What absorbs at 3738 cm⁻¹ in an FTIR spectrum?
A band near 3738 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 3738 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 |
|---|---|---|---|
| Hydroxyl (O-H) | 4 | 4 | 1,0 |
| Silanol (Si-OH) | 2 | 2 | 1,0 |
| Silicon-oxygen (Si-O) | 2 | 1 | 1,0 |
| Silicon (Si) | 2 | 1 | 1,0 |
| Aromatic ring | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 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 |
|---|---|---|---|
| silica | 3738, 1100, 1080 | Silicon-oxygen (Si-O), Silicon (Si), Hydroxyl (O-H) | 1 |
| magnetite | 3738, 1740, 1263 | Hydroxyl (O-H), Silicon-oxygen (Si-O) | 1 |
| zeolite | 3738, 1013, 1245 | Hydroxyl (O-H), Silicon-oxygen (Si-O), Silicon (Si) | 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 3738 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
-
Hydroxyl (O-H) pouzdanost 1,0
“In addition, three additional pronanoshapes preserved their shapes during reaction, The CeO 2 cm(cid:2)1 are obnounced hydroxyl bands at 3738, 3602, and 3253 as evident from TEM images of samples after reaction (see the served for cubes.”
Exposed Surfaces on ShapeControlled Ceria Nanoparticles Revealed through ACTEM and WaterGas Shift Reactivity DOI: 10.1002/cssc.201300651 -
Silanol (Si-OH) pouzdanost 1,0
“cm-1 3261 as well as one negative band at 3738 The FTIR band at 3738 is attributed to internal silanol groups in line with earlier works [49].”
Baran 等 - 2016 - Influence of the nature and environment of cobalt DOI: 10.1016/j.micromeso.2015.12.061 -
Hydroxyl (O-H) pouzdanost 1,0
“In the OH stretching region one can see the band at 3738, which at 77K reveals a structure of three”
Belykh 等 - 2019 - Deep insight into CO adsorption on Ni-USY zeolite DOI: 10.1016/j.apcata.2019.117140 -
Carboxyl (COOH) pouzdanost 1,0
“The FTIR spectrum of MB shows the newly appeared cm-1 band at 3738 due to bridging and bidentate coordination between the carboxyl group of boswellic acid and Fe Fig.”
Eco-friendly adsorbents based on abietic acid, boswellic acid, and chitosan/magnetite for removing waste oil from the surface of the water DOI: 10.1007/s11356-022-20169-2 -
Silicon (Si) pouzdanost 1,0
“S5), showing only one band at 3738 cm-1 in the O-H region characteristic of terminal Si-OH group (Deka et al., 1998).”
Hamoud 等 - 2019 - Photo-assisted SCR over highly dispersed silver su DOI: 10.1016/j.apcatb.2019.02.022 -
Aromatic ring pouzdanost 1,0
“Explicit assignment in text: 'wave number of 3738.05 refers to aromatic group cm-1 (C-H)'”
Maruddin 等 - 2022 - Effects of drying methods and acidic strength on p DOI: 10.15586/ijfs.v34i1.2010 -
pouzdanost 1,0
“8 of large amounts terminal silanol group (Si-O-H) located at internal and external 9 cm-1 surface of FS by a detectable intense peak at 3738 [73].”
Modified fibrous silica for enhanced carbon dioxide adsorption: Role of metal oxides on physicochemical properties and adsorption performance DOI: 10.1016/j.apcatb.2018.11.040
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.