What absorbs at 428 cm⁻¹ in an FTIR spectrum?
A band near 428 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 428 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 |
| Chlorine | 1 | 1 | 1,0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1,0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1,0 |
| Water (H2O) | 1 | 1 | 1,0 |
| Phosphate (PO4) | 1 | 1 | 0,7 |
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 |
|---|---|---|---|
| TiO2 | 428, 1700, 1093 | Metal oxygen | 1 |
| nanoparticles | 428, 1732, 1647 | Metal oxygen | 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 428 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 peaks located at 493, 443 and cm-1 428 is likely due to the vibration of the TiO 2, which confirms the prepared sample is TiO nanostructures.”
Synthesis and Characterization of Spindle-Like TiO2 Nanostructures and Photocatalytic Activity on Methyl Orange and Methyl Blue Dyes Under Sunlight Radiation DOI: 10.1007/s10876-017-1245-6 -
pouzdanost 1,0
“The peaks at 1124 and 428 cm-1 are the typical absorption peaks of the Zn-O bond,”
Kumar 等 - 2021 - Centella asiatica mediated facile green synthesis DOI: 10.1016/j.inoche.2021.108865 -
Water (H2O) pouzdanost 1,0
“hydroxyl group and water Silicaandsilicates;aluminumoxyhydroxide 7 1099 Si-Ostretch;OHvibration andironoxyhydroxides 4 1681 Stretching Water molecules SO428 665”
The Physico-Chemical and Mineralogical Characterization of Mg-Rich Synthetic Gypsum Produced in a Rare Earth Refining Plant DOI: 10.3390/su13094840 -
pouzdanost 1,0
“After calcinalamp (HWL 500 W 225 V E40) was purchased from the OSRAM tion, all the characteristic peaks of the ligand disappeared and Company in China and the short wavelength components of the only a peak at 428 cm-1, which is attributed t”
Bijanzad 等 - 2015 - Photocatalytic activity of mesoporous microbricks DOI: 10.1016/S1872-2067(14)60305-3 -
pouzdanost 1,0
“the sharpness of these bands fairly cm-1, cm-1 428 can be attributed to Fe-O symmetric stretching indicate lack of defects and crystal purity.”
Kiss 等 - 2015 - Elucidating Some Issues Regarding the Synthesis of DOI: 10.1063/1.4937250 -
pouzdanost 1,0
“In cm-1 450S and 650S, the twin peaks near 428 and 444 [74, cm-1 Si-O Si-O-Si 75] are from bending;”
Biochar from co-pyrolysis of urban organic wastes—investigation of carbon sink potential using ATR-FTIR and TGA DOI: 10.1007/s13399-020-01000-9 -
Chlorine pouzdanost 1,0
“423.8 16.4 the control, only a slight increase in the degradation peak temperature 428.2 and a decrease of the enthalpy due to the lower crystallinity of the CO+pH +CL 309.3;”
Yavuz 等 - 2018 - Structural coloration of chitosan coated cellulose DOI: 10.1016/j.carbpol.2018.03.084 -
Phosphate (PO4) pouzdanost 0,7
“PO ν in region 428-455”
Seredin 等 - 2020 - Development of a new approach to diagnosis of the DOI: 10.1038/s41598-020-78078-8
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