What absorbs at 3134 cm⁻¹ in an FTIR spectrum?
A band near 3134 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 3134 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 |
|---|---|---|---|
| N h | 3 | 2 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Oxygen heterocycle | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| Aromatic ring | 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 |
|---|---|---|---|
| cellulose | 3134, 1735, 1650 | Alkyl C-H | 1 |
| hemicellulose | 3134, 1730, 897 | Alkyl C-H | 1 |
| gelatin | 3134, 1652, 3300 | Alkyl C-H, N h | 1 |
| lignin | 3134, 1035, 1510 | Alkyl C-H | 1 |
| biomass | 3134, 1082, 1282 | Alkyl C-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 3134 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
“In the case of 5-FU, the N-H stretching vibration appeared at cm-1, cm-1 3134 whereas the peaks at 3068, 2932, 2887, and 2826 are attributed to both aromatic and aliphatic C-H stretching vibrations.”
Blend Hydrogel Microspheres of Carboxymethyl Chitosan and Gelatin for the Controlled Release of 5-Fluorouracil DOI: 10.3390/pharmaceutics9020013 -
N h pouzdanost 1,0
“Similarly, POPD/PLUprotonsofPOPD(takenas1/3)andPLU(takenas1/4)wereused cm(cid:3)1 20/80 showed the NH stretching vibration peak at 3134 for calculating their molar ratios in the copolymer.”
Microwave-assisted facile synthesis of poly(luminol-co-phenylenediamine) copolymers and their potential application in biomedical imaging DOI: 10.1039/c8ra08373h -
Oxygen heterocycle pouzdanost 1,0
“3364 O-H stretching 1661 Carbonyl stretching HMF C=C 1561 stretching (furan ring) 3134”
Zhuang 等 - 2020 - Observation of Potential Contaminants in Processed DOI: 10.3390/app10124345 -
Aromatic ring pouzdanost 0,8
“Weak peaks at 2921, 2977, 3106, 3134 assignable to CH and aromatic.”
Kurtaran 等 - 2007 - Synthesis, characterization, crystal structure and DOI: 10.1080/00958970701340511
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.