What absorbs at 1089 cm⁻¹ in an FTIR spectrum?
A band near 1089 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
Possible functional-group assignments
| Functional group | Supporting facts | Cited sources | Top confidence |
|---|---|---|---|
| Phosphate (PO4) | 3 | 3 | 0.9 |
| Silicon (Si) | 2 | 2 | 1.0 |
| Silicon-oxygen (Si-O) | 2 | 2 | 1.0 |
| C-O single bond | 2 | 2 | 1.0 |
| C n single bond | 1 | 1 | 0.9 |
| Sulfate (SO4) | 1 | 1 | 0.9 |
| Perchlorate | 1 | 1 | 0.9 |
| Thiocarbonyl | 1 | 1 | 0.8 |
| Siloxane (Si-O-Si) | 1 | 1 | 0.7 |
| Carboxyl (COOH) | 1 | 0 | 0.8 |
| Hydroxyl (O-H) | 1 | 0 | 0.8 |
Ranking reflects accumulated literature evidence, not a single authoritative rule. Always confirm against your sample context.
Literature behind these assignments
-
Silicon-oxygen (Si-O) confidence 1.0
“FTIR spectra showed peaks at 1089 and cm-1, 801 which corresponded to asymmetric and symmetric O-Si-O.”
Athinarayanan 等 - 2020 - Fabrication of Biogenic Silica Nanostructures from DOI: 10.1007/s12633-020-00379-4 -
C-O single bond confidence 1.0
“Explicitly assigned as PEG C-O-C peak.”
Deygen 和 Kudryashova - 2016 - New versatile approach for analysis of PEG content DOI: 10.1016/j.colsurfb.2016.01.030 -
confidence 0.9
“Text: 'peak at 1089 indicates strong methylene bond'.”
Baskar 等 - 2016 - Synthesis of Phytonanocomposite of Zinc Oxide by I DOI: 10.1007/s10904-016-0382-y -
Silicon (Si) confidence 0.9
“Explicit assignment in text.”
Hastuti 等 - 2020 - Synthesis of N '-(3-Trimethoxysilylpropyl)diethyle DOI: 10.1063/5.0008267 -
Perchlorate confidence 0.9
“Peak at 1089 cm-1 assigned to ClO4-.”
Ak 等 - 2008 - Synthesis, characterization and optoelectrochemica DOI: 10.1016/j.jelechem.2008.04.015 -
Phosphate (PO4) confidence 0.9
“Explicit assignment in text”
El-Din 等 - 2018 - Decontamination of radioactive cesium ions using o DOI: 10.1039/c8ra02707b -
C-O single bond confidence 0.9
“C-O peak noticed at 1089 cm-1.”
Lukman 和 Saidin - 2019 - Antibacterial Effect of Ginsengpolyaniline Encaps DOI: 10.1051/matecconf/201925303001 -
Sulfate (SO4) confidence 0.9
“sulfate”
Sandu 等 - 2023 - Authentication of a Stradivarius Petite Violin T DOI: 10.3390/app
Have a spectrum with this band?
Upload your FTIR spectrum and get a full interpretation report — peak assignments with literature citations, library matches, and a confidence-rated evidence chain — in seconds.
Interpret my spectrum