Synthesis, characterization, nucleic acid interaction and photoluminescence properties of (E)-(2-(2-hydroxybenzylidene) hydrazinyl)(pyridin-4-yl)methaniminium Mn(II), Co(II), Ni(II), Cu(II) and Zn(II) complexes

摘要

Five new metal complexes ML2 [Where, M = Mn(II), Co(II), Ni(II), Cu(II) and Zn(II) and L is (E)-(2-(2-hydroxybenzylidene)hydrazinyl)(pyridin-4-yl)methaniminium)] have been synthesized and characterized by elemental analysis, molar conductivity, magnetic moment and spectroscopy (UV-Vis, FT-IR and ESR) studies. The spectral data showed that ligand is tridentating coordination through azomethine nitrogen, methaniminium nitrogen and phenolic oxygen. DNA binding studies of transition metal complexes 1-5 were examined by electronic absorption spectroscopic techniques. All the metal complexes 1-5 have shown hypochromism. Photoluminescence activity of ligand L and its metal complexes 1-5 were carried out. The ligand L showed weak emission in pi-pi* and n -pi* excitation. The complexes 1, 2 and 4 didn't exhibited noticeable emission in three different excitation, complex 3 showed enhanced emission in pi -pi* and n -pi* excitation and complex 5 showed enhanced emission in LMCT. (C) 2018 Elsevier B.V. All rights reserved.