What absorbs at 1348 cm⁻¹ in an FTIR spectrum?
A band near 1348 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 1348 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-O bond | 2 | 2 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| Nitro (NO2) | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| C n single bond | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
| Protein | 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.
Mogući materijali
| Materijal | Potporni vrhovi | Preklapajuće skupine | Citirani izvori |
|---|---|---|---|
| activated carbon | 1348, 1575, 1210 | Hydroxyl (O-H), Carboxyl (COOH) | 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 1348 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
“Component loadings indicate that POM has a tendency for higher absorbance than the cm-1, silt at the broad peak around 1348 that indicates aliphatics and phenolics.”
Calderon 等 - 2011 - Chemical Differences in Soil Organic Matter Fracti DOI: 10.2136/sssaj2009.0375 -
N-O bond pouzdanost 1,0
“The metastable solid phase transition from the initial solid to a metastable solid phase of NaNO (cid:3)87% (cid:3)96% deliquesced completely in the region from to RH according to the fact that the (cid:2) 3cm-1 3-NO band showed two overlap”
Lu 等 - 2008 - Molecular events in deliquescence and efflorescenc DOI: 10.1063/1.2973623(cid:5) -
pouzdanost 1,0
“Not identified by CR isotope labeling of the of lysine, but was assigned to a related mode cm-1 with the 1348 band of BR.”
Maeda 等 - 1999 - Chromophore-protein-water interactions in the L in DOI: 10.1021/bi9907072 -
Protein pouzdanost 1,0
“Stained sections were 1348cm1 and associated with collagen as well as the peak at”
Maribel Mata-Miranda 等 - 2019 - Characterization of the Biological Fingerprint and DOI: 10.1155/2019/1241452 -
Amide pouzdanost 1,0
“0.0001 1452.136 1451.171 8 3 str 0.506 1401.995 9 1401.995 -COOC=O of 0.036 1345.106 10 Carboxyl groups COO and asymmetric C-N stretching 1347.998 3-)”
Martinez-Cuazitl 等 - 2023 - Clinical, Biochemical, and ATR-FTIR Spectroscopic DOI: 10.1155/2023/3423183 -
pouzdanost 1,0
“Explicit assignment: 'characteristic peaks at ~1348 cm-1 (D band)'.”
Effect of Iron Loading on the Catalytic Activity of Fe/N-Doped Reduced Graphene Oxide Catalysts via Irradiation DOI: 10.3390/app11010205 -
N-O bond pouzdanost 1,0
“The band experienced at 1348 can be attributed adsorption capacity of activated carbon for the adsorption to the N - O symmetric stretch in the nitro compounds.”
Rutto 等 - 2019 - Adsorption of lead ions onto chemically activated DOI: 10.24425/aep.2019.130245 -
Hydroxyl (O-H) pouzdanost 1,0
“[37] found that the ATR-FTIR spectra of 2O 3-adsorbed 1617 cm-1, 1458 cm-1, and 436 cm-1, respectively, indicating that Fe-O, CH3/COO and -OH in HFO cm-1 humic acid showed two new bands at 1348 and 1470 during the initial time points, which”
Removal of Tetracycline by Hydrous Ferric Oxide: Adsorption Kinetics, Isotherms, and Mechanism DOI: 10.3390/ijerph16224580
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