What absorbs at 794 cm⁻¹ in an FTIR spectrum?
A band near 794 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 6 cited sources
Possible functional-group assignments
| Functional group | Supporting facts | Cited sources | Top confidence |
|---|---|---|---|
| Silicon-oxygen (Si-O) | 2 | 1 | 0.9 |
| Silicon carbon | 1 | 1 | 0.9 |
| Siloxane (Si-O-Si) | 1 | 1 | 0.9 |
| N-O bond | 1 | 1 | 0.8 |
Ranking reflects accumulated literature evidence, not a single authoritative rule. Always confirm against your sample context.
Literature behind these assignments
-
confidence 0.9
“Explicit mention: surface phonon peak at 794 cm-1.”
Patoka 等 - 2016 - Nanoscale plasmonic phenomena in CVD-grown MoS2 mo DOI: 10.1364/OE.24.001154 -
Siloxane (Si-O-Si) confidence 0.9
“Explicit assignment: 'peak at 794 corresponds to Si-O-Si symmetric vibration'”
Hernandez-Leon 等 - 2017 - Novel Synthesis of Core-Shell Silica Nanoparticles DOI: 10.3390/molecules22101712 -
Silicon-oxygen (Si-O) confidence 0.9
“Peak at 794 attributed to Si-O-T.”
Istuque 等 - 2019 - Effect of sewage sludge ash on mechanical and micr DOI: 10.1016/j.conbuildmat.2019.01.093 -
Silicon carbon confidence 0.9
“Band at 794 cm-1 related to Si-C vibrations.”
Oliveira 等 - 2016 - Dispersion polymerization of methyl methacrylate i DOI: 10.1016/j.cep.2015.10.022 -
confidence 0.8
“Attributed to s-torsion in Raman spectrum.”
Arjunan 等 - 2012 - Quantum chemical studies and vibrational analysis DOI: 10.1016/j.saa.2012.08.053 -
N-O bond confidence 0.8
“Assigned to NO bending.”
Mahieu 等 - 2021 - First retrievals of peroxyacetyl nitrate (PAN) fro DOI: 10.1525/elementa.2021.00027
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