What absorbs at 975 cm⁻¹ in an FTIR spectrum?
A band near 975 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 975 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 |
|---|---|---|---|
| Alkyl C-H | 4 | 4 | 1.0 |
| Methacrylate | 3 | 3 | 1.0 |
| Acetate | 3 | 3 | 1.0 |
| Silicon-oxygen (Si-O) | 3 | 2 | 1.0 |
| Phosphate (PO4) | 2 | 2 | 1.0 |
| Methoxy (OCH3) | 2 | 2 | 1.0 |
| C-O single bond | 2 | 2 | 1.0 |
| Aromatic ring | 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 |
| Hydroxyl (O-H) | 1 | 1 | 1.0 |
| Alkene (C=C) | 1 | 1 | 1.0 |
| S eq o | 1 | 1 | 1.0 |
| Sulfonyl | 1 | 1 | 1.0 |
| Silicate | 1 | 1 | 1.0 |
| C c single bond | 1 | 1 | 1.0 |
| Silicon (Si) | 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。
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 975 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
-
Alkyl C-H 信頼度 1.0
“TheFTIR spectrawere seen to bedominated bya peak at975 for C-Hout ofplane deformation modes alongwith peaks cm(cid:3)1, for C-H bending, C-H stretching and C-C stretching modes at 858, 1113 and 1189 respectively.”
Hussain 和 Pal - 2007 - Synthesis of composite films of mixed Ag-Cu nanocr DOI: 10.1016/j.apsusc.2006.07.074 -
信頼度 1.0
“Intense, shoulder Intense Si-O 1000 SiO2 stretching lattice n/a Intense, shoulder Intense Si-O 975 SiO2 silicate stretching (kaolinite, illite) [86] n/a Intense, shoulder Intense”
FTIR photoacoustic spectroscopy for identification and assessment of soil components_ Chernozems and their size fractions DOI: 10.1016/j.pacs.2020.100162 -
Sulfonyl 信頼度 1.0
“The symmetric symmetric and asymmetric S(=O) stretching vibration and asymmetric O=S=O stretching vibration peaks are 2 peaks and S-N-C absorptions, which appears at 975 cm-1, located at 1180 and 1359 respectively.”
Tosa 等 - 2012 - Simultaneous Determination Of Some Artificial Swee DOI: 10.1063/1.3681976 -
Acetate 信頼度 1.0
“The major auto-peaks of type I in 975cm(cid:2)1 975cm(cid:2)1 which forms a 2(cid:3)2 peak cluster, while those of might stand for the vibration of C-O-C in cyclane.”
Evaluation on intrinsic quality of licorice influenced by environmental factors by using FTIR combined with 2D-IR correlation spectroscopy DOI: 10.1016/j.molstruc.2010.03.017 -
信頼度 1.0
“α-Phase are 975”
Abdullah 等 - 2014 - Effect of annealing process on the phase formation DOI: 10.1063/1.4895187 -
Alkene (C=C) 信頼度 1.0
“M cm-1 975 band was assigned to the wags of the C 7-H and the C 8-H (i.e., coupled in-phase a vibrations of the vinyl protons in -HC 7=C 8H);”
Dioumaev 等 - 2010 - Low-Temperature FTIR Study of Multiple K Intermedi DOI: 10.1021/jp908698f. -
信頼度 1.0
“The weaker bands at 1137 1205cm-1 O bonds (E symmetry) lead to the intense band centred at and are assigned to Si-O stretching in the eight- ∼975cm-1 in Lz.”
Fritsch 等 - 2021 - Structural, textural, and chemical controls on the DOI: 10.5194/ejm-33-447-2021 -
Hydroxyl (O-H) 信頼度 1.0
“While the other bands between 541, 626, the functional group region of stretch and one more peak at 1440 indicates the phenolic -C=O 879, 975 and 1052 cm-1 may be attributed to the -C-Hbending and -C-Clstretching, respectively -OH and is st”
Kumar 等 - 2019 - Equilibrium and Kinetic Studies of Biosorptive Rem DOI: 10.3390/pr7100757
このバンドを持つスペクトルがありますか？
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