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
Përgjigje e shpejtë
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.
Caktime të mundshme të grupeve funksionale
| Grup funksional | Fakte mbështetëse | Burimet e cituara | Besueshmëri e lartë |
|---|---|---|---|
| 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 |
Renditja pasqyron provat e grumbulluara të literaturës, jo një rregull të vetëm autoritar. Gjithmonë konfirmoni në kontekstin e mostrës suaj.
Materialet e mundshme
| Material | Maja mbështetëse | Grupe të mbivendosura | Burimet e cituara |
|---|---|---|---|
| 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 |
Materialet shfaqen vetëm kur i njëjti grup literature mbështet këtë brez dhe të paktën një pik karakteristik shtesë.
Logjika e spektrit
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.
Përdorimi në botën reale
Ky lloj pyetjeje është i zakonshëm në identifikimin e polimereve, skriningun e plastikës së panjohur, zgjidhjen e problemeve të kontrollit të cilësisë, verifikimin e materialeve të ricikluara dhe rishikimin e caktimit të pikut të mbështetur nga literatura.
Gabimet e zakonshme
- Trajtimi i një brezi të izoluar si provë e një materiali pa kontrolluar të paktën një ose dy pika mbështetëse.
- Duke injoruar mbivendosjen: grupe të shumta funksionale mund të kontribuojnë afër të njëjtit numër valor.
- Kalimi i vërtetimit kur aditivët, përzierjet, oksidimi ose ndotja mund të shtrembërojnë spektrin.
Këshillë për verifikim
Kur mbetet paqartësi, verifiko hipotezën me DSC, GC-MS ose TGA, veçanërisht për përzierjet, mostrat e degraduara dhe polimerët e mbushur.
Literatura pas këtyre caktimeve
-
Metal oxygen besueshmëri 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 besueshmëri 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) besueshmëri 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) besueshmëri 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 besueshmëri 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 besueshmëri 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 -
besueshmëri 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
Keni një spektër me këtë brez?
Ngarkoni spektrin tuaj FTIR dhe merrni një raport të plotë interpretimi — caktim i pikut me citime literaturë, përputhje biblioteke dhe një zinxhir provash të vlerësuar me besueshmëri — në sekonda.