What absorbs at 649 cm⁻¹ in an FTIR spectrum?
A band near 649 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
Atribuiri posibile ale grupelor funcționale
| Grup funcțional | Fapte suport | Surse citate | Încredere maximă |
|---|---|---|---|
| Methacrylate | 2 | 2 | 1,0 |
| Acetate | 2 | 2 | 1,0 |
| N-O bond | 1 | 1 | 1,0 |
| C c single bond | 1 | 1 | 1,0 |
| Methoxy (OCH3) | 1 | 1 | 1,0 |
| C-O single bond | 1 | 1 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| Ketone | 1 | 1 | 1,0 |
| Ester | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
| Carbonyl (C=O) | 1 | 1 | 1,0 |
| Silicon (Si) | 1 | 1 | 1,0 |
| Adsorbed carbon monoxide | 1 | 1 | 1,0 |
| Borate | 1 | 1 | 1,0 |
| N h | 1 | 1 | 0,9 |
Clasamentul reflectă dovezile acumulate din literatură, nu o singură regulă autoritară. Confirmați întotdeauna în contextul mostrei dvs.
Literatura din spatele acestor atribuiri
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Borate încredere 1,0
“2017).Inalgal cellsbeforebiosorption cm-1 SEM images have clearly shown that Oocystis solitaria samof lithium, the characteristic absorption peak at 649 B-O ples beforeand after lithium biosorption showed different surwhich is assigned to b”
Phycoremediation of lithium ions from aqueous solutions using free and immobilized freshwater green alga Oocystis solitaria: mathematical modeling for bioprocess optimization DOI: 10.1007/s11356-019-05214-x -
Adsorbed carbon monoxide încredere 1,0
“(>99.997 In contrast, as-prepared NiSiBEA sample exhibits a sharp Carbon monoxide purity) was supplied by Linde (>99.0 reduction peak at 649 K and a smaller and broader one at about AG, and nitrogen monoxide purity) was supplied by 785 K (F”
Penkova 等 - 2007 - Effect of the preparation method on the state of n DOI: 10.1021/jp071927p -
încredere 1,0
“bration of Si(Al)-O, the peaks at 787.56 cm-1 and 761.71 cm-1 are assigned to stretching vibration of Si-Si, the peaks at 744.43 cm-1 and 727.85 cm-1 are assigned to stretching vibration of Si-Al(Si), the peaks at 464.98 cm-1 are assigned t”
Effects and Mechanism of Fe3+ on Flotation Separation of Feldspar and Epidote with Sodium Oleate at Natural pH DOI: 10.3390/separations9050110 -
Carbonyl (C=O) încredere 1,0
“The pure NAC molecule showed the main peaks contributed by cm-1), the functional groups of molecules, such as carbonyl -C=O stretching (1,649”
Novel NAC-loaded poly(lactide-co-glycolide acid) nanoparticles for cataract treatment: preparation, characterization, evaluation of structure, cytotoxicity, and molecular docking studies DOI: 10.7717/peerj.4270 -
Hydroxyl (O-H) încredere 1,0
“The broad band between 2900 and cm-1 3600 represents the stretch of the O-H bond, the band at cm-1 1045 indicates a C-O stretch anti-symmetrically coupled to cm-1 the C-C stretch, and the band at 649 is the O-H wag, all of these bands are c”
Research on Misfiring Fault Diagnosis of Engine Based on Wavelet Analysis DOI: 10.25165/j.ijabe.20181105.3748 -
N-O bond încredere 1,0
“Only one thermal decomposition peak appears at 649 C, corresponding to the peak Being an already carbonized material, BC underwent no significant weight loss during the 0.2%/min, T-5% of and the final carbon residue rate was 91.4%.”
Development of Biodegradable Flame-Retardant Bamboo Charcoal Composites, Part II: Thermal Degradation, Gas Phase, and Elemental Analyses DOI: 10.3390/polym12102238 -
N h încredere 0,9
“-NH wagging vibration”
Lu 等 - 2014 - Facile synthesis and characterization of polyethyl DOI: 10.3892/mmr.2014.1906
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