What absorbs at 1752 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 1752 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 1752 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

  “Absorption peaks due to C=O stretching appeared at 1752 cm-1 due to the ester bonds of the glyceride backbones which make up the oil.”

  Walnut Oil Oleogels as Milk Fat Replacing System for Commercially Available Chocolate Butter DOI: 10.3390/gels8100613
• Acetate 信頼度 1.0

  “The bands at 1692 and icalactivityobservedonvoltammogramduringthesecondcycle cm-1 are ascribed to C=O stretch vibrations in ketones 1752 of cyclic voltammetry oxidation of phenol.”

  Regeneration of expanded graphite electrodes by joined electrochemical and ozone treatment in liquid phase DOI: 10.1007/s10008-018-4098-5
• Alkyl C-H 信頼度 1.0

  “These findings confirmed the presence of an earlier and stretch at around 1752 In the varnished area, the previously undocumented varnish layer underneath the absorptions for the CH and CH stretch are relatively 2 3”

  A non-invasive screening study of varnishes applied to three paintings by Edvard Munch using portable diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) DOI: 10.1186/s40494-019-0327-1
• Acetate 信頼度 1.0

  “cm-1, cm-1 cm-1 into chitosan, new bands at 1751.85 1751.85 and 1743.72 for CS-Ag-H, CS-Ag-M and CS-Ag-L, respectively, are recognizable as C=O stretching vibration [41].”

  Modification of Thin Film Composite Membrane by Chitosan–Silver Particles to Improve Desalination and Anti-Biofouling Performance DOI: 10.3390/membranes12090851
• Alkyl C-H 信頼度 1.0

  “PLGA samples show their cm(cid:0) 1, 2900-3000 major bands at and 1752 agreeing with the C-H and C=O DSC curves of idebenone-loaded PLGA MSs were measured to stretching bands.”

  Design, optimization, and in vitro characterization of idebenone-loaded PLGA microspheres for LHON treatment DOI: 10.1016/j.ijpharm.2022.121504
• 信頼度 0.9

  “Explicit assignment in text: 'cm-1 1752cm-1 oxalyl chloride'”

  Al balawi 等 - 2019 - Synthesis, Characterization, and Application of Po DOI: 10.1155/2019/7064073
• Carbonyl (C=O) 信頼度 0.9

  “Explicit assignment: commonly assigned to carbonyl C=O group”

  Sembiring 等 - 2019 - DOI: 10.1590/0366-69132019653742497
• Carbonyl (C=O) 信頼度 0.9

  “Explicit assignment in text.”

  Assessment of the Effect of PLGA Co-polymers and PEG on the Formation and Characteristics of PLGA-PEG-PLGA Co-block Polymer Using Statistical Approach DOI: 10.15171/apb.2019.045