What absorbs at 807 cm⁻¹ in an FTIR spectrum?

快速回答

A band near 807 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 807 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

• 信心 1.0

  “cm(cid:50)1 solution, three peaks appear at 807 immersing in Gravimetric porosity of as-etched porous silicon films was cm(cid:50)1 (cid:126)Si-O-Si mode(cid:33), (cid:126)Si-H asymmetric stretching 886 about 70%.”

  Huang 和 Zhai - 1997 - Fourier transform infrared study of porous silicon DOI: 10.1116/1.589575
• Aromatic ring 信心 1.0

  “vibrations at 2969 and 2862 respectively, and bridges -CH 2at The bands at 807 and cm-1 cm-1 755 are related to aromatic torsion vibrations [25].”

  Synthesis and Characterization of Mesoporous Silica Functionalized with Calix[4]arene Derivatives DOI: 10.3390/ijms131013726
• 信心 1.0

  “TiO nanoparticles have 2 additional peaks were recorded at 1454 and 1381 cm-1, due to the asymmetric and symmetric deformation cm-1 characteristic peaks at 807 corresponding to Ti-O-Ti groups and a broad peak of Ti-OH groups”

  Eleftheriadou 等 - 2020 - Development of Novel Polymer Supported Nanocomposi DOI: 10.3390/app10072368
• Methoxy (OCH3) 信心 1.0

  “corresponding to aliphatic and aromatic -OH (3415 cm-1), aromatic ring modes (1595 cm-1 and 1140 cm-1), carbonyl group (1684 cm-1), aliphatic -CH3 (2944 cm-1) and CH2 groups (1453 cm-1), symmetric -CH3 stretching of the methoxyl groups (285”

  Characterization and Evaluation of Hydrothermal Liquefaction Char from Alkali Lignin in Subcritical Temperatures DOI: 10.3390/ma14113024
• Aromatic ring 信心 1.0

  “cm-1(C=C 807cm-1 1604, 1485 aromatic bending),”

  Lee 和 Kim - 2014 - Synthesis and Characterization of Thermoplastic El DOI: 10.7317/pk.2014.38.5.596
• Metal oxygen 信心 1.0

  “LLM confirmed rule peak-group candidate”

  Gas phase dehydration of glycerol to acrolein over WO3-based catalysts prepared by non-hydrolytic sol–gel synthesis DOI: 10.1039/c8ra01575a
• Alkene (C=C) 信心 1.0

  “resins before (red lines) and after UV-curing process (green lines), it is noticeable that the peak at 1638 cm-1, ascribed to the acrylic C=C stretching and the peaks at 983 cm-1 and at 807 cm-1, characteristic of =C-H stretching in acrylic”

  Rajczak 等 - 2020 - Preparation and Characterization of UV-Curable Acr DOI: 10.3390/polym12020358
• C c single bond 信心 1.0

  “and 1,321 Several studies have shown that the and thus is due to cm-1 Figure 6 shows the FTIR spectra of VEEA and adsorption band at 807 due to C C twisting cm-1 due to C C diethylene glycol monoethyl ether acetate.”

  Curing behavior of a UV‐curable inkjet ink: Distinction between surface‐cure and deep‐cure performance DOI: 10.1002/app.49218