What absorbs at 682 cm⁻¹ in an FTIR spectrum?

快速回答

A band near 682 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 682 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

• N n bond 信心 1.0

  “(n n cm-1 845 and 971 and are due to stretching vibrations of SiO and 3) and bands at 486 and N 4 1 A (n n cm-1 682 are due to bending vibrations of O-Si-O and 4) [30, 31].”

  Driving the photoluminescent and structural properties of X2-Y2SiO5 by varying the dopant Dy3+ concentration towards cool wLED applications DOI: 10.1016/j.solidstatesciences.2017.05.008
• Silicon (Si) 信心 1.0

  “and the bands at 786.03 cm-1, 682.05 cm-1, and 509.46 cm-1 represent Si-O Quartz, Si-O-Si bending, and Fe-O Fe2O3 Si-O-Al stretching, respectively.”

  Foliar Application of Nanoclay Promotes Potato (Solanum tuberosum L.) Growth and Induces Systemic Resistance against Potato Virus Y DOI: 10.3390/v14102151
• 信心 1.0

  “cm-1 cm-1 cm-1 occur at 1593.5 (NH scissoring vibration), 1503.1 (aromatic ring stretching), 1334.2 2 (SO2 asymmetric stretching), 1144.6 cm-1 (SO2 symmetric stretching) and 681.8 cm-1 (C-Cl stretching).”

  Garbacz 和 Wesolowski - 2018 - DSC, FTIR and Raman Spectroscopy Coupled with Mult DOI: 10.3390/molecules23092136
• Styrene 信心 1.0

  “cm-1, + For St 10% L-M (Figure 3c) the signal intensity was lower, apart from the absorption band at 682 which was related to the decomposition of the unreacted styrene [16].”

  Preparation, Thermal, and Mechanical Characterization of UV-Cured Polymer Biocomposites with Lignin DOI: 10.3390/polym12051159
• 信心 1.0

  “22%, which confirms strong binding between the oleic acid molecules and Fe 4 The third peak is at 682 °C, and the percentage of mass loss is about 2.5% which is attributed to the phase transition from Fe 3O to FeO, because FeO is thermodyna”

  Synthesis, Surface Modification and Characterisation of Biocompatible Magnetic Iron Oxide Nanoparticles for Biomedical Applications DOI: 10.3390/molecules18077533
• Ring structure 信心 1.0

  “The peak at 177 cm-1 is with the highest intensity are 101, 177, 1144, 1456, and 2923 attributed to Zn-N bond vibrations, the peak at 682 cm-1 is attributed to imidazolate ring puckering vibrations, the peak at 1144 cm-1 is attributed to Zn”

  Biocatalysts Synthesized with Lipase from Pseudomonas cepacia on Glycol-Modified ZIF-8: Characterization and Utilization in the Synthesis of Green Biodiesel DOI: 10.3390/molecules27175396
• Metal oxygen 信心 1.0

  “cm-1.36 αCD Figure S1, the peaks observed at m/z 681.56, 1135.96, and appeared at 1129 When, the UMB + inclusion αCD -O-H 1157.99 are related to the molecular ions, [UMB + + complex is formed, bond-stretching frequency of the cm-1, αCD resp”

  Roy 等 - 2020 - Exploring the Inclusion Complex of a Drug (Umbelli DOI: 10.1021/acsomega.0c04716
• 信心 1.0

  “2 cm-1 cm-1 obtained for the data acquired from DSC or FTIR 681.8 (C-Cl stretching), 577.6 (O-H bending (Table 2).”

  Principal component and cluster analyses as supporting tools for co-crystals detection DOI: 10.1007/s10973-017-6436-8