What absorbs at 3272 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 3272 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 3272 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

• Water (H2O) 신뢰도 1.0

  “LLM confirmed rule peak-group candidate”

  Characterization of Modified Tapioca Starch in Atmospheric Argon Plasma under Diverse Humidity by FTIR Spectroscopy DOI: 10.1088/0256-307X/30/1/018103
• Hydroxyl (O-H) 신뢰도 1.0

  “cm-1 above 2000 The peaks at 3272 and 2940 correspond to O-H and C-H stretching of PVA, can be seen, equal times (means equal fused volrespectively.”

  Butylina 等 - 2022 - Study on spinnability of arabinoxylan extracted fr DOI: 10.1007/s10570-022-04761-w
• Amine primary 신뢰도 0.8

  “Main N-H stretching of primary amines”

  High iodine adsorption by polyethyleneimine impregnated nanosilica sorbents DOI: 10.1016/j.micromeso.2019.109586
• Hydroxyl (O-H) 신뢰도 0.8

  “Maximum absorption band at 3272 cm-1 for hydroxyl group vibrations.”

  Catalytic Design of Matrix-Isolated Ni-Polymer Composites for Methane Catalytic Decomposition DOI: 10.3390/polym15112534