What absorbs at 1313 cm⁻¹ in an FTIR spectrum?
A band near 1313 cm⁻¹ can point to several functional groups. Below are the most likely assignments, ranked by how much published evidence supports each — every one traceable to literature (DOI) and cross-validated against our 130,000+ reference spectra and knowledge graph.
Backed by 8 cited sources
Réponse rapide
A band near 1313 cm⁻¹ is usually interpreted by checking which functional groups repeatedly co-occur there in the literature, then confirming at least one or two additional peaks in the same sample. This page ranks those assignments by accumulated evidence rather than by a single fixed textbook rule.
Attributions possibles de groupes fonctionnels
| Groupe fonctionnel | Faits à l＇appui | Sources citées | Confiance maximale |
|---|---|---|---|
| N h | 5 | 5 | 1,0 |
| Secondary amine | 4 | 3 | 1,0 |
| Amide | 4 | 3 | 1,0 |
| C-O single bond | 3 | 3 | 1,0 |
| C n single bond | 3 | 2 | 1,0 |
| Methoxy (OCH3) | 2 | 2 | 1,0 |
| Methacrylate | 2 | 2 | 1,0 |
| Acetate | 2 | 2 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
| Ammonium | 1 | 1 | 1,0 |
| Ring structure | 1 | 1 | 1,0 |
| N eq o | 1 | 1 | 1,0 |
| Alkene (C=C) | 1 | 1 | 1,0 |
| Aromatic ring | 1 | 1 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| N c o | 1 | 1 | 1,0 |
| C c single bond | 1 | 1 | 0,8 |
Le classement reflète les preuves bibliographiques accumulées, et non une règle faisant autorité. Confirmez toujours dans le contexte de votre échantillon.
Matériaux possibles
| Matériel | Pics de support | Groupes chevauchants | Sources citées |
|---|---|---|---|
| saliva | 1313, 1648, 1664 | Amide, C-O single bond | 1 |
| hydrogel | 1313, 1632, 1062 | Amide, N h | 1 |
Les matériaux sont affichés uniquement lorsque le même ensemble de littérature soutient cette bande et au moins un pic caractéristique supplémentaire.
Logique du spectre
This band becomes meaningful only when read with its neighboring peaks. In practice, analysts first look at the assignments above, then check whether the same sample also shows other peaks expected for the same structural motif. A lone band near 1313 cm⁻¹ is usually not enough for material identification by itself.
Utilisation réelle
Ce type de requête est courant dans l＇identification des polymères, le criblage des plastiques inconnus, le dépannage du contrôle qualité, la vérification des matériaux recyclés et l＇examen de l＇attribution des pics appuyée par la littérature.
Erreurs courantes
- Traiter une bande isolée comme preuve d＇un matériau sans vérifier au moins un ou deux pics de support.
- Ignorer le chevauchement : plusieurs groupes fonctionnels peuvent contribuer près du même nombre d＇onde.
- Sauter la validation lorsque des additifs, des mélanges, l＇oxydation ou la contamination peuvent déformer le spectre.
Conseil de vérification
Lorsque l＇ambiguïté persiste, validez l＇hypothèse avec DSC, GC-MS ou TGA, en particulier pour les mélanges, les échantillons dégradés et les polymères chargés.
Bibliographie derrière ces attributions
-
confiance 1,0
“The peak observed at 1313 is due to the presence of N-H vibration.”
Rajendra 等 - 2018 - Luminescence properties of dysprosium doped YVO4 p DOI: 10.1016/j.jre.2018.07.001 -
Amide confiance 1,0
“amide III band (1313 which contains information C-N C-O N-H Based on this work, however, spectral analysis of the regarding the and stretching and the and cm-1”
Shi 等 - 2018 - Biochemical alterations of Candida albicans during DOI: 10.1039/c8an01452c -
C-O single bond confiance 1,0
“cm-1 Pure PVA absorption maxima at 1313 and 1410 have been ascribed to C-OH cm-1 Pure PVA absorption maxima at 1313 and 1410 cm-1 have been ascribed to C-OH plane bending and CH wagging, respectively [35].”
Innovative Green Chemistry Approach to Synthesis of Sn2+-Metal Complex and Design of Polymer Composites with Small Optical Band Gaps DOI: 10.3390/molecules27061965 -
Amide confiance 1,0
“methyl groups of proteins (1452 amide III band components of proteins (1313 cm-1) mannose-6-phosphate and phosphorylated saccharide residue (1120 and C conforma2”
Salivary molecular spectroscopy: A sustainable, rapid and non-invasive monitoring tool for diabetes mellitus during insulin treatment DOI: 10.1371/journal.pone.0223461 -
Aromatic ring confiance 1,0
“The appearance of characteristic cm-1 tions of sulfanilamide aromatic ring C=C bond, two high intensity, sharp bands at 1313 bands in the spectrum of hydrogel with incorporated sulfanilamide at 1599 and cm-1, and 1154 cm-1, originating from”
Modified Sulfanilamide Release from Intelligent Poly(N-isopropylacrylamide) Hydrogels DOI: 10.3390/pharmaceutics15061749 -
Acetate confiance 1,0
“FTIR and NMR analysis cm-1 cm-1 2DCTZ showed bands at 3310 (N-H broad stretches), 2531 The FTIR data of H 1710cm-1 1313cm-1(C-O cm-1 (COOH stretch), (C=O stretch), stretch), 1320, 1197 (=C-N), cm-1 [Error! Bookmark not defined.].”
Jaiswal 等 - 2015 - Protective properties of functionalised tetrazine DOI: 10.1016/j.matchemphys.2015.07.029 -
N eq o confiance 1,0
“The peaks at 1490 and 1313 cm-1 are attributed to the N=O stretching vibrations of the coordinated nican be assigned to Zntrate group and the nitrate ion, respectively.”
Deposition of Zinc Oxide Coatings on Wood Surfaces Using the Solution Precursor Plasma Spraying Process DOI: 10.3390/coatings11020183 -
Ring structure confiance 1,0
“cm-1 The C-C and C-N ring stretching bands were moved to 1380 and 1308 cm-1 for U(VI) and 1738, 1420, 1378, and 1313 for Th(IV), whereas, the ring bending vibration was shifted to 817 for U(VI) cm-1 1378, and 1313 cm-1 for Th(IV), whereas,”
Salah 等 - 2019 - The Removal of Uranium and Thorium from Their Aque DOI: 10.3390/min9100626
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