What absorbs at 3197 cm⁻¹ in an FTIR spectrum?
A band near 3197 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 4 cited sources
Stutt svar
A band near 3197 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.
Mögulegar úthlutun virkra hópa
| Virkur hópur | Stuðningsstaðreyndir | Tilvitnuð heimildir | Mesta öryggi |
|---|---|---|---|
| N h | 3 | 3 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Urea | 1 | 1 | 1,0 |
| Methacrylate | 1 | 1 | 1,0 |
| Ketone | 1 | 1 | 1,0 |
| Ester | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
| Carbonyl (C=O) | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
| Acetate | 1 | 1 | 1,0 |
Röðun endurspeglar uppsöfnuð ritrýnisgögn, ekki eina valdboðsreglu. Staðfestu alltaf í samhengi við sýnið þitt.
Möguleg efni
| Efni | Stuðningstindar | Skarast hópar | Tilvitnuð heimildir |
|---|---|---|---|
| starch | 3197, 1650, 1540 | Methacrylate, Alkyl C-H | 1 |
| silica | 3197, 1100, 1080 | Alkyl C-H, Methacrylate | 1 |
| graphene oxide | 3197, 1150, 3400 | Methacrylate, Alkyl C-H | 1 |
Efni birtast aðeins þegar sama bókmenntasafn styður þessa band og að minnsta kosti einn viðbótar einkennandi hámark.
Rófrök
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 3197 cm⁻¹ is usually not enough for material identification by itself.
Raunveruleg notkun
Þessi tegund fyrirspurna er algeng við auðkenningu fjölliða, skimun óþekktra plasttegunda, bilanaleit í gæðaeftirliti, staðfestingu endurunnins efnis og bókmenntabakkaða endurskoðun á hápunktum.
Algeng mistök
- Meðhöndla eina einangraða öldulengd sem sönnun á efni án þess að athuga að minnsta kosti einn eða tvo stuðningstoppa.
- Hunsa skörun: mörg virkir hópar geta lagt sitt af mörkum nálægt sömu bylgjutölunni.
- Að sleppa staðfestingu þegar aukefni, blöndur, oxun eða mengun geta brenglað litrófið.
Staðfestingarráðgjöf
Þegar tvíræðni er eftir, staðfestu tilgátuna með DSC, GC-MS eða TGA, sérstaklega fyrir blöndur, niðurbrotin sýni og fylltar fjölliður.
Ritlist á bak við þessar úthlutanir
-
öryggi 1,0
“3 cm(cid:4)1 all become less intense compared to the strongly bound N-H on The peaks at 3197 and 3065 for the (cid:2)4 nm particles that”
Leewis 等 - 2006 - Ammonia adsorption and decomposition on silica sup DOI: 10.1016/j.apsusc.2005.12.115 -
Acetate öryggi 1,0
“The peak at 3197 is attributed to the overtone of the C=O stretching in urea which is also in Fermi resonance with the N-H stretching mode (Perkins, Painter et al.”
Ternary Natural Deep Eutectic Solvent (NADES) Infused Phthaloyl Starch as Cost Efficient Quasi-Solid Gel Polymer Electrolyte DOI: 10.1016/j.carbpol.2017.03.023 -
Alkyl C-H öryggi 1,0
“In the GO spectrum, one could observe a large absorption band with three peaks at In the GO spectrum, one could observe a large absorption band with three peaks at cm-1 cm-1 3338 and 3197 assigned to the stretching vibration of the C-H and”
Synthesis and Characterization of Some Graphene Oxide Powders Used as Additives in Hydraulic Mortars DOI: 10.3390/app112311330 -
N h öryggi 1,0
“Text: 'vibration at 3197 cm-1 is found in the re-hydrogenated sample'.”
Wang 等 - 2015 - The improved Hydrogen Storage Performances of the DOI: 10.3390/en8076898
Ertu með róf með þessu bandi?
Hladdu upp FTIR-rófinu þínu og fáðu fulla túlkunarskýrslu — toppúthlutun með tilvitnunum í ritrýni, bókasamsvörun og sönnunarkeðju með öryggismati — á nokkrum sekúndum.