What absorbs at 585 cm⁻¹ in an FTIR spectrum?
A band near 585 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 585 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 | 5 | 1.0 |
| Alkyl C-H | 2 | 2 | 1.0 |
| Alkene (C=C) | 1 | 1 | 1.0 |
| Hydroxyl (O-H) | 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 |
|---|---|---|---|
| olivine | 585, 3525, 3564 | Hydroxyl (O-H) | 1 |
| silver nanoparticles | 585, 1636, 1631 | Hydroxyl (O-H), Alkyl C-H | 1 |
| chitosan | 585, 1650, 1655 | Alkyl C-H, Hydroxyl (O-H) | 1 |
| PVA | 585, 1660, 2930 | Alkyl C-H, Hydroxyl (O-H) | 1 |
| Fe3O4 | 585, 2358, 1673 | Hydroxyl (O-H), Metal oxygen, Alkyl C-H | 1 |
| quercetin | 585, 1745, 1612 | Alkyl C-H, Hydroxyl (O-H) | 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 585 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
-
Metal oxygen confidence 1.0
“The peaks at 3365 1722 1652 and 1585 (of casein) Micelles cm-1(of and a broad peak at 585 Fe O bond vibration of Fe3O4) were observed for the nanocomplex.”
The interaction, stability and response to an external stimulus of iron oxide nanoparticle–casein nanocomplexes DOI: 10.1016/j.colsurfa.2012.04.049 -
Hydroxyl (O-H) confidence 1.0
“Here, the Figures 2, 6a, 9, 10 and Table 584 S4 clearly show that the integrated OH bands for [Ti-2H] are the most intense OH bands in 585 FTIR spectra for mantle olivines.”
Demouchy 和 Alard - 2021 - Hydrogen, trace, and ultra-trace element distribut DOI: 10.1007/s00410-021-01778-5 -
confidence 1.0
“M and 420 According to the geometrical configuration of metallic oxides, the peak a cm-1 cm-1 at 585 is due to the vibrations of Fe-O complexes [4], and 420 is due to Cu-O n u”
Efficient transformation in characteristics of cations supported-reduced graphene oxide nanocomposites for the destruction of trichloroethane DOI: 10.1016/j.apcata.2017.07.007. -
Alkyl C-H confidence 1.0
“Biomolecules 2021, 11, x 7 of 15 Biomolecules 2021, 11, x 7 of 15 Biomolecules2021,11,206 7of15 peak around 543 and 585cm-1 can be assigned to -CH=CH (cis) vibration;”
Green Synthesis, Characterization, Enzyme Inhibition, Antimicrobial Potential, and Cytotoxic Activity of Plant Mediated Silver Nanoparticle Using Ricinus communis Leaf and Root Extracts DOI: 10.3390/biom11020206 -
Alkyl C-H confidence 1.0
“The peaks saw at 585, 1522 and 2682 are with the substitution of the crystalline particles in the polymer chains C-H2 C-H C-H2 allotted to aliphatic twisting, extending and bending of [16, 17].”
Effect of Al2O3 on structural and dielectric properties of PVP-CH3COONa based solid polymer electrolyte films for energy storage devices DOI: 10.1016/j.heliyon.2019.e02727 -
confidence 1.0
“cm-1 FTIR spectrum (Figure 5A) of bare magnetite MNPs shows bands at 585 and 395 corresponding to the symmetric stretching vibration mode of the Fe-O bond.”
The Fine-Tuned Release of Antioxidant from Superparamagnetic Nanocarriers under the Combination of Stationary and Alternating Magnetic Fields DOI: 10.3390/antiox10081212 -
confidence 1.0
“In the case of cm-1 of functional molecules could be applied and absorbed onto Fe 3O 4, the absorption at 585 is assigned to Fe-O vibra-”
Nicknejad 等 - 2015 - Electrospinning of Cross-Linked Magnetic Chitosan DOI: 10.1208/s12249-015-0336-7 -
Metal oxygen confidence 0.9
“Text: 'bands at 885, 650 and 585 ... correspond to ... Al-O'”
Lancellotti 等 - 2015 - Geopolymers An option for the valorization of inc DOI: 10.1016/j.ceramint.2014.10.008
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