What absorbs at 949 cm⁻¹ in an FTIR spectrum?

クイックアンサー

A band near 949 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 949 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

• Silicon (Si) 信頼度 1.0

  “The weak bands at 900 cm-1 and 949 cm-1 are possibly atattributed to the symmetric stretching vibrations Si-OH and Si-O-Si in amorphous silica.”

  Biosynthesized Silica Nanosuspension as Thermal Fluid in Parabolic Solar Panels DOI: 10.3390/e23020142
• Alkene (C=C) 信頼度 1.0

  “stretching (1066 -CH-O-CHstretching (1003 and =C-H bending (949 cm-1) and = C-H bending (949 cm-1).”

  Substantial Proton Ion Conduction in Methylcellulose/Pectin/Ammonium Chloride Based Solid Nanocomposite Polymer Electrolytes: Effect of ZnO Nanofiller DOI: 10.3390/membranes12070706
• C c single bond 信頼度 1.0

  “Furthermore, the cm-1 band at 1081 and 1025 is assigned for the stretching of C-O-C group, however, C-C-H stretching, C-O-C glycosidic linkage (ring breathing), and -C-C (C-C-O ring) could be associated with the peak of 949, 887, and 814 cm”

  Faried 等 - 2017 - Green Synthesis of Silver Nanoparticles in Biopoly DOI: 10.1063/1.4968377
• Hydroxyl (O-H) 信頼度 1.0

  “2021, 68, 945-954 949 cm-1 at 1639.76 may be attributed to the bending vibration modes of O-H groups of these adsorbed H 2O molecules.49 Further, three small bands at 2862.62, 2928.94, cm-1 may be ascribed to the asymmetric and and 2959.97”

  Shojaei 和 Komsari - 2021 - Synthesis of CuO by Electrospinning Method for Sen DOI: 10.17344/acsi.2021.6914
• Alkyl C-H 信頼度 1.0

  “The band at 1470 cm-1 ones at 949 cm-1 cm-1 is representative of methylene deformation vibration and that at 2069 of a thiocyanate group.”

  Thermocatalytic Pyrolysis of Exhausted Arthrospira platensis Biomass after Protein or Lipid Recovery DOI: 10.3390/en13205246
• Hydroxyl (O-H) 信頼度 1.0

  “1619 stretching stretching 949 W-OH stretching O-H (%) O-W-O w2”

  Surakasi 等 - 2022 - Methylene Blue Dye Photodegradation during Synthes DOI: 10.1155/2022/2882048
• Silicon (Si) 信頼度 1.0

  “These 949cm-1 is assigned to the vibration of Si-OH.”

  Van-Phuc Dinh 等 - 2021 - Fabrication of SiO2PEGDA Inverse Opal Photonic Cr DOI: 10.1155/2021/6613154
• Acetate 信頼度 1.0

  “After epichlorohydrin-activation (including PEGDE cm-1 grafting), the spectrum of Cl-A LPEI shows a series of peaks at 1080 (C-O and C-C cm-1 cm-1 cm-1 stretching), 1055 (C-N stretching), 1001 (C-O-C stretching), 949 (epoxide cm-1 asymmetri”

  Synthesis of a New Phosphonate-Based Sorbent and Characterization of Its Interactions with Lanthanum (III) and Terbium (III) DOI: 10.3390/polym13091513