What absorbs at 680 cm⁻¹ in an FTIR spectrum?
A band near 680 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 680 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 | 5 | 5 | 1.0 |
| Silicon (Si) | 3 | 3 | 1.0 |
| Hydroxyl (O-H) | 2 | 2 | 1.0 |
| Silicon-oxygen (Si-O) | 2 | 2 | 1.0 |
| Methoxy (OCH3) | 2 | 1 | 1.0 |
| Methacrylate | 2 | 1 | 1.0 |
| C-O single bond | 2 | 1 | 1.0 |
| Acetate | 2 | 1 | 1.0 |
| Amide | 2 | 1 | 1.0 |
| Ring structure | 2 | 1 | 1.0 |
| Carbonate | 1 | 1 | 1.0 |
| Silicate | 1 | 1 | 1.0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1.0 |
| N h | 1 | 1 | 1.0 |
| Nitrate | 1 | 1 | 1.0 |
| Metalloid oxygen | 1 | 1 | 1.0 |
| Carbohydrate | 1 | 1 | 1.0 |
| Silicon carbon | 1 | 1 | 0.9 |
| Carbonyl (C=O) | 1 | 1 | 0.7 |
| Amine primary | 1 | 1 | 0.7 |
| Hydrogen bond | 1 | 0 | 1.0 |
| Alkyl C-H | 1 | 0 | 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 |
|---|---|---|---|
| ZnO | 680, 1400, 3430 | Metal oxygen, Hydroxyl (O-H) | 2 |
| gelatin | 680, 1652, 3300 | Hydroxyl (O-H) | 1 |
| ZnO NPs | 680, 1664, 875 | Hydroxyl (O-H), Metal oxygen | 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 680 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
“FTIR showed a new absorption at a wavelength of 680 and 1630 which is stretching vibration of symmetry and asymmetry of the Al-O-Al.”
conferenceseries.iop.org materials science and engineering open access proceedings IOP Conferences Series: Materials Science and Engineering DOI: 10.1088/1757-899X/176/1/012049 -
Ring structure 信頼度 1.0
“The strong peaks at 1295, 1260, 1200, 1080, 1030 and The peak occurring at 680, is due to out of plane ring 1000cm-1”
Nagabalasubramanian 等 - 2009 - FTIR and FT Raman spectra, vibrational assignments DOI: 10.1016/j.saa.2009.02.044 -
Carbohydrate 信頼度 1.0
“The cellulose-Ag-Cu nanohybrid cm-1 polymer based nanohybrid colorimetric sensor is thermally further shows characteristics bands at 680 and 620 for stable.”
Colorimetric Based Polysorbate Crosslinked Cellulose-Ag–Cu Nanohybrid Sensor for Urea Sensing Applications DOI: 10.1007/s10924-020-01703-0 -
Metalloid oxygen 信頼度 1.0
“495 26.5 474 25.7 495 43.4 Bending vibrations of Te-O-Te or O-Te-O linkages 4] 620 17.7 621 33.5 625 18.5 Stretching vibrations [TeO 680 15.2 Stretching vibrations [TeO 4]”
Rada 等 - 2009 - Structural and electronic properties of tellurite DOI: 10.1007/s10853-009-3433-8 -
信頼度 1.0
“The low wave cm-1 number region exhibits a strong vibration around 680 which corresponds to antisymmetric Ti-”
Rajakani 和 Vedhi - 2013 - Synthesis and electrochemical studies of TiO2 - Pa DOI: 10.4028/www.scientific.net/AMR.678.263 -
Nitrate 信頼度 1.0
“At the low (NOcm-1 peak at 680 is probably due to nitrate frequency region, the peaks at 180, 320, 370, 410 ) 3”
Sayari 等 - 2015 - Influence of aluminium concentration in Zn0.9V0.1O DOI: 10.1515/msp-2015-0013 -
信頼度 1.0
“The peak position cm-1) of Si-O bridging stretching of omphacite (at 680 is at a lower wavenumber than”
Origin of Blue-Water Jadeite Jades from Myanmar and Guatemala: Differentiation by Non-Destructive Spectroscopic Techniques DOI: 10.3390/cryst12101448 -
信頼度 1.0
“It can be assumed that surface defects, and 680 cm-1 attributed to the Zn-O bond (Figure 5a) [35].”
Babayevska 等 - 2021 - Fabrication of Gelatin-ZnO Nanofibers for Antibact DOI: 10.3390/ma14010103
このバンドを持つスペクトルがありますか？
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