What absorbs at 3735 cm⁻¹ in an FTIR spectrum?
A band near 3735 cm⁻¹ can point to several functional groups. Below are the most likely assignments, ranked by how much published evidence supports each — every one traceable to literature (DOI) and cross-validated against our 130,000+ reference spectra and knowledge graph.
Backed by 6 cited sources
快速回答
A band near 3735 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
| 官能基 | 支持事實 | 引用來源 | 最高信心 |
|---|---|---|---|
| Hydroxyl (O-H) | 4 | 4 | 1.0 |
| Water (H2O) | 2 | 2 | 1.0 |
| Hydrogen bond | 1 | 1 | 1.0 |
| Carbohydrate | 1 | 1 | 1.0 |
| Silanol (Si-OH) | 1 | 1 | 1.0 |
| Silicon (Si) | 1 | 0 | 1.0 |
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
| 材料 | 支持峰 | 重疊基團 | 引用來源 |
|---|---|---|---|
| Nanocellulose | 3735, 1540, 1646 | Hydroxyl (O-H), Carbohydrate | 1 |
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 3735 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
-
Silanol (Si-OH) 信心 1.0
“lated silanol peak at 3735 fresh Si-BEA and Ti-BEA samples All changes discussed above relate to silanol groups and do not displayed equivalent peak areas (less than 5% difference) while the necessarily prove any change in the actual Sn sit”
Effect of water treatment on Sn-BEA zeolite: Origin of 960 cm-1 FTIR peak DOI: 10.1016/j.micromeso.2015.02.012 -
Hydroxyl (O-H) 信心 1.0
“only OH-Rb-OH, OH-Rb-F have licic magnesium mica has IR absorptions at 3735 (m), 3695 any expression in the principal OH-stretching region of the”
Synthesis and solid solution in “rubidium richterite”, Rb(NaCa)Mg5Si8O22(OH,F)2 DOI: 10.1007/s00269-019-01037-x -
Hydroxyl (O-H) 信心 1.0
“The transmittance band for -OH at 3735 cm-1, characteristic for the "free" OH cm-1, cellulose [63].”
Bacterial Nanocellulose from Side-Streams of Kombucha Beverages Production: Preparation and Physical-Chemical Properties DOI: 10.3390/polym9080374 -
Hydroxyl (O-H) 信心 1.0
“At 400 and 450 the cm-1), cm-1) 3735 and 3558 -OH stretching vibration or water main chain of EVA broke and released alkanes (2930 olefin (3087 and 1639 cm-1).”
Enhancing Char Formation and Flame Retardancy of Ethylene-Vinyl Acetate Copolymer (EVA)/Aluminum Hydroxide (ATH) Composites by Grafting Ladder Phenyl/Vinyl Polysilsesquioxane (PhVPOSS) DOI: 10.3390/polym15153312 -
信心 1.0
“Indeed, upon heating main bands at 3745 and 3735 cm1 are found in Y and MOR samples, with additional absorptions at ca.”
Sacchetto 等 - 2013 - The interactions of methyl tert-butyl ether on hig DOI: 10.1039/c3cp51684a -
Hydroxyl (O-H) 信心 1.0
“A broad feature of OH stretching vibration, cm-1 attributable to OH stretching mode of SiOH group, together with a negative band at 3735”
Satter 等 - 2020 - Water-Resistant Pt Sites in Hydrophobic Mesopores DOI: 10.1021/acscatal.0c02816
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