What absorbs at 1030 cm⁻¹ in an FTIR spectrum?
A band near 1030 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 1030 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 | 75 | 65 | 1.0 |
| Methacrylate | 67 | 60 | 1.0 |
| Acetate | 67 | 60 | 1.0 |
| Methoxy (OCH3) | 65 | 58 | 1.0 |
| Silicon-oxygen (Si-O) | 24 | 22 | 1.0 |
| Carbohydrate | 22 | 19 | 1.0 |
| Alkyl C-H | 19 | 17 | 1.0 |
| Hydroxyl (O-H) | 16 | 16 | 1.0 |
| Siloxane (Si-O-Si) | 14 | 14 | 1.0 |
| S eq o | 14 | 14 | 1.0 |
| Silicon (Si) | 13 | 12 | 1.0 |
| Phosphate (PO4) | 13 | 10 | 1.0 |
| Amide | 12 | 12 | 1.0 |
| Carboxyl (COOH) | 12 | 12 | 1.0 |
| Carbonyl (C=O) | 9 | 8 | 1.0 |
| Ester | 8 | 8 | 1.0 |
| C c single bond | 8 | 7 | 1.0 |
| Secondary amine | 6 | 6 | 1.0 |
| Ketone | 5 | 5 | 1.0 |
| C n single bond | 5 | 5 | 1.0 |
| Phosphorus | 5 | 4 | 1.0 |
| Lignin | 4 | 4 | 1.0 |
| Ring structure | 4 | 4 | 1.0 |
| Aromatic ring | 3 | 3 | 1.0 |
| Nucleic acid | 3 | 2 | 1.0 |
| Alkene (C=C) | 3 | 2 | 1.0 |
| N h | 3 | 2 | 1.0 |
| C-S single bond | 2 | 2 | 1.0 |
| Water (H2O) | 2 | 2 | 1.0 |
| Carbonate | 2 | 2 | 1.0 |
| N n bond | 2 | 1 | 1.0 |
| Silicon silicon | 1 | 1 | 1.0 |
| Lipid | 1 | 1 | 1.0 |
| Metal oxygen | 1 | 1 | 1.0 |
| C=n | 1 | 1 | 1.0 |
| Amino acid | 1 | 1 | 1.0 |
| Silicate | 1 | 1 | 1.0 |
| Sulfonyl | 1 | 1 | 1.0 |
| Oxygen heterocycle | 1 | 1 | 1.0 |
| Methyl | 1 | 1 | 1.0 |
| Silicon fluorine | 1 | 1 | 1.0 |
| Acetyl | 1 | 1 | 1.0 |
| Protein | 1 | 1 | 1.0 |
| Anhydride | 1 | 0 | 0.9 |
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 |
|---|---|---|---|
| hydroxyapatite | 1030, 1620, 1639 | Methacrylate, Acetate | 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 1030 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
“2 cm-1: jugated ketone (phenyl-carbonyl) in lignin, 1160 C-O-C asymmetrical stretching in cellulose and hemicm-1: cm-1: celluloses, 1030 C-O, C=C, and C-C-O stretching in wood, and 890 glycosidic linkage.”
Physicochemical characterisation of barley straw treated with sodium hydroxide or urea and its digestibility and in vitro fermentability in ruminants DOI: 10.1038/s41598-022-24738-w -
Acetate confidence 1.0
“The peak at 1030 can be attributed to oligosaccharides, glycoprotein, and cellucm-1 lose (C-O stretch) stretch.”
Classification and identification of Rhodobryum roseum Limpr. and its adulterants based on fourier-transform infrared spectroscopy (FTIR) and chemometrics DOI: 10.1371/journal.pone.0172359 -
Protein confidence 1.0
“ordered apatite, but a peak at 1030 is indicative of the The collagen in the cornea plays an important role in stoichiometrically ordered apatite [7].”
Chen 等 - 2006 - Corneal calcification chemical composition of cal DOI: 10.1007/s00417-005-1191-0 -
Carbonate confidence 1.0
“A band 3vibration 873cm-1 1030cm-1 43- (cid:2) due to carbonate was seen.”
Chiou 等 - 2011 - FT-IR microscopic imaging of calcified deposit of DOI: 10.1016/j.vibspec.2011.06.004 -
Ring structure confidence 1.0
“in-plane ring stretch C-O 1029.81 1029.81 1031.87 1029.81 1030 stretch”
Dave 等 - 2014 - The removal of impurities from gray cotton fabric DOI: 10.1080/00405000.2013.827900 -
Acetate confidence 1.0
“The band at 1518 is generally ascribed to cm-1 C-H bending vibration and the band at 1030 assigned to C-O stretching of acetyl groups present in PVA.”
Devi 等 - 2019 - Structural and optical studies on PVA capped SnS f DOI: 10.1088/1674-4926/40/5/052101 -
Acetate confidence 1.0
“cm(cid:2)1, The bands assigned at 1030 and 1125-1128 correspond to C-O(H) and C-O(C) stretching of first-order aliphatic OH and ether groups.”
Synthesis and characterization of lignin–melamine–formaldehyde resin DOI: 10.1177/0892705716632856 -
Carbohydrate confidence 1.0
“It was found that the ratio of peak areas at 1030 and 1080 corresponding BaF 2 to the glycogen and phosphate vibrations respectively, suggests a potential method for the differentiation of benign from malignant cells.”
Applications of Fourier transform infrared microspectroscopy in studies of benign prostate and prostate cancer. A pilot study DOI: 10.1002/path.1421
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