What absorbs at 3057 cm⁻¹ in an FTIR spectrum?
A band near 3057 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
Brzi odgovor
A band near 3057 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 | 4 | 4 | 1,0 |
| Aromatic ring | 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 |
| Hydrogen bond | 1 | 1 | 1,0 |
| Carbonyl (C=O) | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| Amide | 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 3057 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
-
Amide pouzdanost 1,0
“irradiation with Co gamma rays and the spectrum changed cm-1) cmBoth amide A (3323 and amide B band (3057 notably as a function of doses.”
Bessalah 等 - 2023 - Effect of Gamma Radiation on Novel Gelatin Extract DOI: 10.17582/journal.pjz/20220218020207 -
pouzdanost 1,0
“Characteristic bands at 3460, 3363, 3196 and 3057 cm-1 due to stretching vibrations of the amine group in the physical mixture”
Garbacz 等 - 2020 - Structural Characterization of Co-Crystals of Chlo DOI: 10.3390/pharmaceutics12070648 -
Carbonyl (C=O) pouzdanost 1,0
“The FT-IR spectrum of monomer 3c has been shown in in the multitude of weak but cumulatively important C-H cm-1 Figure 1 which showed the distinct band at 1687 … O, C-H … π and π … π stacking interactions in the crysthat can be assigned to”
Liquid phase synthesis of aromatic poly(azomethine)s, their physicochemical properties, and measurement of ex situ electrical conductivity of pelletized powdered samples DOI: 10.1080/15685551.2016.1231042 -
Alkyl C-H pouzdanost 1,0
“it suggested that in skin cm-1 3007 was due to the symmetric ch stretching and 2 cancer most of the hydrogen bonds in the c-o groups of cell cm-1 asymmetric stretching modes shifted at 3057 in the breast proteins disappeared, as well as con”
Simonova 和 Karamancheva - 2013 - APPLICATION OF FOURIER TRANSFORM INFRARED SPECTROS DOI: 10.5504/BBEQ.2013.0106 -
Alkyl C-H pouzdanost 1,0
“cm-1-N-H For unirradiated CIP, the characteristic vibrations are: 3390 stretchcm-1-stretching ing vibration (piperazinyl), 3057 C-H stretching vibration (aromatic”
Optical Characterization of Ciprofloxacin Photolytic Degradation by UV-Pulsed Laser Radiation DOI: 10.3390/molecules26082324 -
Alkyl C-H pouzdanost 0,9
“Explicit assignment: 'assigned to CH asymmetric'.”
Optical Absorption and Visible Photoluminescence from Thin Films of Silicon Phthalocyanine Derivatives DOI: 10.3390/ma7096585 -
pouzdanost 0,7
“Snippet: 'asymmetric stretching at 3057 groups, the ¼¼CH'”
Aresta 等 - 2012 - Initiated-chemical vapor deposition of organosilic DOI: 10.1116/1.4711762
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