What absorbs at 1040 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 1040 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.

Possible functional-group assignments

Ranking reflects accumulated literature evidence, not a single fixed rule. Always confirm against your sample context.

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 1040 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.

Literature behind these assignments

• Boron nitrogen

  Reported band

  1040 cm-1

  Assignment

  Boron nitrogen

  Material / context

  boron nitride; boron nitride films

  Chowdhury 等 - 2004 - Novel electrodeposition route for the synthesis of DOI: 10.1016/j.matlet.2004.05.079
• Acetate

  Reported band

  1040 cm-1

  Assignment

  Acetate

  Material / context

  amber; copal

  Garcia-Valles 等 - 2023 - Differentiation between copal and amber by their s DOI: 10.1007/s10973-023-12333-8
• C-O single bond

  Reported band

  1040 cm-1

  Assignment

  C-O single bond

  Material / context

  MWCNTs; nanotubes

  Carboxylation treatment of multiwalled carbon nanotubes monitored by infrared and ultraviolet spectroscopies and scanning probe microscopy DOI: 10.1016/j.diamond.2006.08.021
• Silicon nitrogen

  Reported band

  1040 cm-1

  Assignment

  Silicon nitrogen

  Material / context

  silicon oxynitride

  Effect of PECVD silicon oxynitride film composition on the surface passivation of silicon wafers DOI: 10.1016/j.solmat.2011.09.052
• Alkyl C-H

  Reported band

  1040 cm-1

  Assignment

  Alkyl C-H

  Material / context

  epoxy-silane; polypropylene; surface modified pine cone flour

  Alkali and epoxy-silane surface modified pine cone flour reinforced polypropylene/poly (lactic acid) blend: viscoelastic and morphological characterization DOI: 10.1080/01694243.2021.1952677
• Acetate

  Reported band

  1040 cm-1

  Assignment

  Acetate

  Material / context

  protein

  Mcavan 等 - 2020 - Quantification of protein glycation using vibratio DOI: 10.1039/c9an02318f
• Alkyl C-H

  Reported band

  1040 cm-1

  Assignment

  Alkyl C-H

  Material / context

  o-tolunitrile

  A scaled quantum mechanical approach of vibrational analysis of o-tolunitrile based on FTIR and FT Raman spectra, ab initio, Hartree Fock and DFT methods DOI: 10.1016/j.saa.2009.10.002
• Hydroxyl (O-H)

  Reported band

  1040 cm-1

  Assignment

  Hydroxyl (O-H)

  Material / context

  Silver nanoparticles (AgNPs) with Tetrapleura tetraptera leaf extract

  Green synthesis of silver nanoparticles from leaf extract of Tetrapleura tetraptera and its antimicrobial activity DOI: 10.1088/1757-899X/805/1/012032