What absorbs at 3047 cm⁻¹ in an FTIR spectrum?
A band near 3047 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
Hiter odgovor
A band near 3047 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.
Možne dodelitve funkcionalnih skupin
| Funkcionalna skupina | Podporna dejstva | Citirani viri | Najvišje zaupanje |
|---|---|---|---|
| Alkyl C-H | 3 | 3 | 1,0 |
| Aromatic ring | 2 | 2 | 1,0 |
| Amide | 1 | 1 | 1,0 |
| Amino acid | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| Alkene (C=C) | 1 | 1 | 1,0 |
Razvrstitev odraža zbrane literaturne dokaze, ne enega avtoritativnega pravila. Vedno preverite glede na kontekst vašega vzorca.
Možni materiali
| Material | Podporni vrhovi | Prekrivajoče se skupine | Citirani viri |
|---|---|---|---|
| biomass | 3047, 1082, 1282 | Alkyl C-H, Aromatic ring, Amide | 1 |
| coal | 3047, 1600, 3030 | Alkyl C-H, Aromatic ring | 1 |
Materiali so prikazani le, ko ista literaturna podlaga podpira ta pas in vsaj en 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 3047 cm⁻¹ is usually not enough for material identification by itself.
Uporaba v resničnem svetu
Ta vrsta poizvedbe je pogosta pri identifikaciji polimerov, pregledovanju neznanih plastičnih mas, odpravljanju težav pri QC, preverjanju recikliranih materialov in literaturno podprtem pregledu dodelitev vrhov.
Pogoste napake
- Obravnavanje enega izoliranega pasu kot dokaza o materialu brez preverjanja vsaj enega ali dveh podpornih vrhov.
- Ignoriranje prekrivanja: več funkcionalnih skupin lahko prispeva blizu istega valovnega števila.
- Izpuščanje validacije, ko lahko dodatki, mešanice, oksidacija ali kontaminacija popačijo spekter.
Nasvet za preverjanje
Ko ostaja dvoumnost, potrdite hipotezo z DSC, GC-MS ali TGA, zlasti za mešanice, degradirane vzorce in polnjene polimere.
Literatura za temi dodelitvami
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Alkyl C-H zaupanje 1,0
“The spectrum for 1-MN, shown in Figure 2b, exhibited the aromatic cm-1, cm-1, C-H stretching band at 3047 the aliphatic C-H stretching band at 2980-2870 as well as cm-1.”
Ketren 等 - 2019 - Investigation on Conversion Pathways in Degradativ DOI: 10.3390/en12030528 -
Alkyl C-H zaupanje 1,0
“FTIR spectra of control perylene (Fig.7a) showed the -1 charactereristic absorption peaks at 3047 cm (=CH stretch in -1 aromatic rings), 2850.79-2953.02 cm (C-H stretching in cyclic -1 Fig.”
Mandal 和 Das - 2018 - Biodegradation of perylene and benzo [ghi] perylen DOI: 10.22438/jeb/39/1/MRN-540 -
Alkene (C=C) zaupanje 1,0
“1,6-Bis[4-(naphthyliminomethylidene)-phenoxy]-hexane cm-1): ν, FTIR (KBr, 3047 (=C-H stretch of the aromatic rings), 2941-2856 (C-H stretch of aliphatic chains), 1618 (-N=CHstretch), 1605, 1565, 1513 (C-C ring stretch), 1246, 1H-NMR 1166 (C”
Mesomorphic Behavior of Symmetric Azomethine Dimers Containing Different Chromophore Groups DOI: 10.3390/molecules26082183 -
zaupanje 1,0
“The typically broad band centered at 3159 such as acetic, citric and butyric acids) (Shumilina et al., 2020), the mainly correN\\H C_O cm-1 signal at 1666 sponds to the stretch in peptides and amino acids (the shoulder can correspond to the”
Comprehensive characterization of industrial wastewaters using EEM fluorescence, FT-IR and 1H NMR techniques DOI: 10.1016/j.scitotenv.2021.150417
Imate spekter s tem pasom?
Naložite svoj FTIR spekter in v nekaj sekundah pridobite celotno poročilo o interpretaciji — dodelitve vrhov z literaturnimi citati, ujemanja knjižnice in verigo dokazov z oceno zaupanja.