What absorbs at 1347 cm⁻¹ in an FTIR spectrum?
Una banda cerca de 1347 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 8 cited sources
Quick answer
A band near 1347 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 |
|---|---|---|---|
| Methoxy (OCH3) | 3 | 3 | 1,0 |
| Methacrylate | 3 | 3 | 1,0 |
| C-O single bond | 3 | 3 | 1,0 |
| Acetate | 3 | 3 | 1,0 |
| N-O bond | 2 | 2 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Water (H2O) | 1 | 1 | 1,0 |
| Nitro (NO2) | 1 | 1 | 0,9 |
La clasificación refleja la evidencia acumulada de la literatura, no una única regla autorizada. Siempre confirme según el contexto de su muestra.
Possible materials
| Material | Supporting peaks | Overlapping groups | Fuentes citadas |
|---|---|---|---|
| honey | 1347, 2005, 1199 | Methacrylate, Acetate, C-O single bond | 1 |
Materials are shown only when the same literature pool supports this band and at least one additional characteristic peak.
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 1347 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
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Water (H2O) confianza 1,0
“These were also located in spectrum of ionic liquid [C8mim][NTf 2] at 1347 cm-1, and 1330 while the binding of one of the oxygen atoms of the sulfonic groups of (I) the anion with a water molecule in complex lead to a significant decrease i”
Study of Lithium-Extraction Systems Based on Benzo-15-Crown-5 Ether and Alkylimidazolium-BasedIonic Liquid DOI: 10.3390/molecules28030935 -
Acetate confianza 1,0
“Bands at (v C-O) decreased as the PEGMA ratio cm-1 1347cm-1 1452”
Hamisu 和 Celik - 2017 - Poly(AN-co-PEGMA)hBNNaClO4 composite electrolyte DOI: 10.1515/epoly-2017-0022 -
N-O bond confianza 1,0
“cm-1 two very strong peaks at 1384 and 1347 are assigned to the N-O stretching vibrations The two very strong peaks at 1384 and 1347 cm-1 are assigned to the N-O stretching vibra3-).”
Deposition of Zinc Oxide Coatings on Wood Surfaces Using the Solution Precursor Plasma Spraying Process DOI: 10.3390/coatings11020183 -
Acetate confianza 1,0
“cm-1, cm-1 cm-1 1418 coming from stretching 1055 bandwidth of about 1450 cm-1 are characteristic for bending and 1347 vibrations of both C-O in C-OH and C-C vibration of O-CH and C-C-H in the group in the carbohydrate structure also carbohy”
Kedzierska-Matysek 等 - 2018 - Application of FTIR spectroscopy for analysis of t DOI: 10.1051/bioconf/20181002008 -
N-O bond confianza 1,0
“Still, the Schiff base derivative product that was -NO stretching, 1347.01 and 1315.83 for stretching.”
Manjare 等 - 2023 - Microwave-Assisted Rapid and Green Synthesis of Sc DOI: 10.1021/acsomega.2c05187 -
Alkyl C-H confianza 1,0
“The vibration bands at 3000 and 2923 cm-1 corresponded to C-H stretching of the methyl group while the characteristics bands at 1425 and 1347 cm-1 were due to the C-H symmetric and”
Fabrication of Colored Polymeric Membrane Using Clay-Based Nano Pigments of Safranin O (SO) Dye DOI: 10.3390/membranes13070619 -
Acetate confianza 1,0
“Peak appeared at 1347 is due to the stretching vibration of the C-O group.”
Naqvi 等 - 2019 - Electrochemical Sensing of Ascorbic Acid, Hydrogen DOI: 10.1002/elan.201800768 -
Nitro (NO2) confianza 0,9
“Absorption band for NS liquid phase in absence of CO2.”
Selective hydrogenation of nitrostyrene to aminostyrene over Pt/TiO2 catalysts : Effects of pressurized carbon dioxide and catalyst preparation conditions DOI: 10.1016/j.supflu.2011.02.016
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