What absorbs at 2096 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 2096 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.

Possibili assegnazioni di gruppi funzionali

La classifica riflette le prove bibliografiche accumulate, non una singola regola autorevole. Conferma sempre nel contesto del tuo campione.

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 2096 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.

Letteratura dietro queste assegnazioni

• Ring structure affidabilità 1,0

  “Beside of the strong bands of selenocyanate 2096cm(cid:1)1 the main pyridine ring stretching at 1590, 1438 and at the 2061 and 1353cm(cid:1)1 1480cm(cid:1)1 shift to 1615, 1563, and respectively due to the strong binding to the copper atom”

  Kurtaran 等 - 2007 - Synthesis, characterization, crystal structure and DOI: 10.1080/00958970701340511
• Carbonyl (C=O) affidabilità 1,0

  “spectrum for leaf extract, the major stretching frequencies were observed at 3260, 2096, whereas carbonyl stretching vibrations and asymmetric carboxylate stretching were as1583, 1400, 1305, 1066, and 756 cm-1.”

  Green Synthesis of TiO2 Nanoparticles Using Acorus calamus Leaf Extract and Evaluating Its Photocatalytic and In Vitro Antimicrobial Activity DOI: 10.3390/catal12020181
• Carbonyl (C=O) affidabilità 1,0

  “cm-1 As for the low frequency bands, the one at 2096 evident on the reduced sample can be Ni0 safely assigned to linear carbonyl formed on the surface of particles, while the bands between 2000”

  Gopalakrishnan 等 - 2013 - Unravelling the structure and reactivity of suppor DOI: 10.1016/j.apcatb.2013.02.036
• Carboxyl (COOH) affidabilità 1,0

  “78.6629 For carboxylic acid carbonyl functional groups (C = O), FTIR spectrum showed absorption bands of hydroly75.2096 cm-1 sis oil (b and c) at 1711 for stretching vibration,”

  Salimon 等 - 2011 - Hydrolysis optimization and characterization study DOI: 10.1186/1752-153X-5-67
• affidabilità 0,9

  “Same as above.”

  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.