FTIR 谱图中在 3664 cm⁻¹ 处吸收的是什么？
A band near 3664 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 320,000+ reference spectra and knowledge graph.
Backed by 3 cited sources
快速答案
在3664 cm⁻¹附近的谱带通常通过检查文献中哪些官能团在该处反复出现来解释，然后确认同一个样品中至少有一个或两个额外的峰。本页面根据累积证据而非单一固定的教科书规则对这些归属进行排序。
可能的官能团归属
排名反映的是累积的文献证据，而非单一的固定规则。请始终根据您的样品背景进行确认。
光谱逻辑
该谱带只有与其相邻峰一起解读时才有意义。在实践中，分析人员首先查看上述归属，然后检查同一样品是否也显示同一结构基序的其他预期峰。单独的3664 cm⁻¹附近谱带通常不足以单独鉴定材料。
实际应用
此类查询常见于聚合物鉴定、未知塑料筛查、质控故障排除、回收材料验证以及有文献支持的峰归属复核。
常见错误
- 将孤立的一个谱带视为材料的证据，而不检查至少一个或两个支持峰。
- 忽略重叠：多个官能团可能在相同波数附近有贡献。
- 当添加剂、混合物、氧化或污染可能使光谱失真时，跳过验证。
验证建议
当仍有歧义时，通过DSC、GC-MS或TGA验证假设，特别是对于混合物、降解样品和填充聚合物。
这些分配背后的文献
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羟基 (O-H) 置信度 1.0
“Furthermore, an additional band appeared at 3664 whose attribution was hard from the literature data since it could correspond either to bridging OH groups [62,63] or to hydrogen bonded OH groups [62,63b] or to Ti VI-OH located on the 2”
Unravelling water effects on solid acid catalysts: Case study of TiO 2 /SiO 2 as a catalyst for the dehydration of isobutanol DOI: 10.1016/j.jcat.2016.12.007 -
羟基 (O-H) 置信度 1.0
“A A h o spectrum hydrated with H 2O (red line) has peaks at 3664 (+), 3657 (-), 3622 (-), 3587 (-) and r cm-1.”
Iwata 等 - 2009 - Identification of FTIR Bands Due to Internal Water DOI: 10.1021/bi801990s. -
羟基 (O-H) 置信度 0.9
“The text states: 'two shoulders at ~3664 and ~3615 that were assigned to arrangements having ... OH stretching'.”
Tobelite and NH4+-rich muscovite single crystals from Ordovician Armorican sandstones (Brittany, France): Structure and crystal chemistry DOI: 10.2138/am.2012.4023
是否有此波段的光谱？
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