What absorbs at 2357 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 2357 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 2357 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

• Hydroxyl (O-H) 신뢰도 1.0

  “[41] where phytocatalytic synthesis of AgNPs using Synsepalum dulcificum showed a prominent peak at cm-1 2357 and 1641 which revealed the involvement of phenolic compounds and proteins.”

  Kumar 等 - 2017 - Photo-induced and phytomediated synthesis of silve DOI: 10.1016/j.jphotobiol.2017.04.022
• Acetate 신뢰도 1.0

  “stretching vibration bands of imidazolium ring appeared at 2357 The active C-O stretching cm-1 vibration band appears at 1461 and corresponding C-O bending vibration peak is observed cm-1.”

  Ionic liquid mediated morphologically improved lanthanum oxide nanoparticles by Andrographis paniculata leaves extract and its biomedical applications DOI: 10.1016/j.jre.2019.06.006
• Carbon dioxide 신뢰도 1.0

  “Medium stretching O=C=O 2357 Carbon dioxide Strong stretching C-H 2889 Alkane Medium stretching N-H 3325 Aliphatic primary amine”

  Development and characterization of natural sourced bioplastic for food packaging applications DOI: 10.1016/j.heliyon.2023.e13538
• Carbon dioxide 신뢰도 1.0

  “9 TG and corresponding DTG curves for poly(TRIM) and 4VPTRIM microspheres obtained in air atmosphere are water (bands in the region of 3,700-3,600 and cm-1) 1,600-1,400 and carbon dioxide (peaks at 2357, cm-1) 2311 and 670 [18, 19].”

  Grochowicz - 2014 - Investigation of the thermal behavior of 4-vinylpy DOI: 10.1007/s10973-014-4066-y
• Ammonium 신뢰도 1.0

  “Anotherpeakaround2356.8330cm-1 cm-1 to 2379.7074 was observed in all the spectra except PGG which was possibly due to cm-1 ammonium ions (N-H).”

  Hydrolysis, Microstructural Profiling and Utilization of Cyamopsis tetragonoloba in Yoghurt DOI: 10.3390/fermentation9010045
• Carbon dioxide 신뢰도 1.0

  “evolution of carbon dioxide (peaks at 2357, 2311 and Figure 12 presents the Gram-Schmidt plots obtained cm-1) 670 during the thermal decomposition of the parent and carbon monoxide (peaks at 2174,”

  Synthesis and thermal properties of parent and modified DMN–co-GMA copolymers DOI: 10.1007/s10973-018-7162-6
• Silicon-oxygen (Si-O) 신뢰도 0.9

  “Same sentence as peak 687, attributed to Si-O bonds.”

  Huseynov 等 - 2018 - Fourier transform infrared spectroscopic study of DOI: 10.1142/S0217979218500741
• 신뢰도 0.9

  “Explicit assignment in text.”

  Samra 和 Athar - 2009 - Novel Synthesis of Mannosamine Conjugated Magnetic DOI: 10.1007/s12257-008-0314-y