What absorbs at 3414 cm⁻¹ in an FTIR spectrum?
A band near 3414 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
Quick answer
A band near 3414 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.
Possible functional-group assignments
| Functional group | Supporting facts | Cited sources | Top confidence |
|---|---|---|---|
| Hydroxyl (O-H) | 12 | 11 | 1.0 |
| N h | 6 | 6 | 1.0 |
| Alkyl C-H | 2 | 2 | 1.0 |
| Amide | 2 | 2 | 1.0 |
| Carboxyl (COOH) | 2 | 2 | 1.0 |
| Secondary amine | 1 | 1 | 1.0 |
| Methacrylate | 1 | 1 | 1.0 |
| Ketone | 1 | 1 | 1.0 |
| Ester | 1 | 1 | 1.0 |
| Carbonyl (C=O) | 1 | 1 | 1.0 |
| Acetate | 1 | 1 | 1.0 |
| Silanol (Si-OH) | 1 | 1 | 1.0 |
| Hydrogen bond | 1 | 0 | 1.0 |
Ranking reflects accumulated literature evidence, not a single fixed rule. Always confirm against your sample context.
Possible materials
| Material | Supporting peaks | Overlapping groups | Cited sources |
|---|---|---|---|
| ZnO | 3414, 1400, 3430 | Hydroxyl (O-H), Alkyl C-H, Amide | 2 |
| Fe2O3 | 3414, 1130, 1631 | Hydroxyl (O-H), Alkyl C-H, Amide | 1 |
| PVP | 3414, 2983, 1648 | Alkyl C-H, Hydroxyl (O-H), Amide | 1 |
Materials are shown only when the same literature pool supports this band and at least one additional characteristic peak.
Spectrum logic
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 3414 cm⁻¹ is usually not enough for material identification by itself.
Real-world usage
This type of query is common in polymer identification, unknown plastic screening, QC troubleshooting, recycled-material verification, and literature-backed peak assignment review.
Common mistakes
- Treating one isolated band as proof of a material without checking at least one or two supporting peaks.
- Ignoring overlap: multiple functional groups can contribute near the same wavenumber.
- Skipping validation when additives, blends, oxidation, or contamination may distort the spectrum.
Verification advice
When ambiguity remains, validate the hypothesis with DSC, GC-MS, or TGA, especially for blends, degraded samples, and filled polymers.
Literature behind these assignments
-
Hydroxyl (O-H) confidence 1.0
“LLM confirmed rule peak-group candidate”
Physicochemical properties of starches with variable amylose contents extracted from bambara groundnut genotypes DOI: 10.1016/j.carbpol.2015.06.100 -
confidence 1.0
“As mentioned before, L-tryptophan and ion probably 3 ~3414cm-1 (-N-H Bands located at stretching in the generate the overlap of their corresponding bands, although justified amine group) and broad bands at ~3037, ~2863, ~2579, and this fact”
Palomino Merino 等 - 2018 - Influence of L-Tryptophan on Growth and Optical Pr DOI: 10.1155/2021/6821974 -
Silanol (Si-OH) confidence 1.0
“The displacement of the wavenumber indicates >Si-OH-Al< stretching vibration of groups [33], that the combined capacities of the Si and O atoms are cm-1 the peak at 3475.56 was attributed to the stretching reduced and the influence of the A”
Effects of BaCl2 on K-feldspar flotation using dodecyl amine chloride under natural pH DOI: 10.1016/S1003-6326(18)64878-2 -
confidence 1.0
“The recorded the absorption peaks at wave number of 3414, 2945 and cm21 atomic percentages of Zn and O were approximately 50.13% and 1646 were assigned to N-H, C-H and C=O stretching 49.87%, respectively.”
Al-Hada 等 - 2014 - A facile thermal-treatment route to synthesize ZnO DOI: 10.1371/journal.pone.0103134 -
confidence 1.0
“This band around 3414 can be assigned to the N-H stretching of”
Amino Surface Modification and Fluorescent Labelling of Porous Hollow Organosilica Particles: Optimization and Characterization DOI: 10.3390/ma15072696 -
Hydroxyl (O-H) confidence 1.0
“LLM confirmed rule peak-group candidate”
Baykal 等 - 2010 - Sonochemical synthesis and chracterization of Mn3O DOI: 10.2478/s11532-010-0037-8 -
Hydroxyl (O-H) confidence 1.0
“The samples show cm-1 at 3413.80 because of stretching vibration of O-H the nine distinctive Fe 2O peaks at 16.27 (111), 27.2 (211), 3 cm-1 bond in free water.”
Harati 等 - 2022 - Enhanced photocatalytic activity of Fe2O3@ZnO deco DOI: 10.1007/s40201-021-00758-y -
Hydroxyl (O-H) confidence 1.0
“3414cm-1 determined using XRD analysis and X′ Pert Pr instrument thesized Au NPs, shows peaks at (O-H stretch), 2924cm-1 1618cm-1 � acting at the voltage of 40KV and current of 30MA with 2954 and (C-H stretch), (C O”
Korani 等 - 2021 - Evaluation of Antimicrobial and Wound Healing Effe DOI: 10.1155/2021/7019130
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