What absorbs at 445 cm⁻¹ in an FTIR spectrum?
A band near 445 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
تعيينات المجموعات الوظيفية المحتملة
| مجموعة وظيفية | حقائق داعمة | المصادر المستشهد بها | أعلى ثقة |
|---|---|---|---|
| Metal oxygen | 4 | 4 | 1,0 |
| Silicon-oxygen (Si-O) | 3 | 3 | 1,0 |
| Silicon (Si) | 2 | 2 | 1,0 |
| Methoxy (OCH3) | 2 | 2 | 1,0 |
| Methacrylate | 2 | 2 | 1,0 |
| C-O single bond | 2 | 2 | 1,0 |
| Acetate | 2 | 2 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| Silicate | 1 | 1 | 1,0 |
| Ester | 1 | 1 | 1,0 |
| Phosphate (PO4) | 1 | 1 | 1,0 |
| Carbonyl (C=O) | 1 | 1 | 1,0 |
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الأدبيات وراء هذه التعيينات
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Carbonyl (C=O) الثقة 1,0
“443 The FTIR results for the black paint confirmed the presence of the characteristic absorption 444 peaks of an alkyd paint, dominated by the sharp and intense absorptions at 1720 and 1256 445 cm-1, due to the stretching mode of the carbon”
Catto 等 - 2021 - Bioremoval of graffiti using novel commercial stra DOI: 10.1111/j.1574-6941.2006.00028.x -
Phosphate (PO4) الثقة 1,0
“Therefore, in the obtained Raman spectra the presence of the phosphate group is highlighted by the vibrational bands at around 445 and 432 cm-1 that could be attributed 𝜈 to (PO43-) bending mode.”
Development of Silver Doped Hydroxyapatite Thin Films for Biomedical Applications DOI: 10.3390/coatings12030341 -
الثقة 1,0
“445 asymmetric stretching vibration of the Si-O-T group between 991 and 977 446 Furthermore, when these bands are compared to the same band in the infrared spectra 447 of the precursors, MK and SSA, there is a shift of this band to a lower”
Istuque 等 - 2019 - Effect of sewage sludge ash on mechanical and micr DOI: 10.1016/j.conbuildmat.2019.01.093 -
الثقة 1,0
“The IR spectrum of pure ZnO particles cm-1 (Figure 5a) showed two characteristic peaks: a broad and very weak peak at 3431 (Figure 5a) showed two characteristic peaks: a broad and very weak peak at 3431 cm-1 correcorresponding to the O-H st”
Deposition of Zinc Oxide Coatings on Wood Surfaces Using the Solution Precursor Plasma Spraying Process DOI: 10.3390/coatings11020183 -
Ester الثقة 1,0
“a group of bands at 1238, 1163, 1114 and 1099 obtained from the 445 cm-1 ester groups stretching vibrations (-C-O);”
Kharbach 等 - 2021 - New insights into the Argan oil categories charact DOI: 10.1016/j.talanta.2020.122073 -
Metal oxygen الثقة 1,0
“The two strong bands at 445 and 610 are attributed to the O-Ti-O bending vibration and asymmetric Ti-O stretching vibration, respectively.”
In Situ High-Pressure Raman Spectroscopic, Single-Crystal X-ray Diffraction, and FTIR Investigations of Rutile and TiO2II DOI: 10.3390/min13050703 -
Silicon (Si) الثقة 1,0
“cm-1 cm-1 υ2-type Two peaks at about 445 and 483 associated with internal deformaTwo peaks at about 445 cm-1 and 483 cm-1 associated with υ2-type internal υ4-type tions (O non-Si-O vibrations) and asymmetric bending (ASB) vibrations deforma”
Madadi 和 Wei - 2022 - Characterization of Calcium Silicate Hydrate Gels DOI: 10.3390/gels8020075 -
الثقة 1,0
“These DTG curves also presented peaks 445 related to the formation of hydrated calcium silicates and calcium aluminates.”
Moraes 等 - 2019 - Production of bamboo leaf ash by auto-combustion f DOI: 10.1016/j.conbuildmat.2019.03.007
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