What absorbs at 1503 cm⁻¹ in an FTIR spectrum?
A band near 1503 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
Snabbt svar
A band near 1503 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 |
|---|---|---|---|
| N h | 5 | 4 | 1,0 |
| Aromatic ring | 2 | 2 | 1,0 |
| Carbonyl (C=O) | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| Lignin | 1 | 1 | 1,0 |
| Ring structure | 1 | 1 | 1,0 |
| Chitosan | 1 | 1 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Phosphorus | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
| C=n | 1 | 1 | 0,9 |
Rankingen speglar ackumulerade litteraturbevis, inte en enda auktoritativ regel. Bekräfta alltid mot din provkontext.
Spektrumlogik
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 1503 cm⁻¹ is usually not enough for material identification by itself.
Användning i verkligheten
Denna typ av fråga är vanlig inom polymeridentifiering, screening av okänd plast, felsökning av kvalitetskontroll, verifiering av återvunnet material och litteraturstödd toppidentifieringsgranskning.
Vanliga misstag
- Behandla ett isolerat band som bevis på ett material utan att kontrollera minst en eller två stödjande toppar.
- Ignorerar överlapp: flera funktionella grupper kan bidra nära samma vågtal.
- Hoppa över validering när tillsatser, blandningar, oxidation eller föroreningar kan förvränga spektrat.
Verifieringsråd
När oklarhet kvarstår, validera hypotesen med DSC, GC-MS eller TGA, särskilt för blandningar, nedbrutna prover och fyllda polymerer.
Litteratur bakom dessa identifieringar
-
förtroende 1,0
“However, when the film was stored in a desiccator, the peak around 1503 is mainly caused by the bending mode the color changed very slowly, further confirming that the humidity of the N-H bond and the stretching mode of O-H and C-H bonds, c”
Hydration of mixed halide perovskites investigated by Fourier transform infrared spectroscopy DOI: 10.1063/1.5087914 -
Carboxyl (COOH) förtroende 1,0
“cm-1, (representing the OH of alcohol), 1195 (for the amine functional group), 1503 cm-1 cm-1 cm-1 2574 (peaks corresponding to COOH), 2945 (C-H stretching), 3386 (the cm-1 N-H-, C-H-, and O-H-bond stretching of amines and amides), and 3696”
Antibacterial and Antibiofilm Activity of Ficus carica-Mediated Calcium Oxide (CaONPs) Phyto-Nanoparticles DOI: 10.3390/molecules28145553 -
Phosphorus förtroende 1,0
“represents 4.8 wt %, the magnesium content reprecm(cid:1)1 peak at 1503 attributed to NOH stretching sents 1.7 wt %, the phosphorus content represents 1.2 cm(cid:1)1 appears at 328°C, the 1085 peak attributed to”
Zhang 等 - 2002 - Thermal properties of Bombyx mori silk fibers DOI: 10.1002/app.11089 -
förtroende 1,0
“(cm-1): FTIR (ATR) ν 33693292 (NH 2), 3090 (aromatic C-H stretch), 2950 and 2870 (aliphatic C-H stretch), 1503 (N-H out of plane deformation), 1300 (N-ring stretch), 1280 (CN stretch) and 750 (C-H out of plane).”
Elaboration of new modified electrodes (MEs) by electropolymerization of Cu(II)-Schiff base complexes bearing pyrrole moieties: Application in electroreduction of acetophenone and carbon dioxide DOI: 10.1016/j.eurpolymj.2018.10.016 -
Alkyl C-H förtroende 1,0
“C-H stretching, methyl of TMC (1503 C-H bending, CH 3CO (1390 and C-O-C stretching (1158, cm-1).”
Dual-responsive (pH/temperature) Pluronic F-127 hydrogel drug delivery system for textile-based transdermal therapy DOI: 10.1038/s41598-019-48254-6 -
Aromatic ring förtroende 1,0
“Characteristic bands of furosemide (spectrum g) g) occur at 1593.5 cm-1 (NH2 scissoring vibration), 1503.1 cm-1 (aromatic ring stretching), 1334.2 cm-1 cm-1 cm-1”
Garbacz 和 Wesolowski - 2018 - DSC, FTIR and Raman Spectroscopy Coupled with Mult DOI: 10.3390/molecules23092136 -
Aromatic ring förtroende 1,0
“com PEER-REVIEWED ARTICLE cm-1 The peak at 1503 was indicative of the deformation vibration within the benzene rings in carvacrol (Lin-Vien et al.”
Lipeh 等 - 2019 - Determination of Carvacrol Content in Alaska Yello DOI: 10.1007/s001070050285 -
Lignin förtroende 1,0
“LLM confirmed rule peak-group candidate”
Oak wood degradation processes induced by the burial environment in the archaeological site of Biskupin (Poland) DOI: 10.1186/s40494-020-00390-3
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