What absorbs at 1055 cm⁻¹ in an FTIR spectrum?
A band near 1055 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 1055 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 |
|---|---|---|---|
| C-O single bond | 14 | 13 | 1.0 |
| Methoxy (OCH3) | 12 | 12 | 1.0 |
| Methacrylate | 12 | 12 | 1.0 |
| Acetate | 12 | 12 | 1.0 |
| Hydroxyl (O-H) | 6 | 5 | 1.0 |
| Secondary amine | 2 | 2 | 1.0 |
| C n single bond | 2 | 2 | 1.0 |
| Amide | 2 | 2 | 1.0 |
| Silicon (Si) | 2 | 2 | 1.0 |
| Siloxane (Si-O-Si) | 2 | 2 | 1.0 |
| Silicon-oxygen (Si-O) | 2 | 2 | 1.0 |
| Alkyl C-H | 2 | 2 | 1.0 |
| Hydrogen bond | 1 | 1 | 1.0 |
| Carboxyl (COOH) | 1 | 1 | 1.0 |
| C c single bond | 1 | 1 | 1.0 |
| Sulfonate | 1 | 1 | 1.0 |
| Borate | 1 | 1 | 1.0 |
| Boron nitrogen | 1 | 0 | 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 |
|---|---|---|---|
| graphene | 1055, 1720, 2097 | Methacrylate, Acetate, C-O single bond | 1 |
| nanocomposite | 1055, 2921, 3300 | Methacrylate, Acetate, C-O single bond | 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 1055 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 C=O, C-O and C-O-C and the appearance of peaks at 1055 and 554 peaks for oxygenated groups in the mixtures where more intense and at slightly lower D wavelengths than for MNP-PCP indicating little or no interaction between the two mater”
Enhanced arsenic (iii) adsorption from aqueous solution by magnetic pine cone biomass DOI: 10.1016/j.matchemphys.2018.09.067 -
Acetate confidence 1.0
“AFT10 and AFT20, and the peak shifted to 1055 This peak is believed to be due to HCOOcm-1 C-O from the of the AFT salt.”
Proton-Conducting Biopolymer Electrolytes Based on Carboxymethyl Cellulose Doped with Ammonium Formate DOI: 10.3390/polym14153019 -
Borate confidence 1.0
“The B-O stretchthe (Y 0.053+compounds.Thisisconsistent 1055cm-1 inthe(Y x,Gd 0.95-x)BO 3:Eu ing vibration bands at 866 and correspond to the with the FTIR spectra analyses.”
Zhang 等 - 2008 - Infrared spectra and luminescence properties of (Y DOI: 10.1016/j.jallcom.2007.01.010 -
Acetate confidence 1.0
“The peaks in the range of 1407 would indicate the vibration of COO-, either in symmetric or asymmetric bond groups [25], while the presence cm-1 of 1055 would indicate the stretching vibration of C-O [26,27].”
Effect of Graphene Concentration on the Electrochemical Properties of Cobalt Ferrite Nanocomposite Materials DOI: 10.3390/nano11102523 -
Sulfonate confidence 1.0
“at 1055 cm-1 observed in the IR spectra is characteristic for the stretching vibrations of SO3 13C The synthesized SPNBIs were examined by solid-state NMR spectroscopy groups in sulfonic acids.”
One-Step Synthesis of Functional Sulfonated Polynaphthoylenebenzimidazoles for Biosensing Applications DOI: 10.3390/app13021073 -
Alkyl C-H confidence 1.0
“These observations indicate Moreover, the bands at 1455, 1363, 1298, and 1055 cm-1 relate to -CH scissoring, -OH 2 that some hemicellulose and lignin remained in the extracted cellulose from the water”
Fabrication and Evaluation of Water Hyacinth Cellulose-Composited Hydrogel Containing Quercetin for Topical Antibacterial Applications DOI: 10.3390/gels8120767 -
Hydroxyl (O-H) confidence 1.0
“The study in the previous chapter assigns the of the volatiles, while the 2D correction spectra further explain the cm21 cm21 band to esters and the 1055 to alcohols, but the 2D 1245 changesforsomeweakpeaks.ThePCAanalysisindicatesthattheIR”
Dong 等 - 2013 - Analyzing Strawberry Spoilage via its Volatile Com DOI: 10.1038/srep02585 -
Acetate confidence 1.0
“1222.20 1317.80 1250-1020 C-N stretch Amine 1228.55 1222.20 1317.80 1085-1050 C-O stretch Primary alcohol 1054.80 1051.10 1034.80 1085-1050 C-O stretch Primary alcohol 1054.80 1051.10 1034.80”
The Authentication and Grading of Edible Bird’s Nest by Metabolite, Nutritional, and Mineral Profiling DOI: 10.3390/foods10071574
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