What absorbs at 2230 cm⁻¹ in an FTIR spectrum?
A band near 2230 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
Hiter odgovor
A band near 2230 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.
Možne dodelitve funkcionalnih skupin
| Funkcionalna skupina | Podporna dejstva | Citirani viri | Najvišje zaupanje |
|---|---|---|---|
| Nitrile | 2 | 2 | 1,0 |
| C c single bond | 2 | 2 | 1,0 |
| Alkene (C=C) | 1 | 1 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Ring structure | 1 | 1 | 1,0 |
| Adsorbed carbon monoxide | 1 | 1 | 1,0 |
| C-O single bond | 1 | 1 | 1,0 |
| Nitrogen heterocycle | 1 | 1 | 1,0 |
| Isocyanate | 1 | 0 | 1,0 |
Razvrstitev odraža zbrane literaturne dokaze, ne enega avtoritativnega pravila. Vedno preverite glede na kontekst vašega vzorca.
Možni materiali
Materiali so prikazani le, ko ista literaturna podlaga podpira ta pas in vsaj en dodatni karakteristični vrh.
Logika spektra
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 2230 cm⁻¹ is usually not enough for material identification by itself.
Uporaba v resničnem svetu
Ta vrsta poizvedbe je pogosta pri identifikaciji polimerov, pregledovanju neznanih plastičnih mas, odpravljanju težav pri QC, preverjanju recikliranih materialov in literaturno podprtem pregledu dodelitev vrhov.
Pogoste napake
- Obravnavanje enega izoliranega pasu kot dokaza o materialu brez preverjanja vsaj enega ali dveh podpornih vrhov.
- Ignoriranje prekrivanja: več funkcionalnih skupin lahko prispeva blizu istega valovnega števila.
- Izpuščanje validacije, ko lahko dodatki, mešanice, oksidacija ali kontaminacija popačijo spekter.
Nasvet za preverjanje
Ko ostaja dvoumnost, potrdite hipotezo z DSC, GC-MS ali TGA, zlasti za mešanice, degradirane vzorce in polnjene polimere.
Literatura za temi dodelitvami
-
Nitrogen heterocycle zaupanje 1,0
“The FTIR Accepted 14 September 2009 cm(cid:2)1 disappeared showed, with the curing reactionprogressed, the characteristic peak of nitrile at 2230 Available online 20 September 2009 cm(cid:2)1 and triazine ring at 1360 while the characterist”
Synthesis and thermal properties of bisphthalonitriles containing aromatic ether nitrile linkages DOI: 10.1016/j.polymdegradstab.2009.09.006 -
Adsorbed carbon monoxide zaupanje 1,0
“van Bokhoven Table 3 ElementalanalysismeasuredbyICPandcalculatedSi/AlratiobasedontheelementalconcentrationsobtainedfromICP(a).LASandBAScontentfrompyridine-FTIR(b).Carbon monoxide-FTIRanalysis;therelativecontentofacidicsiteswasobtainedfromth”
Batool 等 - 2022 - Correlating Lewis acid activity to extra-framework DOI: 10.3929/ethz-b-000536201 -
C c single bond zaupanje 1,0
“7 shows the In addition, 30H spectrum shows a weak feature centered at FTIR spectra in the stretching region of C-C ring vibrations of the cm-1, 2230 assigned to the stretching modes of CO coordinating 2,4,6-TMP irreversibly adsorbed at roo”
Erigoni 等 - 2016 - Creating Accessible Active Sites in Hierarchical M DOI: 10.1038/ncomms9633. -
Alkyl C-H zaupanje 1,0
“The small peak at 2230 can be ascribed to the stretching and bending modes of C-H.”
Mpelane 等 - 2020 - Application of Novel C-TiO2-CFAPAN Photocatalytic DOI: 10.3390/catal10080909 -
zaupanje 0,9
“Explicitly assigned to cyanogroups”
Wang 等 - 2014 - Target Synthesis of a Novel Porous Aromatic Framew DOI: 10.6023/A14020121 -
zaupanje 0,9
“Explicit assignment: 'a band near 2230 corresponding to adsorbed isocyanate'.”
Diaz Consul 等 - 2008 - NO reduction with CO on alumina-modified silica-su DOI: 10.1016/j.apcata.2008.01.022
Imate spekter s tem pasom?
Naložite svoj FTIR spekter in v nekaj sekundah pridobite celotno poročilo o interpretaciji — dodelitve vrhov z literaturnimi citati, ujemanja knjižnice in verigo dokazov z oceno zaupanja.