Chitosan — FTIR absorption peaks and assignments
These are the characteristic FTIR wavenumbers where Chitosan tends to absorb, compiled from published literature and ranked by supporting evidence. Each assignment is traceable to a source (DOI) and cross-validated against our 130,000+ reference spectra and knowledge graph.
Backed by 8 cited sources
Réponse rapide
Chitosan is usually assigned by looking for a recurring cluster of characteristic peaks rather than one exact textbook number. The table below shows where the literature most often places this group in FTIR, ranked by accumulated evidence.
Characteristic FTIR peaks for Chitosan
| Nombre d＇onde (cm⁻¹) | Faits à l＇appui | Sources citées | Confiance maximale |
|---|---|---|---|
| 1655 | 4 | 4 | 1,0 |
| 1080 | 3 | 3 | 1,0 |
| 1642 | 3 | 2 | 1,0 |
| 1630 | 3 | 2 | 1,0 |
| 1062 | 2 | 2 | 1,0 |
| 1151 | 2 | 2 | 1,0 |
| 1610 | 2 | 2 | 1,0 |
| 1650 | 2 | 2 | 1,0 |
| 2800 | 2 | 2 | 1,0 |
| 3354 | 2 | 2 | 1,0 |
| 3000 | 2 | 2 | 1,0 |
| 1654 | 2 | 1 | 1,0 |
| 1452 | 1 | 1 | 1,0 |
| 2928 | 1 | 1 | 1,0 |
| 1012 | 1 | 1 | 1,0 |
| 1195 | 1 | 1 | 1,0 |
| 1106 | 1 | 1 | 1,0 |
| 1375 | 1 | 1 | 1,0 |
| 1705 | 1 | 1 | 1,0 |
| 2850 | 1 | 1 | 1,0 |
| 1633 | 1 | 1 | 1,0 |
| 1064 | 1 | 1 | 1,0 |
| 2874 | 1 | 1 | 1,0 |
| 1071 | 1 | 1 | 1,0 |
| 1148 | 1 | 1 | 1,0 |
| 3846 | 1 | 1 | 1,0 |
| 1230 | 1 | 1 | 1,0 |
| 3448 | 1 | 1 | 1,0 |
| 1000 | 1 | 1 | 1,0 |
| 520 | 1 | 1 | 1,0 |
Showing the 30 best-supported peaks of 149 total for Chitosan.
Logique du spectre
Une attribution de groupe fonctionnel devient plus fiable lorsque plusieurs bandes attendues apparaissent ensemble. Utilisez cette page pour trouver les pics les mieux soutenus, puis confirmez que le même échantillon présente un motif cohérent plutôt qu＇un seul hit isolé.
Utilisation réelle
Ces pages sont utiles pour l＇analyse de matériaux inconnus, l＇explication des pics dans les rapports, le dépannage des polymères et la vérification de la plausibilité chimique d＇une famille de matériaux candidate.
Erreurs courantes
- Utiliser une page de groupe fonctionnel comme verdict complet du matériau sans vérifier le reste du spectre.
- En supposant que la bande la plus forte est toujours la plus diagnostique.
- Oublier que le traitement, les additifs, le vieillissement et les mélanges peuvent décaler ou élargir les pics attendus.
Conseil de vérification
Utilisez DSC, GC-MS ou TGA lorsque plusieurs familles de matériaux partagent des bandes similaires ou lorsque les effets de mélange rendent l＇attribution FTIR incertaine.
Bibliographie derrière ces attributions
-
2361 cm⁻¹ confiance 1,0
“A signal at 1737 on chitosan spectrum was attributed to the carboxylic (C=O) groups T 2361cm-1 overlapped by MPEO incorporation.”
Mentha piperita essential oils loaded in a chitosan nanogel with inhibitory effect on biofilm formation against S. mutans on the dental surface DOI: 10.1016/j.carbpol.2019.02.018 -
2071 cm⁻¹ confiance 1,0
“3(b) that the introcm-1 the contact ion-pairs, the band at 2071 is attributed to the duction of the phthalimido group into the chitosan backbone has 2033cm-1 reflection triple ion aggregates and the band at is assigned to the disrupted the”
Synthesis and characterizations of phthaloyl chitosan-based polymer electrolytes DOI: 10.1016/j.jnoncrysol.2012.04.019 -
2908 cm⁻¹ confiance 1,0
“The peak at 2908.04 corresponded to cm(cid:2)1 Chitosan film CeH the stretching, while the band at 1335.74 was OeH the of water.”
Bourtoom 和 Chinnan - 2008 - Preparation and properties of rice starch-chitosan DOI: 10.1016/j.lwt.2007.10.014 -
2878 cm⁻¹ confiance 1,0
“The band at cm(cid:1)1 gelthestraincurvedisplaysajumpofthestrainvalueinresponse of chitosan corresponding to the C-H vibration, is 2878 OF cm(cid:1)1”
Chakraborty 等 - 2012 - Improved mechanical and photophysical properties o DOI: 10.1039/c2jm33995a -
3000 cm⁻¹ confiance 1,0
“Because the concentrated acids clean samples from any bands above 3000 are related to the overlap of the stretching impurity, which give chitosan more opportunities for recrystallization vibration of the OH and NH bonds [35, 36].”
A comparison of chitosan properties after extraction from shrimp shells by diluted and concentrated acids DOI: 10.1016/j.heliyon.2020.e03486 -
3438 cm⁻¹ confiance 1,0
“Figure 1C, for the hybrid brid chitosan-CuO nanocomposite, showed the noisy shape with the presence of the broad chitosan-CuO nanocomposite, showed the noisy shape with the presence of the broad band at 3438 cm-1 and the two characteristic”
Chitosan Capped Copper Oxide Nanocomposite: Efficient, Recyclable, Heterogeneous Base Catalyst for Synthesis of Nitroolefins DOI: 10.3390/catal12090964 -
3426 cm⁻¹ confiance 1,0
“Based on the FTIR spectra of the cm-1 chitosan membrane in Figure 2 showed that it has a wide absorption at 3425.58 that indicates the cm-1 vibration stretching -OH group.”
Hastuti 和 Assya'adha - 2020 - Synthesis and Characterization of Chitosan Membran DOI: 10.1088/1757-899X/833/1/012068 -
3621 cm⁻¹ confiance 1,0
“FTIR spectrum presented significant peaks at 3621 1013 was attributed to chitosan, Accepted: 11October2022 cm-1 29Si, 27Al, 13H and 787 signified the stretching of Si-O-Si on HNT.”
Synthesis and Optimization of Superhydrophilic-Superoleophobic Chitosan–Silica/HNT Nanocomposite Coating for Oil–Water Separation Using Response Surface Methodology DOI: 10.3390/nano12203673
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