What absorbs at 1291 cm⁻¹ in an FTIR spectrum?

快速回答

A band near 1291 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.

可能的官能基指派

排名反映累積的文獻證據，而非單一權威規則。請務必根據您的樣品背景進行確認。

可能的材料

僅當同一文獻庫支援此波段以及至少一個額外特徵峰時，才會顯示材料。

光譜邏輯

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 1291 cm⁻¹ is usually not enough for material identification by itself.

實際使用

此類查詢常見於聚合物鑑別、未知塑膠篩選、品管故障排除、再生材料驗證，以及基於文獻的峰值歸屬審查。

常見錯誤

• 將一個孤立的譜帶視為材料的證據，而未檢查至少一兩個支持峰。
• 忽略重疊：多個官能團可能在相同波數附近貢獻。
• 當添加劑、混合物、氧化或污染物可能扭曲譜圖時，跳過驗證。

驗證建議

當仍然存在歧義時，使用DSC、GC-MS或TGA驗證假設，特別是對於混合物、降解樣品和填充聚合物。

這些指派背後的文獻

• Acetate 信心 1.0

  “Additional bands corresponding to C-O-H bending appeared at 1291 cm-1.”

  Can 等 - 2023 - Choline Chloride-Based Deep Eutectic Solvent-Treat DOI: 10.3390/f14030569
• Amide 信心 1.0

  “Peak at 1291 which also confirms the self-doped structure of the copolycm-1 indicate C N stretching and C H and at 3214 mer as proposed in reaction 1.”

  Dey Sadhu 等 - 2020 - Preparation and characterization of polyanilinea DOI: 10.1002/pc.25738
• Amide 信心 1.0

  “The peak at 1291 was due to C-N stretching vibration and this confirmed the presence of the amine group in pure in the memcm-1 brane matrix.”

  Experimental and DFT studies on the structural and optical properties of chitosan/polyvinyl pyrrolidone/ZnS nanocomposites DOI: 10.1007/s00289-023-04700-0
• Acetate 信心 1.0

  “In addition, a of thermogram which had two melting shifting of the C-O vibration of BA at 1291.40 points at 157.0 and 188.8 °C, respectively, cm-1 to 1379.16 was proof of deprotonation in corresponding to the DES and SA melting”

  Ainurofiq 等 - 2018 - Synthesis, characterization, and stability study o DOI: 10.1080/10837450
• Acetate 信心 1.0

  “In BA, the neutral carboxylic group (-COOH) had a strong carbonyl (C=O) with stretching at a peak of 1686.82 cm-1 and a weak carbonyl (C-O) stretching at 1291.40 cm-1.”

  A Novel Desloratadine-Benzoic Acid Co-Amorphous Solid: Preparation, Characterization, and Stability Evaluation DOI: 10.3390/pharmaceutics10030085
• Fluorine (C-F) 信心 1.0

  “O nline 1300 1300 CF symmetric stretching and rocking 1291 [19] α PVDF 2 L ibrary”

  Chipara 等 - 2020 - Spectroscopic investigations on PVDF-Fe2O3 nanocom DOI: 10.1002/app.48907
• Acetate 信心 1.0

  “The peaks at 1585-1500 cm-1 resulted from the C=C stretching vibrations of the aromatic ring cm-1 C=C at 1585-1500 resulted from the stretching vibrations of the aromatic ring while the peak at while the peak at 1291 cm-1 can be assigned to”

  Kowalczuk - 2020 - FTIR Characterization of the Development of Antimi DOI: 10.3390/coatings10090818
• Alkene (C=C) 信心 1.0

  “The porphyrin peaks at 1494 cm-1 and 1291 cm-1 due to their C=C and C-N stretching can also be seen in the GO@AuNRs-TMePyP spectrum.”

  Graphene Oxide-Gold Nanorods Nanocomposite-Porphyrin Conjugate as Promising Tool for Cancer Phototherapy Performance DOI: 10.3390/ph14121295