What absorbs at 3083 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 3083 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 3083 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

• Aromatic ring 신뢰도 1.0

  “The 2 cm.-1 cm-1 aromatic C-H stretching is visible at 3083 N-H bending is seen at 1620 while carbonyl cm-1.”

  Synthesis of Aloevera/Acrylonitrile based Nanoparticles for targeted drug delivery of 5-Aminosalicylic acid DOI: 10.1016/j.ijbiomac.2017.08.085
• Alkyl C-H 신뢰도 1.0

  “They (C-H stretching reported that the frequencies of allicin in FTIR spectra were 3083 cm-1 2), 2978 cm-1 (C-H stretching symmetric of =CH 2),1634 cm-1 (a medium asymmetric of =CH”

  Tasci 等 - 2016 - Determination of alliin and allicin in the plant o DOI: 10.17660/ActaHortic.2016.1143.19
• Aromatic ring 신뢰도 1.0

  “The aromatic C-H stretching peaks at 3083, 3063 and 3030 are evident together with the non-aromatic C-H stretching bands at 2959 (-CH 3), 2924 (-CH 2) and 2870 (-CH 3) cm-1.”

  Germinario 等 - 2016 - Chemical characterisation of spray paints by a mul DOI: 10.1016/j.microc.2015.04.016
• Hydroxyl (O-H) 신뢰도 1.0

  “A broad band centered around 3083 cm-1 in Mt was due to the H-O-H stretching vibration surface adsorbed water of Mt and the band at 2510 cm-1 was due to surface and/or interlayer water arising because of the combination of two vibrational f”

  Fabrication of Colored Polymeric Membrane Using Clay-Based Nano Pigments of Safranin O (SO) Dye DOI: 10.3390/membranes13070619