What absorbs at 839 cm⁻¹ in an FTIR spectrum?

クイックアンサー

A band near 839 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 839 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

• Metal oxygen 信頼度 1.0

  “cm-1), cm-1), cm-1 (*1,037 (*913 AlAlOH AlMgOH *1,614 The shift of peak at in sample II to higher cm-1), (*839 deformation vibrations of Al-O-Si groups frequency is due to the existence of 2,4-DMP in protonated cm-1), cm-1) (*518 (*449 and”

  Janik 等 - 2013 - Effect of different dimethylphenols on the interac DOI: 10.1007/s10973-013-2990-x
• Alkyl C-H 信頼度 1.0

  “Vials were subat 1524.26 cm-1, 1308.30 cm-1, and at 839.48 cm-1 was jected to mechanical shaking at 400 rpm for 24 h observed due to C-H stretching, C-C stretching and”

  Batool 等 - 2019 - USE OF GLUTARIC ACID TO IMPROVE THE SOLUBILITY AND DOI: 10.32383/appdr/94246
• C c single bond 信頼度 1.0

  “The fingerprint region of the IR absorption spectra (Figure 3a,b) reveals typical absorption bands The fingerprint region of the IR absorption spectra (Figure 3a,b) reveals typical absorption bands cm-1 of PVA, occurring at 839, 917 and 108”

  Croitoru 等 - 2020 - Physically Crosslinked Poly (Vinyl Alcohol)Kappa- DOI: 10.3390/polym12030560
• Alkyl C-H 信頼度 1.0

  “LLM confirmed rule peak-group candidate”

  Elhosiny Ali 等 - 2022 - Microstructure Study and LinearNonlinear Optical DOI: 10.3390/polym14091741
• C c single bond 信頼度 1.0

  “(cm-1) (cm-1) assignment observed wavelength for PVA observed wavelength for ZnS-PVA reference OH stretching 3280 3290 [20,21] CH2 asymmetric stretching 2917 2923 [20,21] C=O carbonyl stretching 1690 1718 [20-22] CH2 bending 1425 1430 [20,2”

  Structural, optical, opto-thermal and thermal properties of ZnS–PVA nanofluids synthesized through a radiolytic approach DOI: 10.3762/bjnano.6.55
• 信頼度 1.0

  “Al-O4]5vibration of [AlO 28-29 - 791 778 770 772 Symmetric stretching 839 837 837 835 837 Stretching Si-O-Al vibration 29-30 Raman shift (cm-1)”

  Kim 等 - 2013 - Viscous Behavior of Alumina Rich Calcium-Silicate DOI: 10.2355/isijinternational.53.170
• Acetate 信頼度 1.0

  “β γ, δ ε Ar-O-), 1.80-1.75 (m, 4H, to Ar-O-), 1.48-1.38 (m, 10H, and to Ar-O-) 1,10-Bis[4-(pyreneiminomethylidene)-phenoxy]-decane cm-1): ν, FTIR (KBr, 3037 (=C-H stretch of the aromatic rings), 2922, 2850 (C-H stretch of aliphatic chains),”

  Mesomorphic Behavior of Symmetric Azomethine Dimers Containing Different Chromophore Groups DOI: 10.3390/molecules26082183
• Ring structure 信頼度 1.0

  “735-657cm-1isassignedtoamideorCH 2rockingband[18],839cm-1 cm-1 water,2890 is related tothe asymmetrically stretching vibration cm-1 C\\H C\\C of in a pyranoid ring, and the band at 3332 is attributed to the vibrations occurred due to ring b”

  Polyethersulfone membrane embedded with amine functionalized microcrystalline cellulose DOI: 10.1016/j.ijbiomac.2020.09.017