What absorbs at 2073 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 2073 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.

可能的官能团归属

排名反映了累积的文献证据，而非单一的权威规则。请始终对照您的样品背景进行确认。

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 2073 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.

这些分配背后的文献

• Acetate 置信度 1.0

  “Another peak at 2073 cm-1 is barely detectable for the stretching of surface carbonyl, Cu-C-O [30,36,42].”

  The Activity of Ultrafine Cu Clusters Encapsulated in Nano-Zeolite for Selective Hydrogenation of CO2 to Methanol DOI: 10.3390/catal12111296
• Protein 置信度 0.9

  “Same context as above.”

  Biogenic Synthesis Of Silver Nanoparticles Using Pod Extract Of Cola Nitida: Antibacterial, Antioxidant Activities And Application As Additive In Paint DOI: 10.1016/j.jtusci.2015.10.010
• 置信度 0.9

  “Text: 'strong bands at 2096 and 2073 cm-1 can be assigned to the stretching vibration of C≡N bond of thiocyanate ligand'”

  Synthesis, crystal structure, and characterization of cyclohexylammonium tetraisothiocyanatocobaltate(II): A single-source precursor for cobalt sulfide and oxide nanostructures DOI: 10.1016/j.heliyon.2019.
• 置信度 0.9

  “Assigned to Pt-CO species on hydrated Pt/A380(800).”

  Satter 等 - 2020 - Water-Resistant Pt Sites in Hydrophobic Mesopores DOI: 10.1021/acscatal.0c02816