What absorbs at 1747 cm⁻¹ in an FTIR spectrum?
A band near 1747 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
Mahdolliset funktionaalisten ryhmien määritykset
| Funktionaalinen ryhmä | Tukevat tosiasiat | Viitatut lähteet | Korkein luottamus |
|---|---|---|---|
| Carbonyl (C=O) | 21 | 21 | 1,0 |
| Methacrylate | 15 | 14 | 1,0 |
| Acetate | 15 | 14 | 1,0 |
| Carboxyl (COOH) | 14 | 13 | 1,0 |
| Ester | 13 | 12 | 1,0 |
| Ketone | 10 | 10 | 1,0 |
| Amide | 10 | 10 | 1,0 |
| Methoxy (OCH3) | 6 | 5 | 1,0 |
| C-O single bond | 5 | 4 | 1,0 |
| Alkyl C-H | 4 | 4 | 1,0 |
| Protein | 2 | 2 | 1,0 |
| Lipid | 2 | 2 | 1,0 |
| Hydrogen bond | 2 | 1 | 1,0 |
| Hydroxyl (O-H) | 2 | 1 | 1,0 |
| Carbonate | 2 | 1 | 1,0 |
| Protein beta sheet | 1 | 1 | 1,0 |
| Methyl | 1 | 1 | 1,0 |
| Carbohydrate | 1 | 1 | 1,0 |
| Aromatic ring | 1 | 1 | 1,0 |
| Lignin | 1 | 1 | 1,0 |
Sijoitus kuvastaa kertyneitä kirjallisuustodisteita, ei yhtä auktoritatiivista sääntöä. Varmista aina suhteessa näytteesi asiayhteyteen.
Näiden määritysten taustalla oleva kirjallisuus
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Carboxyl (COOH) luottamus 1,0
“It CAP, resulting in the formation of stearic acid due to the 1541cm(cid:2)1 was also found that both IR peak intensities at 1747 and degradation of MgSt caused by neutralization of acidic CAP.”
Cheng 等 - 2008 - Effect of moisture content on solid-state interact DOI: 10.1016/j.apsusc.2008.08.009 -
Carbonate luottamus 1,0
“stretch for linear poly(propylene carbonate) with waveassigned to the stretching vibration for the cm(cid:4)1.42 a-pinane number at 1747 This peak was conspicuously absent in the carbonate Apart from the characteristic FTIR cm(cid:4)1 cm(ci”
Synthesis of cyclic α-pinane carbonate – a potential monomer for bio-based polymers DOI: 10.1039/d1ra07943c -
Alkyl C-H luottamus 1,0
“2660 δ(C-H) Stretching vibration δ(COH), δ(CCH), δ(OCH), Stretching and bending 1747 β-Sheet of amide I”
Hssaini 等 - 2022 - Do Pollination and Pollen Sources Affect Fig Seed DOI: 10.1155/2022/3969165 -
Ester luottamus 1,0
“Neat PLA D cm-1 was found with characteristic bands that were displayed at approximately 1180 and 1747 cm-1, CEPTE which were assigned to stretching of the ester (C-O-C) and carbonyl functional groups (C=O) as reported in the literature[27,”
Effect of silica resources on the biodegradation behavior of poly (lactic acid) and chemical crosslinked poly (lactic acid) composites DOI: 10.1016/j.polymertesting.2018.08.026 -
Carbonyl (C=O) luottamus 1,0
“The weak peak at 1747 is the characteristic band for carbonyl (C=O) T stretching that represents the ester linkage of lignin and hemicellulose.”
Rout 等 - 2017 - A green approach to produce silver nano particles DOI: 10.1016/j.surfin.2017.03.004 -
Aromatic ring luottamus 1,0
“The peak at 1747 cm-1 was flavonoids and aromatic ring deformations), 1571 (N-H bending and C-N stretching in the amide”
Pleurotus Mushrooms Content in Glucans and Ergosterol Assessed by ATR-FTIR Spectroscopy and Multivariate Analysis DOI: 10.3390/foods9040535 -
Carbonyl (C=O) luottamus 1,0
“firmed because if the spectra of the PLA and the PHB are (14824 00 ±508 45MPa), mixture PLA/PHB/Ag 74.5/24.5/1 observed separately, it is noted that for the PLA (4032), the an approximate increase of 264.56% is evidenced, whereas if carbony”
Cardenas-Trivino 等 - 2019 - Synthesis and Properties of Bionanocomposites of P DOI: 10.1155/2019/4520927 -
Carbonyl (C=O) luottamus 1,0
“The ester carbonyl band in CCA appeared at 1747”
Detection of Human Cholangiocarcinoma Markers in Serum Using Infrared Spectroscopy DOI: 10.3390/cancers13205109
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