What absorbs at 1562 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 1562 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 1562 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

  “In general, both FTIR spectra are very similar, and the difference is only in intensity, the peak cm-1 at 1562 corresponds to amide II bond of peptide.”

  Comparative Toxicity of Interferon Beta-1a Impurities of Heavy Metal Ions DOI: 10.3390/medicina58040463
• Water (H2O) 신뢰도 1.0

  “The appearance of the peaks at 1562, 1556 or 1541cm(cid:2)1 1562cm(cid:2)1 watercontent,but thepeak at might be related to the participation of water in the was lacking (Fig.”

  Cheng 等 - 2008 - Effect of moisture content on solid-state interact DOI: 10.1016/j.apsusc.2008.08.009
• Amide 신뢰도 1.0

  “intensity of ethylenic bond frequency at 1562 cm-1 The result from this study indicated that the amide II band at 1559 that may contribute to the amine-NH group was specific for CLCG.”

  Synthesis, Characterization, and Antibacterial Activity of Cross-Linked Chitosan-Glutaraldehyde DOI: 10.3390/md11051534
• Amide 신뢰도 1.0

  “Images generated from the normalized intensity of the second derivative of the FTIR cm-1) cm-1): and the shifted protein amide I band (1664 (d, e) for controls (skin spectra, centered around the hydroxamate amide II band (1562”

  High-Sensitivity Permeation Analysis of Ultrasmall Nanoparticles Across the Skin by Positron Emission Tomography DOI: 10.1021/acs.bioconjchem.1c00017
• 신뢰도 1.0

  “Notable bands at 1578cm-1, 1562cm-1 may be assigned to O-C-O stretching or N -coordination through alkaloids”

  Synthesis of nanostructured CeO2 by chemical and biogenic methods: Optical properties and bioactivity DOI: 10.1016/j.ceramint.2020.02.204
• Aromatic ring 신뢰도 1.0

  “RIP Fourier Transmission Infra-Red spectroscopy (FTIR) and it is found that the important peaks cm-1 cm-1 were appeared at 490 due to the benzenoid ring stretching vibration, 1562 for C cm-1 quinoid ring vibration and 743 corresponds to the”

  Antistatic and Dielectric properties of one-dimensional Al2+:Nd2O3 nanowire doped polyaniline nanocomposites for electronic application DOI: 10.1016/j.sna.2018.07.018
• Amide 신뢰도 1.0

  “vibrations of 1562 (amide I) and the bending vibration But upon the forming of BPN, the spectral”

  Shan 等 - 2010 - Quantitative analysis of hemoglobin content in pol DOI: 10.1007/s10856-009-3864-4
• C=n 신뢰도 1.0

  “3c) The presence of peaks appearing at the wave numshowed the shifting of peak at wave number of cm-1 on the Y-IPs' IR spectra bers of 1562 and 1600 cm-1, 1562 assigning to C=N stretching vibration of before and after leaching indicates the”

  Zulfikar 等 - 2017 - Separation of Yttrium from Aqueous Solution Using DOI: 10.3103/S1067821217060189