What absorbs at 806 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 806 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.

可能性のある官能基アサイン

ランキングは蓄積された文献証拠を反映しており、単一の権威あるルールではありません。常にサンプルのコンテキストと照合して確認してください。

Possible materials

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 806 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.

これらのアサインの根拠となる文献

• Metal oxygen 信頼度 1.0

  “1(b)) shows strong bands at 806 and 328 due to Nb-O”

  Dwivedi 等 - 2014 - Down-shifting and upconversion photoluminescence i DOI: 10.1039/c4dt01864h
• 信頼度 1.0

  “Indeed, an IR band observed at 806 cm-1 is assigned to the Al-O bending mode of [AlO 6] octahedra [20-21].”

  Souissi 等 - 2022 - Synthesis, Thermal Properties and Electrical Condu DOI: 10.21203/rs.3.rs-1294285/v1
• N h 信頼度 1.0

  “Moreover, it is worth mentioning that F8815 has only primary amino groups as proved by the pair of peaks at 806 and 776 cm-1 cm-1 (NH bending, inset) [36], and the relative strong band at 1639 (NH stretching).”

  Bellido-Aguilar 等 - 2019 - Effect of a fluoroalkyl-functional curing agent on DOI: 10.1016/j.surfcoat.2019.02.006
• Ring structure 信頼度 1.0

  “3 899 J Mater Sci: Mater Electron (2023) 34:899 Page 5 of 15 Generally, the boroxol ring in the borate glass network is usually attributed to the IR absorption Absorbance 806cm(cid:2)1.”

  Effect of CuO doping on structural features, optical absorption and photoluminescence behavior of ZnO-based glasses DOI: 10.1007/s10854-023-10270-8
• C-O single bond 信頼度 1.0

  “cm-1 (COC,CCO and CCH deformation OH, C-H ring and side group vibrations), 871 cm-1 cm-1 cm-1 (glucosidic bond), 709 and 659 (C-OH out-of-plane and stretching), 806 bending) (Mizi et al., 2012).”

  Iordache 等 - 2018 - FT-IR ANALYSIS OF FUSARIUM OXYSPORUM GROWN MYCO-CO DOI: 10.24264/icams-2018.VIII.8
• Hydroxyl (O-H) 信頼度 1.0

  “Other minor changes (shifting/intensity bending at 806 cm-1 cm-1 variation) were also observed in AST at 1362 (in plane OH bend), 1208 (C-O stretching), cm-1 1508 and 1448 (C-C stretching (in ring)) [24].”

  Astragalin from Cassia alata Induces DNA Adducts in Vitro and Repairable DNA Damage in the Yeast Saccharomyces cerevisiae DOI: 10.3390/ijms13032846
• Siloxane (Si-O-Si) 信頼度 1.0

  “styreneSi-O-Si), Si-CH However, the analysis suggests that the material could be 3), 1101 (asymmetric stretching of 1068 (asymmetric Si-O-Si), Si-O-Si), stretching of 806 (symmetric stretching of 678 butadienerubber(SBR)becausesignalsofsuch”

  Non-invasive identification of plastic materials in museum collections with portable FTIR reflectance spectroscopy: Reference database and practical applications DOI: 10.1016/j.microc.2015.07.016
• C c single bond 信頼度 1.0

  “Band (cm-1) 806, 812, 813 806 C-C deformation and stretching vibration in mannans [45] - 827-831”

  Study of Interactions between Titanium Dioxide Coating and Wood Cell Wall Ultrastructure DOI: 10.3390/nano12152678