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Table 5 FT-IR peaks of Pterocarpus marsupium-loaded chitosan nanoparticles and their respective assigned functional groups

From: Pterocarpus marsupium Roxb. heartwood extract synthesized chitosan nanoparticles and its biomedical applications

S. No.

FT-IR peaks in PM-CNPs (cm−1)

Functional groups

1.

3402.54

Presence of hydroxyl bond

2.

2924.18

Stretching vibrations of CH3 and CH2

3.

1639.55

Presence of C=O stretch in an amide bond

4.

1464.02

CH3 and CH2 deformations

5.

1377.22

Symmetrical bending of CH3

6.

1149.01

Presence of P=O peak

7.

1047.36

Stretching vibration of –C–O–