What absorbs at 463 cm⁻¹ in an FTIR spectrum?
A band near 463 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 463 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) | 6 | 6 | 1.0 |
| Silicon (Si) | 5 | 5 | 1.0 |
| Metal oxygen | 5 | 5 | 1.0 |
| Siloxane (Si-O-Si) | 2 | 2 | 1.0 |
| Alkyl C-H | 2 | 0 | 1.0 |
| Borate | 1 | 1 | 1.0 |
| Ring structure | 1 | 1 | 1.0 |
| Silicate | 1 | 1 | 1.0 |
| Phosphate (PO4) | 1 | 1 | 1.0 |
| Carbonate | 1 | 1 | 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 |
|---|---|---|---|
| TiO2 | 463, 1700, 1093 | Metal oxygen | 1 |
| NaOH | 463, 3429, 897 | Silicon-oxygen (Si-O) | 1 |
| goethite | 463, 1470, 696 | Metal oxygen, Silicon-oxygen (Si-O) | 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 463 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
-
Silicon (Si) confidence 1.0
“The FTIR measurements indicated the existence of peaks at 463, 604, 795 and a 1111cm(cid:2)1 and this can be attributed to Si-O-Si and Si-O stretching vibrations.”
Preparation of highly aligned silicon oxide nanowires with stable intensive photoluminescence DOI: 10.1016/j.physb.2009.11.031 -
Carbonate confidence 1.0
“Series: Materials Science and Engineering 1003 (2020) 012132 doi:10.1088/1757-899X/1003/1/012132 that FTIR ranges of the CaCo3/ ZnO fine particles, which were developed in the array of 4000 cm-1 to 400 cm-1.FTIR investigation establishes a”
Kumar 等 - 2020 - Synthesis of calcite-zincite nano composite materi DOI: 10.1088/1757-899X/1003/1/012132 -
Metal oxygen confidence 1.0
“LLM confirmed rule peak-group candidate”
Novel tri-phase heterostructured ZnO–Yb2O3–Pr2O3 nanocomposite; structural, optical, photocatalytic and antibacterial studies DOI: 10.1016/j.ceramint.2020.01.130 -
Silicon-oxygen (Si-O) confidence 1.0
“LLM confirmed rule peak-group candidate”
D'Elia 等 - 2020 - Effect of Alkali Concentration on the Activation o DOI: 10.3390/app10072203 -
Silicon (Si) confidence 1.0
“2a), the bands cm-1 at 463, 810, and 1078 are attributed to the Si-O-Si vibrations which are in agreement with previous”
Molecular separation of ions from aqueous solutions using modified nanocomposites DOI: 10.1038/s41598-021-89371-5 -
Silicon (Si) confidence 1.0
“the one located at 1089 cm-1 in MK to 1007 cm-1 due to the asymmetric stretching of the Si-O-T band 2 The presence of bands characteristic of precursor materials (Figure 4), in addition to the displacement (T is a tetrahedron of Al or Si) i”
Metakaolin-Based Geopolymer with Added TiO2 Particles: Physicomechanical Characteristics DOI: 10.3390/coatings7120233 -
Phosphate (PO4) confidence 1.0
“The peak at 463 cm-1 is due to the bending harmonics of O-P-O and ture, the unit cell volume of LiFePO increases gradually, which is caused by the disorder 4 Fe2+ O=P-O groups.”
Preparation of LiFePO4 Powders by Ultrasonic Spray Drying Method and Their Memory Effect DOI: 10.3390/ma14123193 -
Metal oxygen confidence 1.0
“The activation energy of transformation from goethite to Goethite ferric hydroxide), quartz and kaolin clay 154±15kJmol(cid:2)1 169±8 haematite requires and for an ore are the major components of the encasing sediment matrix mineral and a r”
Evidence of preserved collagen in an Early Jurassic sauropodomorph dinosaur revealed by synchrotron FTIR microspectroscopy DOI: 10.1038/ncomms14220
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