What absorbs at 1358 cm⁻¹ in an FTIR spectrum?
A band near 1358 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 1358 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 |
|---|---|---|---|
| Alkyl C-H | 4 | 4 | 1,0 |
| Hydroxyl (O-H) | 4 | 2 | 1,0 |
| Secondary amine | 2 | 2 | 1,0 |
| C n single bond | 2 | 2 | 1,0 |
| Amide | 2 | 2 | 1,0 |
| Methoxy (OCH3) | 2 | 2 | 1,0 |
| Methacrylate | 2 | 2 | 1,0 |
| C-O single bond | 2 | 2 | 1,0 |
| Acetate | 2 | 2 | 1,0 |
| N-O bond | 2 | 2 | 1,0 |
| Silanol (Si-OH) | 2 | 1 | 1,0 |
| Silicon (Si) | 2 | 1 | 1,0 |
| Nitro (NO2) | 2 | 1 | 0,9 |
| C c single bond | 1 | 1 | 1,0 |
| Protein random coil | 1 | 1 | 1,0 |
| Hydrogen bond | 1 | 1 | 1,0 |
| Water (H2O) | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| Carbonate | 1 | 0 | 0,7 |
Rankingen speglar ackumulerade litteraturbevis, inte en enda auktoritativ regel. Bekräfta alltid mot din provkontext.
Possible materials
| Material | Stödjande toppar | Overlapping groups | Citerade källor |
|---|---|---|---|
| MWCNT | 1358, 2876, 1430 | Alkyl C-H, Hydroxyl (O-H) | 1 |
| MWCNTs | 1358, 3396, 1735 | Alkyl C-H, 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 1358 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
-
Silicon (Si) förtroende 1,0
“The higher nanoclay from 1 to 4.0 wt% of PGN nanoclay indicating the content in the polymer liquid (4.0 wt% or more) strong interaction of nanoclays with the polymer chains.[20] cm-1 influenced the manipulation and mixing of cements The pea”
Fareed 和 Stamboulis - 2014 - Nanoclay addition to a conventional glass ionomer DOI: 10.4103/1305-7456.143619 -
N-O bond förtroende 1,0
“(cid:2) 3shifts.24 cm-1 The 3-NO band constantly appears at 1357 with in frequency For a NaNO crystal, when this reason 3 (cid:2) 3a sharp peak below 71.4% RH, which is consistent with the is responsible for the splitting of the 3-NO band,”
Lu 等 - 2008 - Molecular events in deliquescence and efflorescenc DOI: 10.1063/1.2973623(cid:5) -
N-O bond förtroende 1,0
“As photolysis, but a peak at 2136 cm-1), cm-1 peaks (1617 and 2906 a expected, gas-phase NO that is observed with the sample rod in the around 2222 2 cm-1), 3- (∼1800 and a solid NO peak (1358 BrNO peak down position, probing both the solid”
Probing Matrix Effects on the Heterogeneous Photochemistry of Neonicotinoid Pesticides, Dinotefuran and Nitenpyram DOI: 10.1021/acsearthspacechem.1c00059 -
Alkyl C-H förtroende 1,0
“PTT shows high resilience and elastic cm-1 was the trans conformation whereas the band at 1358 recovery compared to nylons and other aromatic polyesters, attributed to the gauche conformation of the methylene applications.3,4 making it very”
Vasanthan 和 Manne - 2013 - Strain-Induced Crystallization and Conformational DOI: 10.1021/ie401783y -
Acetate förtroende 1,0
“The peaks at 1580, 1358, 1159 and 1060 cm-1 can be assigned to the and C-O, N-H N-H and and O-H N-H O-H bonds;”
Abuhimd 等 - 2020 - Influence of Magnesium Aluminate Nanoparticles on DOI: 10.3390/coatings10100968 -
Protein random coil förtroende 1,0
“This indicates that molecules in cm1 Figure 3 Peak heights of (a) the crystalline band at 1358 and the RAP neither behave like random coils as that in MAP, nor cm1, cm1 (b) the crystalline band at 1711 and the amorphous band at 815 cm1”
Chen Zhen 和 Yan ShouKe - 2013 - Structural variation of melt-crystallized PTT duri DOI: 10.1007/s11434-012-5589-x -
Alkyl C-H förtroende 1,0
“cm-1 3000 The peak observed at 1358 (j in the Figure 4) is assigned to bending of cm-1 CH [29], while the peak observed at 1470 (k in the Figure 4) is assigned to bending 2 vibration of CH [29];”
Composite Polymer Electrolytes Based on (PEO)4CF3COOLi and Multi-Walled Carbon Nanotube (MWCNT) DOI: 10.3390/polym15010049 -
Acetate förtroende 1,0
“O-H bending al- - 1380 1380 1372 1372 1380 1380 1411 - - - cohol -C-Nstretching 1358, 1348 - - - - - - - 1360 - 1357 C-O stretching”
Mikolaszek 等 - 2022 - Microscopic and Spectroscopic Imaging and Thermal DOI: 10.3390/polym14142888
Har du ett spektrum med detta band?
Ladda upp ditt FTIR-spektrum och få en fullständig tolkningsrapport – toppidentifieringar med litteraturhänvisningar, biblioteksmatchningar och en förtroendebedömd beviskedja – på sekunder.