What absorbs at 3467 cm⁻¹ in an FTIR spectrum?
A band near 3467 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 3467 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) | 4 | 4 | 1.0 |
| N h | 4 | 3 | 1.0 |
| Amide | 1 | 1 | 1.0 |
| Amine primary | 1 | 1 | 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 |
|---|---|---|---|
| polypropylene | 3467, 1030, 1600 | Hydroxyl (O-H), Amide | 1 |
| Chitosan-Based | 3467, 2924, 1743 | Hydroxyl (O-H), N h, Amide | 1 |
| TiO2 | 3467, 1700, 1093 | Hydroxyl (O-H) | 1 |
| ZnO | 3467, 1400, 3430 | Hydroxyl (O-H), Amide | 1 |
| Chitosan | 3467, 1650, 1655 | Amide, Hydroxyl (O-H), N h | 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 3467 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
“The characteristic peaks of CS (CH stretching), 1743 cm-1 (C=O stretching band), 1464 cm-1 (-CH2-bending), 1377 cm-1 (- cm-1 cm-1 cm-1 NPs were found at 3467 (OH stretching), 1655 (amide I stretching), 1541 CH3 bending), and 964 cm-1 (C=C s”
Chitosan-Based Anti-Oxidation Delivery Nano-Platform: Applications in the Encapsulation of DHA-Enriched Fish Oil DOI: 10.3390/md19080470 -
confidence 1.0
“Under D 2O hydration, vibrational bands in the 4000-2700 region (X-H stretching vibration) originate from H-D, which are unexchangeable O-H and N-H stretching vibrations cm-1 (+)/3467 (-) of amino acids that are involved in a hydrophobic en”
Spectral Tuning Mechanism of Primate Blue-sensitive Visual Pigment Elucidated by FTIR Spectroscopy DOI: 10.1038/s41598-017-05177-4 -
confidence 1.0
“(cm(cid:2)1) (cm(cid:2)1) Group Vibration N-H (primary amine) Stretching 3467 3464”
Merline 等 - 2013 - Melamine formaldehyde curing studies and reaction DOI: 10.1038/pj.2012.162; -
Hydroxyl (O-H) confidence 1.0
“Broad cm-1 peak located at 3467 in the Co-MOF represents O-H stretching vibrations.”
Naseem 等 - 2022 - Synthesis and Application of Cobalt-based Metal-or DOI: 10.15255/CABEQ.2021.1960 -
Hydroxyl (O-H) confidence 1.0
“LLM confirmed rule peak-group candidate”
Sorption and Photocatalysis of Dyes on an Oil-Based Composite Enriched with Nanometric ZnO and TiO2 DOI: 10.3390/su151511874 -
N h confidence 1.0
“cm-1 3466.77 representing the stretching vibrations of Bacterial silver nanoparticles have shown excellent cm-1 amines while band at 1637.88 represented phenyl ring antimicrobial activity against all bacterial strains used.”
Wagi 和 Ahmed - 2020 - Bacterial nanobiotic potential DOI: 10.1515/spma-2019-0001 -
Amide confidence 1.0
“(cm-1) 3307 amide A and amide B band originating 3467 3294 from a Fermi resonance between the N-H”
Application of FTIR Spectroscopy to Detect Changes in Skeletal Muscle Composition Due to Obesity with Insulin Resistance and STZ-Induced Diabetes DOI: 10.3390/ijms232012498 -
Hydroxyl (O-H) confidence 0.9
“Explicit assignment in text: 'peaks at 3467 ... corresponding to the stretching ... vibrations of hydroxyl group (v O-H)'”
Dong 等 - 2012 - Preparation and properties of Nd,YbGGG polycrysta DOI: 10.1007/s40145-012-0030-0
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