What absorbs at 1763 cm⁻¹ in an FTIR spectrum?
Et bånd nær 1763 cm⁻¹ kan peke på flere funksjonelle grupper. Nedenfor er de mest sannsynlige tildelingene, rangert etter hvor mye publiserte bevis som støtter hver — hver enkelt sporbar til litteratur (DOI) og kryssvalidert mot våre 130 000+ referansespektre og kunnskapsgraf.
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A band near 1763 cm⁻¹ is usually interpreted by checking which functional groups repeatedly co-occur there in the literature, then confirming at least one or two additional peaks in the same sample. This page ranks those assignments by accumulated evidence rather than by a single fixed textbook rule.
Mulige funksjonelle gruppe-tilordninger
| Funksjonell gruppe | Støttende fakta | Siterte kilder | Toppkonfidens |
|---|---|---|---|
| Carbonyl (C=O) | 7 | 4 | 1.0 |
| Ester | 5 | 4 | 1.0 |
| Carboxyl (COOH) | 4 | 4 | 1.0 |
| Methacrylate | 4 | 4 | 1.0 |
| Acetate | 4 | 4 | 1.0 |
| Amide | 4 | 4 | 1.0 |
| Ketone | 3 | 3 | 1.0 |
| Methoxy (OCH3) | 1 | 1 | 1.0 |
| C-O single bond | 1 | 1 | 1.0 |
| Protein | 1 | 1 | 1.0 |
| Anhydride | 1 | 0 | 1.0 |
Rangeringen gjenspeiler akkumulert litteraturbevis, ikke en enkelt autoritativ regel. Bekreft alltid mot prøvekonteksten din.
Mulige materialer
| Materiale | Støttetopper | Overlappende grupper | Siterte kilder |
|---|---|---|---|
| Polyurethanes | 1763, 1740, 1728 | Methacrylate, Carbonyl (C=O), Ester | 1 |
| nanoparticles | 1763, 1732, 1647 | Methacrylate | 1 |
| polymer | 1763, 1718, 1722 | Methacrylate, Carboxyl (COOH), Carbonyl (C=O) | 1 |
| Kraft lignin | 1763, 1744, 1710 | Methacrylate, Carboxyl (COOH) | 1 |
Materialer vises kun når samme litteraturbase støtter dette båndet og minst en annen karakteristisk topp.
Spektrum-logikk
This band becomes meaningful only when read with its neighboring peaks. In practice, analysts first look at the assignments above, then check whether the same sample also shows other peaks expected for the same structural motif. A lone band near 1763 cm⁻¹ is usually not enough for material identification by itself.
Virkelig bruk
Denne typen forespørsel er vanlig i polymeridentifikasjon, screening av ukjent plast, feilsøking i kvalitetskontroll, verifisering av resirkulert materiale og litteraturstøttet gjennomgang av topptilordning.
Vanlige feil
- Behandle ett isolert bånd som bevis på et materiale uten å sjekke minst en eller to støttende topper.
- Ignorerer overlapping: flere funksjonelle grupper kan bidra nær samme bølgetall.
- Hopp over validering når tilsetningsstoffer, blandinger, oksidasjon eller forurensning kan forvrenge spekteret.
Verifiseringsråd
Når tvetydighet gjenstår, valider hypotesen med DSC, GC-MS eller TGA, spesielt for blandinger, nedbrutte prøver og fylte polymerer.
Litteratur bak disse tilordningene
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Acetate konfidens 1.0
“At cm-1, 1763 there is a very small peak that indicates C=O;”
Reactive Oxygen Species (ROS) Are Generated as Organic Contaminants Are Broken Down: SnO DOI: 10.1007/s12668-023-01111-3 -
Protein konfidens 1.0
“The band at about The The 14,24 14,24 Theband Theband 1640 1640 cm1 cm1 is is a a complex complex band band due due to to the the absorption absorption ofwater ofwater bending bending and and amidelofproteins amidelofproteins at at about ab”
Liu 等 - 2006 - Characterization of the basidiomycetes Thelephora DOI: 10.1117/12.710905 -
Amide konfidens 1.0
“The 1649cm-1 1544cm-1 and the amide II at shifting to disappearance of peaks at 1763 and 1460 of FMN-GA proved β-sheet 1542cm-1 1778cm-1 this attachment.”
Sukprasert 等 - 2020 - Synchrotron FTIR Light Reveals Signal Changes of B DOI: 10.1155/2020/6149713 -
Acetate konfidens 1.0
“characteristic C=O absorption peak at 1763 for the pure PMAPOSS, two strong characteristic Figure 1 displays the FTIR spectra, recorded at room temperature, of pure PAS, pure PMAPOSS, cm-1, absorption peaks appeared at 1734 and 1096 corresp”
Minimizing the Strong Screening Effect of Polyhedral Oligomeric Silsesquioxane Nanoparticles in Hydrogen-Bonded Random Copolymers DOI: 10.3390/polym10030303 -
Acetate konfidens 1.0
“Two main cm-1 minima peaks appeared at 1763 and 1735 (Figure S3), based on the second-derivative spectra from Figure 2a, corresponding to C=O groups free from dipole-dipole interactions”
Du 等 - 2022 - Intraand Intermolecular Hydrogen Bonding in Misc DOI: 10.3390/ijms23137018 -
Acetate konfidens 1.0
“(c) 1069 C-O symmetric stretching vibration in EC 1021 C-O symmetric stretching vibration in DEC ΔR = 2 % ΔR = 5 % Negative peaks C=O 1763 stretching vibration in adsorbed or solvated EC C=O 1716 stretching vibration in adsorbed or solvated”
Matsui 等 - 2015 - In-operando FTIR Spectroscopy for Composite Electr DOI: 10.5796/electrochemistry.83.874 -
Ester konfidens 1.0
“cm-1, cm-1 at 1636 while the peak at 1763 belongs to polymerization and crosslinking of the samples at the remaining esters from DMC.”
Santiago-Medina 等 - 2018 - Polyurethanes from Kraft Lignin without Using Isoc DOI: 10.7569/JRM.2017.634172 -
Carboxyl (COOH) konfidens 1.0
“The FTIR C]O indicated that negatively charged carboxyl groups of the PLGA polymer spectra of the PLGA-CPP conjugates also showed a stretch at 1763cm-1 werestill present onthesurface andthat thesurface density ofTATwas for the carboxyl grou”
Comparison of bulk and microfluidics methods for the formulation of poly-lactic-co-glycolic acid (PLGA) nanoparticles modified with cell-penetrating peptides of different architectures DOI: 10.1016/j.ijpx.2019.100030
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