What absorbs at 2323 cm⁻¹ in an FTIR spectrum?
A band near 2323 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 2323 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 |
|---|---|---|---|
| Carbon dioxide | 2 | 2 | 1,0 |
| Water (H2O) | 2 | 2 | 1,0 |
| Methacrylate | 1 | 1 | 1,0 |
| Ketone | 1 | 1 | 1,0 |
| Ester | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
| Carbonyl (C=O) | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
| Acetate | 1 | 1 | 1,0 |
| Alkene (C=C) | 1 | 1 | 0,9 |
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 |
|---|---|---|---|
| CuO | 2323, 453, 1000 | Methacrylate | 1 |
| rGO | 2323, 2358, 2930 | Methacrylate | 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 2323 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
-
Water (H2O) zaupanje 1,0
“BR exhibits three water bands at 2323, 2500 in the Batho-minus-rhodopsin difference spectrum”
Ota 等 - 2006 - Structural changes in the Schiff base region of sq DOI: 10.1021/bi051937l -
Carbon dioxide zaupanje 1,0
“The corre2323 and 2345 (O=C=O stretching) and cm-1 spondingbandareasandtheirassignmentsaredetailed 3400 (-OH vibrational stretch) corresponding b-glucan in Table 1.”
Pemmaraju 等 - 2016 - Modulation of Candida albicans Biofilm by Differen DOI: 10.1007/s11046-016-9992-8) -
Water (H2O) zaupanje 1,0
“This is also the case for strongly hydrogen-bonded (-), SrSRI SrSRI the minus spectrum, the bands at 3492 K cm-1 water molecules in BR (2323, 2292, and 2171 bands (-), (+)”
Suzuki 等 - 2008 - Structural Changes of Salinibacter Sensory Rhodops DOI: 10.1021/bi801358b -
Carbon dioxide zaupanje 1,0
“The band at 2323 shows the existence of CO 2.”
Abozaid 等 - 2018 - Characterization of Neodymium Doped Calcium Tungst DOI: 10.2298/SOS1804445A -
zaupanje 1,0
“2368.44cm-1 2323.25cm-1 that appeared at and indicate the made a significant alteration due to aggregation of GV presence of nitrogen linkage, which is present in the molecules on the surface of sorbent, which might reduce the structure of”
Akram 等 - 2021 - Kinetic and Isothermal Investigations of Cost-Effe DOI: 10.1155/2021/5549536 -
Alkene (C=C) zaupanje 0,9
“Explicit assignment: 'vibrations at wavenumbers 2323 ... indicating the presence of C=C'.”
High Selectivity Fuel from Efficient CO2 Conversion by Zn-Modified rGO and Amine-Functionalized CuO as a Photocatalyst DOI: 10.3390/ma16124314
Imate spekter s tem pasom?
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