What absorbs at 2001 cm⁻¹ in an FTIR spectrum?
A band near 2001 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 2001 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 | 3 | 3 | 1,0 |
| Methoxy (OCH3) | 3 | 3 | 1,0 |
| Methacrylate | 3 | 3 | 1,0 |
| C-O single bond | 3 | 3 | 1,0 |
| Acetate | 3 | 3 | 1,0 |
| C c single bond | 2 | 2 | 1,0 |
| Hydroxyl (O-H) | 2 | 2 | 1,0 |
| Amide | 1 | 1 | 1,0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1,0 |
| C#c | 1 | 1 | 1,0 |
| Phosphate (PO4) | 1 | 1 | 1,0 |
| Ester | 1 | 1 | 1,0 |
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 |
|---|---|---|---|
| gold nanoparticles | 2001, 1638, 3252 | Alkyl C-H, Methacrylate | 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 2001 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
-
Alkyl C-H vertrouwen 1,0
“(2011) irradiated CH usually assigned to C-O stretching in alcohols (Socrates, 2001).”
Barakoti 等 - 2021 - Formaldehyde Analysis in Non-Aqueous Methanol Solu DOI: 10.3389/fchem.2021.678112 -
Hydroxyl (O-H) vertrouwen 1,0
“Nuclear Instruments and Methods in Physics Research shows the direction of increase in absorbance of OH stretching 2001;B181:367-71.”
Determination of eugenol diffusion through LLDPE using FTIR-ATR flow cell and HPLC techniques DOI: 10.1016/j.polymer.2009.01.026 -
Acetate vertrouwen 1,0
“The peak at 1030 sponds to C O and C C stretching vibrations (Ray & Sarkar, 2001).”
Kasyapi 等 - 2013 - Bionanowhiskers from jute Preparation and charact DOI: 10.1016/j.carbpol.2012.10.021 -
Alkyl C-H vertrouwen 1,0
“CH stretching aldehyde - cm-1 2001 N=C=C carbodiamide N=C=C carbodiamide cm-1 1728 Weak CH bending aromatic compound Weak CH bending aromatic compound”
Leemarose 等 - 2021 - Sustainable Synthesis of Gold Nanoparticles and it DOI: 10.13005/ojc/370216 -
Ester vertrouwen 1,0
“ν(C=O) corresponds to the vibration of the residue E286 tochangesintheglycerolbackboneofthesurroundinglipids.The ν(C=O) undergoing a change in hydrogen bonding (Nyquist et al., light-induced change in absorption of the ester vibration 2001;”
Baserga 等 - 2022 - Membrane Protein Activity Induces Specific Molecul DOI: 10.3389/fmolb.2022.915328 -
Acetate vertrouwen 1,0
“phospholipids (PO symmetric stretch)/C-O stretch, and finally the output variables, i.e., microbial populations, were reduced 2 cm-1 cm-1) at 1,044 corresponding to lipids and polysaccharides from 900 (wavelength 1,800-900 to less than 110”
Rapid Microbial Quality Assessment of Chicken Liver Inoculated or Not With Salmonella Using FTIR Spectroscopy and Machine Learning DOI: 10.3389/fmicb.2020.623788 -
Hydroxyl (O-H) vertrouwen 1,0
“The band at 3258 is due to the stretching vibrations of the O-H groups while bands cm-1, cm-1, cm-1 at 2001 2291 and 2318 are characteristic of the C-C triple bond of alkynes.”
Fawzy - 2021 - Flotation separation of dravite from phlogopite us DOI: 10.37190/ppmp/138587 -
Alkyl C-H vertrouwen 1,0
“Journal Pre-proof could also be associated with an overtone of the CH deformation vibration (Socrates, 2001).”
Huang 等 - 2021 - Prediction of biochemical methane potential of urb DOI: 10.1016/j.scitotenv.2021.147959
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