What absorbs at 1347 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 1347 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 1347 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

  “These were also located in spectrum of ionic liquid [C8mim][NTf 2] at 1347 cm-1, and 1330 while the binding of one of the oxygen atoms of the sulfonic groups of (I) the anion with a water molecule in complex lead to a significant decrease i”

  Study of Lithium-Extraction Systems Based on Benzo-15-Crown-5 Ether and Alkylimidazolium-BasedIonic Liquid DOI: 10.3390/molecules28030935
• Acetate 信頼度 1.0

  “Bands at (v C-O) decreased as the PEGMA ratio cm-1 1347cm-1 1452”

  Hamisu 和 Celik - 2017 - Poly(AN-co-PEGMA)hBNNaClO4 composite electrolyte DOI: 10.1515/epoly-2017-0022
• N-O bond 信頼度 1.0

  “cm-1 two very strong peaks at 1384 and 1347 are assigned to the N-O stretching vibrations The two very strong peaks at 1384 and 1347 cm-1 are assigned to the N-O stretching vibra3-).”

  Deposition of Zinc Oxide Coatings on Wood Surfaces Using the Solution Precursor Plasma Spraying Process DOI: 10.3390/coatings11020183
• Acetate 信頼度 1.0

  “cm-1, cm-1 cm-1 1418 coming from stretching 1055 bandwidth of about 1450 cm-1 are characteristic for bending and 1347 vibrations of both C-O in C-OH and C-C vibration of O-CH and C-C-H in the group in the carbohydrate structure also carbohy”

  Kedzierska-Matysek 等 - 2018 - Application of FTIR spectroscopy for analysis of t DOI: 10.1051/bioconf/20181002008
• N-O bond 信頼度 1.0

  “Still, the Schiff base derivative product that was -NO stretching, 1347.01 and 1315.83 for stretching.”

  Manjare 等 - 2023 - Microwave-Assisted Rapid and Green Synthesis of Sc DOI: 10.1021/acsomega.2c05187
• Alkyl C-H 信頼度 1.0

  “The vibration bands at 3000 and 2923 cm-1 corresponded to C-H stretching of the methyl group while the characteristics bands at 1425 and 1347 cm-1 were due to the C-H symmetric and”

  Fabrication of Colored Polymeric Membrane Using Clay-Based Nano Pigments of Safranin O (SO) Dye DOI: 10.3390/membranes13070619
• Acetate 信頼度 1.0

  “Peak appeared at 1347 is due to the stretching vibration of the C-O group.”

  Naqvi 等 - 2019 - Electrochemical Sensing of Ascorbic Acid, Hydrogen DOI: 10.1002/elan.201800768
• Nitro (NO2) 信頼度 0.9

  “Absorption band for NS liquid phase in absence of CO2.”

  Selective hydrogenation of nitrostyrene to aminostyrene over Pt/TiO2 catalysts : Effects of pressurized carbon dioxide and catalyst preparation conditions DOI: 10.1016/j.supflu.2011.02.016