Solvatochromic photoluminescence investigation of functional Schiff-bases: A systematic study of substituent effects

In this paper a series of Schiff-bases, synthesized mechanochemically, were studied for their delicate changes in absorption and emission spectra by altering substituents and solvents at different concentrations. UV-vis and photoluminescence of aromatic salicylideneaniline Schiff-base (ASASB) derivatives with substituents ranging from electron donating to electron withdrawing (-CH3,-Cl,-Br, -I,-C(=O)cH(3),-C(=O)OC2H3,-CN), and ring nitrogen containing derivatives were studied in solvents of different dielectric constant (n-hexane, toluene, ethyl acetate, THF, ethanol and methanol). (C) 2017 Elsevier B.V. All rights reserved.