What absorbs at 3614 cm⁻¹ in an FTIR spectrum?
Una banda cerca de 3614 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 5 cited sources
Quick answer
A band near 3614 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 |
|---|---|---|---|
| Hydroxyl (O-H) | 4 | 4 | 1,0 |
| Metal hydroxyl | 2 | 1 | 1,0 |
| Hydrogen bond | 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.
Possible materials
| Material | Supporting peaks | Overlapping groups | Fuentes citadas |
|---|---|---|---|
| LDPE | 3614, 1720, 1737 | Hydroxyl (O-H) | 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 3614 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
-
Hydroxyl (O-H) confianza 1,0
“(2005) (3619 Based on these observations we classify the FTIR absorption H/106Si cm-1 at C = 2300 and 3614 at 50 000 and 15 000 peaks in the OH vibration region into 4 classes.”
Nishihara 等 - 2008 - Effect of chemical environment on the hydrogen-rel DOI: 10.2138/am.2008.2653 -
Hydroxyl (O-H) confianza 1,0
“These findings suggest that CPEF-6 has the ability to degrade polyethylene, and thus For the control, critical characteristic absorption bands were assigned from 3752 to can cause certain damage to the surface of LDPE, while heat-treated LD”
Gong 等 - 2023 - Biodegradation of Low Density Polyethylene by the DOI: 10.3390/jof9060605 -
Hydroxyl (O-H) confianza 1,0
“For sample plates addition to the primary OH absorption bands of muscovite 3614cm-1, with large interference fringes, we attempted to reduce their (Fig.”
Kronenberg 等 - 2017 - Synchrotron FTIR imaging of OH in quartz mylonites DOI: 10.5194/se-8-1025-2017 -
Hydrogen bond confianza 1,0
“The peak at 3614 cm-1 represents the interlayer hydrogen bonding, corresponding Polymers2021,13,897 7of22 to the stretching vibration of the OH coordinated octahedral layer of Al+Mg [18].”
On the Use of OPEFB-Derived Microcrystalline Cellulose and Nano-Bentonite for Development of Thermoplastic Starch Hybrid Bio-Composites with Improved Performance DOI: 10.3390/polym13060897 -
confianza 1,0
“Na-ATP has characteristic peaks at 3614 and 3545 which are attributed to the stretching vibrations of Al-OH and Fe-OH, respectively.”
Investigation on the Potential Application of Na-Attapulgite as an Excipient in Domperidone Sustained-Release Tablets DOI: 10.3390/molecules27238266
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