What absorbs at 534 cm⁻¹ in an FTIR spectrum?
A band near 534 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
Răspuns rapid
A band near 534 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.
Atribuiri posibile ale grupelor funcționale
| Grup funcțional | Fapte suport | Surse citate | Încredere maximă |
|---|---|---|---|
| Hydroxyl (O-H) | 6 | 5 | 1,0 |
| Methacrylate | 5 | 5 | 1,0 |
| Acetate | 5 | 5 | 1,0 |
| C-O single bond | 5 | 4 | 1,0 |
| Methoxy (OCH3) | 4 | 4 | 1,0 |
| Ketone | 2 | 2 | 1,0 |
| Ester | 2 | 2 | 1,0 |
| Carboxyl (COOH) | 2 | 2 | 1,0 |
| Carbonyl (C=O) | 2 | 2 | 1,0 |
| Amide | 2 | 2 | 1,0 |
| Metal oxygen | 2 | 2 | 1,0 |
| N-O bond | 2 | 2 | 1,0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1,0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1,0 |
| Silicon (Si) | 1 | 1 | 1,0 |
| Aromatic ring | 1 | 1 | 1,0 |
| Phosphate (PO4) | 1 | 1 | 1,0 |
| Ring structure | 1 | 1 | 1,0 |
Clasamentul reflectă dovezile acumulate din literatură, nu o singură regulă autoritară. Confirmați întotdeauna în contextul mostrei dvs.
Materiale posibile
| Material | Vârfuri suport | Grupuri suprapuse | Surse citate |
|---|---|---|---|
| ZnO | 534, 1400, 3430 | Hydroxyl (O-H), Acetate, Methacrylate | 1 |
| TiO2 | 534, 1700, 1093 | Hydroxyl (O-H), Methacrylate, Acetate | 1 |
| silver nanoparticles | 534, 1636, 1631 | Hydroxyl (O-H), Methacrylate, Acetate | 1 |
| polypropylene | 534, 1030, 1600 | Methacrylate, Acetate, Hydroxyl (O-H) | 1 |
Materialele sunt afișate numai atunci când același grup de literatură susține această bandă și cel puțin un vârf caracteristic suplimentar.
Logica spectrului
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 534 cm⁻¹ is usually not enough for material identification by itself.
Utilizare în condiții reale
Acest tip de interogare este comun în identificarea polimerilor, screeningul materialelor plastice necunoscute, depanarea QC, verificarea materialelor reciclate și revizuirea atribuirii vârfurilor bazată pe literatură.
Greșeli comune
- Tratarea unei benzi izolate ca dovadă a unui material fără a verifica cel puțin unul sau două vârfuri de susținere.
- Ignorând suprapunerea: mai multe grupuri funcționale pot contribui în apropierea aceluiași număr de undă.
- Omiterea validării atunci când aditivii, amestecurile, oxidarea sau contaminarea pot distorsiona spectrul.
Sfat de verificare
Când ambiguitatea rămâne, validați ipoteza prin DSC, GC-MS sau TGA, în special pentru amestecuri, probe degradate și polimeri umpluți.
Literatura din spatele acestor atribuiri
-
Hydroxyl (O-H) încredere 1,0
“1,629 for alkenyl stretch, 1,407 for phenol or cm-1 From the stock solution, the experimentalbioassaymedia was tertiary alcohol, OH bend, 1,032 for cyclohexane ring cm-1 C-I diluted using Milli Q water as a solvent to the desired convibrati”
Marimuthu 等 - 2013 - Eco-friendly microbial route to synthesize cobalt DOI: 10.1007/s00436-013-3601-2 -
Acetate încredere 1,0
“The peak at around 533.5eV groups.[25] to further explain the influence of FePP on high temperature can be attributed to -Oin C-O-C, C-O-P, or C-OH”
Synergistic effects of ferric pyrophosphate (FePP) in intumescent flameretardant polypropylene DOI: 10.1002/pat.1590 -
C-O single bond încredere 1,0
“As is also seen from Figure 3e,f, the intensity decrease in the peak at 533.6 eV related to C-OH means the existence of intramolecular or intermolecular dehydration reactions, which happen more”
Porous Structure of -Cyclodextrin for CO2 Capture: Structural Remodeling by Thermal Activation DOI: 10.3390/molecules27217375 -
încredere 1,0
“The relatedtotheZneObond.Thepeak at534.07eVisassociatedwith decrease in absorbance peak intensityalso indicates the stabilityof loosely bonded oxygen atoms such as the hydroxy group on the the BTA molecule after loading [33].”
Effect of the modified hybrid particle on the corrosion inhibition performance of polyolefin based coatings for carbon steel DOI: 10.1016/j.jsamd.2022.100466 -
încredere 1,0
“Two bands, at 534 (-17) and 440 s cm-1, c (-13) are assigned to ν(Fe-NO) and δ(Fe-NO) modes, respectively, even though r”
Hayashi 等 - 2009 - Accommodation of Two Diatomic Molecules in Cytochr DOI: 10.1021/bi801915r. -
N-O bond încredere 1,0
“peaks in PAO at 533.9, 401.9, and 283.7 eV were related to -CN-O.”
Huang 等 - 2021 - High Selective Isomerization of Glucose to Fructos DOI: 10.1021/acsomega.1c02577 -
Metal oxygen încredere 1,0
“M-O-M The peak at 533.70 eV corresponds to the bond, at 713.06 and 725.55 eV are called satellite peaks for Fe 2p 3/2 Fe+3”
Iqbal 等 - 2023 - Reduced Graphene Oxide-Modified Spinel Cobalt Ferr DOI: 10.1021/acsomega.2c06636 -
Acetate încredere 1,0
“Even though UV-irradiated TNW caused the most prominent chemical changes (c and d in Figure S8), we noted some similarities in the spectra of TNW samples under dark and UV light: (i) increase in the P 2p peak at 134.5 eV and O 1 s peak at 5”
Thorn-like TiO2 nanoarrays with broad spectrum antimicrobial activity through physical puncture and photocatalytic action DOI: 10.1038/s41598-019-50116-0
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