Fig. 9.

FT-IR spectrum analysis of Phenazine like compound from P. aeruginosa VSMKU1.A - functional groups present in pure phenazine compound while B showing the FTIR spectrum of Phenazine like compound exhibiting absorption at 3325.39 cm⁻¹ and 2935.76 cm⁻¹ with functional groups, particularly C-H aromatic stretch, NH amine stretch, and CH alkene stretch. At 1666.55cm⁻¹, 1651.12cm⁻¹, 1643.41cm^−1, and 1452.45cm⁻¹ displayed the functional groups a C=C alkene stretch, a C=O carboxylic acid group, an amide stretch with a strong bond, and an α, β unsaturated ketone with a strong bond. The spectra absorption values at 1332.86cm⁻¹, 1313.57cm⁻¹, 1111.03cm⁻¹ and 1043.52cm⁻¹ indicated the presence of C-N amine stretch groups. The absorption value at 1240.27 cm⁻¹ indicated a C-O carbonyl acid with strong intensity.