What absorbs at 1758 cm⁻¹ in an FTIR spectrum?
A band near 1758 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 5 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 |
|---|---|---|---|
| Carbonyl (C=O) | 3 | 3 | 1.0 |
| Ester | 2 | 2 | 1.0 |
| Alkyl C-H | 2 | 2 | 1.0 |
| Carbohydrate | 1 | 1 | 1.0 |
| Methacrylate | 1 | 1 | 1.0 |
| Ketone | 1 | 1 | 1.0 |
| Carboxyl (COOH) | 1 | 1 | 1.0 |
| Amide | 1 | 1 | 1.0 |
| Acetate | 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
“The peak cm-1 cm-1 positioned 1758 is assigned to the carbonyl group of the branched polylactide.”
Saetae 和 Magaraphan - 2015 - Synthesis and study of sericin-g-PLA DOI: 10.1063/1.4918510 -
Alkyl C-H 置信度 1.0
“cm-1, (carbonil) absorption band at 1758 the bands corresponding to the asymmetric and symmetric bending cm-1, cm-1 the vibration peak of methane (-CH) groups at 1270 are vibrations of methyl groups at 1451 and 1383 cm-1 characteristic poly”
Ceyhan 等 - 2008 - Analysis of degradation failure of poly L-lactic a DOI: 10.3944/AOTT.2008.284 -
Acetate 置信度 1.0
“The absorption band at 1758 corresponded cm-1 to the stretching modes of the C=O functional groups.”
Hagos 等 - 2022 - NEW ANALYTICAL METHODS FOR THE DETERMINATION OF AS DOI: 10.4314/bcse.v36i2.3 -
Carbohydrate 置信度 1.0
“After modification, new peaks occurred at 1758 showed that PPL contained cellulose, hemicellulose, lignin, and pectin.”
Pomelo Peel Modified with Citrate as a Sustainable Adsorbent for Removal of Methylene Blue from Aqueous Solution DOI: 10.3390/molecules23061342 -
Alkyl C-H 置信度 1.0
“enthalpy(Jg(cid:1)1)thatwas cm(cid:1)1 cm(cid:1)1 C]O calculatedfrom thefusionpeakinDSC Moreover, the 1758 and 2995 were assigned to DH* C-H -CH curve, and in ester bond and in is the theoretical enthalpy of completely crys3, which are well”
One-pot route to graft long-chain polymer onto silica nanoparticles and its application for high-performance poly(l-lactide) nanocomposites DOI: 10.1039/c9ra01360a
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