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. 2022 Aug 21;11(8):1623. doi: 10.3390/antiox11081623

Table 5.

FT-IR frequency range and functional groups are present in the extracts of UD, MC, and MK.

S. No. Frequency Range (cm−1) Functional Groups Phytocompounds Identified
UD MC MK
1. 3358.28 3327.40 3307.88 H-bonded, OH stretching Hydroxyl compounds
2. 2923.25 2921.90 2974.04 Asymmetric stretching
–CH(CH2) vibration
Saturated aliphatic Compounds (Lipids)
3. 2853.54 2802.86 2804.74 Symmetric stretching
–CH2(CH2) vibration
Proteins, lipids
4. 1698.70,
1622.77
1601.79 1611.44 C=O stretching vibration Ketone compound
5. 1455.85 1404.99 - C=C-C aromatic ring stretching Aromatic compound
6. 1399.89 - 1396.51 O-H, alcoholic group Phenol or tertiary alcohol
7. - 1271.82 1275.04 CN stretching Aromatic primary amine
8. 1160.88 1174.09 1140.63 Polymeric OH, C-O stretching Cyclic ether
9. 1055.84 1074.42, 1043.61 1044.62 Phosphate ion Phosphate compound
10. - - 877.47 p-O-C stretching Aromatic phosphate
11. 720.06 620.82 659.68 C-Cl stretching Aliphatic chloro compound