Table 2.
Band assignments in the Raman spectra of the data sets from tissue sections of cucumber root, stem, and leaves according to refs [3,8,22,23,24,25,26,27].
| Band Position [cm−1] | Tentative Assignment to Molecule |
|---|---|
| 901 | δ(HCC) and δ(HCO) at C-6, cellulose |
| 927 | ω(CCH), lignin; |
| 983 | ν(CC) and ν(CO), cellulose |
| 1005 | ν3 Methyl rocking, carotenoid |
| 1059 | ν(CC) and ν(CO), cellulose |
| 1092 | ν(CC) and ν(CO), cellulose |
| 1136 | ν(CC) and ν(CO), cellulose |
| 1156 | ν2 C-C, carotenoid |
| 1271 | Aryl-O of Aryl-OH and Aryl-O-CH3; guaiacylring mode (with CO-group)), lignin |
| 1337 | δ(HCC) and δ(HCO) cellulose |
| 1376 | δ(HCC) and δ(HCO), and δ(HOC), cellulose |
| 1426 | δ(O-CH3), δ(CH2), guaiacyl ring, lignin |
| 1461 | δ(O-CH3), CH2 scissoring, guajacyl ring (with C=O group), lignin; δ(HCH) and δ(HOC), cellulose |
| 1509 | νas(Aryl ring), lignin |
| 1523 | ν1 C=C, carotenoid |
| 1598 | νs(Aryl-Ring), lignin |
| 1621 | νconj.(Ring C=C) of coniferylaldehyde, lignin |
| 1658 | νconj.(Ring C=C) of coniferylalcohol, ν(C=O) of coniferylaldehyde, lignin |
Abbreviations: ν, stretching vibration; δ, deformation vibration; ω, wagging; s, symmetric; as, antisymmetric; conj., conjugated.