What absorbs at 1006 cm⁻¹ in an FTIR spectrum?
A band near 1006 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 1006 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 |
|---|---|---|---|
| Silicon (Si) | 4 | 4 | 1.0 |
| Silicon-oxygen (Si-O) | 3 | 3 | 1.0 |
| Alkyl C-H | 3 | 3 | 1.0 |
| C-O single bond | 3 | 0 | 1.0 |
| Siloxane (Si-O-Si) | 2 | 2 | 1.0 |
| S eq o | 2 | 1 | 1.0 |
| Methoxy (OCH3) | 2 | 0 | 1.0 |
| Methacrylate | 2 | 0 | 1.0 |
| Acetate | 2 | 0 | 1.0 |
| Carbonyl (C=O) | 2 | 0 | 1.0 |
| C c single bond | 1 | 1 | 1.0 |
| Secondary amine | 1 | 1 | 1.0 |
| C n single bond | 1 | 1 | 1.0 |
| Amide | 1 | 1 | 1.0 |
| Aromatic ring | 1 | 1 | 1.0 |
| Amino acid | 1 | 1 | 1.0 |
| Carboxyl (COOH) | 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 |
|---|---|---|---|
| chitosan | 1006, 1650, 1655 | Alkyl C-H, C-O single bond | 1 |
| NiO | 1006, 1450, 432 | Alkyl C-H, C-O single bond | 1 |
| graphene oxide | 1006, 1150, 3400 | C-O single bond, Alkyl C-H | 1 |
| chitin | 1006, 1650, 1655 | Alkyl C-H, C-O single bond | 1 |
| polypropylene | 1006, 1030, 1600 | Alkyl C-H, 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 1006 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
-
Amino acid confidence 1.0
“1006 is the phenylalanine peak, 1400 and 1200 are the”
Yadav 等 - 2021 - Evaluation of tire derived rubber (TDR) fixed biof DOI: 10.1080/09593330.2020.1737736 -
Alkyl C-H confidence 1.0
“Besides, the bands attributed to S = O (1006 and C-H stretching cm-1), 4-1 cm-1), of the benzene ring of DBSA (1030 HSO of H 2SO (1168 and C-N vibra4”
Synthesis, Characterization and Electrochemical Performance of a Redox-Responsive Polybenzopyrrole@Nickel Oxide Nanocomposite for Robust and Efficient Faraday Energy Storage DOI: 10.3390/nano12030513 -
Alkyl C-H confidence 1.0
“ATR-FTIR analysis of Pt surface after TOH treatment (Figure 3B) cm(cid:2)1 C-H showed bands at 1006, 892, 853, 809 and 743 (phenolic vi3.4.”
Detection of carvacrol in essential oils by electrochemical polymerization DOI: 10.1016/j.heliyon.2020.e03714 -
Silicon (Si) confidence 1.0
“clay and in modified clay were observed at 1114, 1030, and Rapid elemental analysis from fluorine (F) to uranium (U) 1006cm-1 wasdoneinXRF.Thesensitivitywasfrom<1ppmupto100% , respectively, due to Si-O stretching.”
Biswas 等 - 2017 - Facile Preparation of Biocomposite from Prawn Shel DOI: 10.1155/2017/6472131 -
Siloxane (Si-O-Si) confidence 1.0
“The Si-Oand Si-O-Si vibrations 1006cm-1 1683cm-1 1627cm-1 and in the kaolinite are detected at are illustrated by the bands at 1114, 1030, and”
Guessoum 等 - 2012 - Effects of Kaolin Surface Treatments on the Thermo DOI: 10.1155/2012/549154 -
C c single bond confidence 1.0
“The in-plane bending mode is located at 1006 cm-1 The peak located in IR spectrum at 854 is generated by the out-of-plane bendγ(C-C-H) ing mode of groups.”
Growth, crystal structure, Hirshfeld surface and vibrational properties of a new supramolecular hybrid material: (C4H7N2)2TeBr6 DOI: 10.1007/s00289-021-04053-6 -
Silicon (Si) confidence 1.0
“Both peaks from 1036 cm-1 and 1006 cm-1 in the GO-ZnO-APTS spectrum can be assigned to the Si-O-Si bond [31], while the one at 1378 cm-1 is ascribed to the O-H deformations of the C-OH groups [44].”
Synthesis and Characterization of Some Graphene Oxide Powders Used as Additives in Hydraulic Mortars DOI: 10.3390/app112311330 -
Silicon (Si) confidence 1.0
“cm-1, difference In the region 1006 cm-1, there was a difference in the peak intensity of the thermal-aged and the In the region 1006 there was a in the peak intensity of the thermal-aged and the water-aged samples, due to Si-O stretch vibr”
Shaik 和 Karuppaiyan - 2020 - Effect of Ageing on the Tracking Characteristics o DOI: 10.3390/ma13102242
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