What absorbs at 1034 cm⁻¹ in an FTIR spectrum?
A band near 1034 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 1034 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 |
|---|---|---|---|
| Methoxy (OCH3) | 18 | 18 | 1.0 |
| Methacrylate | 18 | 18 | 1.0 |
| C-O single bond | 18 | 18 | 1.0 |
| Acetate | 18 | 18 | 1.0 |
| Silicon-oxygen (Si-O) | 7 | 7 | 1.0 |
| Phosphate (PO4) | 7 | 6 | 1.0 |
| Carbohydrate | 5 | 5 | 1.0 |
| Hydroxyl (O-H) | 4 | 4 | 1.0 |
| Silicon (Si) | 4 | 4 | 1.0 |
| Phosphorus | 4 | 3 | 1.0 |
| Siloxane (Si-O-Si) | 3 | 3 | 1.0 |
| Alkyl C-H | 3 | 3 | 1.0 |
| Lignin | 3 | 3 | 1.0 |
| C c single bond | 2 | 2 | 1.0 |
| Ester | 2 | 2 | 1.0 |
| Carbonyl (C=O) | 2 | 2 | 1.0 |
| S eq o | 2 | 2 | 1.0 |
| Carbonate | 2 | 1 | 1.0 |
| C-S single bond | 1 | 1 | 1.0 |
| N h | 1 | 1 | 1.0 |
| Ring structure | 1 | 1 | 1.0 |
| Aromatic ring | 1 | 1 | 1.0 |
| Carboxyl (COOH) | 1 | 1 | 1.0 |
| Protein | 1 | 1 | 1.0 |
| Quaternary ammonium | 1 | 1 | 1.0 |
| Oxygen heterocycle | 1 | 1 | 1.0 |
| Silicate | 1 | 1 | 1.0 |
| N-O bond | 1 | 0 | 1.0 |
| Secondary amine | 1 | 0 | 1.0 |
| C n single bond | 1 | 0 | 1.0 |
| Amide | 1 | 0 | 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 1034 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
-
Acetate confidence 1.0
“The slight peak C-O-Cskeletalvibrationofpolysaccharidesring 1034 cm(cid:2)1”
Structural characterization of Argania spinosa Moroccan wooden artifacts during natural degradation progress using infrared spectroscopy (ATR-FTIR) and X-Ray diffraction (XRD) DOI: 10.1016/j.heliyon.2019.e02477 -
Acetate confidence 1.0
“present in the peaks at 1034 (carbon-oxy- (32.6)A (0.9)A 2.5 159.6 4.9 cm-1 gen (C-O) stretching), at 1228 (carbon-hydrogen”
Acetylation of tropical hardwood species from forest plantations in Costa Rica: an FTIR spectroscopic analysis DOI: 10.1186/s10086-020-01898-9 -
Silicon (Si) confidence 1.0
“cm-1 appeared at 1509 A weak peak at 1034 showed asymmetric stretching of C-OC and Si-O stretching vibration, indicating the presence of silicates.”
Structural, Physical, and Mechanical Analysis of ZnO and TiO2 Nanoparticle-Reinforced Self-Adhesive Coating Restorative Material DOI: 10.3390/ma14247507 -
Acetate confidence 1.0
“1059 C-O stretching vibration in holocellulose 1034 1034 C-O stretching vibration 897”
Jin 等 - 2022 - Rapid Identification for the Pterocarpus Bracelet DOI: 10.3390/molecules27154793 -
Carbonyl (C=O) confidence 1.0
“cm-1 prominent peaks assigned to wavenumbers 1384 and 1034 Peaks at 1034 were more intense, and is region)35 assigned to carbonyl group (carbohydrate (Supplementary Table S3).”
Population authentication of the traditional medicinal plant Cassia tora L. based on ISSR markers and FTIR analysis DOI: 10.1038/s41598-018-29114-1 -
confidence 1.0
“cm-1,1034 cm-1 cm-1 at 1116 and 1005 are belonged to Si(Al)-O and Si-O-Si(Al) stretching vibration, and the band 250 P cm-1 at approximately 1034 is also assigned to C-O stretch-”
Experimental study on the influence of water immersion on spontaneous combustion of anthracite with high concentrations of sulfur-bearing minerals DOI: 10.1007/s10973-019-09073-z -
Acetate confidence 1.0
“and E) H5 at magnification of 1000 x the formation of hemiacetal (aldehyde) was proved by the absorption band of C-O-C (cyclic ether) at 1033.85 cm-1 [24].”
Preparation of In Situ Cross - Linked N - Maleoyl Chitosan - Oxidized Sodium Alginate Hydrogels for Drug Delivery Applications DOI: 10.3889/oamjms.2019.850 -
confidence 1.0
“As can be seen from the partial vibrational densities D cm-1 of states shown in Figure 2c, the vibration at 1034 represents the stretching of E 32cm-1 oxygen atoms in CO group.”
Understanding the Interfacial Interactions of Bioinspired Chitosan-Calcite Nanocomposites by First Principles Molecular Dynamics Simulations and Experimental FT-IR Spectroscopy DOI: 10.1016/j.carbpol.2019.115054
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