What absorbs at 1303 cm⁻¹ in an FTIR spectrum?
A band near 1303 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 6 cited sources
Stutt svar
A band near 1303 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 |
|---|---|---|---|
| Amide | 3 | 3 | 1,0 |
| Alkyl C-H | 3 | 3 | 1,0 |
| Secondary amine | 2 | 2 | 1,0 |
| C n single bond | 2 | 2 | 1,0 |
| Methoxy (OCH3) | 1 | 1 | 1,0 |
| Methacrylate | 1 | 1 | 1,0 |
| C-O single bond | 1 | 1 | 1,0 |
| Acetate | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 0,9 |
Röðun endurspeglar uppsöfnuð ritrýnisgögn, ekki eina valdboðsreglu. Staðfestu alltaf í samhengi við sýnið þitt.
Möguleg efni
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 1303 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
-
Amide öryggi 1,0
“(duetoasymmetricCH 3bendingmodeofthemethylgroupofproteins), 1303cm-1 1250cm-1 C-N Measured log Estimated log Peak areas (from bonding of the protein), and (from”
Simple quantitative analysis of Escherichia coli K-12 internalized in baby spinach using Fourier Transform Infrared spectroscopy DOI: 10.1016/j.ijfoodmicro.2010.09.013 -
Amide öryggi 1,0
“cm-1 (stretching), 3065 due to = C-H (aromatic stretching), 2984 and 2950 due to C-H cm-1 cm-1 (stretching), 1696 due to C=O (stretching vibration), 1615 and 1488 due to C=C cm-1 cm-1 (ring stretching), 1445 due to CH3 (stretching), 1303 an”
Adam 等 - 2022 - Comparative Evaluation of Amlodipine Besylate Gene DOI: 10.14227/DT290422PGC2 -
Alkyl C-H öryggi 1,0
“Methane was the second chemical species detected (-C-H with FTIR wavenumber assignments of 1303 and 3015 cm-1, [29,36]).”
Structural and Thermoanalytical Characterization of 3D Porous PDMS Foam Materials: The Effect of Impurities Derived from a Sugar Templating Process DOI: 10.3390/polym10060616 -
Alkyl C-H öryggi 1,0
“(C-N bending) (e, f), 1735 (CO stretching) (d), 1450 and 1368 (CH stretching), 1573 stretching), 1504 (amide II), 1446 2 1234and1071cm-1(C-Ostretching)(g,h).Thechromaticscaleof cm-1 (CH bending), and 1303 (HCC stretching) cm 2 each map qual”
Assessment of microplastic pollution: occurrence and characterisation in Vesijärvi lake and Pikku Vesijärvi pond, Finland DOI: 10.1007/s10661-019-7843-z -
Amide öryggi 1,0
“Pathological examinations with C-H, (lipid) 1400 C-O-H hematoxylin and eosin (H&E) staining were performed in 𝛿 𝛿 C-H, C-O-H, and amide III band 1303 all fifty-six samples.”
Yao 等 - 2014 - The Use of FTIR-ATR Spectrometry for Evaluation of DOI: 10.1155/2014/213890 -
Carboxyl (COOH) öryggi 0,9
“Text: 'two additional peaks at 1303 and 539 are COO- obse' (likely 'observed')”
Marudhu 等 - 2022 - Influence of L-alanine doping on zinc (IRIS) thiou DOI: 10.21203/rs.3.rs-1480676/v1
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