What absorbs at 3087 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 3087 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

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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 3087 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

• 신뢰도 1.0

  “5, the specic bands of NTZ cm1 cm1 (alone) appeared at 3358 (stretching of N-H bond), 3087 and 3094 (stretching of C-H and O-H”

  Ali 等 - 2023 - Nitazoxanide and azithromycin for the early treatm DOI: 10.21203/rs.3.rs-1745239/v1
• Alkyl C-H 신뢰도 1.0

  “Explicit assignment in text: 'and 3087 For the cm-1 (cid:1)NH th'”

  Rozenberg 等 - 2004 - Low temperature FTIR spectroscopy and hydrogen bon DOI: 10.1016/S1386-1425(03)00251-8
• Hydroxyl (O-H) 신뢰도 1.0

  “GS showed the characteristic cm-1 cm-1 peak at 3087 (phenolic OH) and 1503 of carbonyl stretching vibration.”

  Formulation of Genistein-HP Cyclodextrin-Poloxamer 188 Ternary Inclusion Complex: Solubility to Cytotoxicity Assessment DOI: 10.3390/pharmaceutics13121997
• N h 신뢰도 0.9

  “Amide B band associated with N-H stretching.”

  Triple-helical collagen hydrogels via covalent aromatic functionalization with 1,3-Phenylenediacetic acid DOI: 10.1039/C3TB20218F.