What absorbs at 2369 cm⁻¹ in an FTIR spectrum?
A band near 2369 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 2369 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 |
|---|---|---|---|
| Hydroxyl (O-H) | 2 | 2 | 1,0 |
| Alkyl C-H | 1 | 1 | 1,0 |
| Carbon dioxide | 1 | 1 | 1,0 |
| Protein | 1 | 1 | 1,0 |
| N h | 1 | 1 | 0,8 |
Razvrstitev odraža zbrane literaturne dokaze, ne enega avtoritativnega pravila. Vedno preverite glede na kontekst vašega vzorca.
Možni materiali
| Material | Podporni vrhovi | Prekrivajoče se skupine | Citirani viri |
|---|---|---|---|
| polypyrrole | 2369, 1700, 400 | Alkyl C-H | 1 |
| AgNPs | 2369, 1232, 1048 | Alkyl C-H, Hydroxyl (O-H) | 1 |
| gold nanoparticles | 2369, 1638, 3252 | Alkyl C-H, Hydroxyl (O-H) | 1 |
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 2369 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
-
Protein zaupanje 1,0
“The new bands at 2369 and 1519 appeared in FTIR clearly showed structural changes of wool 2θ=33o 47o proteins.”
Gashti 等 - 2015 - Electromagnetic Shielding Response of UV-induced P DOI: 10.1007/s12221-015-0585-9 -
zaupanje 1,0
“Hence peaks at 2345 in both RHBC and CSBC cm(cid:5)1 50.54(cid:1) -C^Cwhile the peak at are tentatively assigned to and the peak at 2369 in CSBC is due to Ca(OH) (JCPDS card in 2 44.67(cid:1) 78.69(cid:1)”
Biochar production and applications in soil fertility and carbon sequestration – a sustainable solution to crop-residue burning in India DOI: 10.1039/c7ra10353k -
Hydroxyl (O-H) zaupanje 1,0
“cm-1 The band observed at 2341.58 (curve-1) and 2368.94 cm-1 (curve-2), which are very nearer band, denotes the Evaluation of Ag-Extract NPs by SEM and TEM presence of hydrogen bonded OH stretching of carboxylic The SEM and TEM analyses sho”
Anthelmintic activity of silver-extract nanoparticles synthesized from the combination of silver nanoparticles and M. charantia fruit extract DOI: 10.1186/s12906-016-1219-5 -
Carbon dioxide zaupanje 1,0
“evolved at 477 and 491 The peak at about 2369 which (cid:2)C was evidenced at 400 indicates the appearance of CO 2.”
Serbezeanu 等 - 2016 - Phosphorus-containing polyimide fibers and their t DOI: 10.1039/c6ra06497c -
Alkyl C-H zaupanje 1,0
“The cm-1 are associated with C-H stretching and the band at 2369 refers to the CO from 2 band at 896 cm-1 is linked to the axial strains of C-O-C bonds and β-glycosidic bonds cm-1 the atmosphere of the analysis.”
Influence of Silanization Treatment of Sponge Gourd (Luffa cylindrica) Fibers on the Reinforcement of Polyester Composites: A Brief Report DOI: 10.3390/polym14163311 -
N h zaupanje 0,8
“Explicit assignment: 'An interesting peak observed at 2369 in the NH- spectrum'”
Rajam 等 - 2017 - Monodispersed Gold Nanoparticles as a Probe for th DOI: 10.17344/acsi.2016.3054
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