What absorbs at 3677 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 3677 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 3677 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

• N-O bond 신뢰도 1.0

  “there are no bands in the region at 3677 indicating that in our Li-Zn-rich staurolite vibrations of the O1-H2 dipole are absent (Koch-Müller et al.”

  Feenstra 等 - 2009 - Hydrogen zoning in zinc-bearing staurolite from a DOI: 10.2138/am.2009.3107
• Chitosan 신뢰도 1.0

  “Pristine chitosan (Figure 1a) showed the typical broad absorption cm-1 cm-1 cm-1 cm-1), between 3677 and 3000 (peaks at 3350 and 3289 which correlate cm-1 with the O-H (from chitosan and water) and N-H vibration in N-H groups.”

  Gabriela Chuc-Gamboa 等 - 2021 - Antibacterial Behavior of Chitosan-Sodium Hyaluron DOI: 10.3390/app1103
• Silicon (Si) 신뢰도 1.0

  “which is the characteristic peak for the free terminal cm(cid:4)1, This silanol, while a new peak at 3677 being assigned to the (Si-OH-Al) Access bridged hydroxyl group of zeolite, appears.”

  Huang 等 - 2017 - Synthesis of quinolines from aniline and propanol DOI: 10.1039/c7ra04526c
• Hydroxyl (O-H) 신뢰도 1.0

  “LLM confirmed rule peak-group candidate”

  The Influence of Branched Chain Length on Different Causticized Starches for the Depression of Serpentine in the Flotation of Pentlandite DOI: 10.3390/min12091081
• Hydroxyl (O-H) 신뢰도 0.9

  “Explicit assignment: 'absorption peak of OH appeared at 3677 cm-1'”

  The investigation of adsorption and dissociation of H2O on Li2O (111) by ab initio theory DOI: 10.1016/j.apsusc.2017.02.133
• Hydroxyl (O-H) 신뢰도 0.7

  “Additional band in OH region.”

  Souissi 等 - 2022 - Synthesis, Thermal Properties and Electrical Condu DOI: 10.21203/rs.3.rs-1294285/v1