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
Ateb cyflym
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.
Aseiniadau grŵp swyddogaethol posibl
| Grŵp swyddogaethol | Ffeithiau ategol | Ffynonellau a ddyfynnwyd | Hyder uchaf |
|---|---|---|---|
| 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 |
Mae＇r safle＇n adlewyrchu tystiolaeth llenyddiaeth gronnwyd, nid rheol awdurdodol sengl. Cadarnhewch bob amser yn erbyn eich cyd-destun sampl.
Deunyddiau posibl
| Deunydd | Copaon ategol | Grwpiau sy＇n gorgyffwrdd | Ffynonellau a ddyfynnwyd |
|---|---|---|---|
| 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 |
Mae deunyddiau＇n cael eu dangos dim ond pan fydd yr un gronfa lenyddiaeth yn cefnogi＇r band hwn ac o leiaf un brig nodweddiadol ychwanegol.
Rhesymeg sbectrwm
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.
Defnydd yn y byd go iawn
Mae＇r math hwn o ymholiad yn gyffredin mewn adnabod polymer, sgrinio plastig anhysbys, datrys problemau QC, dilysu deunydd wedi＇i ailgylchu, ac adolygiad o aseiniad copa wedi＇i gefnogi gan lenyddiaeth.
Camgymeriadau cyffredin
- Trin un band ynysig fel prawf o ddeunydd heb wirio o leiaf un neu ddau gopa cefnogol.
- Anwybyddu gorgyffwrdd: gall grwpiau swyddogaethol lluosog gyfrannu ger yr un rhif ton.
- Hepgor dilysu pan fo ychwanegion, cymysgeddau, ocsideiddio, neu halogiad yn gallu ystumio＇r sbectrwm.
Cyngor dilysu
Pan fo amwysedd yn parhau, dilyswch y rhagdybiaeth gyda DSC, GC-MS, neu TGA, yn enwedig ar gyfer cymysgeddau, samplau dirywiedig, a pholymerau llawn.
Llenyddiaeth y tu ôl i＇r aseiniadau hyn
-
Amide hyder 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 hyder 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 -
hyder 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 hyder 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) hyder 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) hyder 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 hyder 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) hyder 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
Oes gennych sbectrwm gyda＇r band hwn?
Llwythwch eich sbectrwm FTIR i fyny a chael adroddiad dehongli llawn — aseiniadau brig gyda chyfeiriadau llenyddiaeth, cyfateb llyfrgell, a chadwyn dystiolaeth â gradd hyder — mewn eiliadau.