What absorbs at 2358 cm⁻¹ in an FTIR spectrum?
A band near 2358 cm⁻¹ can point to several functional groups. Below are the most likely assignments, ranked by how much published evidence supports each — every one traceable to literature (DOI) and cross-validated against our 130,000+ reference spectra and knowledge graph.
Backed by 8 cited sources
Quick answer
A band near 2358 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.
Möjliga identifieringar av funktionella grupper
| Funktionell grupp | Stödjande fakta | Citerade källor | Högsta förtroende |
|---|---|---|---|
| Carbon dioxide | 6 | 6 | 1,0 |
| Methacrylate | 4 | 4 | 1,0 |
| Acetate | 4 | 4 | 1,0 |
| C-O single bond | 3 | 3 | 1,0 |
| Alkyl C-H | 3 | 1 | 1,0 |
| Methoxy (OCH3) | 2 | 2 | 1,0 |
| Hydroxyl (O-H) | 2 | 2 | 1,0 |
| Alkene (C=C) | 2 | 2 | 1,0 |
| Ketone | 2 | 2 | 1,0 |
| Ester | 2 | 2 | 1,0 |
| Carboxyl (COOH) | 2 | 2 | 1,0 |
| Carbonyl (C=O) | 2 | 2 | 1,0 |
| Amide | 2 | 2 | 1,0 |
| Oxygen heterocycle | 1 | 1 | 1,0 |
| Hydrogen bond | 1 | 1 | 1,0 |
| Metal oxygen | 1 | 1 | 1,0 |
| Adsorbed carbon monoxide | 1 | 1 | 0,9 |
Rankingen speglar ackumulerade litteraturbevis, inte en enda auktoritativ regel. Bekräfta alltid mot din provkontext.
Possible materials
| Material | Stödjande toppar | Overlapping groups | Citerade källor |
|---|---|---|---|
| PMMA | 2358, 1722, 1383 | Methacrylate, Acetate, C-O single bond | 1 |
| CdS | 2358, 1375, 1092 | Methacrylate, C-O single bond, Acetate | 1 |
| lignin | 2358, 1035, 1510 | Methacrylate, Acetate, C-O single bond | 1 |
| rGO | 2358, 2930, 1645 | Methacrylate, Acetate, C-O single bond | 1 |
| Fe3O4 | 2358, 1673, 2923 | Methacrylate, Acetate | 1 |
| saliva | 2358, 1648, 1664 | Methacrylate, Acetate, C-O single bond | 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 2358 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.
Litteratur bakom dessa identifieringar
-
Carbon dioxide förtroende 1,0
“Broad [20, 35] vibration 2358 vibrational CO Carbon dioxide Sharp”
Aziz 等 - 2023 - Water remediation capability of cubic-phase CdS na DOI: 10.15251/DJNB.2023.181.203 -
förtroende 1,0
“FTIR results shows the chemical bonding at around 580.96 1191.61 Journal 1, cm-1, 2358.27cm-1, cm-1 cm-1attributes 1559.36 2987.45 and 3360 for the Fe-O, CO, C=C,C=O, C-H 2and O-H bonds respectively whereas Raman shift for Fe 3O was 4 cm-1.”
Devi 等 - 2020 - Investigation of chemical bonding and supercapacit DOI: 10.1016/j.diamond.2020.107756 -
Carbon dioxide förtroende 1,0
“2659 Unassigned band O�C�O 2358 stretching Carbon dioxide 2322 Unassigned band”
Ferreira 等 - 2020 - Attenuated Total Reflection-Fourier Transform Infr DOI: 10.1155/2020/4343590 -
Acetate förtroende 1,0
“The peak at 2358 is assigned to the cm-1 C=O”
Liang 等 - 2020 - Thermal Kinetics of a Lignin-Based Flame Retardant DOI: 10.3390/polym12092123 -
Carbon dioxide förtroende 1,0
“Negligible change in the intensity of the peak at ~2358 cm-1 (attributed to free CO 2) indicates the insignificant amount of CO gas evolved in the 2”
Prasad 和 Lal - 2023 - Spectroscopic Investigations of Optical Bandgap an DOI: 10.33263/BRIAC132.187 -
Acetate förtroende 1,0
“The peak situated cm-1 at 2358 is due to the C-O stretching mode resulting from the adsorption of CO on the surface of the nano2 particles [61].”
Punia 等 - 2021 - Microstructural, Optical and Magnetic Study of Ni- DOI: 10.1007/s10948-021-05967-y -
Alkene (C=C) förtroende 1,0
“The peak at 2923 represents C-H group with stretched vibration S cm-1 of strong intensity and the peak at 2358 shows C=C with stretched vibration.”
Yazhiniprabha 和 Vaseeharan - 2019 - In vitro and in vivo toxicity assessment of seleni DOI: 10.1016/j.msec.2019.109763 -
Carbon dioxide förtroende 1,0
“The evolved carbon dioxide molecules give rise to the characteristic bands at 2358, evolved carbon dioxide molecules give rise to the characteristic bands at 2358, 2322 and [24].”
TG-DSC and TG-FTIR Studies of Annelated Triazinylacetic Acid Ethyl Esters—Potential Anticancer Agents DOI: 10.3390/molecules28041735
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