What absorbs at 3297 cm⁻¹ in an FTIR spectrum?
A band near 3297 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
Hiter odgovor
A band near 3297 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 |
|---|---|---|---|
| N h | 5 | 4 | 1,0 |
| Hydroxyl (O-H) | 3 | 3 | 1,0 |
| Amide | 3 | 3 | 1,0 |
| Secondary amine | 2 | 1 | 1,0 |
| Protein | 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 |
|---|---|---|---|
| PVA | 3297, 1660, 2930 | Hydroxyl (O-H), Amide | 1 |
| honey | 3297, 2005, 1199 | Hydroxyl (O-H), Amide | 1 |
| silver nanoparticles | 3297, 1636, 1631 | Hydroxyl (O-H), Amide, N 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 3297 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
“The band at 3297 is assigned to amide”
Gupta 等 - 2022 - In vitro cell composition identification of wood d DOI: 10.1098/rsos.201935 -
Amide zaupanje 1,0
“The amide A band was located at 3297 associated with cm-1 the stretch vibration of the N-H group.”
Green Synthesis of Silver Nanoparticles for Preparation of Gelatin Films with Antimicrobial Activity DOI: 10.3390/polym14173453 -
zaupanje 1,0
“sin4 1.81 N-H bend 1179 137 N-H(cid:5)(cid:5)(cid:5) stretching 3297 263 N-H stretching 3343”
Ay 和 Aydinli - 2004 - Comparative investigation of hydrogen bonding in s DOI: 10.1016/j.optmat.2003.12.004 -
Secondary amine zaupanje 1,0
“and N-H stretching of primary and secondary amines at 3297 Amide bands are: C=O”
Haramina 等 - 2019 - EFFECT OF WEATHERING ON DYNAMIC MECHANICAL PROPERT DOI: 10.21278/TOF.43401 -
Hydroxyl (O-H) zaupanje 1,0
“cm-1, Analysing Dragon's Blood, Figure 4, there were bands at 3297 possibly due to OH groups vibracm-1 cm-1, tions [20];”
Oliveira 等 - 2016 - FTIR analysis and quantification of phenols and fl DOI: 10.1590/S1517-707620160003.0072 -
Hydroxyl (O-H) zaupanje 1,0
“The N-H deformation and C-N stretchin PVA, with the main peako bserved in FTIR spectra at ing vibrations (amide II) of peptides, enzymes, and other cm-1 cm-1 wavenumbers 3297 (O-H stretching) and 2922 hemolymph protein-based constituents oc”
Nigella/honey/garlic/olive oil co-loaded PVA electrospun nanofibers for potential biomedical applications DOI: 10.1007/s40204-022-00207-5 -
N h zaupanje 0,9
“N-H vibration”
Comparison of Different Methods for Spongin-like Collagen Extraction from Marine Sponges (Chondrilla caribensis and Aplysina fulva): Physicochemical Properties and In Vitro Biological Analysis DOI: 10.3390/membranes11070522 -
Hydroxyl (O-H) zaupanje 0,8
“Peak at 3297 attributed to O-H stretch”
El Mohtadi 等 - 2020 - DIFFERENTIAL ENGULFMENT OF STAPHYLOCOCCUS AUREUS A DOI: 10.17179/excli2020-2766
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