What absorbs at 3462 cm⁻¹ in an FTIR spectrum?
A band near 3462 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
Snel antwoord
A band near 3462 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.
Mogelijke functionele-groeptoewijzingen
| Functionele groep | Ondersteunende feiten | Geciteerde bronnen | Hoogste vertrouwen |
|---|---|---|---|
| Hydroxyl (O-H) | 5 | 5 | 1,0 |
| Water (H2O) | 1 | 1 | 1,0 |
| Carbonyl (C=O) | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
Ranglijst weerspiegelt cumulatief literatuurbewijs, niet één gezaghebbende regel. Bevestig altijd aan de hand van uw monsterecontext.
Mogelijke materialen
| Materiaal | Ondersteunende pieken | Overlappende groepen | Geciteerde bronnen |
|---|---|---|---|
| chitosan | 3462, 1650, 1655 | Amide, Hydroxyl (O-H) | 2 |
| PVP | 3462, 2983, 1648 | Hydroxyl (O-H), Amide, Carbonyl (C=O) | 1 |
| Fe3O4 | 3462, 2358, 1673 | Hydroxyl (O-H), Amide | 1 |
| pectin | 3462, 1746, 1150 | Hydroxyl (O-H), Amide, Carbonyl (C=O) | 1 |
Materialen worden alleen getoond wanneer dezelfde literatuurpool deze band en ten minste één extra karakteristieke piek ondersteunt.
Spectrumlogica
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 3462 cm⁻¹ is usually not enough for material identification by itself.
Gebruik in de praktijk
Dit type query komt vaak voor bij polymeeridentificatie, screening van onbekende kunststoffen, probleemoplossing bij QC, verificatie van gerecycled materiaal en literatuurondersteunde beoordeling van piektoewijzing.
Veelgemaakte fouten
- Het behandelen van een enkele geïsoleerde band als bewijs van een materiaal zonder ten minste een of twee ondersteunende pieken te controleren.
- Overlap negeren: meerdere functionele groepen kunnen bijdragen rond hetzelfde golfgetal.
- Validatie overslaan wanneer additieven, mengsels, oxidatie of verontreiniging het spectrum kunnen verstoren.
Advies voor verificatie
Wanneer dubbelzinnigheid blijft bestaan, valideer de hypothese met DSC, GC-MS of TGA, vooral voor mengsels, gedegradeerde monsters en gevulde polymeren.
Literatuur achter deze toewijzingen
-
Hydroxyl (O-H) vertrouwen 1,0
“WavenumAssignment (cm-1) ber 3451 Stretching (O-H) 3462 Stretching (O-H) 2) 2945 Asymmetric stretching (CH 2) 2943 Asymmetric stretching (CH”
Experimental and DFT studies on the structural and optical properties of chitosan/polyvinyl pyrrolidone/ZnS nanocomposites DOI: 10.1007/s00289-023-04700-0 -
Hydroxyl (O-H) vertrouwen 1,0
“cm-1, For the spectrum of free eugenol, a characteristic band is observed around 3462 referring to the O-H cm-1 bond in 2838 the absorption peak corresponds to the stretching of the C-H bond.”
Bruckmann 等 - 2022 - Synthesis, Characterization, and Biological Activi DOI: 10.21203/rs.3.rs-1025029/v1 -
Hydroxyl (O-H) vertrouwen 1,0
“The NH2 amino groups had a characteristic peak near enzymolysis should be operated at a chitosan concentration below 10.5 g/L, which is close to the 3462 cm-1, which was overlapping by the peak due to the -OH group [23].”
Optimization and Characterization of Chitosan Enzymolysis by Pepsin DOI: 10.3390/bioengineering3030017 -
vertrouwen 1,0
“The bands in 3520 and cm-1 3462 correspond to the stretching of N-H;”
Larrosa 等 - 2018 - Spirulina sp biomass drieddisrupted by different DOI: 10.1007/s10068-018-0397-y -
Secondary amine vertrouwen 1,0
“CeH 21.56 53.51 11.39 stretch Alkanes 3462e3472 NeH OeH 9.26 45.52 8.26 stretch, primary, secondary amines, amides, Hebonded stretch, alcohols, phenols 4396 2022;21:4386e4397 journal of materials research and technology”
Loto - 2022 - Analysis of the protection performance of admixed DOI: 10.1016/j.jmrt.2022.11.048 -
Amide vertrouwen 1,0
“The spectra of CS-PEC G shifted to 3462 whereas the peaks attributed to amide I, II as well as to the carbonyl”
Preliminary Evaluation of 3D Printed Chitosan/Pectin Constructs for Biomedical Applications DOI: 10.3390/md19010036 -
Hydroxyl (O-H) vertrouwen 1,0
“The broad band around 3462 cm-1 (spectrum 1) and respectively 3459 (spectrum 2) may be attributed to -OH stretching vibrations of adsorbed water molecules overlapped with -OH stretching vibrations of surface silanols [31-33].”
Muresan 等 - 2014 - Hard porous chromium containing macrospheres as ne DOI: 10.2478/s11532-013-0403-4 -
Hydroxyl (O-H) vertrouwen 0,8
“Peaks attributed to OH incorporation.”
Zhang 等 - 2017 - Mechanisms of Incorporation of Hydroxyl in Coesite DOI: 10.1166/jnn.2017.14519
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