Multi-response gelation based on the molecular assembly of Sudan I dye derivatives for phase selective gelators and chemosensors

Sudan I dye-based smart low molecular weight gelators with/without a perfluoroalkyl group have been successfully synthesized and characterized by rheological measurements, scanning electron microscopy (SEM), IR, and NMR spectroscopies. The gelation behaviors in response to temperature, pH changes, metal cations, and UV-vis light irradiation are investigated. Compounds 1 and 2 could selectively sense the Cu2+ cation in the presence of other metal cations. Moreover, compound 2 with a perfluoroalkyl group shows phase selective gelation ability. This work also provides a valuable reference for exploiting photosensitive materials as chemosensors.

Automated summary

Sudan I dye-based smart low molecular weight gelators with/without a perfluoroalkyl group were synthesized and studied for their gelation behaviors under various conditions such as temperature, pH changes, metal cations, and UV-vis light irradiation. Compounds 1 and 2 showed selective sensing of the Cu2+ cation in the presence of other metal cations. Compound 2, with a perfluoroalkyl group, exhibited phase selective gelation ability. This research provides valuable insights for the development of photosensitive materials as chemosensors.