What absorbs at 508 cm⁻¹ in an FTIR spectrum?

快速回答

A band near 508 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 508 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

• Alkyl C-H 信心 1.0

  “indica by leaf extract were due to the C-H medium bending and the weak band at 508 from the FTIR it was inferred that the bio-organics such as the flavonoids, alkaloids and steroids phytoconstituents from the leaves served as a strong cappi”

  Krishnan 等 - 2020 - Leaf Extract ofDillenia indicaas a Source of Selen DOI: 10.3390/coatings10070626
• Borate 信心 1.0

  “While the peak at 1410 is for B-N and that at 799 for cm-1 B-N-B vibrations, sharp peak at 508 presents bending vibration of O-B-O.”

  Kumar 等 - 2016 - Emergence of fluorescence in boron nitride nanofla DOI: 10.1039/C6RA05288F.
• Alkene (C=C) 信心 1.0

  “cm-1 cm-1 specifically the peak at 1,727 arising from the carbonyl stretching, whereas the peak at 1,508 cm-1 cm-1 associated with the C=C stretching of the aromatic rings.”

  Incorporation of Hyperbranched Supramolecules into Nafion Ionic Domains via Impregnation and In-Situ Photopolymerization DOI: 10.3390/polym3042018
• Ring structure 信心 1.0

  “Feldspar Raman bands (Figure 11b) correspond to plagioclase and possibly to albite Feldspar Raman bands (Figure 11b) correspond to plagioclase and possibly to albite with the Raman peaks at 292, 479 and 508 cm-1 related to SiO ring vibratio”

  Non-Destructive Study of Egyptian Emeralds Preserved in the Collection of the Museum of the Ecole des Mines DOI: 10.3390/min13020158
• Acetate 信心 1.0

  “Amore direct proof comes from the two new bands in C-O stretching 508 PETROVI],NIKOLI]andMARKOVI] cm-1 region: at 1202.5 (weak) and 1122.5 (very strong) for Zn-Chl, and at 1202.3 cm-1 (weak) and 1118.8 (very strong) for Cu-Chl (Table I);”

  Petrovic 等 - 2006 - In vitro complexes of copper and zinc with chlorop DOI: 10.2298/JSC0605501P
• Aromatic ring 信心 1.0

  “et al., 2019) for high compression forces and anisotropic fiber (Figure 3F) Some bands in the PC1 loading point to a change (Gibson, arrangement for high tensile strength respectively in aromatic components (e.g., aromatic skeletal vibratio”

  From the Soft to the Hard: Changes in Microchemistry During Cell Wall Maturation of Walnut Shells DOI: 10.3389/fpls.2020.00466