What absorbs at 465 cm⁻¹ in an FTIR spectrum?
Una banda cerca de 465 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 465 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 |
|---|---|---|---|
| Silicon-oxygen (Si-O) | 9 | 6 | 1,0 |
| Silicon (Si) | 4 | 3 | 1,0 |
| Metal oxygen | 2 | 2 | 1,0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1,0 |
| Chlorine | 1 | 1 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Amide | 1 | 0 | 1,0 |
| Silicon silicon | 1 | 0 | 1,0 |
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 465 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
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confianza 1,0
“cm-1), Surprisingly, the signature of quartz (strong narrow Si-O bending peak at ~465 a very common mineral of a pottery body, is not easily detected by Raman scattering, although it is present as a minor phase in the XRPD (Figures 5, A1 an”
Asbestos-Based Pottery from Corsica: The First Fiber-Reinforced Ceramic Matrix Composite DOI: 10.3390/ma13163597 -
confianza 1,0
“Rodriguez-Fuentes et al., are attributed to asymmetric 1635cm-1 465cm-1 O-H 1998;”
Dikmen 等 - 2020 - Characterization of Ag-exchanged clinoptilolite tr DOI: 10.1180/clm.2020.33 -
Silicon-oxygen (Si-O) confianza 1,0
“The band at 465 belongs to cm-1 cm-1, cm-1 cm-1 bending vibration of O-Si-O.”
Elwan 等 - 2018 - DOI: 10.5028/jatm.v10.935 -
Alkyl C-H confianza 1,0
“On the other hand, the major band around 465 in be achieved: the ratio between the intensity of the major CH stretching envelope (2800all the NP spectra indicates formation of CeO 2.”
Towards the Development of Antioxidant Cerium Oxide Nanoparticles for Biomedical Applications: Controlling the Properties by Tuning Synthesis Conditions DOI: 10.3390/nano11020542 -
confianza 1,0
“Compared with Figure 3b, the new endothermic peaks at 465 and 530 °C should be related to the reaction of LiBH4 and the added Al.”
He 等 - 2019 - The Dehydrogenation Mechanism and Reversibility of DOI: 10.3390/met9050559 -
confianza 1,0
“463 and the precursors, MK and SSA, are given in In the spectra of the MK sample, cm1, cm-1 cm-1 464 the bands at 1032 424 and 534 are associated with the tetra-coordinated 465 Si or Al asymmetric stretching vibration of the Si-O-T group (T”
Istuque 等 - 2019 - Effect of sewage sludge ash on mechanical and micr DOI: 10.1016/j.conbuildmat.2019.01.093 -
confianza 1,0
“NI2 NI3 NI4 (Figure 4b) recorded on several samples from the same point also showed some differ- [8,37,38] [37,38] [32,37] [32] [36] [39] ences, but observed bands at 465, 523 and 608 cm-1 can be ascribed to presence of copper 87 88 (s) and”
An Electrochemical and Spectroscopic Study of Surfaces on Bronze Sculptures Exposed to Urban Environment DOI: 10.3390/ma14082063 -
confianza 1,0
“6 of 17 709.55 C=C bending Strong Alkene 556.909 C-Cl stretching Strong Halo compound 464.62”
Isolation and Characterization of a Novel Actinomycete Isolated from Marine Sediments and Its Antibacterial Activity against Fish Pathogens DOI: 10.3390/antibiotics11111546
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