The term Chromotropism is defined as a reversible change in absorption spectra of compounds in different physical or chemical conditions. There are much interest in investigation of chromotropism phenomenon because of its applications in various fields such as thermosensitive, imaging, photo-switching and sensor-materials [1]. Halochromism is an interesting aspect of chromotropism behavior which is related to the color change of a compund when pH changes occur. Amide ligands are an attractive class of ligands that with pH variation their coordination as protonated/deprotonated change through amide oxygen or imine nitrogen [2]. In view of the attractive amide ligand motivated us to prepare, characterize and investigate chromotropism in a complex with a tridentate amide (L) and N3 ligands.
