What absorbs at 849 cm⁻¹ in an FTIR spectrum?

クイックアンサー

A band near 849 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 849 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

• Hydroxyl (O-H) 信頼度 1.0

  “Impedance can provide valuable information on cm-1 observed hydroxyl group peaks at 849 as shown in charge transport phenomena in conducting polymer, elec-”

  Structural and Electronic Property Study of Polypyrrole Nanowires Synthesized by Electrochemical Method DOI: 10.1166/nnl.2013.1514
• Silicon-oxygen (Si-O) 信頼度 1.0

  “cm-1 cm-1 of SOC and 821 of observed with the band at 849 POXC, representing quartz-like Si-O (Margenot et al., 2020).”

  Identifying the fingerprint of permanganate oxidizable carbon as a measure of labile soil organic carbon using Fourier transform mid‐infrared photoacoustic spectroscopy DOI: 10.1111/ejss.13085
• Alkyl C-H 信頼度 1.0

  “CH rocking and wagging are observed at 3 2 -1 849cm-1.The 752 cm and spectrum depicts shift in the wavelength of the vibration bands and also an extra peak at 2355cm-1 .”

  Naik 等 - 2019 - Optical and Electrical Properties of TCNQ Doped PM DOI: 10.1063/1.5100466
• Acetate 信頼度 1.0

  “The absorption band near 849 peak C-O-C β (1⟶4)-glycosidic corresponds to symmetric stretching of linkage.”

  Influence of size classifications on the crystallinity index of Albizia gummifera cellulose DOI: 10.1016/j.heliyon.2022.e12019
• Alkyl C-H 信頼度 1.0

  “2 Out-of-plane bending vibration of 848.849 C-H in the -CH=CHgroup of 836.955 840.812 blue shift of peak”

  Chen 等 - 2013 - Fourier Transform Infrared Spectral Analysis of Po DOI: 10.1155/2013/937284
• Silicon nitrogen 信頼度 1.0

  “cm-1, cm-1, cm-1, 912 and 961 which can be fitted by three symmetric Gaussian bands at 849 represent absorption states of the Si-N stretching mode [52-54].”

  Hermann 等 - 2014 - Characterization of semiconductor materials using DOI: 10.1364/OE.22.017948
• Acetate 信頼度 1.0

  “stretching), (C-H bending), 1261 and (C-O 1100-1000cm(cid:3)1 stretching), (C-O stretching in C-O-H groups and 849cm(cid:3)1 observed.20,21 COC groups) and (C-H rocking mode) were”

  DSC-FTIR microspectroscopy used to investigate the heat-induced intramolecular cyclic anhydride formation between Eudragit E and PVA copolymer DOI: 10.1038/pj.2011.15;
• Acetate 信頼度 1.0

  “C=O to P-O bending (crystalline) and P-O bending (amorphous), associated with C-O (Stretch) and (Stretch) stretching cm-1 cm-1 respectively, presence of C-O stretching at 849 band modes, respectively, and the broad band at about 3710 show t”

  Vyas 等 - 2016 - Effect of nickel oxide substitution on bioactivity DOI: 10.1007/s12034-016-1242-7