What absorbs at 1169 cm⁻¹ in an FTIR spectrum?

クイックアンサー

A band near 1169 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

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

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 1169 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

• Carboxyl (COOH) 信頼度 1.0

  “shoulder band at about The 1459 and 1384cm-1 bands are methyl bending signals and bands at 1243 1169cm-1 The different samples of coatings of amphorae were studied are different bending vibrations from COOH.”

  Font 等 - 2007 - Fourier transform infrared spectroscopy as a suita DOI: 10.1016/j.aca.2007.07.021
• Acetate 信頼度 1.0

  “The C-O-H bending vibrations of the CH 2-OH group appeared at 1435 and the cellulose cm1 skeleton vibrations, including the C-O-C bridge stretching, appeared at 1169 (Hinterstoisser et al., 2001).”

  Wang 等 - 2022 - Molecular-level characterization of changes in the DOI: 10.21203/rs.3.rs-882939/v1
• Amide 信頼度 1.0

  “At 50 the absorption intensity at 1169 at 1409 is assigned to the forcm(cid:0) ◦C 1 C-N is 0.98 a.u., but at 150 it is 1.33 a.u.”

  Curing mechanism of triglycidylamine crosslinked soybean protein adhesive analyzed by Fourier transform infrared, second derivative infrared and two-dimensional correlation spectroscopy DOI: 10.1016/j.ijadhadh.2021.102825
• Alkyl C-H 信頼度 1.0

  “cm-1 Bands at 1169 and 1156 arise from a combination of OH and CH bending vibrations [54].”

  Direct Quantification of Drug Loading Content in Polymeric Nanoparticles by Infrared Spectroscopy DOI: 10.3390/pharmaceutics12100912
• Ester 信頼度 1.0

  “Explicitly assigned to ester group vibrations.”

  Biowaxes from Palm Oil as Promising Candidates for Cosmetic Matrices and Pharmaceuticals for Human Use DOI: 10.3390/ma16124402
• 信頼度 1.0

  “11c) measured after curing for 10 months, the Si-O-Si band (1080 cm-1) is remarkably more pronounced, while the faint Si-O-C band (1169 that is detected in 28 days is barely detected in 10 months, suggesting that polymerization has proceede”

  Karatasios 等 - 2017 - Modification of water transport properties of poro DOI: 10.1515/pac-2016-1104
• Aromatic ring 信頼度 1.0

  “Newly cm-1 O=S=O, appearing peaks at 1169, 956, and 2923 are attributed to the benzene ring group and O=S=O -CH stretching vibrations in the PSSNa molecule, the peaks for and benzene ring shift by 2”

  Liu 等 - 2019 - Novel Selective Depressant of Titanaugite and Impl DOI: 10.3390/min9110703
• Amide 信頼度 1.0

  “940 cm-1 and 1169 cm-1 are C-N stretching vibrations of imidazole groups and C=N stretchThe absorption peak at 903 cm-1 originated from the epoxy group of the polymer, which ing vibrations at 1570 cm-1 [22].”

  Design and Preparation of Imidazole Ionic Liquid-Based Magnetic Polymers and Its Adsorption on Sunset Yellow Dye DOI: 10.3390/ma15072628