What absorbs at 3604 cm⁻¹ in an FTIR spectrum?
A band near 3604 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 4 cited sources
Quick answer
A band near 3604 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.
可能的官能团归属
| 官能团 | 支持性事实 | 引用来源 | 最高置信度 |
|---|---|---|---|
| Hydroxyl (O-H) | 3 | 3 | 1.0 |
| Methyl | 1 | 1 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
| Carboxyl (COOH) | 1 | 1 | 1.0 |
| Nitrogen heterocycle | 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。
Possible materials
| 材料 | 支持峰 | Overlapping groups | 引用来源 |
|---|---|---|---|
| Ca | 3604, 1045, 1650 | Hydroxyl (O-H), Alkyl C-H, Carboxyl (COOH) | 1 |
| hematite | 3604, 1030, 469 | Hydroxyl (O-H) | 1 |
Materials are shown only when the same literature pool supports this band and at least one additional characteristic peak.
Spectrum logic
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 3604 cm⁻¹ is usually not enough for material identification by itself.
Real-world usage
This type of query is common in polymer identification, unknown plastic screening, QC troubleshooting, recycled-material verification, and literature-backed peak assignment review.
Common mistakes
- Treating one isolated band as proof of a material without checking at least one or two supporting peaks.
- Ignoring overlap: multiple functional groups can contribute near the same wavenumber.
- Skipping validation when additives, blends, oxidation, or contamination may distort the spectrum.
Verification advice
When ambiguity remains, validate the hypothesis with DSC, GC-MS, or TGA, especially for blends, degraded samples, and filled polymers.
这些分配背后的文献
-
Silicon (Si) 置信度 1.0
“3741cm-1 sorption peaks at 3604 and observed on both treatment of H-BEA is as follows: H-BEA powder was imH-BEA and Ca/H-BEA have been assigned to Si (OH) Al mersed in an aqueous solution of an alkaline earth metal nibridge structure and lo”
Atoguchi 和 Kanougi - 2004 - Phenol oxidation over alkaline earth metal ion exc DOI: 10.1016/j.molcata.2004.08.020 -
Hydroxyl (O-H) 置信度 1.0
“at 3536 and a shoulder band at 3604 As shown in previous studies [71], the cm-1 OH bending vibration is situated at 800 in celadonites, while samples containing cm-1.”
Assessment of Easily Accessible Spectroscopic Techniques Coupled with Multivariate Analysis for the Qualitative Characterization and Differentiation of Earth Pigments of Various Provenance DOI: 10.3390/min12060755 -
Carboxyl (COOH) 置信度 1.0
“3b), 1 cm-1, there are strong positive weighted peaks around 3604, 3120 and 2884 which are related to the stretching cm-1, vibration of carboxyl and methyl groups.”
Soil-applied selenite increases selenium and reduces cadmium in roots of Moringa oleifera DOI: 10.1038/s41598-020-77350-1 -
Hydroxyl (O-H) 置信度 0.9
“Brønsted acid site in CHA.”
Negri 等 - 2018 - Investigating the Low Temperature Formation of Cu- DOI: 10.1002/chem.201802769
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