| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 2027821 | Steroids | 2015 | 8 Pages |
•A bile acid–picolinic acid conjugate forms gels with Cu2+ ions in aqueous solvents.•These gels are responsive to mechanical and chemical stimuli.•The systems undergo reversible redox-responsiveness combined with phase transitions.•NMR proves pyridine moiety’s essential role in chelating the Cu2+ ions in the gels.•MS and SEM are used in further characterization the systems.
The synthesis and gelation properties of a picolinic acid conjugated bile acid derivative in the presence of metal salts along with the stimuli-responsiveness of the systems are reported. The gels are formed in the presence of Cu2+ ions in the solvent systems composed of 30–50% of organic solvent (MeOH, acetonitrile, or acetone) in water. The gels respond to various stimuli: they can be formed upon sonication or shaking, and their gel–sol transformation can be triggered by a variety of chemical species. NMR, MS, and SEM techniques are exploited in order to gain a deeper insight on the self-assembled systems.
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