What absorbs at 2159 cm⁻¹ in an FTIR spectrum?
A band near 2159 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 2159 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 |
|---|---|---|---|
| Silicon hydride | 3 | 3 | 1.0 |
| Hydroxyl (O-H) | 2 | 2 | 1.0 |
| Sulfur | 1 | 1 | 1.0 |
| Water (H2O) | 1 | 1 | 1.0 |
| Bronsted acid site | 1 | 1 | 1.0 |
| Bromine | 1 | 1 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
| Secondary amine | 1 | 1 | 1.0 |
| N h | 1 | 1 | 1.0 |
| Silicon (Si) | 1 | 1 | 1.0 |
| C#c | 1 | 1 | 0.9 |
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 |
|---|---|---|---|
| GO | 2159, 1720, 1182 | 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 2159 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
-
Silicon hydride 信頼度 1.0
“Figure 14 shows the changes in the silane peak at 2159 The silane peak did not show any intensity for neat asphalt and LPs of CRMA binders interacted at 160-10 or 160-50.”
Effect of used motor oil as a rejuvenator on crumb rubber modifier’s released components to asphalt binder DOI: 10.1177/1477760620918600 -
Silicon (Si) 信頼度 1.0
“cm-1 ν to step-by-step building up procedure outlined above where DOD, and the 2140 involved solely the three DH, as cm-1 Si-H the particularly grouped species provided the best (Figures S12 and plus two shoulder peaks 2148 and 2159 cm-1 ag”
FTIR Measurement of the Hydrogenated Si(100) Surface: The Structure-Vibrational Interpretation by Means of Periodic DFT Calculation DOI: 10.1021/acs.jpcc.0c11176 -
Silicon hydride 信頼度 1.0
“The cm-1 cm-1 bands at 2159 (S-1) and 2165 (S-28) can be assigned to SiH stretching mode in the small grains, gradually exposed to oxidation during combustion process at intermediate temperature during synthesis given phases.”
Colovic 等 - 2013 - Creating of Highly Active Calcium-Silicate Phases DOI: 10.2298/SOS1303341C -
Alkyl C-H 信頼度 1.0
“Even cm-1 though the band at 2159 represents the ethene CH antisymmetric stretch compound cm-1 and CH 2=CH as a functional group, the bands at 2926 indicate the presence of the”
Maher 等 - 2021 - Optimization of Ultrasound-Assisted Extraction of DOI: 10.3390/antiox10101612 -
Hydroxyl (O-H) 信頼度 1.0
“There is also a small band of Pt in the oxidized sites in cm-1, cm-1 2159 while in 3374 the band corresponds to HOH doubling and OH narrowness.”
Mayorga 等 - 2020 - Bio-hydrogen production using metallic catalysts DOI: 10.24275/rmiq/Cat652 -
Bromine 信頼度 1.0
“3𝐶𝑢𝐼𝐼NO cm-1 cmand 1575 appear, which have been assigned to species (1625, 1610 and 1575 1).[4b, 13b, 14-15] cm-1 NO+ The weak band at 2159 indicates the formation of the nitrosonium ion cm-1 below).[15-16] exchanging Brønsted sites (see Th”
Negri 等 - 2018 - Investigating the Low Temperature Formation of Cu- DOI: 10.1002/chem.201802769 -
Hydroxyl (O-H) 信頼度 1.0
“Considering the asymmetry on cm-1, the low frequency side of the band centered at 2159 modes due to CO physisorption on heterogeneous surface sites, including residual OH groups and/or sulfur anions on the cm-1 basal planes of crystalline M”
Few-Layered MoS2 Nanoparticles Covering Anatase TiO2 Nanosheets: Comparison between Ex Situ and In Situ Synthesis Approaches DOI: 10.3390/app1101 -
C#c 信頼度 0.9
“Explicit: 'band at 2159 for (Figure S1)' and context of acetylenic spacer.”
Mateos-Gil 等 - 2015 - Electroactive carbon nanoforms a comparative stud DOI: 10.1039/c0xx00000x
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