What absorbs at 453 cm⁻¹ in an FTIR spectrum?
A band near 453 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 453 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 |
|---|---|---|---|
| Metal oxygen | 6 | 6 | 1.0 |
| Hydroxyl (O-H) | 4 | 4 | 1.0 |
| Carboxyl (COOH) | 2 | 2 | 1.0 |
| Silicon (Si) | 2 | 2 | 1.0 |
| Amide | 2 | 2 | 1.0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1.0 |
| Water (H2O) | 1 | 1 | 1.0 |
| Methoxy (OCH3) | 1 | 1 | 1.0 |
| C-O single bond | 1 | 1 | 1.0 |
| Methacrylate | 1 | 1 | 1.0 |
| Ketone | 1 | 1 | 1.0 |
| Ester | 1 | 1 | 1.0 |
| Carbonyl (C=O) | 1 | 1 | 1.0 |
| Acetate | 1 | 1 | 1.0 |
| Metal sulfur | 1 | 1 | 1.0 |
| Ring structure | 1 | 1 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
| Secondary amine | 1 | 1 | 1.0 |
| C n single bond | 1 | 1 | 1.0 |
| S s | 1 | 1 | 0.8 |
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 |
|---|---|---|---|
| Chitosan | 453, 1650, 1655 | Hydroxyl (O-H) | 1 |
| CuO | 453, 1000, 505 | Metal oxygen, Hydroxyl (O-H), Carboxyl (COOH) | 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 453 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
-
Amide confidence 1.0
“The FTIR spectra of PANI shows the 3 cm-1 characteristics peaks at 453 and 498 due to C - N and C - H bending vibration the out of”
Antistatic and Dielectric properties of one-dimensional Al2+:Nd2O3 nanowire doped polyaniline nanocomposites for electronic application DOI: 10.1016/j.sna.2018.07.018 -
Metal sulfur confidence 1.0
“An additional cm(cid:1)1 Mo-S appears at 1116.4 and the characteristics peaks of cm(cid:1)1, peak is observed at 453.35 which corresponds to the cm(cid:1)1 cm(cid:1)1.”
Verma 等 - 2021 - The functionalization of polyacrylamide with MoS2 DOI: 10.1039/d0se01877e -
Hydroxyl (O-H) confidence 1.0
“However, the IR spectra of the sample collected from golf course area 2 (GCU2) show highest intensity in region cm-1 3500-3000 which representing the OH functional group, 3000-2800 corresponds to methylene C-H asymmetric 453 cm-1 stretching”
Abu Bakar 等 - 2014 - Metabolic Fingerprinting of Lichen Usnea baileyi b DOI: 10.1063/1.4895239 -
Acetate confidence 1.0
“Therewere three drastic decrement intensity peaks of C=O, C-OH, and C-O groups with the generation of new peaks at 576 cm-1, 505 cm-1 and 453 cm-1 corresponding to CuO stretching vibrations, that were explained by Gulati et al.”
Effect of rGO wt.% on the Preparation of rGO/CuO Nanocomposites at Different Test Periods and Temperatures DOI: 10.3390/cryst12101325 -
Metal oxygen confidence 1.0
“LLM confirmed rule peak-group candidate”
Dwivedi 等 - 2019 - Effect of Synthesis Techniques on the Optical Prop DOI: 10.1021/acsomega.8b03606 -
Hydroxyl (O-H) confidence 1.0
“Fritsch et al.: OH stretching vibrations in serpentines 453 (wecm-1) (2v) Table 3.”
Fritsch 等 - 2021 - Structural, textural, and chemical controls on the DOI: 10.5194/ejm-33-447-2021 -
Silicon (Si) confidence 1.0
“The strong bands at 992 cm-1and 453 cm-1 were caused by -XO4 and O-X-O groups, respectively (X means Si/Al), and the band at 3332 cm-1 corresponded to the Si-OH group and Al-OH group on the surface of zeolite molecular sieve framework [46].”
Chitosan Modified Zeolite Molecular Sieve Particles as a Filter for Ammonium Nitrogen Removal from Water DOI: 10.3390/ijms21072383 -
Metal oxygen confidence 1.0
“cm-1, cm-1 The identified Cu-O peak locations were at 592, 607, and 665 cm-1, whereas 453 cm-1 was identified Cu-O peak locations were at 592, 607, and 665 whereas 453 was The identified Cu-O peak locations were at 592, 607, and 665 cm-1, w”
Novel Copper Oxide Bio-Nanocrystals to Target Outer Membrane Lectin of Vancomycin-Resistant Enterococcus faecium (VREfm): In Silico, Bioavailability, Antimicrobial, and Anticancer Potential DOI: 10.3390/molecules27227957
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