What absorbs at 998 cm⁻¹ in an FTIR spectrum?
A band near 998 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
Attributions possibles de groupes fonctionnels
| Groupe fonctionnel | Faits à l＇appui | Sources citées | Confiance maximale |
|---|---|---|---|
| Alkyl C-H | 4 | 4 | 1,0 |
| Hydroxyl (O-H) | 4 | 4 | 1,0 |
| Silicon-oxygen (Si-O) | 4 | 4 | 1,0 |
| Amide | 3 | 3 | 1,0 |
| Silicon (Si) | 3 | 3 | 1,0 |
| Methacrylate | 2 | 2 | 1,0 |
| Acetate | 2 | 2 | 1,0 |
| Secondary amine | 2 | 2 | 1,0 |
| C n single bond | 2 | 2 | 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 |
| Hydrogen bond | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1,0 |
| Methoxy (OCH3) | 1 | 1 | 1,0 |
| C-O single bond | 1 | 1 | 1,0 |
| Silanol (Si-OH) | 1 | 1 | 1,0 |
| Ring structure | 1 | 1 | 1,0 |
Le classement reflète les preuves bibliographiques accumulées, et non une règle faisant autorité. Confirmez toujours dans le contexte de votre échantillon.
Bibliographie derrière ces attributions
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Alkyl C-H confiance 1,0
“The calculated using peaks of 998 and 973 cm1 C-CH involves the CH rocking, the stretching, the CH bending and the CH twisting -band at 998 3”
Chen 等 - 2015 - The spatial correlation between crystalline and am DOI: 10.1007/s10118-015-1613-3 -
Ring structure confiance 1,0
“Fourier transform infra-red (FTIR) analysis cm-1 confirm 3:Ce3+ cm-1 The FTIR spectra of CaSiO phosphor was recorded in the range 400 - 4000 to the functional groups presentintheobtainedsamples,Fig.2.FTIRspectrashowstrongtransmittancepeaksa”
Dhanu 等 - 2020 - Photoluminescence of mixed phase CaSiO3Ce3+ nanop DOI: 10.1016/j.ijleo.2020.165139 -
Acetate confiance 1,0
“FTIR analysis resulting in bands of C-O at 998 Ti-O-Ti at 506 and cm-1.”
Nurdiansah 等 - 2020 - Synthesis of ZnOrGOTiO2 Composite and Its Photoc DOI: 10.1088/1757-899X/833/1/012028 -
Amide confiance 1,0
“1), (1335cm-1),14 (998cm-1) 169 C-N stretching Si-O-Si stretching and Mg-N stretching (a small hump 435cm-1).”
Removal of hazardous pollutants from wastewater: Catalytic applications of Mg nanoparticle functionalized aminoclay DOI: 10.1016/j.molliq.2019.112005 -
Hydroxyl (O-H) confiance 1,0
“2 2 C-O 1168 stretching vibration O-H 998 bending vibration of hydroxymethyl C-N-H”
Cheng 等 - 2022 - Development of a High-Strength and Adhesive Polyac DOI: 10.1021/acsomega.1c06626 -
Silicon (Si) confiance 1,0
“The most inaction (Figure 3(b)), the morphology of the geopolymer is tensive band at 998 was due to Si-O-Al stretching vi757cm-1 constituted by a chain of polysilicate layers by the combration.”
El Alouani 等 - 2019 - Preparation, Characterization, and Application of DOI: 10.1155/2019/4212901 -
Hydrogen bond confiance 1,0
“The peak at 998 is attributed to intramolecular hydrogen bonding of hydroxyl groups or the water plasticizattributed to intramolecular hydrogen bonding of hydroxyl groups or the water plasticizing”
Morphology and Selected Properties of Modified Potato Thermoplastic Starch DOI: 10.3390/polym15071762 -
Alkyl C-H confiance 1,0
“Pure Materials Absorption Bands (cm-1) Bands Assignment (cm-1) Pure Materials Bands Assignment Absorption Bands βCD 998 C-H bending 1077 -S=O stretching βCD 998 C-H bending”
Effects of Cyclodextrins ( and ) and l-Arginine on Stability and Functional Properties of Mucoadhesive Buccal Films Loaded with Omeprazole for Pediatric Patients DOI: 10.3390/polym10020157
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