What absorbs at 3057 cm⁻¹ in an FTIR spectrum?
A band near 3057 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 3057 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 |
| Aromatic ring | 2 | 2 | 1,0 |
| Methoxy (OCH3) | 1 | 1 | 1,0 |
| Methacrylate | 1 | 1 | 1,0 |
| C-O single bond | 1 | 1 | 1,0 |
| Acetate | 1 | 1 | 1,0 |
| Hydrogen bond | 1 | 1 | 1,0 |
| Carbonyl (C=O) | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
Razvrstitev odraža zbrane literaturne dokaze, ne enega avtoritativnega pravila. Vedno preverite glede na kontekst vašega vzorca.
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 3057 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
-
Amide zaupanje 1,0
“irradiation with Co gamma rays and the spectrum changed cm-1) cmBoth amide A (3323 and amide B band (3057 notably as a function of doses.”
Bessalah 等 - 2023 - Effect of Gamma Radiation on Novel Gelatin Extract DOI: 10.17582/journal.pjz/20220218020207 -
zaupanje 1,0
“Characteristic bands at 3460, 3363, 3196 and 3057 cm-1 due to stretching vibrations of the amine group in the physical mixture”
Garbacz 等 - 2020 - Structural Characterization of Co-Crystals of Chlo DOI: 10.3390/pharmaceutics12070648 -
Carbonyl (C=O) zaupanje 1,0
“The FT-IR spectrum of monomer 3c has been shown in in the multitude of weak but cumulatively important C-H cm-1 Figure 1 which showed the distinct band at 1687 … O, C-H … π and π … π stacking interactions in the crysthat can be assigned to”
Liquid phase synthesis of aromatic poly(azomethine)s, their physicochemical properties, and measurement of ex situ electrical conductivity of pelletized powdered samples DOI: 10.1080/15685551.2016.1231042 -
Alkyl C-H zaupanje 1,0
“it suggested that in skin cm-1 3007 was due to the symmetric ch stretching and 2 cancer most of the hydrogen bonds in the c-o groups of cell cm-1 asymmetric stretching modes shifted at 3057 in the breast proteins disappeared, as well as con”
Simonova 和 Karamancheva - 2013 - APPLICATION OF FOURIER TRANSFORM INFRARED SPECTROS DOI: 10.5504/BBEQ.2013.0106 -
Alkyl C-H zaupanje 1,0
“cm-1-N-H For unirradiated CIP, the characteristic vibrations are: 3390 stretchcm-1-stretching ing vibration (piperazinyl), 3057 C-H stretching vibration (aromatic”
Optical Characterization of Ciprofloxacin Photolytic Degradation by UV-Pulsed Laser Radiation DOI: 10.3390/molecules26082324 -
Alkyl C-H zaupanje 0,9
“Explicit assignment: 'assigned to CH asymmetric'.”
Optical Absorption and Visible Photoluminescence from Thin Films of Silicon Phthalocyanine Derivatives DOI: 10.3390/ma7096585 -
zaupanje 0,7
“Snippet: 'asymmetric stretching at 3057 groups, the ¼¼CH'”
Aresta 等 - 2012 - Initiated-chemical vapor deposition of organosilic DOI: 10.1116/1.4711762
Imate spekter s tem pasom?
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