What absorbs at 2016 cm⁻¹ in an FTIR spectrum?
A band near 2016 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 2016 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 |
|---|---|---|---|
| N-O bond | 2 | 2 | 1.0 |
| Metal oxygen | 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 |
| C c single bond | 1 | 1 | 1.0 |
| Water (H2O) | 1 | 1 | 1.0 |
| C-S single bond | 1 | 1 | 1.0 |
| Alkyl C-H | 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 |
|---|---|---|---|
| TiO | 2016, 1730, 1699 | Methacrylate, Metal oxygen, Methoxy (OCH3) | 2 |
| TiO2 | 2016, 1700, 1093 | Metal oxygen, Methacrylate, Methoxy (OCH3) | 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 2016 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
-
Alkyl C-H confidence 1.0
“Chang cm-1, a peak associated with the C-H bond stretching (2016) reported a decrease in the yield of canola protein of the methyl groups (-CH3) was presented.”
Garcia-de la Rosa 等 - 2023 - Rheological and structural properties of complex c DOI: 10.24275/rmiq/Alim3003 -
C-S single bond confidence 1.0
“mate moiety, whether it is acting in monodentate or in biden1474.62 n(CDN) n(C-S) mode.[20,30] tate The stretching frequency possessed a positive shift The presence of only one strong band 2016 by moving to the higher wave, due to the mesom”
Separation of heavy metal from water samples-The study of the synthesis of complex compounds of heavy metal with dithiocarbamates DOI: 10.1080/10934529.2015.1109408 -
Metal oxygen confidence 1.0
“cm-1 Sn-O Vibrational analysis 2016).”
Structural and frequency-dependent dielectric properties of (SnO2)1-x(Fe2O3)x DOI: 10.1007/s11051-020-4763-3 -
Water (H2O) confidence 1.0
“Treatment with tall oils also reduced water absorption (Can and Sivrikaya 2016).”
Giridhar 等 - 2017 - DIMENSIONAL STABILIZATION OF WOOD BY CHEMICAL MODI DOI: 10.4067/S0718-221X2017005000002 -
Metal oxygen confidence 1.0
“Addition of PAA and TiO2 reveals an obvious change in peak Polymers2016,8, 179”
Liew 等 - 2016 - Poly(Acrylic acid)-Based Hybrid Inorganic-Organic DOI: 10.3390/polym8050179 -
C c single bond confidence 1.0
“C-C (Chyli´ n Hemicelluloses and 1080 nska et al., C-O and 1650 (Carpita et al., vibration pectin 2016) 2001) COO- (Chyli´ 1078 (Wilson et al., c Polygalacturonic acid 1608 nska et al., 2000) antisymmetric (pectin ester group) 2016)”
Unveiling the compositional remodelling of Arbutus unedo L. fruits during ripening DOI: 10.1016/j.scienta.2022.111248 -
N-O bond confidence 1.0
“No peak for the & Kim 2016).”
Qaderi 等 - 2021 - Preparation and Characterization of Copper, lion, DOI: 10.17576/jsm-2021-5001-14 -
N-O bond confidence 1.0
“Adsorption of NO x face acidities of the investigated catalysts were investigated on the fresh catalysts reveals vibrational features associated 2016.”
Say 等 - 2017 - Sulfur-tolerant BaOZrO2TiO2Al2O3 quaternary mix DOI: 10.1039/c6cy01898j
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