What absorbs at 1012 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 1012 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 1012 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

• Acetate confidence 1.0

  “whilstAPIhadlesspositivecharges,reducingtheinteraction CP presented spectra with a stretching absorption band between the oppositely charged moieties, which resulted cm-1 cm-1 et al., of the C-O-C bond at 1012 and a band at 3247 in a low co”

  Garcia-de la Rosa 等 - 2023 - Rheological and structural properties of complex c DOI: 10.24275/rmiq/Alim3003
• Acetate confidence 1.0

  “The spectrum AgNPs exhibited absorption peaks at 1047, 1414, 2341, cm-1 obtained with FT-IR spectrum showed prominent absorbance 2359, and 3335 which could be attributed to the vinyl (C-O), (N-H) (C-H), (O-H), bands at 1012.2, 1254.21, 1365”

  Green synthesis of silver nanoparticles using Holarrhena antidysenterica (L.) Wall.bark extract and their larvicidal activity against dengue and filariasis vectors DOI: 10.1007/s00436-017-5711-8
• Silicon (Si) confidence 1.0

  “Si-O by identifying the presence of inorganic funcstretching vibration in the tetrahedral layer is tional groups in the clay structure through abindicated by a sharp absorption band at 1012 sorption bands of the FTIR spectrum.”

  Natural Clay of Pasaman Barat Enriched by CaO of Chicken Eggshells as Catalyst for Biodiesel Production DOI: 10.9767/bcrec.15.3.8097.662-673)
• Acetate confidence 1.0

  “C-H stretching), 1247 (among others C-H stretching and O-H deformations in carbohydrates), cm-1 cm-1 αβ1012 (C-O stretching in carbohydrates) and 939-734 (C-H vibrations related to the and cm-1) pyranose compounds, both glycosidic and non-g”

  Pleurotus Mushrooms Content in Glucans and Ergosterol Assessed by ATR-FTIR Spectroscopy and Multivariate Analysis DOI: 10.3390/foods9040535
• C c single bond confidence 1.0

  “The C-C stretching is indicated by characteristic bands at 1012 cm-1 and 1103 cm-1.”

  Functionalized KIT-6/Polysulfone Mixed Matrix Membranes for Enhanced CO2/CH4 Gas Separation DOI: 10.3390/polym12102312
• Alkyl C-H confidence 1.0

  “The peak at 1159 cm-1 is produced by the cm-1 vibration of C-O, while the peaks at 1079 and 1012 belong to the stretching vibration of C-O in stretching vibration of C-O, while the peaks at 1079 and 1012 cm-1 belong to the stretching vibrat”

  Flotation and Adsorption of a New Polysaccharide Depressant on Pyrite and Talc in the Presence of a Pre-Adsorbed Xanthate Collector DOI: 10.3390/min7030040
• Amide confidence 1.0

  “chalcone carbonyl carbon symmetrical stretching absorption appeared at 1727 An cm-1 absorption band that appeared around 1306 corresponds to C-N stretching and the cm-1 sharp absorption bands that appeared around 1012 and 771 are due to imi”

  Synthesis and In Vitro Antimicrobial Evaluation of Photoactive Multi—Block Chalcone Conjugate Phthalimide and 1,8-Naphthalimide Novolacs DOI: 10.3390/polym13111859
• Aromatic ring confidence 1.0

  “immediately below 3000 The peaks in the 1000cm-1 1300 region corresponded to C-H bending of aromatic carbons and the C-O stretching of alkoxy cm-1 ether, while the absorption at ~1012 could be assigned to H-vibration attached to the aromati”

  Fibers spreading worldwide: Microplastics and other anthropogenic litter in an Arctic freshwater lake DOI: 10.1016/j.scitotenv.2020.137904