PREPARATION, CHARACTERIZATION, ANTIBACTERIAL EVALUATION, LASER ACTIVITY, MOLECULAR DOCKING, AND LIQUID CRYSTALLINITY STUDIES OF NEW TETRAZOLE DERIVATIVES

In this study, the sublimation technique was employed to react equimolar amounts of Schiff base derivatives with sodium azide in the presence of DMSO as a solvent for 21 –22 hours. The result is a synthesis of five-membered tetrazole derivatives. Physical and spectroscopic techniques, including infrared, proton and carbon nuclear magnetic resonance, validated the compounds’ structures, and UV -Vis spectroscopy. Thin-layer chromatography (TLC) was used to monitor the reaction progress and identify the melting points and purities. Two bacterial isolates, one Gram-positive (Staphylococcus aureus) and one Gram-negative (Escherichia coli), were examined to determine how certain chemicals they produced affected their growth. Some of the produced compounds had good inhibitory action against the tested microorganism s. At a dosage of 0.1 mg/ml and an inhibition diameter of 1.7 cm, compound N 6 exhibited the maximum inhibition, surpass ing the antibiotic’s efficiency. With an inhibition diameter of 3.6 cm at a dose of 0.1 mg/ml, compound N 10 had the strongest inhibitory action against Escherichia coli bacteria, surpassing the antibiotic in all experiments. The antibiotic ciprofloxacin was employed as a control. Furthermore, the prepared compounds were exposed to neodymium nano-laser radiation. The compounds demonstrated high stability toward the radiation. Molecular modelling was performed using the AUTODOCK software package for N 6 against S. aureus and N10 against E. coli. It appears that tetrazole is linked via the NH group with amino acid residue B: GLY:114, forming hydrogen bonds with an affinity value of (-9.9 kcal/mol) and a conformational value of RMSD.i.b (4.721) and RMSD.u.b (8.679). The textures of some of the prepared compounds [N6, N8] were studied using a polarizing microscope.