What absorbs at 1776 cm⁻¹ in an FTIR spectrum?
A band near 1776 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
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 |
|---|---|---|---|
| Methacrylate | 3 | 3 | 1.0 |
| Acetate | 3 | 3 | 1.0 |
| Carbonyl (C=O) | 3 | 3 | 1.0 |
| Ketone | 2 | 2 | 1.0 |
| Ester | 2 | 2 | 1.0 |
| Carboxyl (COOH) | 2 | 2 | 1.0 |
| Amide | 2 | 2 | 1.0 |
| Methyl | 1 | 1 | 1.0 |
| Methoxy (OCH3) | 1 | 1 | 1.0 |
| Alkyl C-H | 1 | 1 | 1.0 |
| Silicate | 1 | 1 | 1.0 |
| Silicon-oxygen (Si-O) | 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
-
Carbonyl (C=O) 置信度 1.0
“LLM confirmed rule peak-group candidate”
Majeed 等 - 2017 - Lignin macromolecule's implication in slowing the DOI: 10.1002/star.201600362 -
Acetate 置信度 1.0
“Conversely, the Raman band at 1776 of the C=O stretching vibration was weak but very intense in the IR spectrum in Fig.”
Optical photothermal infrared spectroscopy with simultaneously acquired Raman spectroscopy for two-dimensional microplastic identification DOI: 10.1038/s41598-022-23318-2 -
Acetate 置信度 1.0
“(cm-1): 1H FTIR 3306 (NH), 1841 (C=O stretching), 1776 (C=O), 1592, 751, 713 (Ar).”
Supramolecular Interactions Induce Unexpectedly Strong Emissions from Triphenylamine-Functionalized Polytyrosine Blended with Poly(4-vinylpyridine) DOI: 10.3390/polym9100503 -
Silicon (Si) 置信度 1.0
“It was characterized by a marked vibrational cm-1 peak at 1776 that may be attributed to Si-O overtone of silicates, although major vibrational peaks of olivine could not be observed due to strong absorption at low wavenumbers.”
Tracking hidden organic carbon in rocks using chemometrics and hyperspectral imaging DOI: 10.1038/s41598-018-20890-4 -
Acetate 置信度 1.0
“3) of bismaleimide shows a strong absorption at 1715 O cm-1 cm-1 and a weak absorption at 1776 due to symmetric CH3 OO C and asymmetric C=O stretching vibrations of the imide ring, O”
Sivasankari 等 - 2013 - Synthesis and Characterization of Thiophene Contai DOI: 10.14233/ajchem.2013.13514 -
置信度 0.9
“Described as stretching vibration peak.”
Banerjee 和 Balasubramanian - 2015 - Nanotexturing of PCn-HA nanocomposites by innovat DOI: 10.1039/c4ra15488f
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