What absorbs at 423 cm⁻¹ in an FTIR spectrum?
A band near 423 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 423 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 |
|---|---|---|---|
| Metal oxygen | 5 | 5 | 1,0 |
| Silicon-oxygen (Si-O) | 3 | 3 | 1,0 |
| Hydroxyl (O-H) | 3 | 3 | 1,0 |
| Silicon (Si) | 2 | 2 | 1,0 |
| Methoxy (OCH3) | 1 | 1 | 1,0 |
| Methacrylate | 1 | 1 | 1,0 |
| C-O single bond | 1 | 1 | 1,0 |
| Acetate | 1 | 1 | 1,0 |
| Metalloid oxygen | 1 | 1 | 1,0 |
| Carbonate | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| Thiol | 1 | 1 | 1,0 |
| C-S single bond | 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 |
|---|---|---|---|
| soil | 423, 575, 1240 | Hydroxyl (O-H), Silicon-oxygen (Si-O) | 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 423 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
-
încredere 1,0
“the temperature till 873 K, one can conclude that the peak at 423K It is interesting to observe that the rate of reduction was inirepresents the metallic state of Au species.”
Fabrication and characterization of bimetallic Pt⠍Au nanowires supported on FSM-16 and their catalytic activities toward water⠍gas shift reaction DOI: 10.1016/j.jcis.2010.10.008 -
Silicon (Si) încredere 1,0
“FTIR Analysis cm-1 plane bending vibration and (779,972) correspond to the tensile vibration of the Figure 5 shows that the absorption bands at (423,536) cm-1 correspond to the in-plane Si-O bond, indicating the existence of C-S-H gel [26-2”
Preparation and Characterization of Low-Carbon Cementitious Materials Based on Soda-Residue-Activated Ground Granulated Blast-Furnace Slag: A Case Study on Cemented Paste Backfills DOI: 10.3390/met -
încredere 1,0
“The FTIR spectral peak cm-1 observed at 423 corresponds to the stretching frequency of Ni-O nanoparticles [19].”
Synthesis and Crystal Structure of [Ni(Amgu)2]X2 – Novel Solid-State Precursors for NiO Nanoparticles DOI: 10.1016/j.ica.2018.07.021 -
Silicon-oxygen (Si-O) încredere 1,0
“cm-1 Peaks at wavenumbers of 423, 463, and 520 are associated with the O-Si-O bending of Peaks at wavenumbers of 423, 463, and 520 cm-1 are associated with the O-Si-O bending of”
Varrica 等 - 2019 - ATR-FTIR Spectral Analysis and Soluble Components DOI: 10.3390/ijerph16142507 -
Metal oxygen încredere 1,0
“4 at 568 cm-1 corresponded to the υ(Fe-O) lattice stretching vibration of magnetite (Fe 3O 4) cm-1, cm-1, (υ(Fe-O)) at 568 as well as the observed band at ~423 which was the bluenanoparticles [4].”
Mesoporous Magnetic Cysteine Functionalized Chitosan Nanocomposite for Selective Uranyl Ions Sorption: Experimental, Structural Characterization, and Mechanistic Studies DOI: 10.3390/polym14132568 -
Hydroxyl (O-H) încredere 1,0
“The sharp strong peak at 423 cm-1 was a double degenerate (Au) mode of the OH stretching and translational vibrations [61].”
Thermal Degradation Characteristics of Styrene-Butadiene-Styrene Copolymer Asphalt Binder Filled with an Inorganic Flame-Retarding Agent DOI: 10.3390/polym14183761 -
Carbonate încredere 1,0
“Finally, the peak present at 423 °C with 18% weight loss is attributed to the degradation of fragments and monomer unit's conversion into carbonate.”
Flores-Hernandez 等 - 2021 - Synthesis of a Biodegradable Polymer of Poly (Sodi DOI: 10.3390/polym13040504 -
Hydroxyl (O-H) încredere 1,0
“The first component, Cp1, accounted for 48.2% of the variance and showed large positive (> 0.7) loadings for cm-1) kaolinite (3694, 3651, 3619, 1029, 1005, 911, 693, 647, 606, 585, 531, 423 cm-1) and OH (3424 and 3215 vibrations, chromatici”
Garcia-Lopez 等 - 2022 - Understanding Necrosol pedogenetical processes in DOI: 10.1038/s41598-022-14750-5
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