What absorbs at 1679 cm⁻¹ in an FTIR spectrum?
A band near 1679 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
Mga posibleng pagtatalaga ng functional-group
| Grupong functional | Mga sumusuportang katotohanan | Mga nasiping sanggunian | Pinakamataas na kumpiyansa |
|---|---|---|---|
| Carbonyl (C=O) | 3 | 3 | 1.0 |
| Methacrylate | 2 | 2 | 1.0 |
| Ketone | 2 | 2 | 1.0 |
| Ester | 2 | 2 | 1.0 |
| Carboxyl (COOH) | 2 | 2 | 1.0 |
| Amide | 2 | 2 | 1.0 |
| Acetate | 2 | 2 | 1.0 |
| Protein beta sheet | 2 | 2 | 1.0 |
| Protein alpha helix | 1 | 1 | 1.0 |
| N-O bond | 1 | 1 | 1.0 |
| Hydrogen bond | 1 | 1 | 1.0 |
| Metal oxygen | 1 | 0 | 0.8 |
Ang pagraranggo ay sumasalamin sa naipon na ebidensya ng literatura, hindi isang solong awtoritatibong tuntunin. Palaging kumpirmahin laban sa konteksto ng iyong sample.
Literatura sa likod ng mga pagtatalagang ito
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Carbonyl (C=O) kumpiyansa 1.0
“2 shows that the dominant factors FTIR, which aside from showing bands typical of chitosan, influencing conductivity are the input amounts of TPAI and there is now a strong presence of new carbonyl bands at 1679 DMSO into the GPE system.”
Conductivity or rheology? Tradeoff for competing properties in the fabrication of a gel polymer electrolyte based on chitosan-barbiturate derivative DOI: 10.1007/s11581-018-2515-5 -
Acetate kumpiyansa 1.0
“Free DMF molecules give rise to several bands, among them at 1679 at 1679 cm-1 (C=O stretching) and 1095 cm-1 (H3C-N stretching).”
Butova 等 - 2023 - In Situ FTIR Spectroscopy for Scanning Accessible DOI: 10.3390/nano13101675 -
Protein beta sheet kumpiyansa 1.0
“In calculations of the relative content of different secondary structures an average of the cm-1, β-sheet two bands at 1679 and 1630 assigned to keratins with a secondary structure, was used”
Greve 等 - 2008 - ATR-FTIR, FT-NIR and near-FT-Raman spectroscopic s DOI: 10.3233/SPE-2008-0365 -
Hydrogen bond kumpiyansa 1.0
“NIF-NIF intermolecular hydrogen bonding is further indicated by the cm-1 cm-1 presence of strong stretching vibrations at 1679 and 1689 that are also sensitive to intermolecular interactions (Cilurzo et al.”
Physical properties and solubility studies of Nifedipine-PEG 1450/HPMCAS-HF solid dispersions DOI: 10.1039/C5PY01136A -
N-O bond kumpiyansa 1.0
“No significant differences between groups were found for the areas of peaks 1655 cm-1 and 1679 cm-1.”
Effects of Cannabis Use on the Protein and Lipid Profile of Olfactory Neuroepithelium Cells from Schizophrenia Patients Studied by Synchrotron-Based FTIR Spectroscopy DOI: 10.3390/biom10020329 -
Protein alpha helix kumpiyansa 1.0
“View Article Online Paper Nanoscale cm-1 α-helix, preferential, anisotropic behavior and the discovery of the characteristic of the peak of around 1679 is cm-1 effect β-sheet, β-turn keratin polarization (see Fig.”
Stanic 等 - 2018 - The chemical fingerprint of hair melanosomes by in DOI: 10.1039/c8nr03146k -
Protein beta sheet kumpiyansa 1.0
“(cm-1) amide I (C=O stretching, C-N stretching, β-sheet 1693 CNN deformation) of protein secondary structures [33,34] amide I (C=O stretching, C-N stretching, β-sheet 1679 CNN deformation) of protein”
Application of FTIR Spectroscopy to Detect Changes in Skeletal Muscle Composition Due to Obesity with Insulin Resistance and STZ-Induced Diabetes DOI: 10.3390/ijms232012498
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