Schiff base derivatives were synthesized and characterized by NMR spectra, X-ray, mass and CHN analysis. An excitedstateintramolecularprotontransfer (ESIPT) process in hydroxy Schiff base (SB4) has been studied using emission spectroscopy and it was detected that the two distinct ground state isomers of I and II are responsible for the emission. The comparison of the emission wavelength in hydrocarbon