We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Diarylethene-Based Ionic Liquids: Synthesis and Photo-Driven Solution Properties.
- Authors
Soromenho, Mário R. C.; Afonso, Carlos A. M.; Esperança, José M. S. S.
- Abstract
In this work, the design and synthesis of a series of photochromic gemini diarylethene-based ionic liquids (GDILs) with different cationic motifs is reported. Several synthetic pathways were optimized for the formation of cationic GDILs with chloride as the counterion. The different cationic motifs were achieved through the N-alkylation of the photochromic organic core unit with different tertiary amines, including different aromatic amines such as imidazole derivatives and pyridinium, and other non-aromatic amines. These novel salts present surprising water solubility with unexplored photochromic features that broaden their known applications. The covalent attachment of the different side groups dictates their water solubility and differences upon photocyclization. The physicochemical properties of GDILs in aqueous and in imidazolium-based ionic liquid (IL) solutions were investigated. Upon irradiation with ultraviolet (UV) light, we have observed changes in the physico-chemical properties of distinct solutions containing these GDILs, at very low concentrations. More specifically, in aqueous solution, the overall conductivity increased with the time of UV photoirradiation. In contrast, in IL solution, these photoinducible changes are dependent on the type of ionic liquid used. These compounds can improve non-ionic and ionic liquids' solutions since we can change their properties, such as conductivity, viscosity or ionicity, only by UV photoirradiation. The electronic and conformational changes associated with these innovative stimuli GDILs may open new opportunities for their use as photoswitchable materials.
- Subjects
IONIC liquids; DIARYLETHENE; AMINE derivatives; AQUEOUS solutions; PHOTOCYCLIZATION; AROMATIC amines; TERTIARY amines
- Publication
International Journal of Molecular Sciences, 2023, Vol 24, Issue 4, p3533
- ISSN
1661-6596
- Publication type
Article
- DOI
10.3390/ijms24043533