What absorbs at 1355 cm⁻¹ in an FTIR spectrum?
Una banda cerca de 1355 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 1355 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 |
| Secondary amine | 3 | 3 | 1,0 |
| C n single bond | 3 | 3 | 1,0 |
| Amide | 3 | 3 | 1,0 |
| Methoxy (OCH3) | 2 | 2 | 1,0 |
| Methacrylate | 2 | 2 | 1,0 |
| Acetate | 2 | 2 | 1,0 |
| Ring structure | 1 | 1 | 1,0 |
| Nitrogen heterocycle | 1 | 1 | 1,0 |
| C c single bond | 1 | 1 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| Carbohydrate | 1 | 1 | 1,0 |
| Methyl | 1 | 1 | 1,0 |
| Nitrate | 1 | 1 | 1,0 |
| C-O single bond | 1 | 1 | 1,0 |
| S eq o | 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.
Possible materials
| Material | Supporting peaks | Overlapping groups | Fuentes citadas |
|---|---|---|---|
| lignin | 1355, 1035, 1510 | Alkyl C-H | 1 |
| wood | 1355, 1740, 1730 | Alkyl C-H | 1 |
| PET | 1355, 1408, 800 | Alkyl C-H, Amide | 1 |
| chitosan | 1355, 1650, 1655 | Alkyl C-H, 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 1355 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
-
Acetate confianza 1,0
“(1355 and C-O stretching (1249 It is noted that, the intensity of C-H and C-O-H bending significantly increased from 3.8% to 20.0% as presented in Fig.”
Solid polymer electrolyte production from 2-hydroxyethyl cellulose: Effect of NH4NO3 composition on its structural properties DOI: 10.1016/j.carbpol.2017.02.033 -
Nitrate confianza 1,0
“Furthermore, the sharp band at 1355 cm(cid:2)1 to the stretching vibrations of the Schiff base groups comindicates the presence of the other nitrate group”
Przybylski 等 - 2008 - ESI MS, spectroscopic and semiempirical characteri DOI: 10.1016/j.molstruc.2007.07.039 -
Alkyl C-H confianza 1,0
“On the other hand, the peak at 1355 was the combination peak of symmetry NO 2, C = O stretching, CH deformation and C-N stretching vibration.”
Synthesis and characterizations of o-nitrochitosan based biopolymer electrolyte for electrochemical devices DOI: 10.1371/journal.pone.0212066 -
Acetate confianza 1,0
“a new band at 1355 cm-1 between the previous occurred and was assigned to wood constituents (-CH 3 fromlignin/hemicellulose/polysaccharide-OH).Theseresultsindicatepossiblechemical interactions between rubber, PET, HDPE, wood, and FA compoun”
The Influence of Fly Ash on the Mechanical Properties of Water Immersed All Waste Composites DOI: 10.3390/polym14101957 -
Alkyl C-H confianza 1,0
“Furthermore, small symmetric stretching bands of formate species can be detected at 1355 cm-1, and the corresponding δ (CH) at 1375 cm-1 [88,89].”
CO2 Methanation over Nickel Catalysts: Support Effects Investigated through Specific Activity and Operando IR Spectroscopy Measurements DOI: 10.3390/catal13020448 -
Alkyl C-H confianza 1,0
“The band derived from the -C-H bond at a wavenumber of 1355 cm-1 also slightly changes.”
Preparation and Characterization of Indomethacin Supramolecular Systems with -Cyclodextrin in Order to Estimate Photostability Improvement DOI: 10.3390/molecules26247436 -
confianza 1,0
“Moreover, asymmetric S O stretching 2 cm-1, cm-1, = at 1355 and symmetric S O stretching at 1177 were observed in the FTIR spectra 2 of tosylated cellulose, which confirmed the tosylation reaction.”
A Composite Anion Conducting Membrane Based on Quaternized Cellulose and Poly(Phenylene Oxide) for Alkaline Fuel Cell Applications DOI: 10.3390/polym12112676 -
C c single bond confianza 1,0
“FTIR peaks at 1355, 1039, 1034, 1023, 1001, 999 C-C-Cinplanebend cm(cid:1)1 151 510.1825 492.8 120.4 & are indicative of this.”
Computational and spectral studies of 3,3'-(propane-1,3-diyl)bis(7,8-dimethoxy-1,3,4,5-tetrahydro-2H-benzo[d]azepin-2-one) DOI: 10.1016/j.heliyon.2019.e02420
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