What absorbs at 771 cm⁻¹ in an FTIR spectrum?
A band near 771 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 771 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 |
|---|---|---|---|
| Chlorine | 2 | 2 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| C-O single bond | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Adsorbed carbon monoxide | 1 | 1 | 1,0 |
| Silicon-oxygen (Si-O) | 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 |
|---|---|---|---|
| cellulose | 771, 1735, 1650 | C-O single bond, Hydroxyl (O-H) | 1 |
| hemicellulose | 771, 1730, 897 | C-O single bond, Hydroxyl (O-H) | 1 |
| lignin | 771, 1035, 1510 | C-O single bond, Hydroxyl (O-H) | 1 |
| biomass | 771, 1082, 1282 | Hydroxyl (O-H), C-O single bond | 1 |
| zeolite | 771, 1013, 1245 | Hydroxyl (O-H) | 1 |
| gold nanoparticles | 771, 1638, 3252 | 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 771 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
“The major peaks recorded in the pure DFX sample were attributed to the cm-1), cm-1), functional groups: -O-H stretching (3433 carboxylic -C=O stretching (1638 cm-1) cm-1), C-F stretching (1061 and C-Cl stretching (771 which confirms the pur”
Delafloxacin-Capped Gold Nanoparticles (DFX-AuNPs): An Effective Antibacterial Nano-Formulation of Fluoroquinolone Antibiotic DOI: 10.3390/ma15165709 -
öryggi 1,0
“790 Si-O-Sistretching 771 C-Hout-of-plane 558 Si-O-Si”
Investigation of Hybrid Films Based on Fluorinated Silica Materials Prepared by Sol–Gel Processing DOI: 10.3390/coatings12101595 -
Adsorbed carbon monoxide öryggi 1,0
“cm-1, bands of carbon dioxide at 2317 and 3728 cm-1, the rotovibrational band due to CO deformation at bands of carbon dioxide at 2317 and 3728 the rotovibrational band due to CO deformation at 2 2 cm-1, cm-1), 771 the rotovibrational band”
Thermocatalytic Pyrolysis of Exhausted Arthrospira platensis Biomass after Protein or Lipid Recovery DOI: 10.3390/en13205246 -
Alkyl C-H öryggi 1,0
“848 C-H stretching 771 Stretching of the -OH group 3353 N-H stretching & O-H stretching”
Zhuang 等 - 2020 - Observation of Potential Contaminants in Processed DOI: 10.3390/app10124345
Ertu með róf með þessu bandi?
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