What absorbs at 3061 cm⁻¹ in an FTIR spectrum?
A band near 3061 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 6 cited sources
Quick answer
A band near 3061 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 |
|---|---|---|---|
| Alkyl C-H | 4 | 2 | 1.0 |
| Aromatic ring | 2 | 1 | 1.0 |
| Amide | 1 | 1 | 1.0 |
| Water (H2O) | 1 | 1 | 1.0 |
| Hydroxyl (O-H) | 1 | 1 | 1.0 |
| N h | 1 | 1 | 1.0 |
| C-O single bond | 1 | 1 | 1.0 |
Ranking reflects accumulated literature evidence, not a single fixed rule. Always confirm against your sample context.
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 3061 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
-
C-O single bond confidence 1.0
“3300cm-1 peak at originates from the stretching vibration defects [48], while the excessively high temperature would 3061cm-1 2936cm-1 and of C-OH and N-H, the peaks at cause serious carbonization of prepared CDs and destroy 1650cm-1 fluoro”
Li 等 - 2019 - The One-Step Preparation of Green-Emissioned Carbo DOI: 10.1155/2019/8628354 -
Alkyl C-H confidence 1.0
“FTIR: -C-H for aromatic stretching, 3060.99 and 3029.58 f cm-1”
Manjare 等 - 2023 - Microwave-Assisted Rapid and Green Synthesis of Sc DOI: 10.1021/acsomega.2c05187 -
Hydroxyl (O-H) confidence 1.0
“LLM confirmed rule peak-group candidate”
Investigation of Crystallization and Salt Formation of Poorly Water-Soluble Telmisartan for Enhanced Solubility DOI: 10.3390/pharmaceutics11030102 -
Water (H2O) confidence 1.0
“cm-1, cm-1, peaks above 3000 near 3487, 3428, 3339, 3259 and 3061 assigned to stretching peaks above 3000 cm-1, near 3487, 3428, 3339, 3259 and 3061 cm-1, assigned to stretching vibrations of the coordinated water molecules [30].”
Calcium Oxalate and Gallic Acid: Structural Characterization and Process Optimization toward Obtaining High Contents of Calcium Oxalate Monohydrate and Dihydrate DOI: 10.3390/cryst11080954 -
Amide confidence 1.0
“Wavelength/cm-1 Definition of the spectral assignment 3303 Amide A (mainly N-H stretching) 3061 Amide B (N-H bending)”
Ye 等 - 2016 - The impact of the HbA1c level of type 2 diabetics DOI: 10.1038/srep33352 -
Alkyl C-H confidence 0.9
“Explicit assignment in text”
Nanoemulsion and nanogel containing Artemisia dracunculus essential oil; larvicidal effect and antibacterial activity DOI: 10.1186/s13104-022-06135-8
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