What absorbs at 578 cm⁻¹ in an FTIR spectrum?
A band near 578 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
Brzi odgovor
A band near 578 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 |
|---|---|---|---|
| Alkyl C-H | 2 | 2 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| Silicon (Si) | 1 | 1 | 1,0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1,0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1,0 |
| Alkene (C=C) | 1 | 1 | 1,0 |
| Metal oxygen | 1 | 1 | 0,9 |
| Carboxyl (COOH) | 1 | 1 | 0,9 |
| Phosphate (PO4) | 1 | 1 | 0,8 |
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 |
|---|---|---|---|
| SiO2 | 578, 1739, 699 | Alkyl C-H, Silicon (Si), Hydroxyl (O-H) | 1 |
| CuO | 578, 453, 1000 | Hydroxyl (O-H) | 1 |
| Fe2O3 | 578, 1130, 1631 | Hydroxyl (O-H), Alkyl C-H | 1 |
| PVC | 578, 834, 1195 | Alkyl C-H, Hydroxyl (O-H) | 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 578 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
-
pouzdanost 1,0
“The bands at 475 was ascribed to CuO cm-1 Fe3+ O2vibration, whereas that at 578 corresponding to the and bonds stretching in the FeO 4 Page 5/33 tetrahedron (Hao et al.”
Bousalah 等 - 2022 - Enhanced reactivity of the CuO-Fe2O3 intimate hete DOI: 10.21203/rs.3.rs-1276158/v1 -
Alkene (C=C) pouzdanost 1,0
“The -CH=CH2 characteristic absorption peak -CH=CH stretching vibration peak of Fe-Ois 578 The characteristic absorption 2 cm-1 at 1630 cm-1 of the synthesized monomer GMA disappeared after the preparation of the peak at 1630 of the synthesi”
Design and Preparation of Imidazole Ionic Liquid-Based Magnetic Polymers and Its Adsorption on Sunset Yellow Dye DOI: 10.3390/ma15072628 -
pouzdanost 1,0
“Si or Al, symmetric stretching vibration of CO at about 2 cm-1, 873 symmetrically stretching vibration of Si-O at 698 cm-1,bendingvibrationofSi-O-Alat578cm-1 andin-plane cm-1 bending vibration of Si-O-Si and O-Si-O at 453 respectively as in”
Meng 等 - 2021 - Effects of load types and critical molar ratios on DOI: 10.1515/rams-2021-0019 -
Silicon (Si) pouzdanost 1,0
“The Si2843 777 2922 1146 2978 1032 3753 3461 578 cm-1 O-Si bending mode appears at 446 (435) [49].”
Rangelova 等 - 2011 - MethylcelluloseSiO2 hybrids sol-gel preparation DOI: 10.2478/s11532-010-0123-y -
Hydroxyl (O-H) pouzdanost 1,0
“2 cm-1 cm-1 obtained for the data acquired from DSC or FTIR 681.8 (C-Cl stretching), 577.6 (O-H bending (Table 2).”
Principal component and cluster analyses as supporting tools for co-crystals detection DOI: 10.1007/s10973-017-6436-8 -
Alkyl C-H pouzdanost 1,0
“The correlation and (c), the FITR and NMR bands were strongly correlated with intensities of aromatic carbons with other factors were much XPS band at 577.6 eV that represents the signal of reduced higher than that of aliphatic carbons, whi”
A novel method of three-dimensional hetero-spectral correlation analysis for the fingerprint identification of humic acid functional groups for hexavalent chromium retention DOI: 10.1039/c7ra12146f -
Carboxyl (COOH) pouzdanost 0,9
“Explicit assignment in text.”
Jonynaite 等 - 2010 - Spectroscopic analysis of blue cobalt smalt pigmen DOI: 10.1016/j.vibspec.2009.12.005 -
pouzdanost 0,9
“Text: 'as(CF3) ... peaks at ... 578'”
Ramesh 和 Yi - 2009 - FTIR spectra of plasticized high molecular weight DOI: 10.1007/s11581-008-0279-z
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