What absorbs at 2342 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 2342 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 2342 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

  “cm-1 the integration of peak areas at 2927 and 2342 for the aliphatic hydrocarbons and CO 2, 220 integration of peak areas at 2927 cm-1 and 2342 cm-1 for the aliphatic hydrocarbons and CO2, respectively.”

  High Throughput Screening and Characterization Methods of Jordanian Oil Shale as a Case Study DOI: 10.3390/en12163148
• N h 신뢰도 1.0

  “After modified by 2-aminoethanol, the FTIR Polymers 2020, 12, x FOR PEER REVIEW 4 of 13 peaks at 2363 cm-1 and 2342 cm-1, which are assigned to NH+ in rhodamine 6G, disappear.”

  A Fluorescent Polyurethane with Covalently Cross-Linked Rhodamine Derivatives DOI: 10.3390/polym12091989
• Amide 신뢰도 1.0

  “vibrations 2341.89 poor purge stability of the instrument (C=O), Carbonyl group -0.95 5 amide I group stretching 1654.56 1653.61”

  Mycosynthesis of Silver Nanoparticles Using Screened Trichoderma Isolates and Their Antifungal Activity against Sclerotinia sclerotiorum DOI: 10.3390/nano10101955
• Carbon dioxide 신뢰도 0.9

  “Text: 'peak with a wavenumber of 2342 cm-1 captured by CaO as CaCO3'”

  Hydrogen production from autothermal CO2 gasification of cellulose in a fixed-bed reactor: Influence of thermal compensation from CaO carbonation DOI: 10.1016/j.ijhydene.2022.02.018