What absorbs at 3494 cm⁻¹ in an FTIR spectrum?
A band near 3494 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 3 cited sources
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) | 2 | 2 | 1.0 |
| N h | 1 | 1 | 1.0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1.0 |
| Carboxyl (COOH) | 1 | 1 | 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。
這些指派背後的文獻
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Hydroxyl (O-H) 信心 1.0
“Citricacidshows cm-1 cm-1, cm-1 characteristic peaks at 3494 for O-H stretching vibrations, 1751 and 1704 C=O stretching for COOH groups.”
Development of Co-Amorphous Loratadine–Citric Acid Orodispersible Drug Formulations DOI: 10.3390/pr10122722 -
Silicon-oxygen (Si-O) 信心 1.0
“1610 Likewise, a strong absorption appears at 1002 attributed to Si-O bond stretching at 3494 cm-1, while the bending vibration of the NH group is seen at 1069 cm-1.”
Synthesis and Characterization of a Novel Borazine-Type UV Photo-Induced Polymerization of Ceramic Precursors DOI: 10.3390/molecules21060801 -
Hydroxyl (O-H) 信心 0.8
“Text: 'shoulder at 3494 ... attributed to the stretching mode OH'.”
Capelletti 等 - 1999 - The OH vibrational spectrum in Bi2TeO5 single crys DOI: 10.1080/10420159908245945
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