What absorbs at 1142 cm⁻¹ in an FTIR spectrum?

クイックアンサー

A band near 1142 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

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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 1142 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

• Acetate 信頼度 1.0

  “42 43 cm-1 In the spectrum of PMMA, there is a distinct absorption band at 1142 which is due to O-CH 3 44”

  Ataei 等 - 2020 - Electrosprayed PMMA microcapsules containing green DOI: 10.1088/1361-665X/ab9754
• Amide 信頼度 1.0

  “II), and 1328 (amide III) The absorption peaks at 1142 (antisymmetric elongation of II), and 1328 (amide III) cm-1.”

  Chitosan/PVA Based Membranes Processed by Gamma Radiation as Scaffolding Materials for Skin Regeneration DOI: 10.3390/membranes11080561
• 信頼度 1.0

  “Explicit assignment: 'C-N stretching vibrations are shown at 1286 and 1142 cm-1'.”

  Liao LePing 等 - 2011 - Preparation and characterization of microcapsule c DOI: 10.1007/s11434-010-4133-0
• S eq o 信頼度 1.0

  “The consensus is that 1240 and 1142 cm-1 bands arise from νS=O vibrations in chelating cm-1 ν consensus is that 1240 and 1142 bands arise from vibrations in chelating (bridging) bidentate”

  Acidity-Reactivity Relationships in Catalytic Esterification over Ammonium Sulfate-Derived Sulfated Zirconia DOI: 10.3390/catal7070204
• 信頼度 1.0

  “cm-1 cm-1 1591.8 (N-H bending), 1322.5 (R-SO sym2 (a) (c) caffeine physical mixtures at drug/coformer ratios: 1:1, 2:1, cm-1 metric stretching), 1142.1 (S-O stretching) and (e) 1:2, furosemide-caffeine co-crystals at drug/coformer ratios: c”

  Principal component and cluster analyses as supporting tools for co-crystals detection DOI: 10.1007/s10973-017-6436-8
• 信頼度 1.0

  “The intensity of these bands disappear and bands at 880 and 1142 cm-1 show up which corresponds to Fe-S specific the bands is not very high, but their position is clear.”

  Synthesis and Characterization of Cu2FeSnS4–Cu2MnSnS4 Solid Solution Microspheres DOI: 10.3390/ma13194440
• Phosphate (PO4) 信頼度 1.0

  “It PDBA improved the thermal stability of PET/PDBA and reduced the decomposition rate of cm-1 should be noted that a new absorbance peak of P-O-C appeared at 1142 cm-1 in material.”

  A High-Phosphorus-Content Polyphosphonate with Combined Phosphorus Structures for Flame Retardant PET DOI: 10.3390/polym15071713
• Hydrogen bond 信頼度 1.0

  “Nonetheless, the band at 1142 sample gel fraction (GF) related to the formation of PVA crystallites (intraand intermolecular hydrogen bonding between the chains W”

  dos Santos 等 - 2020 - Layered cryogels laden with Brazilian honey intend DOI: 10.1590/0104-1428.06820