“…Photochromic compounds are important because of their use as optical switches and optical memories, variable electrical current, ion transport through membrane. In addition, they have widespread usage as ligands in the field of coordination chemistry as well as in diverse fields of chemistry and biochemistry owing to their biological activities [32][33][34]. Thermochromism and photochromism in Schiff base are related to tautomerism, molecular geometry (planar and nonplanar, respectively) and crystal packing of the crystal [32,35,36].…”