What absorbs at 3319 cm⁻¹ in an FTIR spectrum?

クイックアンサー

A band near 3319 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 3319 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

  “[41-42] IR analysis of the whole plant extract of Gotu kola revealed that the presence of different functional groups ranging from O-H stretching, hydroxyl (3319.26 cm-1), C-H stretching, carbonyl (2921.96 cm-1), C=C”

  Kumar 等 - 2021 - Centella asiatica mediated facile green synthesis DOI: 10.1016/j.inoche.2021.108865
• Hydroxyl (O-H) 信頼度 1.0

  “were observed in the spectral ranges of 2614-4000 and 1465-1853 The FTIR spectra of fresh and cm-1, spoiled beetroot test samples showed wide and strong bands at 3319 and 1637 which corresponded to asymmetric and symmetric stretching vibrat”

  Analysis of Moisture Content in Beetroot using Fourier Transform Infrared Spectroscopy and by Principal Component Analysis DOI: 10.1038/s41598-018-26243-5
• N h 信頼度 1.0

  “The remaining band at 1599 cm-1 sites.20,33 acid The final peak at 3319 results from attributed to the asymmetric deformation of NH ((cid:228) as(NH 3)) 3 sites.20 as(NH 3) coordinated to Lewis acid (cid:238)”

  Pena 等 - 2004 - Identification of surface species on titania-suppo DOI: 10.1021/jp0313122
• Water (H2O) 信頼度 1.0

  “Pure distilled water showed a strong IR absorbance band at 3319.48 cm-1 stretching) and around 1636.63 (H-O-H bending).”

  Chemometric analysis of cow dung ash as an adsorbent for purifying biodiesel from waste cooking oil DOI: 10.1038/s41598-017-09881-z
• 信頼度 1.0

  “The medium peak at cm-1 3319 represents N-H stretching vibration that showed Significance of each individual process variables and overall the presence of amine group on the surface of biosorbent.”

  Biosorption of copper(II) onto spent biomass of Gelidiella acerosa (brown marine algae): optimization and kinetic studies DOI: 10.1007/s13201-019-1125-3
• Hydroxyl (O-H) 信頼度 1.0

  “The band at cm-1 3319 is attributed to the OH groups in lignin.”

  Chemical functional groups of extractives, cellulose and lignin extracted from native Leucaena leucocephala bark DOI: 10.1007/s00226-020-01258-2
• 信頼度 1.0

  “1c shows the IR A spectrum of 15DAN monomer, which displayed the characteristic peaks at 3416 and u t h 3319cm-1 and are ascribed to N-H stretching of the primary amino groups [32], these dual o”

  Olanipekun 等 - 2015 - Synthesis and characterization of reduced graphite DOI: 10.1016/j.saa.
• 信頼度 1.0

  “trum of the Por-BZ monomer, with the main characteristic signals being those for the heat of 163 J Compared with the typical thermal curing temperature of a Pa-type BZ oxazine ring (948 cm-1), C-O stretching (1222 cm-1), and N-H stretching”

  Zhang 等 - 2022 - Metal Complexes of the Porphyrin-Functionalized Po DOI: 10.3390/polym14030449