What absorbs at 1338 cm⁻¹ in an FTIR spectrum?
A band near 1338 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
Posibles asignaciones de grupos funcionales
| Grupo funcional | Hechos de respaldo | Fuentes citadas | Confianza máxima |
|---|---|---|---|
| Protein | 2 | 2 | 0,9 |
| Amide | 1 | 1 | 0,9 |
| Alkyl C-H | 1 | 1 | 0,9 |
| Hydroxyl (O-H) | 1 | 1 | 0,9 |
| Borate | 1 | 1 | 0,8 |
| Ammonium | 1 | 1 | 0,8 |
La clasificación refleja la evidencia acumulada de la literatura, no una única regla autorizada. Siempre confirme según el contexto de su muestra.
Literatura detrás de estas asignaciones
-
Protein confianza 0,9
“Used to estimate integrity of collagen network.”
Oinas 等 - 2016 - Imaging of Osteoarthritic Human Articular Cartilag DOI: 10.1038/srep30008 -
Protein confianza 0,9
“Explicit assignment: collagen band at 1338 cm-1.”
Dogan 等 - 2013 - ATR-FTIR spectroscopy reveals genomic loci regulat DOI: 10.1186/1471-2164-14-386 -
Hydroxyl (O-H) confianza 0,9
“Explicit assignment: 'signal at 1338 cm-1 that could be caused both by the hydroxyl group bending'”
Foschi 等 - 2022 - Advanced Analytical Approach Based on Combination DOI: 10.3390/ph15060763 -
Alkyl C-H confianza 0,9
“Absorption peak at 1338 related to stretching bond of C-H”
Koysuren - 2018 - Solid-Phase Photocatalytic Degradation of Polyviny DOI: 10.3390/catal8110499 -
confianza 0,9
“1338 cm-1 flat band assigned to adenine ring vibrations in literature.”
Rakshit 等 - 2022 - Influence of Citrate and Phosphate on the Adsorpti DOI: 10.3389/fenvs.2022.894581 -
Amide confianza 0,9
“Explicit assignment in text: '1338cm-1) (amide I and collagen CH2 side chain peak)'.”
Rieppo 等 - 2019 - Histochemical quantification of collagen content i DOI: 10.1371/journal.pone.0224839 -
confianza 0,9
“Band at 1338 cm-1 used for distinguishing collagen and PGs.”
Swietlicka 等 - 2021 - Fourier Transform Infrared Microspectroscopy Combi DOI: 10.3390/ijms22179189 -
confianza 0,8
“Wagging of proline side chain.”
Samouillan 等 - 2020 - Biophysical and Lipidomic Biomarkers of Cardiac Re DOI: 10.3390/biom10111471
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