What absorbs at 484 cm⁻¹ in an FTIR spectrum?
A band near 484 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 7 cited sources
Brzi odgovor
A band near 484 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.
Moguće dodjele funkcionalnih skupina
| Funkcionalna skupina | Potporni dokazi | Citirani izvori | Najveća pouzdanost |
|---|---|---|---|
| Silicon-oxygen (Si-O) | 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 |
| Aromatic ring | 1 | 1 | 1,0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1,0 |
| Silicon (Si) | 1 | 1 | 1,0 |
| Chitosan | 1 | 1 | 1,0 |
| Amine primary | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| Metal oxygen | 1 | 1 | 1,0 |
Rangiranje odražava akumulirane literaturne dokaze, a ne jedno autoritativno pravilo. Uvijek provjerite u kontekstu vašeg uzorka.
Mogući materijali
| Materijal | Potporni vrhovi | Preklapajuće skupine | Citirani izvori |
|---|---|---|---|
| Fe3O4 | 484, 2358, 1673 | Methacrylate, Silicon-oxygen (Si-O) | 1 |
| calcite | 484, 2850, 2864 | Methacrylate, Methoxy (OCH3), C-O single bond | 1 |
| quartz | 484, 800, 3053 | Silicon-oxygen (Si-O) | 1 |
Materijali su prikazani samo kada ista literatura podržava ovu traku i barem jedan dodatni karakteristični vrh.
Logika spektra
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 484 cm⁻¹ is usually not enough for material identification by itself.
Upotreba u stvarnom svijetu
Ova vrsta upita uobičajena je u identifikaciji polimera, probiru nepoznate plastike, rješavanju problema u kontroli kvalitete, provjeri recikliranog materijala i pregledu dodjele vrhova potkrijepljenom literaturom.
Uobičajene pogreške
- Tretiranje jedne izolirane vrpce kao dokaza materijala bez provjere barem jednog ili dva podržavajuća pika.
- Zanemarivanje preklapanja: više funkcionalnih skupina može doprinositi u blizini istog valnog broja.
- Preskakanje validacije kada aditivi, mješavine, oksidacija ili kontaminacija mogu izobličiti spektar.
Savjet za provjeru
Kada nejasnoća ostane, validirajte hipotezu pomoću DSC, GC-MS ili TGA, posebno za mješavine, degradirane uzorke i punjene polimere.
Literatura iza ovih dodjela
-
Metal oxygen pouzdanost 1,0
“The peak at 621 ascribed to Zr-O vibrations in the nano-tetragonal ZrO [44] 2 cm-1 and the sharp peak observed at 484 is attributed to the”
Influence of pH on the structural, spectral, optical, morphological and photocatalytic properties of ZrO2 nanoparticles synthesized by sol–gel technique DOI: 10.1007/s10854-020-04134-8 -
N h pouzdanost 1,0
“bendingCH 1095-4095 2OH.20 The OH stretching frequency emerged The extracted was observed in the range of cm-1 cm-1(14,264 and also the CO (amide) and NH primary amine counts/ at 3452 chitosan showed maximum peaks at 484 cm-1”
Varma 和 Vasudevan - 2020 - Extraction, Characterization, and Antimicrobial Ac DOI: 10.1021/acsomega.0c01903 -
Silicon (Si) pouzdanost 1,0
“cm-1 bending and OH stretching, Moreover, the band at 484 is ascribed to Si-O-Si bond binding”
Fabrication of attapulgite/magnetic aminated chitosan composite as efficient and reusable adsorbent for Cr (VI) ions DOI: 10.1038/s41598-021-96145-6 -
Silicon-oxygen (Si-O) pouzdanost 1,0
“LLM confirmed rule peak-group candidate”
A Novel Open-System Method for Synthesizing Muscovite from a Biotite-Rich Coal Tailing DOI: 10.3390/min11030269 -
Aromatic ring pouzdanost 1,0
“In cm-1 requiredtoconvertthebiomasstosugars(Mankaretal.,2021).Both addition, the band at 1,517 is attributed to the C=C commercial enzymes and microorganisms known to produce stretching of the aromatic ring of lignin (Prajapati and Kango, 1”
Ningthoujam 等 - 2023 - Bioethanol production from alkali-pretreated rice DOI: 10.3389/fbioe.2023.1243856 -
Acetate pouzdanost 1,0
“1160 Ethereal C-O-C Stretching vibration of Raman shifts (cm-1) Functional groups/vibration group C-O-C group 484.22 Strong δ(CC) aliphatic chain 850-800 Aromatics and = C-H out of plane 771.47”
Sahoo 等 - 2011 - Qualitative analysis of controlled release ciprofl DOI: 10.4103/2231-4040.85541 -
pouzdanost 0,9
“Text identifies band at 482 (close to 484) as Eg mode of Co3O4.”
Cobalt Oxide Catalysts in the Form of Thin Films Prepared by Magnetron Sputtering on Stainless-Steel Meshes: Performance in Ethanol Oxidation DOI: 10.3390/catal9100806
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