What absorbs at 3107 cm⁻¹ in an FTIR spectrum?
A band near 3107 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 3107 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 |
|---|---|---|---|
| Alkyl C-H | 4 | 4 | 1,0 |
| Methoxy (OCH3) | 2 | 2 | 1,0 |
| Methacrylate | 2 | 2 | 1,0 |
| Acetate | 2 | 2 | 1,0 |
| Aromatic ring | 2 | 2 | 1,0 |
| C-O single bond | 1 | 1 | 1,0 |
| C c single bond | 1 | 1 | 1,0 |
| C-S single bond | 1 | 1 | 1,0 |
| Methyl | 1 | 1 | 1,0 |
| N-O bond | 1 | 1 | 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 |
|---|---|---|---|
| diamond | 3107, 1378, 1332 | Alkyl C-H, Methoxy (OCH3) | 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 3107 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-O bond confiance 1,0
“cm-1, 3085.4 For diamonds with no milky features, ~76% of them showed the peak at 3107 cm-1, while only ~8% showed a very weak peak at 3085.4 which is absent in the rest of the 23”
Gu 和 Wang - 2018 - Optical defects in milky type IaB diamonds DOI: 10.1016/j.diamond.2018.09.010 -
confiance 1,0
“4), values very rarely observed globally but Hydrogen impurities in diamond are indicated by an infrared 3107cm-1, absorption peak at characteristic for so-called Group B (high-Ca eclogitic) diamonds attributed to stretching vibrations of”
The micro-/macro-diamond relationship: A case study from the Artemisia kimberlite (Northern Slave Craton, Canada) DOI: 10.1016/j.lithos.2012.05.031 -
confiance 1,0
“cm-1 3.3 Hydrogen-related infrared absorption peak at 3107 cm-1 The hydrogen-related infrared absorption peak at 3107 has been assigned to the structure of three nitrogen atoms and a hydrogen atom surrounding a vacancy (VN 3H) [24].”
Lai 等 - 2020 - Spectroscopic features of natural and HPHT-treated DOI: 10.1016/j.diamond.2019.107642 -
Alkyl C-H confiance 1,0
“2808-2806 C-H in CH3 stretching 3107 3109-3123 C-H aromatic stretching The main changes observed in Figure 4, as a consequence of the reaction of AZA with”
Photodegradation of Azathioprine in the Presence of Sodium Thiosulfate DOI: 10.3390/ijms23073975 -
Alkyl C-H confiance 1,0
“The absorption peaks at gen impurity at 2850, 2920 and 3107 cm-1 sp3-CH 2are responsible for anti-symmetric vi2850 and 2920 sp3-CH 2symmetric vibrations in diamond, respectively brations and Fig.7.ThetypicalFTIRrecordedforthesynthesizeddiam”
Yan 等 - 2016 - The effect of phosphorus and nitrogen co-doped on DOI: 10.1016/j.ijrmhm.2015.08.009 -
C-S single bond confiance 1,0
“υ(HC=N) γ(HC=N) υ(C=N) C-S-C C-O υH2O cm-1 The two bands at 3107, 3103, 3085, and 3100 and at 2979, 2984, 2974, and Compounds υ(Ln-S) υ(Ln-N) Imine Imine Thiazole Thiazole Furane Lattice cm-1 2986 are due to the asymmetric and symmetric str”
Synthesis, Characterization and Biological Activities of New Schiff Base Compound and Its Lanthanide Complexes DOI: 10.3390/ph15040454 -
Alkyl C-H confiance 1,0
“and measuring in one place necessarily includes other cm-1 The peak at 3107 related to C-H vibrations is detected in most of the samples studied.”
Mashkovtsev 等 - 2021 - Specific spectroscopic features of yellow cuboid d DOI: 10.3190/jgeosci.323 -
Alkyl C-H confiance 1,0
“The height (or area) of the band at 3107 cm-1, 58 considered as the major absorption band and related to a C-H bond in the N 3VH defect 59 [23,24], is used to estimate if a diamond is "H rich" [25].”
Combination of ERDA, FTIR spectroscopy and NanoSIMS for the characterization of hydrogen incorporation in natural diamonds DOI: 10.1016/j.diamond.2023.110007
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