What absorbs at 449 cm⁻¹ in an FTIR spectrum?
A band near 449 cm⁻¹ can point to several functional groups. Below are the most likely assignments, ranked by how much published evidence supports each — every one traceable to literature (DOI) and cross-validated against our 130,000+ reference spectra and knowledge graph.
Backed by 8 cited sources
クイックアンサー
A band near 449 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
| 官能基 | 裏付け事実 | 引用元 | 最高信頼度 |
|---|---|---|---|
| Metal oxygen | 4 | 4 | 1.0 |
| N h | 2 | 2 | 1.0 |
| Amino acid | 1 | 1 | 1.0 |
| Secondary amine | 1 | 1 | 1.0 |
| C n single bond | 1 | 1 | 1.0 |
| Amide | 1 | 1 | 1.0 |
| Hydroxyl (O-H) | 1 | 1 | 1.0 |
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。
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 449 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
-
信頼度 1.0
“The two strong peaks 449 and 552 corresponds to O-Fe-O bending vibrations and Fe-O stretching vibrations, present in the octahedral FeO group which is 6 consistent with that reported by Liu et al [42].”
Investigation of Structural, Optical, Dielectric and Magnetic studies of Mn substituted BiFeO3 Multiferroics DOI: 10.1016/j.ceramint.2017.07.088 -
信頼度 1.0
“1500 tional mode at 1609 Both the frequency and the 448 420 reveal the loss of aromatic character at the benzenoid positive character of this clear-cut band agree with the 449 421 rings and their transformation into quinoid centers as disap”
Benyoucef 等 - 2005 - Synthesis and in situ MRS characterization of cond DOI: 10.1016/j.eurpolymj.2004.10.047 -
信頼度 1.0
“Therefore, infrared spectra in the region of 4000-2750 showed 448 cm-1 diclofenac bands at 3388 and 2357 assigned to free and bound N-H stretching, 449 (N-H....O) respectively, the latter through intramolecular hydrogen bonds (Kovala-Demert”
Franca 等 - 2020 - Monitoring diclofenac adsorption by organophilic a DOI: 10.1016/j.envpol.2013.04.012 -
Hydroxyl (O-H) 信頼度 1.0
“Fritsch et al.: OH stretching vibrations in serpentines 449”
Fritsch 等 - 2021 - Structural, textural, and chemical controls on the DOI: 10.5194/ejm-33-447-2021 -
Metal oxygen 信頼度 1.0
“The absorption band at 449 cm-1 proves that Zn-O was formed sucsponds to the C-N stretch of amino acids [34].”
Minhas 等 - 2023 - Green Synthesis of Zinc Oxide Nanoparticles Using DOI: 10.3390/catal13030549 -
Metal oxygen 信頼度 1.0
“3399 and 3615 Al-O bonds had a symmetric vibration peak cm-1, at 449, 517, and 1080 while Si-O bonds showed symmetric Figure 6.”
Sola 和 Ozyazgan - 2019 - Analyses of cement mortars containing reclaimed as DOI: 10.14256/JCE.1607.2016 -
信頼度 0.95
“Explicit: 'Bands at 537 and 449 cm-1 were also observed and are attributed to the tetrahedral sites'”
da Silva 等 - 2020 - From Disposal to Reuse Production of Sustainable DOI: 10.3390/su122310159 -
Metal oxygen 信頼度 0.7
“Text: 'A large descending spectrum is related to Zn-O' near peak 449 cm-1.”
Facile fabrication of Zn/Zn5(OH)8Cl2·H2O flower-like nanostructure on the surface of Zn coated with poly (N-methyl pyrrole) DOI: 10.1016/j.apsusc.2011.07.046
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