What absorbs at 1057 cm⁻¹ in an FTIR spectrum?
A band near 1057 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 1057 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 | 12 | 12 | 1.0 |
| Methacrylate | 10 | 10 | 1.0 |
| Acetate | 10 | 10 | 1.0 |
| Methoxy (OCH3) | 9 | 9 | 1.0 |
| Carbohydrate | 3 | 3 | 1.0 |
| Ester | 3 | 3 | 1.0 |
| Aromatic ring | 2 | 2 | 1.0 |
| Amide | 2 | 2 | 1.0 |
| Alkyl C-H | 2 | 2 | 1.0 |
| Silicon-oxygen (Si-O) | 2 | 2 | 1.0 |
| Nucleic acid | 1 | 1 | 1.0 |
| Phosphate (PO4) | 1 | 1 | 1.0 |
| Ring structure | 1 | 1 | 1.0 |
| Alkene (C=C) | 1 | 1 | 1.0 |
| Oxygen heterocycle | 1 | 1 | 1.0 |
| Urea | 1 | 1 | 1.0 |
| Secondary amine | 1 | 1 | 1.0 |
| C n single bond | 1 | 1 | 1.0 |
| N h | 1 | 1 | 1.0 |
| Silicon (Si) | 1 | 1 | 1.0 |
| Fluorine (C-F) | 1 | 1 | 1.0 |
| Ketone | 1 | 1 | 1.0 |
| Carboxyl (COOH) | 1 | 1 | 1.0 |
| Carbonyl (C=O) | 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 1057 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
“Table 3, According to the IR data in W-DHS has characteristic peaks at 1513, 1377, 1194 and cm-1 corresponding to the characteristic peaks of TC-DHS at 1727 (C=O vibration), 1454, 1057 cm-1.”
Discrimination and similarity evaluation of tissue-cultured and wild Dendrobium species using Fourier Transform Infrared Spectroscopy DOI: 10.1016/j.molstruc.2015.01.027 -
confidence 1.0
“Another typical absorption cm-1 band of TA at 1057 is due to the stretching vibration of C-F.”
Chitosan-Coated PLGA Nanoparticles Encapsulating Triamcinolone Acetonide as a Potential Candidate for Sustained Ocular Drug Delivery DOI: 10.3390/pharmaceutics13101590 -
confidence 1.0
“N(cid:99)-(3-trimethoxysilylpropyl)diethylentriamine The synthesis of modified silica (SiO 2(RHA)-TMPDT) was cm-1 2(RHA)-TMPDT showed peaks at 1057, 1471 and 2908 confirming successfully carried out.”
Synthesis of N’-(3-trimethoxysilylpropyl)diethylentriamine modified silica (SiO2(RHA)-TMPDT) for adsorption of gold(III) DOI: 10.1063/5.0008267 -
confidence 1.0
“1631.7 Variable angle vibration of N H CONH 1057.3 Stretching vibration of C O C and C O H Pyran ring 1037.13”
Characterization of Auricularia auricula polysaccharides and its antioxidant properties in fresh and pickled product DOI: 10.1016/j.ijbiomac.2015.08.020 -
Alkyl C-H confidence 1.0
“Peaks at 1082 and vibration modes of peaks at 2958, 2931 and 2872 11 cm-1 1165 are unique to the blood spectra, whereas the are corresponding to asymmetric vibration of C-H in AnalyticalMethodsAcceptedManuscript 12 cm-1 peak at 1057 is obse”
Zou 等 - 2016 - Whole blood and semen identification using mid-inf DOI: 10.1039/C5AY03337C. -
Acetate confidence 1.0
“1277 Strong C-O stretching Aromatic ester 1057 Strong”
Evaluation of anticandidal activities and phytochemical examination of extracts prepared from DOI: 10.1186/s12906-022-03552-x -
confidence 1.0
“As a final remark, sepiolite typical vibrations (MgOH (3700-3555 cm-1), Si-O (1057 and 1000 cm-1), SiOH (976 cm-1) and MgOH (689 cm-1) [6], as shown in the spectrum in Figure S7 of the Supplementary Material) could not be identified in the”
Bugnotti 等 - 2023 - Structure of Starch-Sepiolite Bio-Nanocomposites DOI: 10.3390/polym15051207 -
Acetate confidence 1.0
“cm-1, The peaks related to C-H stretching vibration at 2901 O-H stretching vibration cm-1, at 3447 C-O stretching vibration from asymmetric oxygen bridge between 1057 cm-1, and 1113 C-O carbonyl stretching vibration from the glucose of the”
Impedance, Electrical Equivalent Circuit (EEC) Modeling, Structural (FTIR and XRD), Dielectric, and Electric Modulus Study of MC-Based Ion-Conducting Solid Polymer Electrolytes DOI: 10.3390/ma15010170
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