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International Journal of Phytomedicine and Phytotherapy

Table 3 FTIR spectral peak values and functional groups obtained for ethanol leaf and bark extracts of A. officinalis

From: Pharmacological activities of leaf and bark extracts of a medicinal mangrove plant Avicennia officinalis L.

Wave number (cm− 1)

Assigned functional group

539

torsion and ring torsion of phenyl

600-900

-CH out of plane bending vibrations

1053

C-OH

1233, 1239, 1323, 1338, 1377

C-O stretching vibrations

1401

–OH bending vibrations

1630

=C–H stretching vibrations

1697, 1728

–C=O stretching vibrations

2867, 2941, 2944

Asymmetric –CH2–, symmetric –CH3 and –CH2– stretching vibrations

3455, 3516

Stretching vibration of bonded and non-bonded –O–H groups