Lvovska M. Electron structure and spectral properties of 3-hetarylchromones

Investigation objects: 3-tiazolyl- and 3-phenylchromone derivatives. Purpose: Study of 3-tiazolylchromones electron structure, spectral properties and protolytic forms transformation mechanism in the ground and excited states. Methods: absorption and fluorescence spectroscopy stationary and timeresolved, quantum-chemical calculations. The nature of absorption and emission spectra of chromone derivatives has been established. The constants of protolytic equilibriums in the ground and excited states and the protonation mechanism of 3-tiazolylchromones has been determined. The eight possible protolytic forms of 3-thiazolylchromones were considered to exist in the excited state. Only dicationic, monocationic, cation-tautomeric and anionic forms are responsible for the emission. Degree of application: the data obtained could be used for chromone derivatives protolytic forms study for elaboration acid-base indicators and probes on the base of these compounds.