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
Snel antwoord
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.
Mogelijke functionele-groeptoewijzingen
| Functionele groep | Ondersteunende feiten | Geciteerde bronnen | Hoogste vertrouwen |
|---|---|---|---|
| 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 |
Ranglijst weerspiegelt cumulatief literatuurbewijs, niet één gezaghebbende regel. Bevestig altijd aan de hand van uw monsterecontext.
Mogelijke materialen
| Materiaal | Ondersteunende pieken | Overlappende groepen | Geciteerde bronnen |
|---|---|---|---|
| MWCNT | 1358, 2876, 1430 | Alkyl C-H, Hydroxyl (O-H) | 1 |
| MWCNTs | 1358, 3396, 1735 | Alkyl C-H, Hydroxyl (O-H) | 1 |
Materialen worden alleen getoond wanneer dezelfde literatuurpool deze band en ten minste één extra karakteristieke piek ondersteunt.
Spectrumlogica
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.
Gebruik in de praktijk
Dit type query komt vaak voor bij polymeeridentificatie, screening van onbekende kunststoffen, probleemoplossing bij QC, verificatie van gerecycled materiaal en literatuurondersteunde beoordeling van piektoewijzing.
Veelgemaakte fouten
- Het behandelen van een enkele geïsoleerde band als bewijs van een materiaal zonder ten minste een of twee ondersteunende pieken te controleren.
- Overlap negeren: meerdere functionele groepen kunnen bijdragen rond hetzelfde golfgetal.
- Validatie overslaan wanneer additieven, mengsels, oxidatie of verontreiniging het spectrum kunnen verstoren.
Advies voor verificatie
Wanneer dubbelzinnigheid blijft bestaan, valideer de hypothese met DSC, GC-MS of TGA, vooral voor mengsels, gedegradeerde monsters en gevulde polymeren.
Literatuur achter deze toewijzingen
-
Silicon (Si) vertrouwen 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 vertrouwen 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 vertrouwen 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 vertrouwen 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 vertrouwen 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 vertrouwen 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 vertrouwen 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 vertrouwen 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
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