What absorbs at 3618 cm⁻¹ in an FTIR spectrum?
A band near 3618 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 3618 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 |
|---|---|---|---|
| Hydroxyl (O-H) | 4 | 4 | 1,0 |
| Alkyl C-H | 2 | 2 | 1,0 |
| Metal hydroxyl | 1 | 1 | 0,8 |
Röðun endurspeglar uppsöfnuð ritrýnisgögn, ekki eina valdboðsreglu. Staðfestu alltaf í samhengi við sýnið þitt.
Möguleg efni
| Efni | Stuðningstindar | Skarast hópar | Tilvitnuð heimildir |
|---|---|---|---|
| oil shale | 3618, 1625, 1053 | Alkyl C-H, 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 3618 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
-
Alkyl C-H öryggi 1,0
“cm-1 C-H in the Peaks at 3618 and 3709 are Kaolinite[12,26].”
Zhao 等 - 2015 - Evaluation of Oil Yield of Oil Shale by Infrared S DOI: 10.1007/s40242-015-4364-3 -
öryggi 1,0
“[36] 2011 Al-Fe-OH the symmetric stretching bands at 3324 and 3618 cm-1 correspond to and 3445-3440 Zeoliticwater”
Benjamin Ortega-Lazcano 等 - 2021 - Study of Pigments from the Colonial Convent of Act DOI: 10.3390/min11080852 -
öryggi 1,0
“This latter amphibole indeed represents a reference point 3618 cm-1, whose relative intensities are correlated with the Mg/Fe2+ ratio at M(1,3).”
Della Ventura 等 - 2018 - Infra Red Spectroscopy of the Regulated Asbestos A DOI: 10.3390/min8090413 -
Hydroxyl (O-H) öryggi 1,0
“LLM confirmed rule peak-group candidate”
Morphology and Selected Properties of Modified Potato Thermoplastic Starch DOI: 10.3390/polym15071762 -
Alkyl C-H öryggi 1,0
“and 3618 The peak related to the asymmetric stretching vibration of methylene at cm-1 2920 [40] was clearly visible in all techniques, while the peak related to the symmetric cm-1 stretching vibration of aliphatic methylene at 2850 [26] was”
Application of FTIR-PAS in Rapid Assessment of Rice Quality under Climate Change Conditions DOI: 10.3390/foods10010159 -
Hydroxyl (O-H) öryggi 0,95
“Text: 'peak at ν = 3618 is due to OH stretching frequencies'”
Microsoft Word - Finished - Mineral Identification of Rocks From Pohon Batu Hot Springs in West Seram Using FTIR Spectroscopy DOI: 10.1088/1742-6596/1572/1/012045 -
Hydroxyl (O-H) öryggi 0,8
“Assigned to stretching vibration of hydroxyl groups.”
Multi-Method Analysis of Painting Materials in Murals of the North Mosque (Linqing, China) DOI: 10.3390/coatings13071298
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