What absorbs at 1666 cm⁻¹ in an FTIR spectrum?
A band near 1666 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
Možná přiřazení funkčních skupin
| Funkční skupina | Podpůrná fakta | Citované zdroje | Nejvyšší spolehlivost |
|---|---|---|---|
| Carbonyl (C=O) | 3 | 3 | 1,0 |
| N h | 2 | 2 | 1,0 |
| Protein beta turn | 2 | 2 | 0,9 |
| Amide | 2 | 2 | 0,9 |
| Alkene (C=C) | 1 | 1 | 0,9 |
Pořadí odráží nahromaděné literární důkazy, nikoli jediné autoritativní pravidlo. Vždy potvrďte v kontextu vašeho vzorku.
Literatura za těmito přiřazeními
-
N h spolehlivost 1,0
“Explicit assignment in text: 'peaks at 1723.23 and 1666.12 assigned to COO- and NH groups'”
Mahmud 等 - 2010 - Kinetic Analysis of Oleic Acid Esterification Usin DOI: 10.1021/ie900704n -
Carbonyl (C=O) spolehlivost 1,0
“Explicit assignment in text”
Setyawati 等 - 2017 - Synthesis and Characterization of Novel Benzohydra DOI: 10.1063/1.4978194 -
Protein beta turn spolehlivost 0,9
“Explicit assignment: 'at 1672 and 1666 the β-turns'”
Kristo 等 - 2021 - Optimization of layering technique and secondary s DOI: 10.1371/journal.pone.0260603 -
Carbonyl (C=O) spolehlivost 0,9
“Explicitly assigned as C=O stretch.”
Nowak 和 Sikorski - 2023 - Structural diversity of cocrystals formed from acr DOI: 10.1039/d3ra02300a -
Alkene (C=C) spolehlivost 0,9
“Pronounced peak assigned to C=C stretching vibrations.”
Trpkov 等 - 2022 - Fast, eco-friendly synthesis of blue luminescent n DOI: 10.21203/rs.3.rs-1527206/v1 -
Carbonyl (C=O) spolehlivost 0,9
“Text: 'carbonyl stretch vibration at 1666 observed by FTIR cm-1 belongs to the' (amide context).”
Wu 等 - 2018 - Effective Conversion of Amide to Carboxylic Acid o DOI: 10.3390/membranes8020020 -
Protein beta turn spolehlivost 0,9
“Explicit assignment in text: 'β-turn ... (1,666 cm-1)'”
Yamazaki 等 - 2017 - Protein Phosphorylation and Mineral Binding Affect DOI: 10.3389/fphys.2017.00450 -
Amide spolehlivost 0,8
“Spectral down-shift in amide-I band (1666-1656 cm-1)”
Katayama 等 - 2021 - Vibrational spectroscopy analysis of ligand effica DOI: 10.1038/s42003-021-02836-1
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