What absorbs at 1151 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 1151 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 1151 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

• Acetate 신뢰도 1.0

  “[8] also 2 cm-1 found a sharp peak at 1151 due to the stretching-shaking of C=O ester groups of cm-1 triglycerides and of 1163 for walnut oils during roasting.”

  Characterizing the Bioactive Ingredients in Sesame Oil Affected by Multiple Roasting Methods DOI: 10.3390/foods11152261
• Acetate 신뢰도 1.0

  “In the synchronous C-O spectra of both film types, the strongest autopeak corresponded to the stretching mode, appearing at1151and1168cm-1fortheLBandspin-coatedfilms,respectively.Thissuggeststhattheconformation of the tert-butoxy group chan”

  Shin 等 - 2002 - Structural comparison of Langmuir-Blodgett and spi DOI: 10.1021/la020135d
• Acetate 신뢰도 1.0

  “The FTIR band characteristics are as follows: is N-H of amines and C = C stretching of cm-1 alkene, and 1151 is C-O stretching and C-N stretching of amine [32-37].”

  Multivariate analysis for FTIR in understanding treatment of used cooking oil using activated carbon prepared from olive stone DOI: 10.1371/journal.
• Ester 신뢰도 1.0

  “4a, the intensity and frequency of the ester stretching 1151cm(cid:2)1 liver cells.”

  Biophysical evaluation of physiological effects of gilthead sea bream (Sparus aurata) farming using FTIR spectroscopy DOI: 10.1016/j.foodchem.2013.08.111
• 신뢰도 1.0

  “SEM images (Figure 3(a)) of metakaolin showed that the brations of O-C-O due to atmospheric carbonation on the 1151cm-1 sample is a heterogeneous material consisting of irregusurface of kaolin.”

  El Alouani 等 - 2019 - Preparation, Characterization, and Application of DOI: 10.1155/2019/4212901
• Carbohydrate 신뢰도 1.0

  “At wavenumber 1151 and 1177 a peak is formed β-CD due to stretching within the COCs present in cellulose and [8,12].”

  Grgac 等 - 2022 - The Effect of Ultrasonic Treatment on the Binding DOI: 10.3390/ma15020470
• Chitosan 신뢰도 1.0

  “Chitosan peaks were observed at 897 and 1151 cm-1 cm-1”

  Hedayatyanfard 等 - 2019 - Semi-IPN Films and Electrospun Nanofibers Based on DOI: 10.22037/ijpr.2019.1100712
• Alkyl C-H 신뢰도 1.0

  “Bands 1151 and 1057 can be assigned cm-1 O stretch vibrations in resorcinol, and the band at 964 cm-1 probably belongs to the C-H to C-O stretch vibrations in resorcinol, and the band at 964 probably belongs to deformation vibration in the”

  Kinetics of Resorcinol-Formaldehyde Condensation—Comparison of Common Experimental Techniques DOI: 10.3390/gels8010008