What absorbs at 3232 cm⁻¹ in an FTIR spectrum?
A band near 3232 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 3232 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 |
|---|---|---|---|
| Carbonate | 3 | 3 | 1,0 |
| Secondary amine | 2 | 2 | 1,0 |
| N h | 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 |
| Nitro (NO2) | 1 | 1 | 1,0 |
| Fluorine (C-F) | 1 | 1 | 1,0 |
| C n single bond | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| Metal hydroxyl | 1 | 1 | 0,9 |
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 |
|---|---|---|---|
| diamond | 3232, 1378, 1332 | Secondary amine, Methoxy (OCH3) | 1 |
| calcium carbonate | 3232, 2954, 1320 | Carbonate, Methoxy (OCH3) | 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 3232 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
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Hydroxyl (O-H) vertrouwen 1,0
“These features dominant peak at 3309 with two subordinate peaks at 3232 and 3184 These were revealed by FTIR analysis and were found to be related to the structural OH groups features were revealed by FTIR analysis and were found to be rela”
Wang 和 Takahashi - 2023 - Development of Mid-Infrared Absorption Spectroscop DOI: 10.3390/min13050625 -
vertrouwen 1,0
“complex, the same bands were observed at 3232 and Our results revealed that L1, Pt(II)L1 and Pt(II)L2 had cm(cid:2)1 3136 which shifts to lower frequency by 128 and a cytotoxic effect on the human retinoblastoma cell line cm(cid:2)1 53 as c”
Synthesis and in vitro activity of platinum(II) complexes of two fluorenylspirohydantoins against a human tumour cell line DOI: 10.1080/13102818.2014.910363 -
Carbonate vertrouwen 1,0
“42significant the FTIR spectrum shows the powder material to be dehyAs no other HPO peaks were observed in the droxylated (due to the diminished OHpeaks) and conFTIR spectra for the HAp powder, it would be suggested 3232cm-1 taining carbona”
The deposition of strontium and zinc Co-substituted hydroxyapatite coatings DOI: 10.1007/s10856-017-5846-2 -
N h vertrouwen 1,0
“General procedure for the synthesis of 7-hydroxy-4-phenylquinoline cm(cid:2)1): 3462.01, 3376.59, 3336.67 (NH2, hexane (7:3)), FTIR (KBr disc, derivatives (5a-o) (C(cid:3)N), NH stretch), 3231.58, 3186.68, 3066.43 (Ar CH), 2192.36”
7-Hydroxy-4-phenyl-1, 2-dihydroquinoline derivatives: synthesis via one-pot, three-component reaction and structure elucidation DOI: 10.1016/j.heliyon.2020.e05035 -
N h vertrouwen 1,0
“215(cid:3)C 218(cid:3)C, 13C-NMR 2), 4.58 (s, 1H, Hd), (75 MHz, DMSOOff white solid, Yield: 65%, m.p: to Rf: 0.69 2H, NH cm-1): δ n-hexane 6) 160.9(C4), 149.3 (C7, C6), 146.1 (C14), 131.6 (C12), d [Acetone: (7:3)], FTIR (KBr disk, 129.9 (C1”
Development of an Efficient, One-Pot, Multicomponent Protocol for Synthesis of 8-Hydroxy-4-Phenyl-1,2-Dihydroquinoline Derivatives DOI: 10.1002/jhet.4193 -
Carbonate vertrouwen 1,0
“The main calcite bands are centered The 3232at ~2514 [ν1 (CO results of enzymatic analyses also denied the presence of sucrose in symmetric stretching) + ν3 (CO asymmetric”
Zhang 等 - 2020 - CONTRIBUTION OF ENZYMATIC METHOD FOR ANALYZING SUC DOI: 10.21577/0100-4042.20170561 -
Carbonate vertrouwen 1,0
“Herit Sci (2021) 9:4 Page 9 of 15 Table 6 FTIR band assignment of calcite, tile dust and sticky rice powder (cm-1) Wavenumber Band assignment 3232symmetric stretching) ν3 (CO asymmetric stretching) and/or 2ν2 (O-C-O out-of-plane Calcite ~ 2”
Zhang 等 - 2021 - Effects of sticky rice addition on the properties DOI: 10.1186/s40494-020-00475-z -
Metal hydroxyl vertrouwen 0,9
“Side peaks at 3232 and 3185 are part of the 3309 cm-1 series assigned as -Ti-OH stretching.”
Phlayrahan 等 - 2018 - Fe oxidation state in heat-treated basaltic blue s DOI: 10.1088/1742-6596/1144/1/012057
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