What absorbs at 768 cm⁻¹ in an FTIR spectrum?

クイックアンサー

A band near 768 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。

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 768 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

• Phosphate (PO4) 信頼度 1.0

  “cm-1 (ii) The peak at 768 is assigned to symmetric stretching vibrations of the P-O-P rings and possible sharing At high dose of irradiation, most of the IR spectral bands of (AlO show distinct decrease in their intensities and a prominent”

  Photoluminescence, optical and structural properties of Pr3+-doped fluorophosphate glasses and their induced defects by gamma irradiation DOI: 10.1007/s10854-018-9120-2
• Aromatic ring 信頼度 1.0

  “The band at 768 was 3.18% regression attributed to the ortho-disubstituted phenyl group.”

  Attenuated total reflection‐Fourier transform infrared spectroscopy (ATR‐FTIR) for quantification of piroxicam in tablet dosage from as a green analytical method DOI: 10.1002/vjch.202000049
• 信頼度 1.0

  “Explicit assignment in text”

  Novel Copper(II) Complexes with N4,S-Diallylisothiosemicarbazones as Potential Antibacterial/Anticancer Drugs DOI: 10.3390/inorganics11050195
• Hydroxyl (O-H) 信頼度 1.0

  “The around 1600 cm-1 H-O-H bending were assigned to Si-Si and The former could be attributed to the bands at ν= 768 and 728 Al-Si stretching vibrations, respectively.”

  Nojiri 等 - 2013 - Structural change of alkali feldspar by ball milli DOI: 10.2465/jmps.121122
• Water (H2O) 信頼度 1.0

  “cm-1 cm-1, both DFO-B applications, the increased maxima at 1637 and 3342 assigned to as the intensive agarose peaks at 1370cm-1, 1037 cm-1, 928 cm-1, 887 cm-1 and 768 cm-1 were hydroxyls, are probably due to the water absorbed during the a”

  Desferrioxamine B: Investigating the Efficacy of Hydrogels and Ethanol Gels for Removing Akaganeite and Maghemite from Dry Wooden Substrates DOI: 10.3390/f14020247
• 信頼度 1.0

  “cm-1 cm-1 parameter in this study, we attempted to estimate those 768 (C-Cl stretch = alkyl halides) and 646 (- C:C-H: phytochemicals quantitatively in MEAIL.”

  Identification of food preservative, stress relief compounds by GC–MS and HR-LC/Q-TOF/MS; evaluation of antioxidant activity of Acalypha indica leaves methanolic extract (in vitro) and polyphenolic fraction (in vivo) DOI: 10.1007/s13197-017-2590-z)
• Metal oxygen 信頼度 1.0

  “In Figure 7, the strong peak at 768 cm-1 is due to the W-O bond in the tetrahedral.”

  Electro-Oxidation of Metal Oxide-Fabricated Graphitic Carbon Nitride for Hydrogen Production via Water Splitting DOI: 10.3390/coatings12050548
• Alkyl C-H 信頼度 0.9

  “Text: '768 cm-1 for C-H bending'.”

  Bromo-substituted blocked hexamethylene diisocyanate adduct: synthesis, characterization and applica DOI: 10.1080/10601325.2020.1845569