Mohamed H. Elnagdi, Sanaa O. Abdallah, Khadiga M. Ghoneim, Elzeni M. Ebied and Kawser N. Kassab
With a view to extend the tunability range and maximum output of the coumarin series of dyes, 15 new 3-substituted 7-hydroxycoumarins emitting in the blue-green region of the visible spectrum are synthesized, some of which show laser activity.