What absorbs at 2837 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 2837 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 2837 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

• Alkyl C-H 신뢰도 1.0

  “The major contribution to asymmetric stretching at 3 2945cm(cid:3)1, 2906cm(cid:3)1, the higher protein-to-lipid ratio in the Xoo strains relative to the the CH asymmetric stretching at and the 2 cm(cid:3)1 COO(cid:3) Xoc strains comes from”

  Differentiation in MALDI-TOF MS and FTIR spectra between two pathovars of Xanthomonas oryzae DOI: 10.1016/j.saa.2014.06.056
• Methoxy (OCH3) 신뢰도 1.0

  “The methoxy band clearly indicated the existence of BaSO nanoparticles in the poly(o-anisidine) matrix at 2837 cm-1, demonstrating the inter4 aniline) in the spectra.”

  Synthesis, Characterization, and Antibacterial Potential of Poly(o-anisidine)/BaSO4 Nanocomposites with Enhanced Electrical Conductivity DOI: 10.3390/pr10091878
• Acetate 신뢰도 1.0

  “In the infrared spectrum of DEA (curve b in Figure 2A), is the C-N bond, 1310 cm-1 is the bending vibration of the C-C bond and 765 cm-1 is the stretching cm-1 cm-1 3296 is the stretching vibration peak of -OH while 2837 is the stretching v”

  Inhibition of Poly(ethylenediaminetetraacetic acid-diethanolamine) on Deposition of Calcium Sulfate Crystal in Simulated Industrial Water DOI: 10.3390/cryst10060544
• Alkyl C-H 신뢰도 1.0

  “The bands at 2944 and 2837 cm-1, which could be detected in the ligands' spectra (Figure S4), corresponded to the stretching of C-H from methoxy-groups present”

  Tailoring Nanoadsorbent Surfaces: Separation of Rare Earths and Late Transition Metals in Recycling of Magnet Materials DOI: 10.3390/nano12060974
• Alkyl C-H 신뢰도 1.0

  “The bands at around 2973, 2932, 2903, and 2837 cm-1 were due to the symmetric and asymmetric stretching vibration of C-H bonds, while the bands around 1420”

  Effect of Molecular Weight and Degree of Substitution on the Physical-Chemical Properties of Methylcellulose-Starch Nanocrystal Nanocomposite Films DOI: 10.3390/polym13193291
• Alkyl C-H 신뢰도 0.9

  “attributed to C-H”

  Alassod 等 - 2021 - PolypropyleneLigninPOSS Nanocomposites Thermal DOI: 10.3390/ma14143950