What absorbs at 887 cm⁻¹ in an FTIR spectrum?

クイックアンサー

A band near 887 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。

可能性のある材料

同じ文献プールがこのバンドと少なくとも1つの追加の特性ピークをサポートする場合にのみ、材料が表示されます。

スペクトルロジック

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 887 cm⁻¹ is usually not enough for material identification by itself.

実使用例

この種のクエリは、ポリマー識別、未知のプラスチックスクリーニング、QCトラブルシューティング、リサイクル材料の検証、および文献に基づいたピーク帰属のレビューで一般的です。

よくある間違い

• 少なくとも1～2つの支持ピークを確認せずに、1つの孤立したバンドを材料の証拠として扱うこと。
• 重複を無視: 複数の官能基が同じ波数付近に寄与することがあります。
• 添加剤、ブレンド、酸化、または汚染がスペクトルを歪める可能性がある場合に検証を省略すること。

検証アドバイス

曖昧さが残る場合は、特にブレンド、劣化サンプル、充填ポリマーについて、DSC、GC-MS、またはTGAで仮説を検証してください。

これらのアサインの根拠となる文献

• Alkene (C=C) 信頼度 1.0

  “A sharp peak near 887 is assigned to C=CH out of plane bending and is derived from 2”

  Chen 等 - 2019 - Baltic amber or Burmese amber FTIR studies on amb DOI: 10.1016/j.saa.2019.117270
• Alkyl C-H 信頼度 1.0

  “( C-H) δ δ ( 1457 1375 In the amber samples a wide absorption shoulder in the ( C-O) 887 2) δ 2852 CH ( δ cm-1, region between 1255 and 1156 related to C-O stretch1645”

  Differentiation between copal and amber by their structure and thermal behaviour DOI: 10.1007/s10973-023-12333-8
• Alkyl C-H 信頼度 1.0

  “This assignment is supported by the fact that the 838 be consumed to oxidize contaminating hydrocarbons at the TiO 2 cm-1 and 887 bands in Figure 5, assigned to the OO stretching surface, as indicated by the decreases in the CH-stretching b”

  Nakamura 等 - 2003 - In situ FTIR studies of primary intermediates of p DOI: 10.1021/ja029503q
• Hydroxyl (O-H) 信頼度 1.0

  “In addition to this, GP10, GP11 and GP13 also cm-1, showed new peaks around 887 which may be due to the deformation vibration of O-H, while the formation of hydrogen bonds in O-H may be due to the Maillard reaction or the glycosylation of g”

  Characterization and Application in Packaging Grease of Gelatin–Sodium Alginate Edible Films Cross-Linked by Pullulan DOI: 10.3390/polym14153199
• C c single bond 信頼度 1.0

  “1715, 1646 and which are attribcm-1 887 uted to C = H stretching, C-C stretching, and = CH out-ofare believed to be dependent on the degree of”

  Amber, beads and social interaction in the Late Prehistory of the Iberian Peninsula: an update DOI: 10.1007/s12520-017-0549-7
• Water (H2O) 信頼度 1.0

  “cm-1 cm-1, both DFO-B applications, the increased maxima at 1637 and 3342 assigned to as the intensive agarose peaks at 1370cm-1, 1037 cm-1, 928 cm-1, 887 cm-1 and 768 cm-1 were hydroxyls, are probably due to the water absorbed during the a”

  Desferrioxamine B: Investigating the Efficacy of Hydrogels and Ethanol Gels for Removing Akaganeite and Maghemite from Dry Wooden Substrates DOI: 10.3390/f14020247
• 信頼度 0.9

  “Text: 'stretching vibration bands of Mo-O-Mo are observed at 887, 830, 893, and 832'.”

  Lakhlifi 等 - 2022 - Purple nanometrics pigments based on cobalt-doped DOI: 10.1016/j.molstruc.2021.131458
• 信頼度 0.9

  “Explicit assignment: 'at 935 and 887 to' (bending vibrations from context)”

  Diamonds in the rough: identification of naphthenic acids in oil sands waste and degraded crude oils DOI: 10.1080/14786419.2018.1428599