What absorbs at 3094 cm⁻¹ in an FTIR spectrum?
Una banda cerca de 3094 cm⁻¹ puede apuntar a varios grupos funcionales. A continuación se muestran las asignaciones más probables, clasificadas por cuánta evidencia publicada respalda cada una — cada una trazable a literatura (DOI) y validada de forma cruzada con nuestros más de 130,000 espectros de referencia y grafo de conocimiento.
Backed by 3 cited sources
Quick answer
A band near 3094 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.
Posibles asignaciones de grupos funcionales
| Grupo funcional | Hechos de respaldo | Fuentes citadas | Confianza máxima |
|---|---|---|---|
| N h | 2 | 2 | 1,0 |
| Carbonyl (C=O) | 1 | 1 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Alkene (C=C) | 1 | 1 | 1,0 |
| Amine primary | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
La clasificación refleja la evidencia acumulada de la literatura, no una única regla autorizada. Siempre confirme según el contexto de su muestra.
Spectrum logic
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 3094 cm⁻¹ is usually not enough for material identification by itself.
Real-world usage
This type of query is common in polymer identification, unknown plastic screening, QC troubleshooting, recycled-material verification, and literature-backed peak assignment review.
Common mistakes
- Treating one isolated band as proof of a material without checking at least one or two supporting peaks.
- Ignoring overlap: multiple functional groups can contribute near the same wavenumber.
- Skipping validation when additives, blends, oxidation, or contamination may distort the spectrum.
Verification advice
When ambiguity remains, validate the hypothesis with DSC, GC-MS, or TGA, especially for blends, degraded samples, and filled polymers.
Literatura detrás de estas asignaciones
-
Amide confianza 1,0
“Peaks at 3169, 3320, and andasymmetric-CH3 stretchesandthebroadpeaksat30943410cm-1 secondary amide N-H stretches as well as primary amine Ndue to the presence of the secondary amide/NHstretches,andthestrongpeakat1568cm-1 ischaracteristic H”
Alexander 等 - 2016 - Carboxylation and Decarboxylation of Aluminum Oxid DOI: 10.1155/2016/7950876 -
Alkene (C=C) confianza 1,0
“(cm-1) (cm-1) O-H 3229 3027 4 3294 3030 5 3272 3022 3 3170 3017 5 3111 2964 7 stretch =C-H 3094 3090 stretch -C-H 2976 2952 5 2942 2947 5 2971 2953 5 2953 5 2969 stretch 1738 1738”
Loarueng 等 - 2019 - Theoretical and experimental investigation of NMR, DOI: 10.24820/ark.5550190.p010.982 -
confianza 1,0
“SAC has characteristic peaks at 3094, 1713 cm-1 corresponding for stretch of amine and carbonyl cm-1”
Zhang 等 - 2017 - Preparation and Characterization of Carbamazepine DOI: 10.3390/pharmaceutics9040054
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