What absorbs at 1047 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 1047 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 1047 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

• Carbohydrate confidence 1.0

  “AHMT230 41.44 22.39 36.01 Absorption bands at 1047 are associated with starch grains' crystalline and amorphous domains, respectively and the ratio ± =”

  The effect of heat moisture treatment on crystallinity and physicochemical-digestibility properties of purple yam flour DOI: 10.1016/j.foodhyd.2021.106889
• C c single bond confidence 1.0

  “As, CTAB cm(cid:3)1 cm(cid:3)1 (]C-H wagging),4,34-36 acteristic peaks at 793 and LA coacervate gel consist of ZnO NPs, the ZnO NPs enter 925 cm(cid:3)1 (C-C (]C-H intothecavityofthegelandwiththeincreasedconcentrationof out of plane vibrati”

  Chatterjee 等 - 2013 - Nanochannel morphology of polypyrrole-ZnO nanocomp DOI: 10.1039/c3ta12796f
• Carbohydrate confidence 1.0

  “In general, the ratio of the bands at 1047, 1022, and cm-1 1000 represents crystallineand amorphousstructuresin starch, whichrefer toamylose and amylopectin content and affect the starch digestibility.”

  Investigating the Impact of Dragon Fruit Peel Waste on Starch Digestibility, Pasting, and Thermal Properties of Flours Used in Asia DOI: 10.3390/foods11142031
• Acetate confidence 1.0

  “The C-O-H bending was observed at 1047 cm-1, and 1022 which corresponded to the crystalline and amorphous structures of starch, cm-1, respectively [22].”

  Formation of Intermediate Amylose Rice Starch–Lipid Complex Assisted by Ultrasonication DOI: 10.3390/foods11162430
• Carbohydrate confidence 1.0

  “In this research the phous starch by a FTIR band around and 1242cm-1 1047cm-1.”

  Characterization of Modified Tapioca Starch in Atmospheric Argon Plasma under Diverse Humidity by FTIR Spectroscopy DOI: 10.1088/0256-307X/30/1/018103
• confidence 1.0

  “4a-h may be attributed to the aryl groups along the polymer The FTIR spectra of all of the polymers, 4a-h, show the backbone.4 The maximum excitation wavelength of 4d is characteristic Si-O-C stretching frequencies at 1047, 1030, cm-1, resp”

  Jung 和 Park - 2011 - Melt Copolymerization Reactions between 1,3-Bis(di DOI: 10.5012/bkcs.2011.32.4.1303
• Carbohydrate confidence 1.0

  “In contrast, the mutant rice traits HyKOS21 and HyKOS22 are seem 1/1022cm 1)forHyKOS21 tobeinseparablefromtheoriginaltrait.Thepeakratioofthecrystallinity(1047cm shows significantly higher degree of order in the starch granule than the KDML1”

  Kongmon 等 - 2020 - Classification of ion-beam-induced traits in Thai DOI: 10.1016/j.nimb.2019.12.029
• confidence 1.0

  “contributes just little to decolorization when the activities of lacstituted aromatic compounds (617, 704 and The S O stretchingvibrationwasnoticedasasharppeakat1047cm-1.The case and veratryl alcohol oxidase are put into consideration.”

  Decolorization and biodegradation of Reactive Blue 13 by Proteus mirabilis LAG DOI: 10.1016/j.jhazmat.2010.08.035