Fluorescence Study of Zn(II) Complexes with Salophen-Type Ligands

Transition metal complexes with salophen type ligand have attracted enormous attention in coordination chemistry due to their structural liability, unusual configuration and sensitivity towards environment as a functional material [1-3]. They are known to act as an excellent candidate as a luminescent material with possible utilization in solar energy conversion, luminescent sensors, electroluminescent sensors and probes for biological systems [4]. The source of their luminescence is due to the metal to ligand charge transfer (MLCT) excited state, which is usually sensitive to molecular configuration and peripheral ligand. Herein, we investigate the fluorescent properties of two new chloro and bromo salophen ligands and their Zn(II) complexes. The results show the emission of complexes shift to higher wavelengths in comparison with the ligands and about complexes, the emission decreases in intensity.