What absorbs at 2159 cm⁻¹ in an FTIR spectrum?
A band near 2159 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 8 cited sources
Schnelle Antwort
A band near 2159 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.
Mögliche Funktionsgruppenzuweisungen
| Funktionelle Gruppe | Unterstützende Fakten | Zitierte Quellen | Höchstes Vertrauen |
|---|---|---|---|
| Silicon hydride | 3 | 3 | 1,0 |
| Hydroxyl (O-H) | 2 | 2 | 1,0 |
| Sulfur | 1 | 1 | 1,0 |
| Water (H2O) | 1 | 1 | 1,0 |
| Bronsted acid site | 1 | 1 | 1,0 |
| Bromine | 1 | 1 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Secondary amine | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| Silicon (Si) | 1 | 1 | 1,0 |
| C#c | 1 | 1 | 0,9 |
Das Ranking spiegelt die gesammelte Literatur Evidenz wider, nicht eine einzelne maßgebliche Regel. Bestätigen Sie immer anhand Ihres Probenkontexts.
Mögliche Materialien
| Material | Unterstützende Peaks | Überlappende Gruppen | Zitierte Quellen |
|---|---|---|---|
| GO | 2159, 1720, 1182 | Hydroxyl (O-H) | 1 |
Materialien werden nur angezeigt, wenn derselbe Literaturpool diese Bande und mindestens einen weiteren charakteristischen Peak unterstützt.
Spektrumslogik
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 2159 cm⁻¹ is usually not enough for material identification by itself.
Praktische Anwendung
Diese Art von Abfrage ist üblich bei der Polymeridentifikation, dem Screening unbekannter Kunststoffe, der Fehlersuche in der Qualitätskontrolle, der Verifizierung von Recyclingmaterial und der literaturgestützten Überprüfung der Peakzuordnung.
Häufige Fehler
- Behandlung einer isolierten Bande als Beweis für ein Material, ohne mindestens einen oder zwei unterstützende Peaks zu überprüfen.
- Überlappung ignorieren: Mehrere funktionelle Gruppen können nahe der gleichen Wellenzahl beitragen.
- Überspringen der Validierung, wenn Additive, Mischungen, Oxidation oder Verunreinigungen das Spektrum verfälschen können.
Beratung zur Verifizierung
Wenn weiterhin Mehrdeutigkeit besteht, validieren Sie die Hypothese mit DSC, GC-MS oder TGA, insbesondere bei Mischungen, degradierten Proben und gefüllten Polymeren.
Literatur hinter diesen Zuweisungen
-
Silicon hydride Vertrauen 1,0
“Figure 14 shows the changes in the silane peak at 2159 The silane peak did not show any intensity for neat asphalt and LPs of CRMA binders interacted at 160-10 or 160-50.”
Effect of used motor oil as a rejuvenator on crumb rubber modifier’s released components to asphalt binder DOI: 10.1177/1477760620918600 -
Silicon (Si) Vertrauen 1,0
“cm-1 ν to step-by-step building up procedure outlined above where DOD, and the 2140 involved solely the three DH, as cm-1 Si-H the particularly grouped species provided the best (Figures S12 and plus two shoulder peaks 2148 and 2159 cm-1 ag”
FTIR Measurement of the Hydrogenated Si(100) Surface: The Structure-Vibrational Interpretation by Means of Periodic DFT Calculation DOI: 10.1021/acs.jpcc.0c11176 -
Silicon hydride Vertrauen 1,0
“The cm-1 cm-1 bands at 2159 (S-1) and 2165 (S-28) can be assigned to SiH stretching mode in the small grains, gradually exposed to oxidation during combustion process at intermediate temperature during synthesis given phases.”
Colovic 等 - 2013 - Creating of Highly Active Calcium-Silicate Phases DOI: 10.2298/SOS1303341C -
Alkyl C-H Vertrauen 1,0
“Even cm-1 though the band at 2159 represents the ethene CH antisymmetric stretch compound cm-1 and CH 2=CH as a functional group, the bands at 2926 indicate the presence of the”
Maher 等 - 2021 - Optimization of Ultrasound-Assisted Extraction of DOI: 10.3390/antiox10101612 -
Hydroxyl (O-H) Vertrauen 1,0
“There is also a small band of Pt in the oxidized sites in cm-1, cm-1 2159 while in 3374 the band corresponds to HOH doubling and OH narrowness.”
Mayorga 等 - 2020 - Bio-hydrogen production using metallic catalysts DOI: 10.24275/rmiq/Cat652 -
Bromine Vertrauen 1,0
“3𝐶𝑢𝐼𝐼NO cm-1 cmand 1575 appear, which have been assigned to species (1625, 1610 and 1575 1).[4b, 13b, 14-15] cm-1 NO+ The weak band at 2159 indicates the formation of the nitrosonium ion cm-1 below).[15-16] exchanging Brønsted sites (see Th”
Negri 等 - 2018 - Investigating the Low Temperature Formation of Cu- DOI: 10.1002/chem.201802769 -
Hydroxyl (O-H) Vertrauen 1,0
“Considering the asymmetry on cm-1, the low frequency side of the band centered at 2159 modes due to CO physisorption on heterogeneous surface sites, including residual OH groups and/or sulfur anions on the cm-1 basal planes of crystalline M”
Few-Layered MoS2 Nanoparticles Covering Anatase TiO2 Nanosheets: Comparison between Ex Situ and In Situ Synthesis Approaches DOI: 10.3390/app1101 -
C#c Vertrauen 0,9
“Explicit: 'band at 2159 for (Figure S1)' and context of acetylenic spacer.”
Mateos-Gil 等 - 2015 - Electroactive carbon nanoforms a comparative stud DOI: 10.1039/c0xx00000x
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