What absorbs at 3580 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 3580 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 3580 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

• Hydroxyl (O-H) 신뢰도 1.0

  “The low peak-intensity of O-H stretching at 3580 at 670 K showed PP pyrolysis, which is consistent with the previously proposed mechanism [51].”

  Pyrolysis Process of Mixed Microplastics Using TG-FTIR and TED-GC-MS DOI: 10.3390/polym15010241
• Hydroxyl (O-H) 신뢰도 1.0

  “Interestingly, a phenolic OH signal (>3580 cm-1) appeared in the”

  Investigation of the Drug Carrier Properties of Insoluble Cyclodextrin Polymer Microspheres DOI: 10.3390/biom12070931
• Water (H2O) 신뢰도 1.0

  “Olsson and Salmén 2004) Bands at 3580 and 3555 were assigned to loosely bond water or perhaps to non-hydrogen bonded O(2)H and O(6)H groups in amorphous”

  High-yield cellulose hydrolysis by HCl vapor: cocrystallization, deuterium accessibility and hightemperature thermal stability DOI: 10.1007/s10570-020-03002-2
• Acetate 신뢰도 1.0

  “Those results cm-1 vibrations of C-O) and at 3580 (stretching vibrations proved that by chemical modification of low cost, renewof OH) are characteristic for the formation of aldehyde, able and available potato starch by benzyl methacrylate”

  Worzakowska - 2016 - Starch-g-poly(benzyl methacrylate) copolymers Char DOI: 10.1007/s10973-016-5328-7
• Hydroxyl (O-H) 신뢰도 0.9

  “Text: '3580 cm-1 for -OH groups (stretching vibrations)'”

  Zdarta 等 - 2017 - Lipase B from Candida antarctica Immobilized on a DOI: 10.3390/catal7010014
• 신뢰도 0.9

  “Text: 'OH-Mg and OH-Mg2Al peaks were around 3580'”

  Zhang 等 - 2013 - Midand near-infrared spectroscopic investigation DOI: 10.1016/j.jcis.2013.08.008
• Hydroxyl (O-H) 신뢰도 0.8

  “Peaks attributed to OH incorporation.”

  Zhang 等 - 2017 - Mechanisms of Incorporation of Hydroxyl in Coesite DOI: 10.1166/jnn.2017.14519