What absorbs at 1483 cm⁻¹ in an FTIR spectrum?
A band near 1483 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 4 cited sources
Brzi odgovor
A band near 1483 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 |
|---|---|---|---|
| Ring structure | 2 | 2 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| C n single bond | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
| C=n | 1 | 1 | 1,0 |
| Aromatic ring | 1 | 1 | 1,0 |
| Alkene (C=C) | 1 | 1 | 1,0 |
| Alkyl C-H | 1 | 1 | 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 1483 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
-
Alkyl C-H pouzdanost 1,0
“The stretching and bending vibrations of six-membered rings cm-1, occurred at 1578-1579, 1483, and 1456 whereas bands attributed to vibrations of C-H cm-1 arose at 1483, 1456, 1247, and 1170 (rocking) [34];”
Benjamin Ortega-Lazcano 等 - 2021 - Study of Pigments from the Colonial Convent of Act DOI: 10.3390/min11080852 -
Alkene (C=C) pouzdanost 1,0
“stretching 1483cm-1, 1210cm-1 spectrum of PANI has shown C=C stretching in the quinonoid ring at 1548 cm-1, C=N stretching vibration at C-N stretching vibrations of diverse benzenoid at and C-H bending”
Kukulski 等 - 2020 - A Polymeric Composite Material (rGOPANI) for Acid DOI: 10.3390/polym12051051 -
Ring structure pouzdanost 1,0
“The two bands at 1333cm-1 first were both assigned to the ring stretch, the one coupled with OH and the 1483 and 1373cm-1 other one with in-plane bending mode (Edwards et al., 2003).”
Lorenz 等 - 2022 - Survival of Xanthoria parietina in simulated space DOI: 10.1017/S1473550422000076 -
Ring structure pouzdanost 1,0
“1523 109 1559 1517 92 1525.0 vs Ring stretch δ 1483 1450 14 1499 1459 12 1448.0 w asCH 3”
Structure, Spectra and Photochemistry of 2-Amino-4-Methylthiazole: FTIR Matrix Isolation and Theoretical Studies DOI: 10.3390/molecules27123897
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