Silveira, Valentin
- Department of Forest Biomaterials and Technology, Swedish University of Agricultural Sciences
Abstract
The synthesis and drastic chromic properties of a novel phenacyl-substituted bis-viologen are reported. The aforementioned viologen was proved to undergo reversible deprotonation leading to a highly-chromic compound as a result of the pH-dependent activity of the ketone-enolate system that it encompasses. The deprotonation is feasible through inorganic bases such as sodium hydroxide as well as organic bases e.g. diisopropyl ethylamine. The propensity of the viologen to undergo chromic modifications in solution as well as in solid state is examined. In solution, a negative solvatochromic response is observed and for its quantification, a suitable linear solvation energy relationship (LSER) is employed. Finally, the vapochromic response of the title viologen is qualitatively assessed in powder form as well when absorbed on SiO2 plates.
Keywords
Viologens; Chromism; Solvent effects; Solvatochromism; Base-sensing properties; Vapochromism
Published in
Journal of Molecular Liquids
2025, volume: 427, article number: 127401
SLU Authors
Papadakis, Rafail
- Department of Forest Biomaterials and Technology, Swedish University of Agricultural Sciences
- National Technical University of Athens
- Department of Forest Biomaterials and Technology, Swedish University of Agricultural Sciences
UKÄ Subject classification
Physical Chemistry
Publication identifier
- DOI: https://doi.org/10.1016/j.molliq.2025.127401
Permanent link to this page (URI)
https://res.slu.se/id/publ/143301