What absorbs at 663 cm⁻¹ in an FTIR spectrum?

クイックアンサー

A band near 663 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 663 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

• Thiol 信頼度 1.0

  “The second silicate bands are 4 cm-1 in C-S-H broadly characterized as O-Si-O deformation or bending modes, which occur near 451 470cm-1 cm-1 667cm-1 and in C-A-S-H and the band 663 or is due to Si-O-Si bending vibrations.”

  He 等 - 2011 - Morphology and Structure of Aluminum Substituted C DOI: 10.4028/www.scientific.net/AMR.287-290.1193
• 信頼度 1.0

  “Peak at 663 Tensile tests were performed according to ASTM D638 corresponds to the C-Cl stretching in PVC chains.”

  Ibrahim 等 - 2011 - A study of poly vinyl chloridepoly(butylene adipa DOI: 10.1007/s10965-010-9486-1
• Carbon bromine 信頼度 1.0

  “The intense bands situated at about 663 and 1025cm-1 of wavelength were assigned to the stretching vibrational movement of C-Br and”

  Jing 等 - 2019 - Biosynthesis of copper oxide nanoparticles and the DOI: 10.1016/j.jphotobiol.2019.111557
• Amide 信頼度 1.0

  “pneumonia were observed by SEM based on a method reported 663cm-1 C-N C-Br ∼105CFU/mL are due to and stretching vibrational motions.”

  Biologically synthesized copper oxide nanoparticles enhanced intracellular damage in ciprofloxacin resistant ESBL producing bacteria DOI: 10.1016/j.micpath.2018.12.017
• Hydroxyl (O-H) 信頼度 1.0

  “cm-1 Analysis of deuterated samples [50] shows that the relatively sharp peak at 663 is due to the O-H Analysis of deuterated samples [50] shows that the relatively sharp peak at 663 cm-1 is due to the Olibration (see inset in Figure 4).”

  Baldassarre 等 - 2020 - Crystal Chemistry and Luminescence Properties of E DOI: 10.3390/cryst10040250
• 信頼度 1.0

  “The strong bonds between 981.1 cm-1 and 662.7 cm-1 stretching with halogen groups.”

  Synthesis and Characterization of Sulfur Nanoparticles of Citrus limon Extract Embedded in Nanohydrogel Formulation: In Vitro and In Vivo Studies DOI: 10.3390/gels9040284
• 信頼度 1.0

  “is triuoroacetate electrostatic interaction of lanthanum and triarticle cm-1 Si-O-Si La-O-Si 663 assigned to & bond vibrations, chloroacetate with the silica support material, which converts Article.”

  Silica supported lanthanum trifluoroacetate and trichloroacetate as an efficient and reusable water compatible Lewis acid catalyst for synthesis of 2,4,5-triarylimidazoles via a solvent-free green approach DOI: 10.1039/d2ra07021a
• Hydroxyl (O-H) 信頼度 1.0

  “Analysis of deuterated samples [56] shows cm-1 that the relatively sharp peak at 663 is due to the O-H libration.”

  Paterlini 等 - 2020 - Characterization and Luminescence of Eu3+- and Gd3 DOI: 10.3390/cryst10090806