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
Hurtigt svar
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.
Mulige funktionelle gruppetildelinger
| Funktionel gruppe | Understøttende fakta | Citerede kilder | Højeste tillid |
|---|---|---|---|
| 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 |
Rangering afspejler akkumulerede litteraturbeviser, ikke en enkelt autoritativ regel. Bekræft altid mod din prøvekontekst.
Mulige materialer
| Materiale | Understøttende toppe | Overlappende grupper | Citerede kilder |
|---|---|---|---|
| GO | 2159, 1720, 1182 | Hydroxyl (O-H) | 1 |
Materialer vises kun, når den samme litteraturpulje understøtter dette bånd og mindst en yderligere karakteristisk top.
Spektrumlogik
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.
Anvendelse i virkeligheden
Denne type forespørgsel er almindelig ved polymeridentifikation, screening af ukendt plast, fejlfinding i kvalitetskontrol, verifikation af genanvendt materiale og litteraturunderstøttet gennemgang af peak-tildeling.
Almindelige fejl
- Behandling af et isoleret bånd som bevis på et materiale uden at kontrollere mindst en eller to understøttende toppe.
- Ignorerer overlap: flere funktionelle grupper kan bidrage nær samme bølgetal.
- Spring validering over, når additiver, blandinger, oxidation eller forurening kan forvrænge spektret.
Verifikationsrådgivning
Når tvetydighed fortsat består, valider hypotesen med DSC, GC-MS eller TGA, især for blandinger, nedbrudte prøver og fyldte polymerer.
Litteratur bag disse tildelinger
-
Silicon hydride tillid 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) tillid 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 tillid 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 tillid 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) tillid 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 tillid 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) tillid 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 tillid 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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