Solid state NMR and DFT studies of azo–hydrazone tautomerism in azo dyes and chitosan-dye films
Coral Hillel, Sarah Collins, Amanpreet Parihar, Ozzy Mermut, Christopher J. Barrett, William J. Pietro, Linda Reven
Abstract
The hydrazone form of two azo food dyes, as revealed by NMR with DFT, predominates in solution and solid chitosan films, having important implications for development of these dye-polymer films into light-triggered recyclable bioplastics.
Topics & Concepts
TautomerHydrazoneChemistryIsomerizationMagic angle spinningCarbon-13 NMRPhotochemistryDelocalized electronComputational chemistryNuclear magnetic resonance spectroscopyProton NMRSolventAzobenzenePhysical chemistryOrganic chemistryPolymerCatalysisDye analysis and toxicityDyeing and Modifying Textile FibersPhotochemistry and Electron Transfer Studies