What absorbs at 1503 cm⁻¹ in an FTIR spectrum?
Una banda cerca de 1503 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
Respuesta rápida
A band near 1503 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 | 5 | 4 | 1,0 |
| Aromatic ring | 2 | 2 | 1,0 |
| Carbonyl (C=O) | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| Lignin | 1 | 1 | 1,0 |
| Ring structure | 1 | 1 | 1,0 |
| Chitosan | 1 | 1 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Phosphorus | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
| C=n | 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.
Lógica de espectro
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 1503 cm⁻¹ is usually not enough for material identification by itself.
Uso en el mundo real
Este tipo de consulta es común en la identificación de polímeros, cribado de plásticos desconocidos, resolución de problemas de control de calidad, verificación de materiales reciclados y revisión de asignación de picos respaldada por la literatura.
Errores comunes
- Tratar una banda aislada como prueba de un material sin verificar al menos uno o dos picos de apoyo.
- Ignorando superposición: múltiples grupos funcionales pueden contribuir cerca del mismo número de onda.
- Omitir la validación cuando los aditivos, las mezclas, la oxidación o la contaminación puedan distorsionar el espectro.
Consejo de verificación
Cuando persista la ambigüedad, valide la hipótesis con DSC, GC-MS o TGA, especialmente para mezclas, muestras degradadas y polímeros rellenos.
Literatura detrás de estas asignaciones
-
confianza 1,0
“However, when the film was stored in a desiccator, the peak around 1503 is mainly caused by the bending mode the color changed very slowly, further confirming that the humidity of the N-H bond and the stretching mode of O-H and C-H bonds, c”
Hydration of mixed halide perovskites investigated by Fourier transform infrared spectroscopy DOI: 10.1063/1.5087914 -
Carboxyl (COOH) confianza 1,0
“cm-1, (representing the OH of alcohol), 1195 (for the amine functional group), 1503 cm-1 cm-1 cm-1 2574 (peaks corresponding to COOH), 2945 (C-H stretching), 3386 (the cm-1 N-H-, C-H-, and O-H-bond stretching of amines and amides), and 3696”
Antibacterial and Antibiofilm Activity of Ficus carica-Mediated Calcium Oxide (CaONPs) Phyto-Nanoparticles DOI: 10.3390/molecules28145553 -
Phosphorus confianza 1,0
“represents 4.8 wt %, the magnesium content reprecm(cid:1)1 peak at 1503 attributed to NOH stretching sents 1.7 wt %, the phosphorus content represents 1.2 cm(cid:1)1 appears at 328°C, the 1085 peak attributed to”
Zhang 等 - 2002 - Thermal properties of Bombyx mori silk fibers DOI: 10.1002/app.11089 -
confianza 1,0
“(cm-1): FTIR (ATR) ν 33693292 (NH 2), 3090 (aromatic C-H stretch), 2950 and 2870 (aliphatic C-H stretch), 1503 (N-H out of plane deformation), 1300 (N-ring stretch), 1280 (CN stretch) and 750 (C-H out of plane).”
Elaboration of new modified electrodes (MEs) by electropolymerization of Cu(II)-Schiff base complexes bearing pyrrole moieties: Application in electroreduction of acetophenone and carbon dioxide DOI: 10.1016/j.eurpolymj.2018.10.016 -
Alkyl C-H confianza 1,0
“C-H stretching, methyl of TMC (1503 C-H bending, CH 3CO (1390 and C-O-C stretching (1158, cm-1).”
Dual-responsive (pH/temperature) Pluronic F-127 hydrogel drug delivery system for textile-based transdermal therapy DOI: 10.1038/s41598-019-48254-6 -
Aromatic ring confianza 1,0
“Characteristic bands of furosemide (spectrum g) g) occur at 1593.5 cm-1 (NH2 scissoring vibration), 1503.1 cm-1 (aromatic ring stretching), 1334.2 cm-1 cm-1 cm-1”
Garbacz 和 Wesolowski - 2018 - DSC, FTIR and Raman Spectroscopy Coupled with Mult DOI: 10.3390/molecules23092136 -
Aromatic ring confianza 1,0
“com PEER-REVIEWED ARTICLE cm-1 The peak at 1503 was indicative of the deformation vibration within the benzene rings in carvacrol (Lin-Vien et al.”
Lipeh 等 - 2019 - Determination of Carvacrol Content in Alaska Yello DOI: 10.1007/s001070050285 -
Lignin confianza 1,0
“LLM confirmed rule peak-group candidate”
Oak wood degradation processes induced by the burial environment in the archaeological site of Biskupin (Poland) DOI: 10.1186/s40494-020-00390-3
¿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.