What absorbs at 1036 cm⁻¹ in an FTIR spectrum?
A band near 1036 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 1036 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-oxygen (Si-O) | 12 | 12 | 1.0 |
| C-O single bond | 11 | 11 | 1.0 |
| Methoxy (OCH3) | 10 | 10 | 1.0 |
| Methacrylate | 10 | 10 | 1.0 |
| Acetate | 10 | 10 | 1.0 |
| Silicon (Si) | 5 | 5 | 1.0 |
| Siloxane (Si-O-Si) | 4 | 4 | 1.0 |
| Carbohydrate | 4 | 4 | 1.0 |
| S eq o | 3 | 3 | 1.0 |
| C c single bond | 3 | 3 | 1.0 |
| Carboxyl (COOH) | 3 | 3 | 1.0 |
| Amide | 2 | 2 | 1.0 |
| Phosphate (PO4) | 2 | 2 | 1.0 |
| Alkyl C-H | 2 | 2 | 1.0 |
| Sulfonate | 2 | 2 | 1.0 |
| Ring structure | 2 | 2 | 1.0 |
| Hydroxyl (O-H) | 2 | 1 | 1.0 |
| Secondary amine | 1 | 1 | 1.0 |
| C n single bond | 1 | 1 | 1.0 |
| N h | 1 | 1 | 1.0 |
| Hydrogen bond | 1 | 1 | 1.0 |
| Nitro (NO2) | 1 | 1 | 1.0 |
| Metal oxygen | 1 | 1 | 1.0 |
| Silanol (Si-OH) | 1 | 1 | 0.9 |
| Oxygen heterocycle | 1 | 1 | 0.7 |
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 1036 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
-
Metal oxygen confidence 1.0
“The compressive strength of these samples was ated by the mass proportion of Na Available online 10 November 2009 1400cm(cid:2)1 have been attributed to asymmetric stretching of Al-O/Si-O the main peaks at 1036 and”
Compressive strength and microstructural characteristics of class C fly ash geopolymer DOI: 10.1016/j.cemconcomp.2009.11.003 -
confidence 1.0
“The FT-IR spectrum as recorded in transmittance mode clearly showed characteristic peaks of diatom cm-1, biosilica, including for Si-O-Si stretching vibration at 1036.01 and 786.64 and O-H stretching of bound water cm-1, surface hydroxyl gr”
Mazumder 等 - 2014 - Structural and optical characterization of fresh w DOI: 10.1117/12.2039793 -
Alkyl C-H confidence 1.0
“ECS Journal of Solid State Science and Technology, 6 (7) R88-R95 (2017) R91 cm-1 cm-1 The absorption band at 3450 and 1630 can be attributed bond.51 to the symmetric stretching and bending vibration of H-O-H Theabsorptionbandobtainedat1386c”
Mondal 和 Manam - 2017 - Structural and Luminescent Properties of Si4+ Co-D DOI: 10.1149/2.0021708jss -
Carboxyl (COOH) confidence 1.0
“were present in both FTIR spectra of plant extract and FeNPs, such as alkyl halides, alkynes, aromatics and aliphatic amines, esters, ethers, alcohol, carboxylic acids, and nitro Nanomaterials2022,12,2404 11of25 compounds with peaks at 526.”
Green Synthesis and Characterization of Iron Nanoparticles Synthesized from Aqueous Leaf Extract of Vitex leucoxylon and Its Biomedical Applications DOI: 10.3390/nano12142404 -
Acetate confidence 1.0
“It peaks at 1036 which is Preparation of PPG-Graft-St: Graft attributed to stretch vibrations of C - O - C and copolymerization was carried out in a 250 mL threeconfirm the point of grafting St unto PPG.”
Negim 等 - 2021 - Synthesis and characterization of polypropylene gl DOI: 10.31643/2021/6445.23 -
Silicon (Si) confidence 1.0
“The cm-1 cm-1 peaks at 1036.41 and 1007.92 are ascribed to the Si-O deformation bands which are closer to that reported cm-1.”
Preparation and characterization of adsorbents derived from bentonite and kaolin clays DOI: 10.1007/s13201-018-0827-2 -
Carboxyl (COOH) confidence 1.0
“Capping of =O' ion is reduced to by mainly '-OH' and ' cm-1 the nanoparticle comes from the absorption band at 1036 functional groups of saponins, anthraquinones and flavoC-O from stretch of alcohols, carboxylic acids, esters, ethers noids”
Enhancement of antibacterial activity through phyto‐fabrication of silver nanoparticles with Ficus thonningii aqueous extracts DOI: 10.1049/nbt2.12093 -
confidence 1.0
“cm-1 are due to the C-Cl observed between 600 and 700 trum of the GO coated with APTES (fGO) gives charactercm-1 cm-1 stretching vibrations, the band at 1435 is assigned to istic absorption peaks at 1036 for Si-O-C bond and cm-1 cm-1 the CH”
Dynamic mechanical and optical characterization of PVC/fGO polymer nanocomposites DOI: 10.1007/s00339-018-2026-2
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