What absorbs at 1740 cm⁻¹ in an FTIR spectrum?
A band near 1740 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
Aseiniadau grŵp swyddogaethol posibl
| Grŵp swyddogaethol | Ffeithiau ategol | Ffynonellau a ddyfynnwyd | Hyder uchaf |
|---|---|---|---|
| Carbonyl (C=O) | 49 | 41 | 1.0 |
| Carboxyl (COOH) | 10 | 9 | 1.0 |
| Ester | 8 | 8 | 0.95 |
| Lipid | 7 | 6 | 0.9 |
| Carbohydrate | 2 | 2 | 0.9 |
| Lignin | 2 | 2 | 0.9 |
| Amide | 1 | 1 | 1.0 |
| Acetyl | 1 | 1 | 0.9 |
| Triglyceride | 1 | 1 | 0.9 |
| C=n | 1 | 1 | 0.9 |
| Urethane | 1 | 1 | 0.9 |
| Methyl | 1 | 1 | 0.9 |
| Alkyl C-H | 1 | 1 | 0.8 |
| C-O single bond | 1 | 1 | 0.8 |
| N h | 1 | 1 | 0.8 |
Mae＇r safle＇n adlewyrchu tystiolaeth llenyddiaeth gronnwyd, nid rheol awdurdodol sengl. Cadarnhewch bob amser yn erbyn eich cyd-destun sampl.
Llenyddiaeth y tu ôl i＇r aseiniadau hyn
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hyder 1.0
“Explicitly stated: 'free acid carbonyl peak at 1740 cm-1'”
Akhtar 等 - 2012 - Novel modified release tableted microspheres of ib DOI: 10.5897/AJPP12.349 -
Carbonyl (C=O) hyder 1.0
“Explicit assignment: 'ester carbonyl band (1740 cm-1)'.”
Baij 等 - 2018 - Time-Dependent ATR-FTIR Spectroscopic Studies on S DOI: 10.1021/acs.macromol.8b00890 -
Carboxyl (COOH) hyder 1.0
“Explicit assignment: 'peak at 1740' for -COOH.”
Gao 等 - 2017 - In situ ATR-FTIR investigation and theoretical cal DOI: 10.1039/c7ra04587e -
hyder 1.0
“Explicitly assigned as lipid carbonyl peak.”
Goff 等 - 2020 - Synchrotron FTIR spectromicroscopy as a tool for s DOI: 10.1101/808220 -
Carboxyl (COOH) hyder 1.0
“Explicitly assigned.”
Lv 等 - 2017 - The Adsorption Capacity of GONsCMCFe3O4 Magnetic DOI: 10.3390/ma10010058 -
Carbonyl (C=O) hyder 1.0
“Explicit assignment: 'carbonyl groups (band at 1740)'”
Peris 等 - 2023 - Roadmap for Postnatal Brain Maturation Changes in DOI: 10.1021/acschemneuro.3c00237 -
Amide hyder 1.0
“Explicit assignment: 'amide I and amide II bands, centered at 1656 and 1740 cm-1'”
Wang 等 - 2015 - Synchrotron radiation-based Fourier-transform infr DOI: 10.1016/j.apsb.2015.03.008 -
Carbonyl (C=O) hyder 1.0
“Explicit assignment: 'newly formed strong peak at around 1740 is due to the stretching vibration of -C=O'”
Zhao 等 - 2020 - Sustainable Aromatic Aliphatic Polyesters and Poly DOI: 10.3390/polym12030586
Oes gennych sbectrwm gyda＇r band hwn?
Llwythwch eich sbectrwm FTIR i fyny a chael adroddiad dehongli llawn — aseiniadau brig gyda chyfeiriadau llenyddiaeth, cyfateb llyfrgell, a chadwyn dystiolaeth â gradd hyder — mewn eiliadau.
Dehongli fy sbectrwm