What absorbs at 556 cm⁻¹ in an FTIR spectrum?

快速回答

A band near 556 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 556 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

• Metal oxygen 信心 1.0

  “FT-IR confirmed the formation 19 cm-1 20 of the CdO NPs by the presence of strong and sharp peaks at 556 and 602 (Cd-O 21 stretching).”

  Hassanien 等 - 2019 - Novel green route to synthesize cadmium oxide@grap DOI: 10.1088/2053-1591/ab23ac
• 信心 1.0

  “The FTIR spectrum showed a peak at 556 corresponding to the Mg-N stretching.”

  Removal of hazardous pollutants from wastewater: Catalytic applications of Mg nanoparticle functionalized aminoclay DOI: 10.1016/j.molliq.2019.112005
• Metal oxygen 信心 1.0

  “) exist at Besides, vibration peak of S-O(SO metakaolin content increases to 10%, large areas of aggregates bending vibration peaks corresponding to Al-O bond also peelofffromthesurfaceofMK10concrete.Itsexposedamountof 556.2cm-1.”

  Chen 等 - 2021 - Study on Metakaolin Impact on Concrete Performance DOI: 10.3389/fmats.2021.788079
• Metal oxygen 信心 1.0

  “ence of moisture, and at 1120 cm-1 longitudinal Si-O stretching, between 1000 cm-1 and 1030 cm-1 Si-O stretching due to the presence of quartz, O-H folding at 911 cm-1 from internal hydroxyl, Si-O folding at 753 cm-1, perpendicular stretchi”

  Development of an Epoxy Matrix Hybrid Composite with Astrocaryum Aculeatum (Tucumã) Endocarp and Kaolin from the Amazonas State in Brazil DOI: 10.3390/polym15112532
• Silicon (Si) 信心 1.0

  “The band at 556 can be attributed to the symmetric Si-O-Si stretching and O-Si-O bending vibrations of the LTA 4-member ring [53].”

  Recycling of Waste Solution after Hydrothermal Conversion of Fly Ash on a Semi-Technical Scale for Zeolite Synthesis DOI: 10.3390/ma14061413
• Alkene (C=C) 信心 1.0

  “DIMEB and TRIMEB CDs inclusion complexes were measured significant shift of both C=O and C=C vibration modes was ob556 Beilstein J.”

  Interactions between 4-thiothymidine and water-soluble cyclodextrins: Evidence for supramolecular structures in aqueous solutions DOI: 10.3762/bjoc.12.54
• Alkyl C-H 信心 1.0

  “Distinct absorption bands located at 2950 and 2872 cm-1 are attributed to C-H stretching vibrations, while at 556 cm-1 to C-H bending vibrations.”

  Chemical Doping of a Silica Matrix with a New Organic Dye from the Group of Heterocyclic Compounds—Chemical, Optical and Surface Characteristics DOI: 10.3390/cryst12040478
• 信心 0.9

  “Strong absorption at 556 cm-1 for IONP attributed to magnetite.”

  Surface Functionalization of Magnetite Nanoparticles with Multipotent Antioxidant as Potential Magnetic Nanoantioxidants and Antimicrobial Agents DOI: 10.3390/molecules27030789