What absorbs at 1266 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 1266 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.

可能的官能团归属

排名反映了累积的文献证据，而非单一的权威规则。请始终对照您的样品背景进行确认。

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 1266 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.

这些分配背后的文献

• C c single bond 置信度 1.0

  “In the DCNP, the bands observed in IR at 1468, 1340, 1304, and in IR and 1348, 1569cm(cid:2)1 cm(cid:2)1 1635 and 1309 and 1183 has been assigned to C-C stretching and in in Raman for DCNP and the band observed 1266cm(cid:2)1”

  Arivazhagan 和 Rexalin - 2013 - Vibrational spectra, UV-vis spectral analysis and DOI: 10.1016/j.saa.2013.01.029
• Hydroxyl (O-H) 置信度 1.0

  “1266cm-1 ν corresponds to the phenolic implies that [23] W.William,OrganicSpectroscopy,thirded.,ELBS,Hampshire,1991 C-O (Chapter 2).”

  Das 等 - 2004 - Kinetics and adsorption behaviour of salicylate on DOI: 10.1016/j.colsurfa.2004.02.010
• Amide 置信度 1.0

  “amide I vibrations were placed at 1266 1544 and 1655 Symmetric as well as”

  Depciuch 等 - 2022 - EFFECT OF HIGH BLOOD CORTISOL CONCENTRATION ON THE DOI: 10.21203/rs.3.rs-228476/v1
• Oxygen heterocycle 置信度 1.0

  “LLM confirmed rule peak-group candidate”

  Wang 和 Wang - 2006 - Adsorption characteristics of metal complexes by c DOI: 10.1016/j.reactfunctpolym.2005.08.011
• Aromatic ring 置信度 1.0

  “The peak at 1568 cm-1 was linked to the quinoid ring's (C=C) stretching The characteristic peak was observed at 1266 after the addition of 5% of the”

  Synthesis, Characterization, and Antibacterial Potential of Poly(o-anisidine)/BaSO4 Nanocomposites with Enhanced Electrical Conductivity DOI: 10.3390/pr10091878
• Hydroxyl (O-H) 置信度 1.0

  “Group Compound Class α, β-unsaturated 1622 C=C stretching ketone 1403 O-H bending carboxylic acid 3425 O-H stretching alcohol 1266”

  The Antifungal Properties of Tamarix aphylla Extract against Some Plant Pathogenic Fungi DOI: 10.3390/microorganisms11010127
• Carboxyl (COOH) 置信度 1.0

  “In addition, the presence of characteristic bands at 1692 cm-1, 1530 cm-1, 1266 cm-1, and 724 cm-1 in the GA Raman spectrum Molecules2022,27,279 8of17 (Figure 2b) can be related to the carboxylic group in the non-polymerized molecule.”

  Vibrational Study (Raman, SERS, and IR) of Plant Gallnut Polyphenols Related to the Fabrication of Iron Gall Inks DOI: 10.3390/molecules27010279
• Carbonyl (C=O) 置信度 1.0

  “ing vibration), 2951 2930 2872 1467 (aliphatic C-H vibrations), bration), 2951 cm-1, 2930 cm-1, 2872 cm-1, 1467 cm-1 (aliphatic C-H vibrations), 1695 cm-1 cm-1 cm-1, cm-1 1695 (C=O ester vibration), 1266 and 1162 (C-O-C ester and lactone (C”

  Preformulation Studies of Ezetimibe-Simvastatin Solid Dispersions in the Development of Fixed-Dose Combinations DOI: 10.3390/pharmaceutics14050912