Table 1.
Vibrational bands and their assignments for spectra collected from leaves and seeds of peanuts.
| Band (cm−1) | Vibrational mode | Assignment |
|---|---|---|
| 480 | C-C-O and C-C-C Deformations; Related to glycosidic ring skeletal deformations δ(C-C-C) + τ(C-O) Scissoring of C-C-C and out-of-plane bending of C-O | Carbohydrates22 |
| 520 | ν(C-O-C) Glycosidic | Cellulose23 |
| 747 | γ(C–O-H) of COOH | Pectin24 |
| 849–853 | (C6–C5–O5–C1–O1) | Pectin25 |
| 917 | ν(C-O-C) In plane, symmetric | Cellulose, phenylpropanoids23 |
| 964–969 | δ(CH2) | Aliphatics26,27 |
| 1000–1005 | In-plane CH3 rocking of polyene aromatic ring of phenylalanine | Carotenoids28; protein |
| 1048 | ν(C-O) + ν(C-C) + δ(C-O-H) | Cellulose, phenylpropanoids23 |
| 1080 | ν(C-O) + ν(C-C) + δ(C-O-H) | Carbohydrates22 |
| 1115–1119 | Sym ν(C-O-C), C-O-H bending | Cellulose23 |
| 1155 | C-C Stretching; v(C-O-C), v(C-C) in glycosidic linkages, asymmetric ring breathing | Carotenoids28,carbohydrates29 |
| 1185 | ν(C-O-H) Next to aromatic ring + σ(CH) | Phenylpropanoids30,31 |
| 1218 | δ(C-C-H) | Aliphatics26, xylan30 |
| 1265 | Guaiacyl ring breathing, C-O stretching (aromatic); -C=C− | Phenylpropanoids32, unsaturated fatty acids19 |
| 1286 | δ(C-C-H) | Aliphatics26 |
| 1301 | δ(C-C-H) + δ(O-C-H) + δ(C-O-H) | Carbohydrates22,33 |
| 1327 | δCH2 Bending | Aliphatics, cellulose, phenylpropanoids23 |
| 1339 | ν(C-O); δ(C-O-H) | Carbohydrates22 |
| 1387 | δCH2 Bending | Aliphatics26 |
| 1443–1446 | δ(CH2) + δ(CH3) | Aliphatics26 |
| 1526 | -C=C- (in plane) | Carotenoids34,35 |
| 1606–1632 | ν(C-C) Aromatic ring + σ(CH) | Phenylpropanoids36,37 |
| 1654–1660 | -C=C-, C=O Stretching, amide I | Unsaturated fatty acids19, proteins34 |
| 1682 | COOH | Carboxylic acids |
| 1748 | C=O Stretching | Esters, aldehydes, carboxylic acids and ketones38 |
Identification of nematode resistance and Raman-based selection for high O/L ratios.