What absorbs at 667 cm⁻¹ in an FTIR spectrum?
A band near 667 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 667 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 |
|---|---|---|---|
| Carbon dioxide | 5 | 5 | 1.0 |
| Hydroxyl (O-H) | 5 | 5 | 1.0 |
| Sulfate (SO4) | 3 | 3 | 1.0 |
| Alkyl C-H | 2 | 2 | 1.0 |
| Silicon-oxygen (Si-O) | 2 | 2 | 1.0 |
| Silicon (Si) | 2 | 2 | 1.0 |
| Water (H2O) | 2 | 2 | 1.0 |
| Metal oxygen | 2 | 2 | 1.0 |
| C-S single bond | 2 | 2 | 1.0 |
| Amino acid | 1 | 1 | 1.0 |
| N h | 1 | 1 | 1.0 |
| Aromatic ring | 1 | 1 | 1.0 |
| Nucleic acid | 1 | 1 | 1.0 |
| Ring structure | 1 | 1 | 1.0 |
| Hydrogen bond | 1 | 1 | 1.0 |
| Methacrylate | 1 | 1 | 1.0 |
| Ketone | 1 | 1 | 1.0 |
| Ester | 1 | 1 | 1.0 |
| Carboxyl (COOH) | 1 | 1 | 1.0 |
| Carbonyl (C=O) | 1 | 1 | 1.0 |
| Amide | 1 | 1 | 1.0 |
| Acetate | 1 | 1 | 1.0 |
| Thiol | 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。
可能性のある材料
| 素材 | 補助ピーク | 重複グループ | 引用元 |
|---|---|---|---|
| Fe3O4 | 667, 2358, 1673 | Hydroxyl (O-H), Alkyl C-H | 1 |
| asphalt | 667, 1600, 1376 | Alkyl C-H, Hydroxyl (O-H) | 1 |
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 667 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
-
C-S single bond 信頼度 1.0
“The second silicate bands are 4 cm-1 in C-S-H broadly characterized as O-Si-O deformation or bending modes, which occur near 451 470cm-1 cm-1 667cm-1 and in C-A-S-H and the band 663 or is due to Si-O-Si bending vibrations.”
He 等 - 2011 - Morphology and Structure of Aluminum Substituted C DOI: 10.4028/www.scientific.net/AMR.287-290.1193 -
信頼度 1.0
“CR occurs at the peak of 1261 1094 1031 804.7 and 667 cm-1, cm-1 cm-1 The absorption peaks at 1261 1094 and 1031 are identified as the”
Liang 等 - 2017 - Thermo-stability and aging performance of modified DOI: 10.1016/j.matdes.2017.04.060 -
信頼度 1.0
“cm(cid:1)1 a(l) peak at 667 indicates increasing or decreasing bridging coefficient as a function of photon The optical absorption hn oxygen (BO) in the glass system.”
Natural Fe3O4 nanoparticles embedded zinc-tellurite glasses: Polarizability and optical properties DOI: 10.1016/j.matchemphys.2012.11.040 -
Acetate 信頼度 1.0
“cm-1 cm-1 2,956 assigned to C-H stretching (-CH 2CH 2CH 2CH 3, & -CH=CH-), 1,610 and 1,667 cm-1 1H-NMR assigned to C=O stretching, 1,561 assigned to C=C stretching.”
Synthesis and Characterization of Organotin Containing Copolymers: Reactivity Ratio Studies DOI: 10.3390/molecules15031784 -
Sulfate (SO4) 信頼度 1.0
“The IR spectrum is dominated by the bands ascribed to gypsum at 3484 and 3398 (-OH stretch), cm-1 ν 1682 and 1619 (-OH deformation), 1095 (sulfate stretch), and 667 and 594 (sulfate 3”
New Insights into the Medieval Hispano-Muslim Panel Painting: The Alfarje Found in a Balearic Casal (Spain) DOI: 10.3390/molecules28031235 -
Carbon dioxide 信頼度 1.0
“The band centered at 667 due to CO 2.”
Cageao 等 - 2010 - Far-IR Measurements at Cerro Toco, Chile FIRST, R DOI: 10.1029/2005GL025114 -
Sulfate (SO4) 信頼度 1.0
“FTIR-ATR results of the KN-PL3A sample also present the PL3A sample also present the vibration bands referring to the sulphate group (SO42-) at cm-1, 42-) vibration bands referring to the sulphate group (SO at 1100 and 667 together 1100 and”
Mortars from the Palace of Knossos in Crete, Greece: A Multi-Analytical Approach DOI: 10.3390/min12010030 -
信頼度 1.0
“This assignment also 3 cm-1 takes into account the S-O stretching vibrations that CaSO exhibits at 667 and 4 cm-1) that are noticed in the P1 spectrum (669;”
The Origin and Physico-Chemical Properties of Some Unusual Earth Rock Fragments DOI: 10.3390/app12030983
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