What absorbs at 1229 cm⁻¹ in an FTIR spectrum?

クイックアンサー

A band near 1229 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 1229 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

• Hydroxyl (O-H) 信頼度 1.0

  “of peak changes in wavenumber for alginate-GA in BBPEs system (cm-1) Assignments (functional group) Wavenumber GA ALGAALGAALGAALGAALGAALGAALGA0 1 2 3 4 5 6 - C-O-C 1025 1030 1031 1035 1035 1080 1081 stretching - - - - - - - 1074 C-O stretch”

  Enhancing proton conductivity of sodium alginate doped with glycolic acid in bio-based polymer electrolytes system DOI: 10.1007/s10965-020-02142-0
• Acetate 信頼度 1.0

  “Meanwhile, the peaks at 1229 and 1070 are assigned to C-O and C-O-C stretching vibrations cm-1 from urethane carbonyl.”

  Preparation of one-shot and two-shot method of semi-rigid polyurethane film based on functionalized liquid natural rubber DOI: 10.1063/1.5047200
• Acetate 信頼度 1.0

  “The bands at 1229 and cm-1 samples was examined immediately after the sam1062 are assigned to C-O and C-O-C stretching ples were removed from the media before they were vibrations from urethane carbonyl [9].”

  The behavior of semi-rigid polyurethane film based on functionalized rubber by one-shot and two-shot method preparation DOI: 10.1007/s10853-018-2578-8
• Carboxyl (COOH) 信頼度 1.0

  “The degree of stretching vibration mode of the carboxylic group (C-O) corresponding to the peaks at 1229, 1217, 1215, 1073, cm-1 1071 and 1068 of all as-burnt BCZT powders decreased with increasing pH value.”

  Influence of pH values on the surface and properties of BCZT nanopowders synthesized via sol-gel auto-combustion method DOI: 10.1016/j.surfcoat.2016.03.091
• C-O single bond 信頼度 1.0

  “LLM confirmed rule peak-group candidate”

  Graphene oxide-TiO2 and reduced graphene oxide-TiO2 nanocomposites: Insight in charge-carrier lifetime measurements DOI: 10.1016/j.cattod.2016.11.008
• 信頼度 1.0

  “cm(cid:0) C-- 1, 8400 automatic nitrogen determination apparatus (FOSS, Hiller, which correspond to the O stretching vibra1229, and 1059 C(cid:0) (cid:0) (cid:0) C(cid:0) O(cid:0) Denmark) in the Kjeldahl mode.”

  Preparation of pH-sensitive polylactic acid-naringin coaxial electrospun fiber membranes for maintaining and monitoring salmon freshness DOI: 10.1016/j.ijbiomac.2021.08.087
• Acetate 信頼度 1.0

  “hydrogen bonded hydroxyl groups (3600-3200 cm-1 The standard has a very strong band at 1737 that is assigned to C=O cm-1 that corresponds to in-plane stretching of COOH group and a band at 1229 bending vibrations of OH groups from COOH (Fig”

  Miletic 等 - 2020 - Oxidized humic acids from the soil of heat power p DOI: 10.2298/JSC190726099M
• Amide 信頼度 1.0

  “LLM confirmed rule peak-group candidate”

  Direct Quantification of Drug Loading Content in Polymeric Nanoparticles by Infrared Spectroscopy DOI: 10.3390/pharmaceutics12100912