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
Ātra atbilde
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.
Iespējamie funkcionālo grupu piešķīrumi
| Funkcionālā grupa | Atbalstošie fakti | Citētie avoti | Augstākā pārliecība |
|---|---|---|---|
| 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 |
Rangs atspoguļo uzkrātos literatūras pierādījumus, nevis vienu autoritatīvu noteikumu. Vienmēr apstipriniet atbilstoši parauga kontekstam.
Spektra loģika
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.
Reālās pasaules izmantošana
Šāda veida vaicājums ir izplatīts polimēru identificēšanā, nezināmas plastmasas skrīningā, kvalitātes kontroles problēmu risināšanā, pārstrādāto materiālu pārbaudē un ar literatūru pamatotā pīķu piešķīruma pārskatā.
Biežākās kļūdas
- Vienas izolētas joslas uzskatīšana par materiāla pierādījumu, nepārbaudot vismaz vienu vai divus atbalsta pīķus.
- Ignorējot pārklāšanos: vairākas funkcionālās grupas var dot ieguldījumu tuvu tam pašam viļņa skaitlim.
- Izlaist validāciju, ja piedevas, maisījumi, oksidācija vai piesārņojums var izkropļot spektru.
Verifikācijas padoms
Ja joprojām pastāv neskaidrība, apstipriniet hipotēzi ar DSC, GC-MS vai TGA, īpaši maisījumiem, noārdītiem paraugiem un pildītiem polimēriem.
Literatūra aiz šiem piešķīrumiem
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pārliecība 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) pārliecība 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 pārliecība 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 -
pārliecība 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 pārliecība 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 pārliecība 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 pārliecība 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 pārliecība 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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