What absorbs at 3226 cm⁻¹ in an FTIR spectrum?
A band near 3226 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
Stutt svar
A band near 3226 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 | 5 | 5 | 1,0 |
| Hydroxyl (O-H) | 2 | 2 | 1,0 |
| Secondary amine | 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 | 3226, 1650, 1540 | Hydroxyl (O-H) | 1 |
| TiO2 | 3226, 1700, 1093 | Hydroxyl (O-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 3226 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
“cm-1 However, Figure 2(b) shows a peak at 3226 corresponding to N-H of polyaniline as well as 1666”
Burhan 等 - 2020 - Preparation of Cyperus diffusus Vahl cellulose-pol DOI: 10.1088/1757-899X/833/1/012063 -
Hydroxyl (O-H) öryggi 1,0
“The peak centered at 3226 coincides with the OH stretching band of choline chloride and thus it is attributed to the hydrogen bonding between the hydroxyl group of choline ions and the chloride ions (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 -
öryggi 1,0
“molecule has both carbonyl bonds which also another forked absorption band at about 3334.22 and cm-1 can act as a strong hydrogen acceptor as well as (N-H) bond 3226.23 corresponding to the stretching vibration of”
An Intragastric Delivery Device Employing FDM Technology: 3D-Printed Tablet Containing Green Developed Mosapride-Saccharin Co-crystals DOI: 10.1208/s12249-023-02578-9 -
öryggi 1,0
“Bands attributed cm-1 to N-H stretching vibration can be observed at 3226, 3247, 3261, and 3234 for P1, P2, P3, and P4 respectively.”
Comparison of Different Methods for Spongin-like Collagen Extraction from Marine Sponges (Chondrilla caribensis and Aplysina fulva): Physicochemical Properties and In Vitro Biological Analysis DOI: 10.3390/membranes11070522 -
N h öryggi 1,0
“Also it has been shown a change in the NH stretching absorption of cm-1 ∼3226 amines [13];”
Kacso 等 - 2012 - Structural characterization of ambazone salt with DOI: 10.3233/SPE-2012-0570 -
Hydroxyl (O-H) öryggi 1,0
“LLM confirmed rule peak-group candidate”
Mino 等 - 2016 - A surface science approach to TiO2 P25 photocataly DOI: 10.1016/j.apcatb.2016.05.029 -
N h öryggi 0,9
“Part of the range 3326–3226.”
Lin 等 - 2017 - SYNTHESIS AND BIOLOGICAL ACTIVITIES OF 3,6-DISUBST DOI: 10.4314/bcse.v31i3.12
Ertu með róf með þessu bandi?
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