What absorbs at 2322 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 2322 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.

Attributions possibles de groupes fonctionnels

Le classement reflète les preuves bibliographiques accumulées, et non une règle faisant autorité. Confirmez toujours dans le contexte de votre échantillon.

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 2322 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.

Bibliographie derrière ces attributions

• Carbon dioxide confiance 1,0

  “2659 Unassigned band O�C�O 2358 stretching Carbon dioxide 2322 Unassigned band”

  Ferreira 等 - 2020 - Attenuated Total Reflection-Fourier Transform Infr DOI: 10.1155/2020/4343590
• confiance 1,0

  “Fourier Transform Spectroscopy BAB in the pure drug spectrum exhibits the characteristics peaks at 3345 cm-1, 3012 cm-1, 2654 cm-1, and 2322 cm-1 for the N-H stretching, aromatic = C-H stretching, -C-H”

  Design and Characterization of Baricitinib Incorporated PLA 3D Printed Pills by Fused Deposition Modeling: An Oral Pill for Treating Alopecia Areata DOI: 10.3390/polym15081825
• Lewis acid site confiance 1,0

  “The concentration of Brønsted and Lewis sites were obtained cm-1 365 from the integral intensities of the IR bands of adsorbed CD 3CN at 2296 and 2322 cm-1, 366 respectively, by using the extinction factor coefficients reported in Section 2”

  New synthesis routes and catalytic applications of ferrierite crystals. Part 1: 1,8-Diaminooctane as a new OSDA DOI: 10.1016/j.micromeso.2019.109987
• Acetate confiance 1,0

  “of the C=C bond was shifted to a new position, i.e., 2929.43 The emergence of a new sharp peak at 2322.41 cm-1 can be attributed to the stretching of the C-O bond.”

  Development and Optimization of Tamarind Gum–Cyclodextrin-g-Poly(Methacrylate) pH-Responsive Hydrogels for Sustained Delivery of Acyclovir DOI: 10.3390/ph15121527
• Aromatic ring confiance 1,0

  “The FTIR spectra of the TrGO | 3.1.4 Zeta potential (Figure 3b) showed the emergence of an additional absorpcm-1 C=C tion peak at 2322 corresponding to vibrations of DLS analysis showed that the zeta potential (ζ) of GO in an aromatic group”

  Biosynthesis of reduced graphene oxide using Turbinaria ornata and its cytotoxic effect on MCF‐7 cells DOI: 10.1049/nbt2.12057
• confiance 0,5

  “Same as above.”

  Simu 等 - 2022 - Thermal Degradation Process of Ethinylestradiol-Ki DOI: 10.3390/pr10081518