What absorbs at 1484 cm⁻¹ in an FTIR spectrum?

Quick answer

A band near 1484 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.

可能性のある官能基アサイン

ランキングは蓄積された文献証拠を反映しており、単一の権威あるルールではありません。常にサンプルのコンテキストと照合して確認してください。

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 1484 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.

これらのアサインの根拠となる文献

• Alkene (C=C) 信頼度 1.0

  “Band 3 2 cm-1 at 1484 could be ascribed to the C=C bonds.”

  Synthesis, Optical, Chemical and Thermal Characterizations of PMMA-PS/CeO2 Nanoparticles Thin Film DOI: 10.3390/polym13071158
• Ring structure 信頼度 1.0

  “[43] 1484 C8-H coupled with a ring vibration of guanine 1484 ν(C=C)-diagnostic for the presence of a carotenoid structure, [44]”

  Ghassemi 等 - 2021 - Diagnosis of normal and malignant human gastric ti DOI: 10.1016/j.molstruc.2020.129493
• Amide 信頼度 1.0

  “a cm-1 The bands at 1,700-1,600 are mostly attributed to the 1484 a amide I vibrations (the CO stretches of backbone amides), 14811476 b”

  Takano 等 - 2008 - Herbicide effect on the hydrogen-bonding interacti DOI: 10.1007/s11120-008-9302-5
• Alkyl C-H 信頼度 1.0

  “The changes in cm-1 cm-1 changes in the band between 1484 and 1410 could have been due to aliphatic the band between 1484 cm-1 and 1410 cm-1 could have been due to aliphatic C-H deforC-H deformation, C-O stretching, and the O-H deformation”

  Autopsy of Used Reverse Osmosis Membranes from the Largest Seawater Desalination Plant in Oman DOI: 10.3390/membranes12070671
• Ring structure 信頼度 1.0

  “adenosine and guanosine internal ring vibration gives rise to a peak at 1484 and at 1337 cm-1”

  FTIR Spectroscopy to Reveal Lipid and Protein Changes Induced on Sperm by Capacitation: Bases for an Improvement of Sample Selection in ART DOI: 10.3390/ijms21228659
• 信頼度 1.0

  “Additionally, the peaks at 1484 and 1085 cm characteristic of the Raman spectrum of malachite, is consistent with the + CR M mixture up to 40% of M.”

  Spectroscopic study of mixtures of green copper pigments in fresh and aged model samples. Case studies on masterpieces from the Spanish Golden Age DOI: 10.1016/j.culher.2022.12.004
• 信頼度 1.0

  “medium peak at 769 a strong peak at 947 as well as a weak peak at 1484 The cm-1 cm-1 peaks at ~520 and a broad band at 550-280 as well as the infrared absorption at cm-1 1484 were due to the infrared absorption by the Ca-O bond.”

  Zaid 等 - 2017 - Effect of Sintering on Crystallization and Structu DOI: 10.2298/SOS1704409Z
• 信頼度 0.9

  “Sharp PS-derived peak at 1484.”

  Nanomechanical IR spectroscopy for fast analysis of liquid-dispersed engineered nanomaterials DOI: 10.1016/j.snb.2016.04.002