What absorbs at 964 cm⁻¹ in an FTIR spectrum?
A band near 964 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 4 cited sources
Possible functional-group assignments
| Functional group | Supporting facts | Cited sources | Top confidence |
|---|---|---|---|
| Phosphate (PO4) | 3 | 2 | 0.9 |
| Silicon nitrogen | 1 | 1 | 1.0 |
| Silanol (Si-OH) | 1 | 0 | 0.9 |
Ranking reflects accumulated literature evidence, not a single authoritative rule. Always confirm against your sample context.
Literature behind these assignments
-
Silicon nitrogen confidence 1.0
“Attributed to Si-N stretching due to silicon nitride.”
Ouadah 等 - 2022 - Optical and photoelectrochemical properties of nit DOI: 10.1080/2374068X.2021.1890420 -
confidence 0.9
“Explicit assignment: 'bands at 964 (2) deformation vibration of C-H for ester compounds'”
Worzakowska - 2014 - Pyrolysis of cyclo-aromatic diesters DOI: 10.1007/s10973-014-4021-y -
Phosphate (PO4) confidence 0.8
“Weak phosphate ν1 band”
Bramowicz 等 - 2016 - Mechanical properties and fractal analysis of the DOI: 10.1016/j.apsusc.2016.04.077 -
Phosphate (PO4) confidence 0.7
“Maximum of absorption at 964 cm-1, likely P-O related.”
Sobczak 等 - 2009 - Evaluation of the biomedical properties of hydroxy DOI: 10.2478/v10026-009-0010-5
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