Synthesis, characterization and investigation of solvatechromic behavior of novel oxovanadium(IV) complexes derived from Schiff base ligands

This project describes the synthesis, characterization and investigation of solvatechromic behavior of novel oxovanadium(IV) complexes containing tetradentate N4 type Schiff base ligands derived from condensation of 1,2-ethylenediamine, meso-1,2-diphenyl-1,2-ethylenediamine and 1,3- propanediamine with 2-pyridinecarbaldehyde. All of the ligands (L1, L2 and L3) and complexes (VOL1, VOL2 and VOL3) were synthesized according to the well-known literature procedure and were characterized with IR, 1HNMR, UV-Vis methods. The novel VOL1, VOL2 and VOL3 complexes were obtained with (V=O) stretching band about 960-980 cm-1. All of the complexes characterized in monomeric structure. The complex VOLx (X = 1, 2 and 3) is considerably soluble in a wide variety of solvents and shows solvatochromic behavior. The 2B2 2E(I) transition wavenumber shows a linear correlation to the D.N. of the solvents.