What absorbs at 1064 cm⁻¹ in an FTIR spectrum?
A band near 1064 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 1064 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 |
|---|---|---|---|
| Methacrylate | 20 | 18 | 1.0 |
| Acetate | 20 | 18 | 1.0 |
| Methoxy (OCH3) | 19 | 17 | 1.0 |
| C-O single bond | 19 | 17 | 1.0 |
| Carbohydrate | 7 | 6 | 1.0 |
| Amide | 5 | 5 | 1.0 |
| Hydroxyl (O-H) | 5 | 4 | 1.0 |
| Ester | 4 | 3 | 1.0 |
| Silicon-oxygen (Si-O) | 3 | 3 | 1.0 |
| Carboxyl (COOH) | 2 | 2 | 1.0 |
| Alkene (C=C) | 2 | 2 | 1.0 |
| Alkyl C-H | 2 | 2 | 1.0 |
| Secondary amine | 2 | 2 | 1.0 |
| C n single bond | 2 | 2 | 1.0 |
| Chitosan | 1 | 1 | 1.0 |
| Fluorine (C-F) | 1 | 1 | 1.0 |
| Ketone | 1 | 1 | 1.0 |
| Carbonyl (C=O) | 1 | 1 | 1.0 |
| Ring structure | 1 | 1 | 1.0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1.0 |
| Silicon carbon | 1 | 1 | 1.0 |
| Silicon (Si) | 1 | 1 | 1.0 |
| Phospholipid | 1 | 1 | 1.0 |
| Thiocarbonyl | 1 | 1 | 1.0 |
| C c single bond | 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 |
|---|---|---|---|
| polystyrene | 1064, 1020, 1600 | Methacrylate, Acetate, Methoxy (OCH3) | 1 |
| TiO2 | 1064, 1700, 1093 | Methacrylate, Acetate, C-O single bond | 1 |
| PMMA | 1064, 1722, 1383 | Methacrylate, Acetate, 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 1064 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
“Other characteristic cm-1, band found at 1064 which is belong to the symmetric and asymmetric stretching cm-1 of C-O groups, and those at 1249-1251 are belong to epoxy whole ring.”
Robust Interface on ENR-50/TiO2 Nanohybrid Material Based Sol-Gel Technique: Insights into Synthesis, Characterization and Applications in Optical DOI: 10.1016/j.arabjc.2020.06.013 -
C c single bond confidence 1.0
“The other peaks include 1064 (C-C skeletal vibration), 874 cm-1 198 (vinylidene group), 853 (-CH 2rocking), 761 (-CF 3stretching) and 694 (-CH 2bending) all”
Effect of polyaniline (PANI) on Poly(vinylidene fluoride-co-hexaflouro propylene) (PVDF-co-HFP) polymer electrolyte membrane prepared by breath figure method DOI: 10.1016/j.polymertesting.2017.03.012 -
Acetate confidence 1.0
“Phospholipid w w w w vw 1098sh -C-O Stretching Phospholipid w w w w m 1064”
Gao 等 - 2017 - Technical note Characterization of lipid constitu DOI: 10.2527/jas2016.1332 -
Alkene (C=C) confidence 1.0
“The peak of 1064.25 cm-1 and 796.10 cm-1 attributed to C=C stretching of hemicellulose and C=C stretching of vinylidene alkenes, respectively.”
Preparation and Characterization of Sound-Absorbent Based on Polystyrene Reinforced Primary Sludge and Fly Ash from Pulp Mill DOI: 10.14716/ijtech.v14i3.5131 -
Amide confidence 1.0
“Statistically significant correlations were not observed between the OARSI grade and the amide I region, the carbohydrate region, the carbohydrate region normalized with the amide I region or the cm-1 second derivative peak 1064 (PG) in eit”
Imaging of Osteoarthritic Human Articular Cartilage using Fourier Transform Infrared Microspectroscopy Combined with Multivariate and Univariate Analysis DOI: 10.1038/srep30008 -
Hydroxyl (O-H) confidence 1.0
“Whereas, the band appeared at 1064 is characteristic for bending vibration of OH group.”
CMC stabilized nano silver synthesis, characterization and its antibacterial and synergistic effect with broad spectrum antibiotics DOI: 10.1016/j.carbpol.2016.11.083 -
Acetate confidence 1.0
“1064 cm-1 C-O, Zn2+: Al3+ 254 ratio on this peak is still unknown.”
Dependence of bonding interactions in Layered Double Hydroxides on metal cation chemistry DOI: 10.1016/j.molstruc.2016.06.045 -
Acetate confidence 1.0
“Figure 8(b) shows that the peaks observed at 1064 maycorrespondto-C-O-C-,whilepeaksobservedbetween1181.33cm(cid:6)1 binding density that characterizes the number of non-electronic-sharing cm(cid:6)1 C-O interactions between atoms such as io”
Optical characterizations of PMMA/metal oxide nanoparticles thin films: bandgap engineering using a novel derived model DOI: 10.1016/j.heliyon.2021.e05952
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