What absorbs at 3057 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 3057 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.

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 3057 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

• Amide 신뢰도 1.0

  “irradiation with Co gamma rays and the spectrum changed cm-1) cmBoth amide A (3323 and amide B band (3057 notably as a function of doses.”

  Bessalah 等 - 2023 - Effect of Gamma Radiation on Novel Gelatin Extract DOI: 10.17582/journal.pjz/20220218020207
• 신뢰도 1.0

  “Characteristic bands at 3460, 3363, 3196 and 3057 cm-1 due to stretching vibrations of the amine group in the physical mixture”

  Garbacz 等 - 2020 - Structural Characterization of Co-Crystals of Chlo DOI: 10.3390/pharmaceutics12070648
• Carbonyl (C=O) 신뢰도 1.0

  “The FT-IR spectrum of monomer 3c has been shown in in the multitude of weak but cumulatively important C-H cm-1 Figure 1 which showed the distinct band at 1687 … O, C-H … π and π … π stacking interactions in the crysthat can be assigned to”

  Liquid phase synthesis of aromatic poly(azomethine)s, their physicochemical properties, and measurement of ex situ electrical conductivity of pelletized powdered samples DOI: 10.1080/15685551.2016.1231042
• Alkyl C-H 신뢰도 1.0

  “it suggested that in skin cm-1 3007 was due to the symmetric ch stretching and 2 cancer most of the hydrogen bonds in the c-o groups of cell cm-1 asymmetric stretching modes shifted at 3057 in the breast proteins disappeared, as well as con”

  Simonova 和 Karamancheva - 2013 - APPLICATION OF FOURIER TRANSFORM INFRARED SPECTROS DOI: 10.5504/BBEQ.2013.0106
• Alkyl C-H 신뢰도 1.0

  “cm-1-N-H For unirradiated CIP, the characteristic vibrations are: 3390 stretchcm-1-stretching ing vibration (piperazinyl), 3057 C-H stretching vibration (aromatic”

  Optical Characterization of Ciprofloxacin Photolytic Degradation by UV-Pulsed Laser Radiation DOI: 10.3390/molecules26082324
• Alkyl C-H 신뢰도 0.9

  “Explicit assignment: 'assigned to CH asymmetric'.”

  Optical Absorption and Visible Photoluminescence from Thin Films of Silicon Phthalocyanine Derivatives DOI: 10.3390/ma7096585
• 신뢰도 0.7

  “Snippet: 'asymmetric stretching at 3057 groups, the ¼¼CH'”

  Aresta 等 - 2012 - Initiated-chemical vapor deposition of organosilic DOI: 10.1116/1.4711762