What absorbs at 923 cm⁻¹ in an FTIR spectrum?
A band near 923 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
Возможные назначения функциональных групп
| Функциональная группа | Подтверждающие факты | Цитируемые источники | Максимальная достоверность |
|---|---|---|---|
| Alkyl C-H | 3 | 3 | 1,0 |
| Hydroxyl (O-H) | 2 | 2 | 1,0 |
| Secondary amine | 2 | 2 | 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 |
| Phosphate (PO4) | 1 | 1 | 1,0 |
| C n single bond | 1 | 1 | 1,0 |
| Amide | 1 | 1 | 1,0 |
| N h | 1 | 1 | 1,0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1,0 |
| Silicon nitrogen | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 1 | 1,0 |
| Carbonate | 1 | 1 | 1,0 |
Ранжирование отражает накопленные литературные данные, а не единственное авторитетное правило. Всегда проверяйте в контексте вашего образца.
Литература, лежащая в основе этих назначений
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Carbonate достоверность 1,0
“SO42(cid:2) 659.9 669.4 680.1 629.1 - - - - Due to bending vibration 715.7 713.5 720.8 720.8 714.1 715.0 713.3 715.7 - 877 874.3 874.2 874 874.7 874.3 874 878.6 Carbonate band 922.8 920.9 950.4 980.9 975.7 983.1 980.6 980.5 Peak shifts due”
Theoretical and experimental study of structures and properties of cement paste The nanostructural aspects of C–S–H DOI: 10.1016/j.jpcs.2011.05.001 -
достоверность 1,0
“cm-1 can be related to (iv) The prominent peak at 923 4.3 Interpretation of the Crystallization Behavior Si-O stretching with nonbridging oxygens and the of Hench's Bioglass and Related Substituted Glasses sharing of asymmetric stretching m”
El-Batal 等 - 2018 - Studies of Bone-Bonding Ability and Antibacterial DOI: 10.1007/s12633-017-9580-7 -
Carboxyl (COOH) достоверность 1,0
“1638.25cm-1 <1700cm-1 -COOH(C=OStretching) (Medium) cm-1 cm-1 <1700 (Medium) -COOH (C=O Stretching) 1638.25 1010.16cm-1 and922.53cm-1 ±1050cm-1 -COOH(C-OStretching)”
Validation of the Developed Zero-Order Infrared Spectrophotometry Method for Qualitative and Quantitative Analyses of Tranexamic Acid in Marketed Tablets DOI: 10.3390/molecules26226985 -
Alkyl C-H достоверность 1,0
“The peaks at 923 and 3.1 Film formation mechanism 1091-1 corresponds to the C-H symmetric stretching and C-H deformation vibrations, respectively.”
Thakur 和 Lokhande - 2017 - Effect of dip time on the electrochemical behavior DOI: 10.1515/epoly-2016-0160 -
Silicon nitrogen достоверность 1,0
“2.0 10.4 (3) Si-N stretching 923 983 - - sin3 9.2”
Ay 和 Aydinli - 2004 - Comparative investigation of hydrogen bonding in s DOI: 10.1016/j.optmat.2003.12.004 -
N h достоверность 1,0
“The weak band at 923 can be cm(cid:2)1, ascribed to the NH twisting, followed by a weak band at 889 which is related 3 cm(cid:2)1 to the ring deformation.”
Synthesis, crystal structure, and characterization of cyclohexylammonium tetraisothiocyanatocobaltate(II): A single-source precursor for cobalt sulfide and oxide nanostructures DOI: 10.1016/j.heliyon.2019. -
достоверность 1,0
“bond is observed near 430 cm cm-1 The band at 923 is due to the vibration modes of non-bridging oxygen's in alumino-”
Kumar 等 - 2022 - Synthesis and characterization of cordierite and c DOI: 10.15251/JOR.2022.184.609 -
Amide достоверность 1,0
“polysaccharides(e.g.,glucose) DNAandRNAribose-phosphatechain C-N+-Cstretching 923 vibrationofRNA PhosphodiestergroupsofPO21121 RNA”
Fourier-Transform Infrared Spectroscopy as a Discriminatory Tool for Myotonic Dystrophy Type 1 Metabolism: A Pilot Study DOI: 10.3390/ijerph18073800
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