What absorbs at 633 cm⁻¹ in an FTIR spectrum?

快速回答

A band near 633 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 633 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

  “The FTIR spectra results show (Figure 6) that the absorption peaks at 485, 519, and 633 cm-1 are attributed to the Al-O structural vibration and are characteristic peaks of Al2O3, consistent with the standard infrared peaks of corundum [15]”

  Study on Gemological Characteristics of Blue Sapphires from Baw-Mar Mine, Mogok, Myanmar DOI: 10.3390/cryst11111275
• 信心 1.0

  “C-N The vibrations at 1462 and 1290 cm-1 are generated because of stretching and C-Cl bond is responsible for the bands at 605 and 633 cm-1 bending vibrations, while the (M-O) Er2O3 has a metal-oxygen bond shown at 557 cm-1 [29].”

  New Hybrid PVC/PVP Polymer Blend Modified with Er2O3 Nanoparticles for Optoelectronic Applications DOI: 10.3390/polym15030684
• Phosphate (PO4) 信心 1.0

  “Furthermore, the presence of the bands at 1093, 1033, 991, and 633 cm-1 is related to the phosphate”

  Karami 等 - 2020 - Kinetics of Cross-Linking Reaction of Epoxy Resin DOI: 10.3390/polym12051157
• Hydroxyl (O-H) 信心 1.0

  “This was also supported by the presence of peaks at 633 which indicates the presence of OH groups hydrogen-bonded with SO 3H (Malins et al., 2016).”

  Synthesis and characterization of sulfonated activated carbon as a catalyst for bio-jet fuel production from biomass and waste plastics DOI: 10.1016/j.enconman.2014.07.007
• Alkyl C-H 信心 1.0

  “Vibration of "additional" CH group corresponds to the band near 633 for A2 and S2 at 614 observed 2 CH2 group corresponds to the band near 633 cm-1 for A2 and S2 at 614 cm-1 observed also also in the FTIR spectra.”

  Mikolaszek 等 - 2022 - Microscopic and Spectroscopic Imaging and Thermal DOI: 10.3390/polym14142888
• 信心 1.0

  “cm-1 In the case of the sample JC-03 we find signals at 1175, 1129, 1088, and 987 corresponding to the symmetrical stretching vibration of S-O assigned to the presence of SO 4 cm-1 and at 633 and 608 to the bending vibration of SO 4.”

  Nieto-Villena 等 - 2018 - Infrared Ellipsometry Analysis of Heritage Photogr DOI: 10.1080/00393630.2018.1476962
• S eq o 信心 1.0

  “capacity Moreover, there is an enlarged band with a slight change at 582 cm-1 in the composite 55 removal beads, indicating the sulfonic acid group, due to the combination of the bands at 633 and”

  Potential Application of Innovative Aspergillus terreus/ Sodium Alginate Composite Beads as Eco-Friendly and Sustainable Adsorbents for Alizarin Red S Dye: Isotherms and Kinetics Models DOI: 10.3390/microorganisms11051135
• Phosphate (PO4) 信心 1.0

  “phosphate peaks at 633, 603 and 566 cm and decrease in 4 υ -1 For HAPS intensity.”

  Wang 等 - 2012 - Formation and characterization of silica-coated HA DOI: 10.1515/secm-2011-0124