What absorbs at 1572 cm⁻¹ in an FTIR spectrum?
A band near 1572 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 1572 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 | 5 | 5 | 1,0 |
| Amide | 4 | 4 | 1,0 |
| Ring structure | 3 | 3 | 1,0 |
| Carboxyl (COOH) | 3 | 3 | 1,0 |
| Aromatic ring | 2 | 2 | 1,0 |
| C n single bond | 2 | 2 | 1,0 |
| Nitrogen heterocycle | 2 | 1 | 1,0 |
| N-O bond | 2 | 1 | 1,0 |
| Chitosan | 1 | 1 | 1,0 |
| C c single bond | 1 | 1 | 1,0 |
| C=n | 1 | 1 | 1,0 |
| Carbonate | 1 | 1 | 1,0 |
| Amine primary | 1 | 1 | 1,0 |
| Ammonium | 1 | 1 | 1,0 |
| Alkene (C=C) | 1 | 0 | 1,0 |
| Carbonyl (C=O) | 1 | 0 | 1,0 |
| Chlorine | 1 | 0 | 1,0 |
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 |
|---|---|---|---|
| polysaccharide | 1572, 1637, 1320 | N h, Amide | 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 1572 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
-
N h confiance 1,0
“The intense absorption 3 cm-1 cm-1 bands at 1572 and 823 are due to the asymmetric deformation and rocking NH+ cm-1 vibrations of 3.”
Crystal Growth, Spectral, Optical, Laser damage, Photoconductivity and Dielectric Properties of Semiorganic L-cystine hydrochloride Single Crystal DOI: 10.1016/j.saa.2015.06.113 -
Amide confiance 1,0
“Characterization and differentia1273, 1195, 1141 and are staple assigned to the bendNAH CAN tionofthetwopathovarswereperformedbasedontheaveragesecing and stretching (Amide II), the prominent peak cenNAO 1572cm(cid:3)1 ond derivative FTIR sp”
Differentiation in MALDI-TOF MS and FTIR spectra between two pathovars of Xanthomonas oryzae DOI: 10.1016/j.saa.2014.06.056 -
N-O bond confiance 1,0
“is Thepeakat1572cm(cid:1)1namelyaprimaryinplanevibrational N-O assigned to asymmetric stretching vibration of bond in Licence.”
Yahya 等 - 2019 - Interaction and thermal studies on graphene oxide DOI: 10.1039/c9ra07717k -
N h confiance 1,0
“NH.65,66 cm-1 cm-1 group specified the bending band of They have assigned 1442 and 1572 cm-1 peaks CO, CN and COOH respectively and 2928 band was attributed to CH of CH 2”
Yadav 等 - 2021 - Evaluation of tire derived rubber (TDR) fixed biof DOI: 10.1080/09593330.2020.1737736 -
Carboxyl (COOH) confiance 1,0
“Characteristic peaks (at 1572 and 1377 could be attributed to asymmetric and symmetric stretching vibrations of the COO-group, respectively.”
Enhancing the Thermal Stability of Ionogels: Synthesis and Properties of Triple Ionic Liquid/Halloysite/MCC Ionogels DOI: 10.3390/molecules26206198 -
Amide confiance 1,0
“On the other hand, the intense band appearingat 1572 correcm-1 δ(C-N-H) sponds to the asymmetric bending.”
Synthesis of New Homopiperazine-1.4-Diium Tetrachloridromercurate (II) Monohydrate (C5H14N2)[HgCl4]H2O, Crystal Structure, Hirshfeld Surface, Spectroscopy, Thermal Analysis, Antioxidant Activity, Electric and Dielectric Behavior DOI: 10.3390/cryst12040486 -
N h confiance 1,0
“The most striking difference between CG and its amine derivatives was the new The most striking difference between CG and its amine derivatives was the new cm-1 cm-1.It absorption bands at 1250-1300 and 700-800 is possible to observe a weak”
Influence of Reduction with NaBH4 and HCl in Obtaining Amino Derivatives of Cashew Gum and Cytotoxic Profile DOI: 10.3390/polym15132856 -
Carbonate confiance 1,0
“tional bands at 1626, 1429 and 1221 were attributed Additionally, one has to take into account that there is to surface bicarbonate species, while bands at 1572 or 1540 cm1 a possible impact on dispersion measurements via quanand 1331 can b”
Adsorption and Reaction of CO on (Pd–)Al2O3 and (Pd–)ZrO2: Vibrational Spectroscopy of Carbonate Formation DOI: 10.1007/s11244-017-0852-7
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