What absorbs at 1022 cm⁻¹ in an FTIR spectrum?
A band near 1022 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 1022 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 | 17 | 16 | 1.0 |
| Methoxy (OCH3) | 12 | 12 | 1.0 |
| Methacrylate | 12 | 12 | 1.0 |
| Acetate | 12 | 12 | 1.0 |
| Hydroxyl (O-H) | 11 | 10 | 1.0 |
| Carbohydrate | 9 | 9 | 1.0 |
| Alkyl C-H | 5 | 5 | 1.0 |
| Amide | 4 | 4 | 1.0 |
| Phosphate (PO4) | 4 | 3 | 1.0 |
| C c single bond | 4 | 3 | 1.0 |
| Carboxyl (COOH) | 3 | 3 | 1.0 |
| Aromatic ring | 3 | 3 | 1.0 |
| S eq o | 3 | 2 | 1.0 |
| Methyl | 2 | 2 | 1.0 |
| Secondary amine | 2 | 2 | 1.0 |
| Ring structure | 2 | 2 | 1.0 |
| Metal oxygen | 2 | 1 | 1.0 |
| Alkene (C=C) | 1 | 1 | 1.0 |
| Ketone | 1 | 1 | 1.0 |
| Ester | 1 | 1 | 1.0 |
| Carbonyl (C=O) | 1 | 1 | 1.0 |
| Thiol | 1 | 1 | 1.0 |
| C-S single bond | 1 | 1 | 1.0 |
| Silicon (Si) | 1 | 1 | 1.0 |
| Thiocarbonyl | 1 | 1 | 1.0 |
| Chitosan | 1 | 1 | 1.0 |
| Sulfonate | 1 | 1 | 1.0 |
| Water (H2O) | 1 | 1 | 1.0 |
| Amino acid | 1 | 1 | 1.0 |
| N h | 1 | 1 | 1.0 |
| C n single bond | 1 | 1 | 1.0 |
| N n bond | 1 | 1 | 0.9 |
| N-O bond | 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 |
|---|---|---|---|
| starch | 1022, 1650, 1540 | Methacrylate, Acetate, C-O single bond | 2 |
| Silica | 1022, 1100, 1080 | Methacrylate, Acetate | 1 |
| graphene | 1022, 1720, 2097 | Methacrylate, Acetate, C-O single bond | 1 |
| silver nanoparticles | 1022, 1636, 1631 | 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 1022 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-H bending was observed at 1047 Foods2022,11,2430 14of19 and 1022 cm-1, which corresponded to the crystalline and amorphous structures of starch, respectively [22].”
Formation of Intermediate Amylose Rice Starch–Lipid Complex Assisted by Ultrasonication DOI: 10.3390/foods11162430 -
Acetate confidence 1.0
“Vol.30, No.1(2013)018103 1022cm-1 to the C-O-H bending mode.”
Characterization of Modified Tapioca Starch in Atmospheric Argon Plasma under Diverse Humidity by FTIR Spectroscopy DOI: 10.1088/0256-307X/30/1/018103 -
Amide confidence 1.0
“The band at 1022.27 can be assigned to medium C-N stretching vibrations of amines signifying the presence of amino acid.”
Characterization, Antimicrobial and Antioxidant Evaluation of Biofabricated Silver Nanoparticles from Endophytic Pantoea anthophila DOI: 10.1007/s10904-021-01974-7 -
Carbohydrate confidence 1.0
“The IR cm(cid:1)1 absorbance band at 1047 was susceptible to ordered or crystalline structure cm(cid:1)1 and the band at 1022 was related to amorphous structure in starch, and at cm(cid:1)1 which was responsive to water [37].”
Interactions between polyols and wheat biopolymers in a bread model system fortified with inulin: A Fourier transform infrared study DOI: 10.1016/j.heliyon.2018. -
Carbohydrate confidence 1.0
“The pair of bands resolved near 1022 and cm-1 cm-1 1048 corresponds to the 1017 mode observed in phthaloyl starch.”
Ternary Natural Deep Eutectic Solvent (NADES) Infused Phthaloyl Starch as Cost Efficient Quasi-Solid Gel Polymer Electrolyte DOI: 10.1016/j.carbpol.2017.03.023 -
Water (H2O) confidence 1.0
“In many studies, infrared spectroscopy has been used to determine the amount of ordered or crystalline domains by evaluFor casting starch films containing iodine (iodine:potassium atingtheabsorbanceintensitiesat1047and1022cm-1.Thesignal iod”
Singh 等 - 2009 - The effects of iodine on kidney bean starch Films DOI: 10.1016/j.ijbiomac.2009.04.006 -
Acetate confidence 1.0
“C-O-C glycoside 1103 glycoside ether mainly hemicellulose Dokken and Davis (2007) C-C, C-O C-OH stretching 1022, 1047, Stretching vibration of of alcohic groups and carboxylic Sene et al.”
Toan 等 - 2017 - Salicylic acid-induced accumulation of biochemical DOI: 10.1080/17429145.2017.1291859 -
Ring structure confidence 1.0
“cm-1 the silicon-oxy compounds The last band peaks was located at 1022, 827, and 752 for methylene (> CH 2) as saturated aliphatic in form of cyclohexane ring vibrations and the last two from an aromatic ring, (aryl)58.”
Silica and graphene mediate arsenic detection in mature rice grain by a newly patterned current–volt aptasensor DOI: 10.1038/s41598-021-94145-0
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