What absorbs at 3389 cm⁻¹ in an FTIR spectrum?

クイックアンサー

A band near 3389 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 3389 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

• N h 信頼度 1.0

  “The origin cm-1 of the vibration bands is as follows: at 3389 due to the NH stretching vibrations, cm-1 cm-1 at 2936 due to a CH-stretching vibrations, at 620 due to CH out-of-plane bending vibration.”

  Synthesis and characterization thin films of conductive polymer (PANI) for optoelectronic device application DOI: 10.1063/1.4948838
• Amide 信頼度 1.0

  “Moderate exposure of the cm(cid:0) 1), O-H BRG peaks, displaying stretching (band A, 3389 amide I hydrophobic protein groups promoted the protein-oil interaction, cm(cid:0) 1), C¼O N-H (band B, stretching, 1648 amide II (band C, bending, co”

  Effect of different carbohydrates on the functional properties of black rice glutelin (BRG) modified by the maillard reaction DOI: 10.1016/j.jcs.2020.102979
• Hydroxyl (O-H) 信頼度 1.0

  “derived from castor oil, showed the -OH group bending band at 3389 The bands cm-1 at 2926, 2855, and 1739 were designated to asymmetric stretching and symmetric stretching of the CH group and C=O group, respectively.”

  Impact of Diisocyanates on Morphological and In Vitro Biological Efficacy of Eco-Friendly Castor-Oil-Based Water-Borne Polyurethane Dispersions DOI: 10.3390/polym14173701
• Hydrogen bond 信頼度 1.0

  “11.3 stretching (5) Si-O asymmetric 1154 1144 1130 1167 stretching (6) N-H(cid:5)(cid:5)(cid:5)N stretching 3341 3345 3351 3358 that there are no N-N and H-H bonds present in the (7) N-H stretching 3389 3396 3399 3403”

  Ay 和 Aydinli - 2004 - Comparative investigation of hydrogen bonding in s DOI: 10.1016/j.optmat.2003.12.004
• 信頼度 1.0

  “cm-1, XN-NIC XN-GA was also distinguished in and with a new band at 3352 and 3389 cm-1 respectively, and upshift of band at ca.”

  Budziak 等 - 2019 - Formation of Prenylated Chalcone Xanthohumol Cocry DOI: 10.3390/molecules24234245
• Hydroxyl (O-H) 信頼度 1.0

  “LLM confirmed rule peak-group candidate”

  Helen 等 - 2023 - Amelioration of ionic conductivity (303 K) with th DOI: 10.21203/rs.3.rs-1557220/v1
• N h 信頼度 1.0

  “Conversely to the PURs the PUR-M revealed the well-shaped NH band was observed as well, but its intensity relating to the "free" NH (3389 cm-1) in the PUR-M stretching band related to the moderate and strong hydrogen bonds present in the HS”

  The Influence of Calcium Glycerophosphate (GPCa) Modifier on Physicochemical, Mechanical, and Biological Performance of Polyurethanes Applicable as Biomaterials for Bone Tissue Scaffolds Fabrication DOI: 10.3390/polym9080329
• Carbonyl (C=O) 信頼度 1.0

  “The key feature absorption bands appeared at (1741-1748 which were cm-1 assigned to carbonyl (C=O) as well as a diminishing in the strength of the band at 3388.93 which was attribcm-1) uted to OH vibration, and the peak at (1365-1372 was at”

  Ferric perchlorate hydrate as a new catalyst for highly efficient esterification of cellulose at room temperature DOI: 10.1038/s41598-022-09669-w