2-(benzimidazol-2-yl)-3-hydroxychromone derivatives: spectroscopic properties and a possibile alternative intramolecular proton phototransfer

D. Svechkarev 1 , G. Karpushina 1 , L. Lukatskaya 1 , and A. Doroshenko 1
  • 1 Institute for Chemistry at Kharkov V.N. Karazin National University, 61077, Kharkov, Ukraine


Three 2-(benzimidazol-2-yl)-3-hydroxychromone derivatives were synthesized. Their spectroscopic and fluorescent properties, due to excited state intramolecular proton transfer (ESIPT) from OH to carbonyl, were studied. Theoretical possibility of an alternative intramolecular H-bonding and experimental evidence for such behavior are discussed.

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