What absorbs at 1289 cm⁻¹ in an FTIR spectrum?
A band near 1289 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
Hiter odgovor
A band near 1289 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 |
|---|---|---|---|
| Alkyl C-H | 3 | 3 | 1,0 |
| C n single bond | 3 | 3 | 1,0 |
| Secondary amine | 2 | 2 | 1,0 |
| Amide | 2 | 2 | 1,0 |
| C c single bond | 1 | 1 | 1,0 |
| N-O bond | 1 | 1 | 1,0 |
| Methoxy (OCH3) | 1 | 1 | 1,0 |
| Methacrylate | 1 | 1 | 1,0 |
| C-O single bond | 1 | 1 | 1,0 |
| Acetate | 1 | 1 | 1,0 |
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 |
|---|---|---|---|
| TiO2 | 1289, 1700, 1093 | Alkyl C-H | 1 |
| silver nanoparticles | 1289, 1636, 1631 | Alkyl C-H, Amide | 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 1289 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
-
Amide zaupanje 1,0
“Summary of molecular vibration of PBS chromophore (cm-1) Group Wavenumber, 𝝂 700 C-H bending 754 C-H bending of 776 C-H bending 1079 S=O stretching Pre-pro 1218 C-N stretching 1289 C-N stretching 1330 S=O stretching 1402 S=O stretching 1427”
Power-Dependent Nonlinear Optical Behaviours of Ponceau BS Chromophore at 532 nm via Z-Scan Technique DOI: 10.1016/j.jphotochem.2020.112574 -
Alkyl C-H zaupanje 1,0
“The increasing tendency peak of C-H bending vibration and C-O symmetric stretching cm-1 cm-1 and 1289 , below 0.6 g/l and decreasing tendency from 0.6 g/l to 1.4 g/l in acyloxy group located at 1461.17 and unmodified respectively.”
Wang 等 - 2018 - Coloration and Decoloration of Textiles Using a Ti DOI: 10.1007/s12221-018-1134-0 -
Amide zaupanje 1,0
“C-N bending vibration to 1289 cm-1.”
Gamma Radiation-Induced Synthesis and Characterization of Decahedron-Like Silver Nanostructure and Their Antimicrobial Application DOI: 10.1007/s10904-023-02718-5 -
Alkyl C-H zaupanje 1,0
“In addition, an increase in the intensity for the C-H bending vibration bands of CH2 from the aliphatic chain could be observed at 1224 cm-1 and 1289 cm-1.”
Spectroscopic Characterization of Emulsions Generated with a New Laser-Assisted Device DOI: 10.3390/molecules25071729 -
N-O bond zaupanje 1,0
“cm-1, (-2291.54eV), (-10569.73 molecule electronic energy vibration at 1372 N-O symmetric stretch at 1289 cm-1, cm-1 eV), core-core repulsion energy (8278.19eV), cosmo C-N stretch at 1128 and C-O stretch at”
Experimental and computational chemistry studies on the inhibition of aluminium and mild steel in 0. DOI: 10.1080/16583655.2018.1500514 -
C c single bond zaupanje 1,0
“characteristic peaks for methoxy groups are seen at around 1250 and C-C-Cinplanebend 147 599.2496 578.9 22.4 1050cm(cid:1)1.Thecorrespondingpeaksarecomputedat1289,1286,1281, C-C-Cinplanebend 148 590.8451 570.8 126.6 1268, 1257.8, 1257.7, 12”
Computational and spectral studies of 3,3'-(propane-1,3-diyl)bis(7,8-dimethoxy-1,3,4,5-tetrahydro-2H-benzo[d]azepin-2-one) DOI: 10.1016/j.heliyon.2019.e02420 -
C n single bond zaupanje 0,9
“Explicit assignment: 'stretching vibration of C-N bond'”
Electrochemical Sensor Based on Thioether Oligomer Poly(N-vinylpyrrolidone)-modified Gold Electrode for Bisphenol A Detection DOI: 10.1002/elan.201900060 -
zaupanje 0,9
“Explicit assignment: 'The 1289 two independent saccharinate anions acting as biden- band (1293 in the Pb(II) salt) is -N-(C=O)-'”
Echeverria 等 - 2017 - Structural and IRspectroscopic characterization DOI: 10.1515/znb-2017-0116
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.