What absorbs at 1810 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 1810 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 1810 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

• Carbonyl (C=O) 신뢰도 1.0

  “LLM confirmed rule peak-group candidate”

  Campanale 等 - 2023 - Fourier Transform Infrared Spectroscopy to Assess DOI: 10.3390/polym15040911
• Carbonyl (C=O) 신뢰도 1.0

  “The spectra at WG, with bands at 2940 cm-1 cm-1 cm-1 spectra at 1800 and 1810 reflected the stretching vibration of the carbonyl group 1800 cm-1 and 1810 cm-1 reflected the stretching vibration of the carbonyl group (C=O), cm-1 (C=O), which”

  Bao 等 - 2021 - Green Extraction of Phenolic Compounds from Lotus DOI: 10.3390/foods10020239
• Anhydride 신뢰도 1.0

  “cm-1 peaks at 1850-1800 and at 1790-1740 (asymmetric and symmetric stretching groups).[31] vibrations of the two carbonyl In the PSA samples, the peak area of the cm-1 anhydride peak at 1810 (which did not overlap with other peaks) was used”

  Deng 等 - 2019 - Degradation of Polymer Films on Surfaces A Model DOI: 10.1002/macp.201900121.
• Aromatic ring 신뢰도 1.0

  “Particularly, the simultaneous cm-1), (3700-3000 aromatic =C-H stretching vibrations (3100 presence of the biomolecules in the multilayer enhanced cm-1), cm-1), alkyl C-H stretching vibrations (2920 aromatic C-H significantly the cell viabi”

  Alginate-based hydrogels functionalised at the nanoscale using layer-by-layer assembly for potential cartilage repair DOI: 10.1039/c7bm00525c
• N-O bond 신뢰도 1.0

  “1810cm-1 and are assigned to chelating bidentate corresponding to adsorbed NO dimers on Pt is very at nitrates.Thesebandsshifttohigherorlowerfrequenciescompared weakandishardlytodistinguish.Understeady-stateNO-O reac2 175◦C, tothoseformedat”

  Catalytic oxidation of NO over TiO2 supported platinum clusters. II: Mechanism study by in situ FTIR spectra DOI: 10.1016/j.cattod.2010.04.038
• 신뢰도 0.9

  “Text: 'the one at 1810 corresponded to the asymmetric stretching vibration'”

  Dorner 等 - 2015 - Toward Self-Regenerating Antimicrobial Polymer Sur DOI: 10.1021/acsmacrolett.5b00686.