Sample

Peak Values (cm⁻¹)

Functional Groups

Quercetin

3280.54

1736.10

1659.05/1603.94

1558.21

1462.39

1238.49/1091.39

930.45/701.95

O-H stretch

C=O stretch

C-C=C symmetric stretch

C-C=C asymmetric stretch

C-H₂ bend

C-O stretch

C-H bend

Cold Water

3276.25

2918.34

1635.20

1546.77

1391.99

1254.88/1047.35

519.83

O-H stretch

H-C-H stretch

C-C=C symmetric stretch

C-C=C asymmetric stretch

C-H₂ bend

C-O stretch

C-H bend

Hot Water

3269.44

2918.62/2850.09

1591.31

1393.16

1034.42

921.16/523.03

O-H stretch

H-C-H stretch

C-C=C symmetric stretch

C-H₂ bend

C-O stretch

C-H bend

Sonication

3263.84

2920.07

1586.96

1391.81

1257.51/1050.98

518.64

O-H stretch

H-C-H stretch

C-C=C symmetric stretch

C-H₂ bend

C-O stretch

C-H bend

Supercritical Fluid

2917.23/2849.51

1737.93

1447.77

1375.60

1228.71/1091.29

986.48/719.59

H-C-H stretch

C=O stretch

CH₂ bend

CH₃ bend

C-O stretch

C-H bend