What absorbs at 1759 cm⁻¹ in an FTIR spectrum?

クイックアンサー

A band near 1759 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 1759 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

• Carbonyl (C=O) 信頼度 1.0

  “¼ structure, an orthorhombic unit cell is proposed (a 10.31 Å, cm(cid:3)1, For PLLA, an ester carbonyl band appears at around 1759 b¼18.21Åandc¼9.00Å)containingsixchains.ThePLLAcomplex cm(cid:3)1.”

  Influence of hydrolytic degradation on the surface properties of poly-5d/95l-lactide resorbable bone plates DOI: 10.1016/j.polymdegradstab.2011.04.020
• Alkyl C-H 信頼度 1.0

  “The OMMT, which permits easy absorption of water into the cm21 characteristic peaks at 2997, 2946, and 1877 are for polymer chains and activates the rate of degradation with CAO cm21 are for CH stretching, while 1759 and 1456 fungal growth”

  Shimpi 等 - 2014 - Preparation, Characterization, and Biodegradation DOI: 10.1002/pc.22658
• Ester 信頼度 1.0

  “1115 cm-1 cm-1 (C=N (symmetric stretching P-O-C), 1034 (collagen), 1528 guanine, adenine, cytosine) and cm-1 (C=O 1759 ester group vibration of triglycerides).”

  New approach to investigate Common Variable Immunodeficiency patients using spectrochemical analysis of blood DOI: 10.1038/s41598-019-43196-5
• Carboxyl (COOH) 信頼度 1.0

  “FTIR spectra showed the grafting of AA and MAA monomers onto LSH due to the lack of their carboxylic acid carbonyls bands at 1759 and”

  Application of Vibrational Spectroscopic Techniques in the Study of the Natural Polysaccharides and Their Cross-Linking Process DOI: 10.3390/ijms24032630
• Acetate 信頼度 1.0

  “at position 1759 This band corresponds to the stretching vibrations of the C=O groups originating from”

  The sex impact on the technological and chemical characteristics of meat derived from the Polish native chicken breed DOI: 10.1038/s41598-023-33430-6
• Acetate 信頼度 1.0

  “C-H stretching (alkyl) 2993 2982 C=O stretching (-COOester group) 1759 1745”

  Li 等 - 2020 - The Impact of Reactive Ionic Liquids Addition on t DOI: 10.3390/polym12091958
• Acetate 信頼度 1.0

  “A peak at 1759 stems from C=O stretching dominantly governed by the core states in the conjugated π”

  Structural, optical, and bioimaging characterization of carbon quantum dots solvothermally synthesized from o-phenylenediamine DOI: 10.3762/bjnano.14.17
• Carbonyl (C=O) 信頼度 1.0

  “Furthermore, another characteristic band is the carbonyl of polymers, which is presented for PBAT and PLA at 1710 cm-1 and 1759 cm-1, respectively.”

  Poly(butylene adipate-co-terephthalate)/Poly(lactic acid) Polymeric Blends Electrospun with TiO2-R/Fe3O4 for Pollutant Photodegradation DOI: 10.3390/polym15030762