What absorbs at 3386 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 3386 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 3386 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

• Water (H2O) 信頼度 1.0

  “The absorption peak observed at 3386.01 was assigned to the bending and stretching vibrations of adsorbed water and surface hydroxyl group on ZnO [16].”

  Gopinath 等 - 2023 - Mechanical, structural and optical properties of p DOI: 10.15251/JOR.2023.191.23
• 信頼度 1.0

  “cm-1, (representing the OH of alcohol), 1195 (for the amine functional group), 1503 cm-1 cm-1 cm-1 2574 (peaks corresponding to COOH), 2945 (C-H stretching), 3386 (the cm-1 N-H-, C-H-, and O-H-bond stretching of amines and amides), and 3696”

  Antibacterial and Antibiofilm Activity of Ficus carica-Mediated Calcium Oxide (CaONPs) Phyto-Nanoparticles DOI: 10.3390/molecules28145553
• N h 信頼度 1.0

  “(cm-1) 3386 PANI base NH stretching [20,34,33,42] 3.5.”

  Sedenkova 等 - 2006 - In-situ polymerized polyaniline films. Preparation DOI: 10.1016/j.tsf.2006.05.038
• 信頼度 1.0

  “ann3 900 1.48 N-H stretching 3386 77 1.1”

  Ay 和 Aydinli - 2004 - Comparative investigation of hydrogen bonding in s DOI: 10.1016/j.optmat.2003.12.004
• Hydroxyl (O-H) 信頼度 1.0

  “LLM confirmed rule peak-group candidate”

  Fauzi 等 - 2020 - Nanostructured ChitosanMaghemite Composites Thin DOI: 10.3390/polym12071497
• Hydroxyl (O-H) 信頼度 1.0

  “Bands at 2530 cm-1 are standardly related to calcite mineral (CaO) and cm-1 the last different band at 3386 is related to the -OH groups [31-35] the last different band at 3386 cm-1 is related to the -OH groups [31-35] SIMDIS results (Table”

  Direct Polypropylene and Polyethylene Liquefaction in CO2 and N2 Atmospheres Using MgO Light and CaO as Catalysts DOI: 10.3390/ma15030844
• 信頼度 1.0

  “1 day 2 days 8 days 24-day 48-day Asymmetric N-H stretching 3386”

  Khanna 等 - 2010 - In Situ Swelling Behavior of Chitosan-Polygalactur DOI: 10.1155/2010/175264
• Hydroxyl (O-H) 信頼度 1.0

  “However, a broad peak at 3386 was observed, representing a characteristic peak of OH groups of the absorbed water on the surface of nanoparticles.”

  In situ facile green synthesis of Ag–ZnO nanocomposites using Tetradenia riperia leaf extract and its antimicrobial efficacy on water disinfection DOI: 10.1038/s41598-022-19403-1