What absorbs at 3066 cm⁻¹ in an FTIR spectrum?
A band near 3066 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
Hiter odgovor
A band near 3066 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 | 4 | 4 | 1,0 |
| Carbonyl (C=O) | 1 | 1 | 1,0 |
| Alkene (C=C) | 1 | 1 | 1,0 |
| Aromatic ring | 1 | 1 | 1,0 |
| Silicon-oxygen (Si-O) | 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 |
|---|---|---|---|
| polyurethane | 3066, 2270, 1700 | Alkyl C-H, Carbonyl (C=O) | 1 |
| gelatin | 3066, 1652, 3300 | Alkyl C-H, Carbonyl (C=O) | 1 |
| TiO2 | 3066, 1700, 1093 | Alkyl C-H | 1 |
| TiO | 3066, 1730, 1699 | Alkyl C-H | 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 3066 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
-
Silicon-oxygen (Si-O) zaupanje 1,0
“In is a purplecolorvarietyof Quartz duetothe presenceof iron addition to this, strong bands were observed at 2924 and 3066cm-1, impurities, therefore, some of its FTIR bands can be corwhich are always present in Quartz according to related”
Ahmad 等 - 2021 - Spectroscopic Analysis for Harnessing the Quality DOI: 10.1155/2021/6629640 -
Alkyl C-H zaupanje 1,0
“Two weak bands superimposed to this broad cm-1, which are ascribed to the C-H stretching vibrations of absorption appear at 3066 and 3033 cm-1 the aromatic ring of the alcohol.”
Augugliaro 等 - 2008 - Photocatalytic oxidation of aromatic alcohols to a DOI: 10.1016/j.apcata.2008.07.038 -
Aromatic ring zaupanje 1,0
“aromatic-based PU samples while there is only one small band in the similar wavenumber range in 3066cm-1 can be attributedto the overtoneof two non-aromatic-basedPUs.”
Jiang 等 - 2018 - Synthesis and structureproperties characterizatio DOI: 10.1098/rsos.180536 -
Alkene (C=C) zaupanje 1,0
“3 Moving on to longer-wavelength regions, one should also mention the =C-H stretching cm-1 (trans-transformation) vibrations with the maximum at ~3066 (Table 9), originating from the vibrations of triglyceride fractions.”
Comparative Analysis of Phytochemicals and Antioxidant Properties of Borage Oil (Borago officinalis L.) and Milk Thistle (Silybum marianum Gaertn) DOI: 10.3390/app13042560 -
Carbonyl (C=O) zaupanje 1,0
“2969 1600-1700 cm-1 is mainly associated with the stretching 3066 vibrations of the carbonyl groups (C=O bond) along 0,4 4000 3500 3000 2500 2000 1500 1000 500 the polypeptide backbone [15,23,50] and is a sensitive”
Radev 等 - 2009 - OrganicInorganic bioactive materials Part III in DOI: 10.2478/s11532-009-0078-z -
Alkyl C-H zaupanje 1,0
“C-H stretching -CH3 (saturation) - 2900-3000 C-H stretching 3066 C-H stretching (aromatic ring) 3066 C-H stretching (aromatic ring)”
Thermal Decomposition Behavior of Hydroxytyrosol (HT) in Nitrogen Atmosphere Based on TG-FTIR Methods DOI: 10.3390/molecules23020404 -
Alkyl C-H zaupanje 0,9
“Text: 'CH (3066, 2927)'”
Barakat 等 - 2020 - Synthesis, X-ray Single Crystal, Conformational An DOI: 10.3390/cryst10020120
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