What absorbs at 1443 cm⁻¹ in an FTIR spectrum?
Una banda cerca de 1443 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 1443 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 | 5 | 5 | 1,0 |
| Methoxy (OCH3) | 4 | 4 | 1,0 |
| Methacrylate | 4 | 4 | 1,0 |
| Acetate | 4 | 4 | 1,0 |
| C-O single bond | 3 | 3 | 1,0 |
| Hydroxyl (O-H) | 3 | 3 | 1,0 |
| Aromatic ring | 3 | 3 | 1,0 |
| Alkene (C=C) | 3 | 3 | 1,0 |
| Silicon (Si) | 2 | 2 | 1,0 |
| C c single bond | 2 | 2 | 1,0 |
| Ring structure | 2 | 1 | 1,0 |
| Nitrogen heterocycle | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| C n single bond | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
| Methyl | 1 | 1 | 1,0 |
| Silicon carbon | 1 | 1 | 1,0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1,0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1,0 |
| Hydrogen bond | 1 | 1 | 1,0 |
| C#c | 1 | 1 | 1,0 |
| Carbonate | 1 | 1 | 1,0 |
| Lewis acid site | 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.
Possible materials
| Material | Supporting peaks | Overlapping groups | Fuentes citadas |
|---|---|---|---|
| PVA | 1443, 1660, 2930 | Alkyl C-H, Acetate, Methacrylate | 1 |
| biochar | 1443, 1640, 1115 | Alkyl C-H, Methacrylate, Acetate | 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 1443 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
-
Carbonate confianza 1,0
“Besides already exchanged with the nitrate ions that initially cm-1 that, a peak of 1443 refers to the carbonate stretching occupied the interlayer host.”
Bohari 等 - 2022 - Synthesis and Characterization of 2,4-Dichlorophen DOI: 10.22146/ijc.73546 -
C#c confianza 1,0
“LLM confirmed rule peak-group candidate”
Characterization of short-length multi-walled carbon nanotubes and cytotoxicity on MDA-MB-231 and HUVEC cell lines DOI: 10.1007/s42823-019-00081-5 -
Hydroxyl (O-H) confianza 1,0
“The characteristic bands in cm-1 cm-1 the spectrum at 3213.31 (-OH stretching) and 1443.35 (-CH 2stretching) were observed cm-1 with higher intensity.”
Sprayed in-situ synthesis of Polyvinyl alcohol/Chitosan loaded Silver nanocomposite hydrogel for improved antibacterial effects DOI: 10.1016/j.ijbiomac.2019.09.186 -
Hydroxyl (O-H) confianza 1,0
“Fig6 shows a brand value of nearly 1052 cm-1 indicates stretching vibration of the C-O group and 1443.2 indicates the presence O-H group.”
Manimegalai 等 - 2022 - Experimental investigation on ferrofluid propertie DOI: 10.15251/DJNB.2022.172.661 -
Alkyl C-H confianza 1,0
“The aliphatic deformation/bending peak characterized cm-1 at 1443 showed absorption similar to that of the aromatic C=C band.”
Mathews 和 Singh - 2016 - Characterization of solid bitumen from Panandhro l DOI: 10.18520/cs/v111/i11/1842-1846 -
Alkyl C-H confianza 1,0
“-CH2groups were confirmed theO-Hstretchingfrequencyofsilanolgroupsbondedtothe peaks and methylene bridges bythestrongabsorptionsat662and630cm-1 and1443cm-1 inorganicstructure,andtheintensebandrelatedtotheSi-O- ,”
Alahmadi 等 - 2013 - Preparation of Organic-Inorganic Hybrid Materials DOI: 10.1155/2013/634863 -
Alkyl C-H confianza 1,0
“The bands between 1443 and 1382 Characterization of carboxylated PETco textiles cm-1 correspond to = C-H bonds in the aromatic ring of the cm-1 linker.”
Alejandro Torres-Cortes 等 - 2022 - Ex situ synthesis of MOF@PETcotton textile fibers DOI: 10.1007/s10965-022-03216-x -
Alkyl C-H confianza 1,0
“Minor band at 1443 Three various biochars were produced through oxygencm-1 from CH scissoring [44].”
Simultaneous immobilization of heavy metals in soil environment by pulp and paper derived nanoporous biochars DOI: 10.1007/s40201-018-0294-6
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