What absorbs at 3267 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 3267 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.

가능한 작용기 할당

순위는 단일 권위 규칙이 아닌 축적된 문헌 증거를 반영합니다. 항상 샘플 상황에 대해 확인하세요.

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 3267 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.

이 할당의 배경이 되는 문헌

• Amide 신뢰도 1.0

  “(-CONH2), and aromatic amine (C-N), respectively, present Increase in frequency of CS-SP peaks at 3267.39 and 1635.58cm-1 in chitosan.”

  Bande 等 - 2015 - Synthesis and Characterization of Chitosan-Saponin DOI: 10.1155/2015/371529
• Hydroxyl (O-H) 신뢰도 1.0

  “As expected, the main vibrational bands specific to the molecular cm-1, structure of DNA in solution were found in three different regions-namely, 3267 attributed to the stretching vibrations of the OH and NH bonds of the amino acid;”

  Use of Fourier-Transform Infrared Spectroscopy for DNA Identification on Recycled PET Composite Substrate DOI: 10.3390/app12094371
• 신뢰도 1.0

  “ranging from 2927 to 3729 The stretching vibrations of hydrogen-bond O-H and cm-1, N-H groups are assigned to the primary peak at 3267 showing phenolic and alcoU.”

  Efficiency of Fe3O4 Nanoparticles with Different Pretreatments for Enhancing Biogas Yield of Macroalgae Ulva intestinalis Linnaeus DOI: 10.3390/molecules26165105
• Hydroxyl (O-H) 신뢰도 1.0

  “In view of the results obtained in Figure 8, the characteristic absorption peaks of O-H stretching vibration from the interand intra-molecular hydrogen bonds were obcm-1, served at 3267 while C-H stretching vibration from alkyl groups was o”

  Preparation and Physicochemical Characterization of a Diclofenac Sodium-Dual Layer Polyvinyl Alcohol Patch DOI: 10.3390/polym13152459
• Hydroxyl (O-H) 신뢰도 1.0

  “2 cm-1 cm-1 cm-1 cm-1 3267 ν(O-H 3174 ν(O-H stretch 3315 ν(O-H stretch and 3406 ν(O-H stretch and stretch)”

  Silveira 等 - 2021 - DOI: 10.1590/0366-69132021673833101
• Hydroxyl (O-H) 신뢰도 0.9

  “Assigned to O-H stretching vibration.”

  Niu 等 - 2021 - Preparation and Characterization of Biodegradable DOI: 10.1155/2021/6633711