Table 6 Functional groups in EPSs produced by F. nygamai strain AJTYC1
Wave number (cm_1) | Functional groups | Name of group |
|---|---|---|
3383.7 | -OH stretch | Hydroxyl |
2971.2 | O–H stretch | Carboxylic acid |
2937.3 | CH2-CH3 stretch | Aliphatic alkyl |
2916 | -CH3 stretch | Methyl |
25503 | S–H stretch | Thiol |
2365.1 | RCOH stretch | Aldehyde |
2093.8 | R-COOH | Carboxylic |
1710 | C = O | Carboxyl |
1495.7 | N–O stretch | Nitro |
1457.9 | C–N stretch and N–H bending | Amide III |
1358 | CH2-CH3 | Aliphatic alkyl |
1327.5 | PO3 stretch | Phosphate |
1299 | S = O stretch | Sulfone |
1249 | O–H | Phenol |
1152.5 | C–O | Ether or alcohol |
1104.4 | C–O–C stretch | Epoxy |
956.09 | C–C, C = C, C–O–C, and C–O–P | Polysaccharides |
915.11 | C–O–C | Glycoside |
837.17 |  | α-anomeric |
532.76 | NO2 stretch | Nitro |