What absorbs at 1290 cm⁻¹ in an FTIR spectrum?

クイックアンサー

A band near 1290 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 1290 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

• Alkyl C-H 信頼度 1.0

  “-0(cid:5)6 movement of the anions was near at V, the two peaks cm-1 cm-1 The peaks at 1290 and 1025 were assigned were not symmetrical well due to the influence of backto in-plane C-H deformation and in-plane C-H stretchkinetics.27 From gro”

  Structural and Electronic Property Study of Polypyrrole Nanowires Synthesized by Electrochemical Method DOI: 10.1166/nnl.2013.1514
• Aromatic ring 信頼度 1.0

  “1543 C C stretching in quinoid rings C stretching in quinoid rings 1290 C N stretching 1538 C 1447 C C stretching in benzoid rings 2996”

  Dey Sadhu 等 - 2020 - Preparation and characterization of polyanilinea DOI: 10.1002/pc.25738
• Nitrate 信頼度 1.0

  “The peak at 1290 of NH The absence of any peaks for water is a distinguishing feature 3 indicative of monodentate nitrate species, disappears above 473 in this case that supports our mass spectroscopy data (not shown) cm-1,”

  Pena 等 - 2004 - Identification of surface species on titania-suppo DOI: 10.1021/jp0313122
• Ester 信頼度 1.0

  “The degradation of the PS:PLA composites is reflected by a considerable decrease in the intensity of cm21) and -CH the ester group absorption band (1290 cm21) with simultaneous appearabsorption band (3000”

  Shimpi 等 - 2014 - Preparation, Characterization, and Biodegradation DOI: 10.1002/pc.22658
• Hydroxyl (O-H) 信頼度 1.0

  “The PtNPs/GNs/PG electrode showed bands at 988 cm-1, 1290 cm-1, 1632 cm-1 and 3222 cm-1, which confirms O-H bonding, C-N stretching and N-H, as well as CThebareelectrodestudiedbySEMshowsnodeposition(Figure6A)ontoPGE,whereas cm-1, which was”

  An Amperometric Acetylcholine Biosensor Based on Co-Immobilization of Enzyme Nanoparticles onto Nanocomposite DOI: 10.3390/bios13030386
• Amide 信頼度 1.0

  “C-N The vibrations at 1462 and 1290 cm-1 are generated because of stretching and C-Cl bond is responsible for the bands at 605 and 633 cm-1 bending vibrations, while the (M-O) Er2O3 has a metal-oxygen bond shown at 557 cm-1 [29].”

  New Hybrid PVC/PVP Polymer Blend Modified with Er2O3 Nanoparticles for Optoelectronic Applications DOI: 10.3390/polym15030684
• Amide 信頼度 1.0

  “cm-1 [ν(N-H)], to the stretching vibration the band at 1637 cm-1 CO [ν(CO)], stretching vibration the band at 1569 to the quinonoid ring-stretching vibration, the bands at 1505 cm-1 to the benzenoid ring-stretching vibrations, the and 149”

  Blaha 等 - 2019 - Role of p-Benzoquinone in the Synthesis of a Condu DOI: 10.1021/acsomega.9b00542
• Hydroxyl (O-H) 信頼度 1.0

  “cm(cid:1)1 cm(cid:1)1 cm(cid:1)1 The peak from 1290 of 3000 to 3500 to 1120 is due to the presence is indicative of hydroxyl group present -C-O -C Ciprofloxacin of symmetric and antisymmetric stretching of = O.”

  Poly Lactic-Co-Glycolic Acid Nano-Carriers for Encapsulation and Controlled Release of Hydrophobic Drug to Enhance the Bioavailability and Antimicrobial Properties DOI: 10.1177/15593258231152117