What absorbs at 1478 cm⁻¹ in an FTIR spectrum?
Una banda cerca de 1478 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 1478 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 |
|---|---|---|---|
| Alkyl C-H | 8 | 8 | 1,0 |
| Amide | 4 | 4 | 1,0 |
| Secondary amine | 3 | 3 | 1,0 |
| C n single bond | 3 | 3 | 1,0 |
| Aromatic ring | 3 | 3 | 1,0 |
| N h | 2 | 2 | 1,0 |
| C c single bond | 2 | 2 | 1,0 |
| Methacrylate | 2 | 2 | 1,0 |
| C-O single bond | 2 | 2 | 1,0 |
| Acetate | 2 | 2 | 1,0 |
| Methoxy (OCH3) | 1 | 1 | 1,0 |
| Ketone | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
| Carbonyl (C=O) | 1 | 1 | 1,0 |
| Ester | 1 | 1 | 1,0 |
| Nitrogen heterocycle | 1 | 1 | 0,9 |
| N-O bond | 1 | 0 | 1,0 |
| Nitrate | 1 | 0 | 0,7 |
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 |
|---|---|---|---|
| PANI | 1478, 2930, 1300 | Alkyl C-H, Secondary amine, Amide | 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 1478 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
-
Alkyl C-H confianza 1,0
“Vibrational bands at 2935 cm-1 cm-1 and 2880 referred to a C-H stretching, 1478 to the CH bending of an alkyl”
Can 等 - 2023 - Choline Chloride-Based Deep Eutectic Solvent-Treat DOI: 10.3390/f14030569 -
Ester confianza 1,0
“appear at 1,560-1,520 The differential signal at e 1478 cm-1 1,725/1,719 is probably attributed to the 10a-ester”
Takano 等 - 2008 - Herbicide effect on the hydrogen-bonding interacti DOI: 10.1007/s11120-008-9302-5 -
C-O single bond confianza 1,0
“The ficient and variables and cm-1 represent -OH, C-OH and peaks at 1478, 1024 and 803 the interpretation of the experimental results are explained”
Bio-sorption of a bi-solute system of copper and lead ions onto banana peels: characterization and optimization DOI: 10.1007/s40201-021-00632-x -
Alkyl C-H confianza 1,0
“peaks of the C=C skeleton and C-H stretching vibration of CH2 and CH3 induced by arocm-1 However, several distinctive peaks at 1478, 2852, and 2922 were characteristic peaks matic groups of TC [46,47].”
Hanh 等 - 2023 - Adsorption of Tetracycline by Magnetic Mesoporous DOI: 10.3390/su15064727 -
Aromatic ring confianza 1,0
“cm-1 is related to the N=Q=N stretching cated at 1560 vibration in the quinoid structure, and the peak at cm-1 1478 corresponds to the N=B=N vibration of the benzenoid structure.”
He 等 - 2020 - Flexible fabric gas sensors based on PANIWO(3)p-n DOI: 10.1007/s40843-020-1364-4 -
Aromatic ring confianza 1,0
“cm-1 Aromatic C-C stretching Vibration of benzene: 1465-1490 cm-1 The aromatic C-C vibration of benzene shows a peak at 1478.24 with a transmittance of 80.26% (Fig.14) and shows a small shift toward a higher wavenumber with an increasing mo”
Hema 等 - 2022 - Structural and vibrational study of molecular inte DOI: 10.21203/rs.3.rs-649250/v1 -
Aromatic ring confianza 1,0
“The weight loss of 12.7%, between 30 and 350 is (C]C vibrations at about 1478 aromatic stretching) and about attributed to physically adsorbed water and the alkyl thiol Access cm(cid:1)1 (C-H 875 aromatic out-of-plane), due to the presence”
Synthesis and characterization of a new reusable calix[4]arene-bonded silica gel sorbent for antidiabetic drugs DOI: 10.1039/d2ra04530c -
Alkyl C-H confianza 1,0
“This]CHregionisclearlyshowninFigure4(a).Beeswax shellac wax shows an additional well-defined narrow C=O and band (acids/ketones) with the maximum being positioned at shellac wax spectra show two close narrow maxima both of 1735cm-1 CH2 scis”
Invernizzi 等 - 2018 - Mid and Near-Infrared Reflection Spectral Database DOI: 10.1155/2018/7823248
¿Tiene un espectro con esta banda?
Cargue su espectro FTIR y obtenga un informe de interpretación completo — asignaciones de picos con citas bibliográficas, coincidencias de librerías y una cadena de evidencia con calificación de confianza — en segundos.