What absorbs at 539 cm⁻¹ in an FTIR spectrum?
A band near 539 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 6 cited sources
Brzi odgovor
A band near 539 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 |
|---|---|---|---|
| Metal oxygen | 4 | 4 | 1,0 |
| Silicon (Si) | 2 | 2 | 1,0 |
| Silicon-oxygen (Si-O) | 2 | 2 | 1,0 |
| Carboxyl (COOH) | 2 | 2 | 1,0 |
Rangiranje odražava akumulirane literaturne dokaze, a ne jedno autoritativno pravilo. Uvijek provjerite u kontekstu vašeg uzorka.
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 539 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
“Cresol fast violet is cm-1 bands at 539 and 473 are related to Fe-O stretching widely used in different industry and hazardous to aquatic and bending vibration mode of α-Fe 2O respectively.”
Photo-catalytic activity of highly efficient binary Mn–Fe nano composite oxides for degradation of cresol fast violet: phase formation and band gap study DOI: 10.1007/s10854-017-7206-x -
Carboxyl (COOH) pouzdanost 1,0
“The characteristic tannin absorption for zinc carboxylates, given by the asymmetric 1710cm-1 C(cid:2)O is masked by the carboxylic stretching around stretch vibration band of the carboxylate group, is 1,539cm-1.”
Cortea 等 - 2020 - Application of Spectroscopic and Hyperspectral Ima DOI: 10.3389/fmats.2020.601339 -
Metal oxygen pouzdanost 1,0
“The FTIR cm-1 cm-1 spectra of HNTs showed the characteristic bands at 1649 (Si-O stretching, 539 (Al-O-Si vibration), cm-1”
Investigation of halloysite nanotubes and Schiff base combination with deposited copper iodide nanoparticles as a novel heterogeneous catalytic system DOI: 10.1038/s41598-021-02991-9 -
pouzdanost 1,0
“The band cm-1 cm-1 at 912 represents Al-Al-OH bonds [2], and the band at 539 represents the Al-O-Si bending”
Characterization and Hemostatic Potential of Two Kaolins from Southern China DOI: 10.3390/molecules24173160 -
pouzdanost 1,0
“2c and obtained peaks are at 539, 1402, 3370 and 3622 3 cm-1 The main characteristic absorption peak is at 539 which is corresponding to Mn-O or Cu-O stretching modes38 cm-1 stretching39.”
Fabrication of selective and sensitive chemical sensor probe based on ternary nano-formulated CuO/MnO2/Gd2O3 spikes by hydrothermal approach DOI: 10.1038/s41598-020-76662-6 -
Carboxyl (COOH) pouzdanost 0,9
“Same sentence as above”
Marudhu 等 - 2022 - Influence of L-alanine doping on zinc (IRIS) thiou DOI: 10.21203/rs.3.rs-1480676/v1
Imate li spektar s ovom vrpcom?
Prenesite svoj FTIR spektar i dobijte potpuno izvješće o interpretaciji — dodjele vrhova s literaturnim citatima, podudaranja knjižnice i lanac dokaza s ocjenom pouzdanosti — u sekundama.