What absorbs at 3645 cm⁻¹ in an FTIR spectrum?
A band near 3645 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 8 cited sources
可能的官能团归属
| 官能团 | 支持性事实 | 引用来源 | 最高置信度 |
|---|---|---|---|
| Hydroxyl (O-H) | 10 | 9 | 1.0 |
| Metal oxygen | 1 | 1 | 1.0 |
| Water (H2O) | 1 | 1 | 1.0 |
| Silicon (Si) | 1 | 1 | 1.0 |
排名反映了累积的文献证据，而非单一的权威规则。请始终对照您的样品背景进行确认。
这些分配背后的文献
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Hydroxyl (O-H) 置信度 1.0
“It is known from the literature that 356 aluminium in highly distorted coordination might become NMR silent and the observed cm-1 357 band at 3645 can be associated to OH groups connected to the so called 'invisible' 358 aluminium species [”
New synthesis routes and catalytic applications of ferrierite crystals. Part 1: 1,8-Diaminooctane as a new OSDA DOI: 10.1016/j.micromeso.2019.109987 -
Hydroxyl (O-H) 置信度 1.0
“The band at 3645cm intime of 3h gave the lowest RPO conversion of 47% because dicated OH stretching vibration of the absorbed water”
Chokpanyarat 等 - 2018 - Synthesis of Ca-Doped Three-Dimensionally Ordered DOI: 10.1155/2018/8056701 -
Hydroxyl (O-H) 置信度 1.0
“t h o cm-1 bacteriorhodopsin78) The apparent depletion band at ~3645 (first observed in was at r M Tyr-5778”
Dioumaev 等 - 2010 - Low-Temperature FTIR Study of Multiple K Intermedi DOI: 10.1021/jp908698f. -
Hydroxyl (O-H) 置信度 1.0
“cm-1 In all the paste samples, the peak at 3645 indicates the presence of free OH In all the paste samples, the peak at 3645 cm-1 indicates the presence of free OH groups, which suggests the presence of the portlandite phase.”
Evaluation of Mechanical and Microstructural Properties and Global Warming Potential of Green Concrete with Wheat Straw Ash and Silica Fume DOI: 10.3390/ma15093177 -
Hydroxyl (O-H) 置信度 1.0
“This resulted in the loss of all B-type carbonate h o cm-1 cm-1 and interestingly, a new hydroxyl peak at 3645 (FTIR spectra) and at 3615 r M”
Carbonate substitution in the mineral component of bone: Discriminating the structural changes, simultaneously imposed by carbonate in A and B sites of apatite DOI: 10.1016/j.jssc.2017.07.025. -
Hydroxyl (O-H) 置信度 1.0
“LLM confirmed rule peak-group candidate”
Morgan 等 - 2007 - Water structural changes in the L and M photocycle DOI: 10.1021/bi0616596. -
Metal oxygen 置信度 1.0
“Further, clay had cm-1 β-CD O-H FT-IR spectra related to (a), (b), PVP (c) Cloisite IR peak at 3645 corresponding to the free cm-1 15A and (d) CCP are shown in Fig.”
Fixed bed adsorption column studies and models for removal of ibuprofen from aqueous solution by strong adsorbent Nano-clay composite DOI: 10.1007/s40201-019-00392-9 -
Hydroxyl (O-H) 置信度 1.0
“The peak at 3645 was attributed to the hydroxyl groups of the montmorillonite layer [36].”
Adsorption of imidazolium and pyridinium ionic liquids onto montmorillonite: characterization and thermodynamic calculations DOI: 10.1016/j.cej.2012.07.128
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