to molecular levels.
- Chirality significantly influences gel properties, confirmed by CD and electron microscopy.
- The gels exhibit responsiveness to anionic stimuli, allowing reversible gelation control.
Conclusions:
- Chiral diguanidinium chloride is a versatile gelator.
- The gelation process is tunable via anionic stimuli.
- This system offers potential for responsive materials and controlled release applications.
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