What absorbs at 1148 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 1148 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 1148 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

• Acetate 信頼度 1.0

  “Similar results regarding changes in pigeon pea starch, there were absorbance bands at 1148, 1076, and 991 cm(cid:0) 1 C-O granule morphology have been reported previously (Kuakpetoon and attributed to bond stretching.”

  Effect of chemical treatments on the functional, morphological and rheological properties of starch isolated from pigeon pea (Cajanus cajan) DOI: 10.1016/j.crfs.2022.10.001
• Acetate 信頼度 1.0

  “Corn starch extruded at 127 °C, 20% moisture content, and 8.8% of citric acid (CSE8) with RS formation 0.87 g/100 g, the adsorption bands at 1148 cm-1 and 1076 correspond to C-O, C-O-H or C-O-R stretching of saccharides, respectively.”

  Optimization of an extrusion cooking process to increase formation of resistant starch from corn starch with addition of citric acid DOI: 10.1002/star.201900150.
• Acetate 信頼度 1.0

  “In the ether stretching region, the electrolytes show three main peaks attributed to cm-1, cm-1 cm-1 the C-O-C stretching of the starch backbone at around 1031 1079 and 1148 cm-1 (Fig.”

  Ternary Natural Deep Eutectic Solvent (NADES) Infused Phthaloyl Starch as Cost Efficient Quasi-Solid Gel Polymer Electrolyte DOI: 10.1016/j.carbpol.2017.03.023
• 信頼度 1.0

  “However, the absorption peak near 1148 corresponds to the S-O vibration 42 of SO (Ghosh and Handoo, 1980, Hughes et al., 1995, Mollah et al., 2000).”

  FTIR study on early age hydration of carbon nanotubes modified cement-based materials DOI: 10.1680/jadcr.16.00167
• Carbohydrate 信頼度 1.0

  “groups had shifted to 3205, 2827, and hemicellulose and cellulose peaks shifted to 1148 and However, 1739cm-1 1009cm-1.”

  Thabede 等 - 2021 - Magnetite Functionalized Nigella Sativa Seeds for DOI: 10.1155/2021/6655227
• C-O single bond 信頼度 1.0

  “LLM confirmed rule peak-group candidate”

  Influence of Graphene Oxide Contents on Mechanical Behavior of Polyurethane Composites Fabricated with Different Diisocyanates DOI: 10.3390/polym
• Alkene (C=C) 信頼度 1.0

  “C=C stretching alkene 1148 C-N stretching amide 020012-6”

  Boudebouz 等 - 2016 - Synthesis and Study of Glycoluril Derivatives DOI: 10.1063/1.4964534
• Acetate 信頼度 1.0

  “1363 1363 1365 1365 1363 1367 1360 1363 δ(O-H) 1241 1239 1238 1231 1235 1240 1241 1242 or C-O anhydroglucose ring C-O stretch of C-O-H 1148 1147 1148 1149 1149 1149 1147 1147 in starch and C-O-C antisymmetric bridge 1077 1078 1077 1078 1078”

  Potato Starch Utilization in Ecological Loose-Fill Packaging Materials—Sustainability and Characterization DOI: 10.3390/ma13061390