What absorbs at 1668 cm⁻¹ in an FTIR spectrum?
A band near 1668 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 7 cited sources
Aseiniadau grŵp swyddogaethol posibl
| Grŵp swyddogaethol | Ffeithiau ategol | Ffynonellau a ddyfynnwyd | Hyder uchaf |
|---|---|---|---|
| Carbonyl (C=O) | 4 | 3 | 0.9 |
| Amide | 3 | 3 | 0.9 |
| Protein alpha helix | 1 | 1 | 0.9 |
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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Carbonyl (C=O) hyder 0.9
“Explicit assignment: C=O stretching of the try”
Babar 和 Sarkar - 2017 - Self-assembled nanotubes from single fluorescent a DOI: 10.1007/s13204-017-0551-5 -
Carbonyl (C=O) hyder 0.9
“Assigned to carbonyl group peak.”
Deng 和 Lienkamp - 2021 - Self-Regenerating of Functional Polymer Surfaces b DOI: 10.1002/macp.202100127 -
Amide hyder 0.9
“Explicit: 'bands appeared at 1668 ... due to amide group'”
Dixit 等 - 2010 - Development and evaluation of cefadroxil drug load DOI: 10.3797/scipharm.0912-20 -
Protein alpha helix hyder 0.9
“Strong band of α-helix occurs at ~1668 cm-1.”
Gu 等 - 2017 - Synthesis and Properties of Shape Memory Poly(gamm DOI: 10.3390/app7121258 -
Amide hyder 0.9
“Explicit assignment: 'associated with the amide band'”
Ouali 等 - 2021 - Ozone compatibility with polymer nanofiltration me DOI: 10.1016/j.memsci.2011.07.018. -
Carbonyl (C=O) hyder 0.9
“Band at ~1668 cm-1 associated with disordered hydrogen-bonded C=O.”
Qiao 等 - 2022 - Effects of Fiber Volume Fraction and Length on the DOI: 10.3390/polym14153080 -
Amide hyder 0.8
“Explicitly mentioned as Amide I sub-peak.”
Unal 等 - 2018 - Assessing glycation-mediated changes in human cort DOI: 10.1002/jbio.201700352.
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