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. 2022 Sep 7;12(9):1395. doi: 10.3390/life12091395

Table 5.

Theoretical interpretation of the IR spectra of the C. vulgaris and A. platensis lipid complexes.

No. C. vulgaris A. platensis Theoretical Interpretation
Wavenumber, cm−1
1 665 - Deformation vibration of the hydroxyl group
2 760 760 Out of plane vibrations of C–H bonds of unsaturated fragments and pendulum vibrations of CH2
3 870 - Vibrations of molecules in the C=CH2 group
4 965 - Stretching vibration of C–C bonds between carbons of CH2 groups and carbons related to unsaturated bonds
5 1065 1070 Stretching vibrations of C–C bonds of chains; C–O–P stretching vibrations
6 1095 1090 Deformation vibrations (angular) of glycerol crosslink
7 1185 1183 Stretching vibrations of C–O glycerol crosslink
8 1225 1224 Wagging vibrations of CH2 groups
9 1283 1258 Deformation vibrations –C–O– bonds
10 1350 - Deformation vibrations of CH3 groups
11 - 1450 Scissoring vibrations of CH2 groups
12 1448 - Deformation vibrations of C–H
13 1474 1450 Scissoring vibrations of CH2 groups
14 1523 1515 Conjugation of two or more –C=C– bonds vibrations of the hydrated carboxyl group
15 1630 1648 Stretching vibrations of C=C bonds
16 2910 2900 Stretching C–H vibrations of CH2 groups
17 3400 3400 Stretching vibrations of the hydroxyl group