What absorbs at 1671 cm⁻¹ in an FTIR spectrum?
A band near 1671 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
Possibili assegnazioni di gruppi funzionali
| Gruppo funzionale | Fatti di supporto | Fonti citate | Affidabilità massima |
|---|---|---|---|
| Amide | 7 | 5 | 1,0 |
| Methacrylate | 4 | 4 | 1,0 |
| Acetate | 4 | 4 | 1,0 |
| Carboxyl (COOH) | 3 | 3 | 1,0 |
| Carbonyl (C=O) | 3 | 3 | 1,0 |
| Secondary amine | 3 | 3 | 1,0 |
| Hydroxyl (O-H) | 3 | 1 | 1,0 |
| Ketone | 2 | 2 | 1,0 |
| Ester | 2 | 2 | 1,0 |
| Methoxy (OCH3) | 2 | 2 | 1,0 |
| C-O single bond | 2 | 2 | 1,0 |
| N h | 2 | 2 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Protein beta turn | 1 | 1 | 1,0 |
| Aldehyde (CHO) | 1 | 1 | 1,0 |
| C n single bond | 1 | 1 | 1,0 |
| Protein beta sheet | 1 | 1 | 1,0 |
| Protein alpha helix | 1 | 1 | 1,0 |
| Carbohydrate | 1 | 1 | 1,0 |
La classifica riflette le prove bibliografiche accumulate, non una singola regola autorevole. Conferma sempre nel contesto del tuo campione.
Letteratura dietro queste assegnazioni
-
Carbohydrate affidabilità 1,0
“SEM images are widely The peaks at 1671 and correspond to used to examine the surface morphology of polysaccharides the amide bonds and NH group, respectively.”
Almahamid 等 - 2022 - Application of Factorial Design and Response Surfa DOI: 10.1155/2022/1967606 -
Amide affidabilità 1,0
“The two major peaks at 1671 and 1564 were C‚O assigned to the stretching (amide I) and NH bending”
Mechanochemical synthesis of chitosan submicron particles from the gladius of Todarodes pacificus DOI: 10.1016/j.jare.2016.08.006 -
Acetate affidabilità 1,0
“ν(C=C) ν(C=O) 1653 0.3 0.1 + quinone C=O stretching in ν(C=C) ν(C=O) 1671 1.6 0.1 + quinone C=O stretching mode C=O COOH”
Water-Activated Semiquinone Formation and Carboxylic Acid Dissociation in Melanin Revealed by Infrared Spectroscopy DOI: 10.3390/polym13244403 -
Protein alpha helix affidabilità 1,0
“and amide III are shown in The amide I band (1230-1330cm-1) α-helix β-sheet are both caused by the skeleton band The characteristic peaks of and structures are 1652cm-1 1671cm-1, and respectively (Rosana et al., 2012).”
Du 等 - 2022 - Green and Highly Efficient Wool Keratin Extraction DOI: 10.3389/fmats.2021.789081 -
Hydroxyl (O-H) affidabilità 1,0
“The peak at 1671 was assigned to the first suffer The C vibrationsofunsaturatedaldehydestructures,andthesharppeak alcohol radical formed in the reaction can 8 cm-1”
Fu 等 - 2015 - Photosensitized Production of Atmospherically Reac DOI: 10.1021/jacs.5b04051 -
Amide affidabilità 1,0
“For MP, the following vibration peaks are recognized, such as stretching vibration of -NH at 2 cm-1, cm-1, cm-1, 3+ 3393 stretching vibration of -NH at 3155 stretching vibration of C-N at 1671 and”
He 等 - 2019 - Novel Intumescent Flame Retardant Masterbatch Prep DOI: 10.3390/polym11010050 -
Acetate affidabilità 1,0
“(cm-1) Frequency Band Assignment Species C-H 929 out-of-plane deformation 1018 Ring deformation 1081 Furfural 1156 =C-O-C= ring vibration 1279 1570 C=C stretches 1696 C=O aldehyde stretch 1671 C-O 1163 acid stretch vibration 1369 CH symmetr”
Solubility Temperature Dependence of Bio-Based Levulinic Acid, Furfural, and Hydroxymethylfurfural in Water, Nonpolar, Polar Aprotic and Protic Solvents DOI: 10.3390/pr9060924 -
Protein beta turn affidabilità 1,0
“As displayed in we observed eight major absorptions for the pure PTyr-TPA: for the aromatic ring vibrations from Figure10A,weobservedeightmajorabsorptionsforthepurePTyr-TPA:forthearomaticringvibrations PTyr (1595 and 1612 cm-1), the α-helic”
Supramolecular Interactions Induce Unexpectedly Strong Emissions from Triphenylamine-Functionalized Polytyrosine Blended with Poly(4-vinylpyridine) DOI: 10.3390/polym9100503
Hai uno spettro con questa banda?
Carica il tuo spettro FTIR e ottieni un report di interpretazione completo — assegnazioni di picchi con citazioni bibliografiche, corrispondenze con librerie e una catena di prove con valutazione di affidabilità — in secondi.
Interpreta il mio spettro