What absorbs at 1128 cm⁻¹ in an FTIR spectrum?
A band near 1128 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
تعيينات المجموعات الوظيفية المحتملة
| مجموعة وظيفية | حقائق داعمة | المصادر المستشهد بها | أعلى ثقة |
|---|---|---|---|
| Alkyl C-H | 2 | 2 | 1,0 |
| Alkene (C=C) | 1 | 1 | 1,0 |
| Metal oxygen | 1 | 1 | 1,0 |
| Carboxyl (COOH) | 1 | 0 | 1,0 |
يعكس الترتيب الأدلة الأدبية المتراكمة، وليس قاعدة واحدة موثوقة. تأكد دائمًا من سياق عينتك.
الأدبيات وراء هذه التعيينات
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Alkyl C-H الثقة 1,0
“The FTIR spectroscopy study of neat PLA having various functional groups C=O al cm-1), cm-1), stretching vibrations (~ 1749 asymmetric C-O-C stretching (1180 symmetric and cm-1), cm-1), asymmetric -CH vibrations (1128 and 1042 C-OH side gro”
Ghosh 等 - 2020 - Blown films fabrication of poly lactic acid based DOI: 10.1016/j.mtcomm.2019.100737 -
الثقة 1,0
“1043cm(cid:2)1 ance of peaks at 1128, 1080, and may correspond to 2 (degrees) CAO stretching vibrations (Pamula et al., 2001).”
Molinaro 等 - 2013 - Effect of nanoclay-type and PLA optical purity on DOI: 10.1016/j.jfoodeng.2013.01.021 -
Metal oxygen الثقة 1,0
“1039 correspond to the vibrations of the Ti-O-C of the butoxy groups bonded directly to the cm-1 cm-1) Interestingly, these bands (1128 and 1039 present a significant variation in their intensity ratios cm-1 when both systems are compared.”
Synthesis of vacancy-rich titania particles suitable for the additive manufacturing of ceramics DOI: 10.1038/s41598-022-19824-y -
Alkene (C=C) الثقة 1,0
“In Figure 2a, Polymers2023,15,3312 4of14 the weak absorption peaks at 1652 cm-1 and 1594-1430 cm-1 correspond to the stretching vibrations of the C=C bond on the vinyl and phenyl groups, and the absorption peaks at 1128 and 1043 cm-1 repres”
Enhancing Char Formation and Flame Retardancy of Ethylene-Vinyl Acetate Copolymer (EVA)/Aluminum Hydroxide (ATH) Composites by Grafting Ladder Phenyl/Vinyl Polysilsesquioxane (PhVPOSS) DOI: 10.3390/polym15153312 -
الثقة 1,0
“This vibrational band at 1128 cm-1 decreased with decreased K2O/SiO2 ratio due to the 2 of octahedral Al to tetrahedral Al and the formation of Si-O-Al as Al combined with Si-O-Si [20].”
Insights into the Microstructure of Hydrothermal Synthesized Nanoscale K2O-Al2O3-SiO2-H2O Particles DOI: 10.3390/nano10010063 -
Alkyl C-H الثقة 1,0
“The bands at Nanomaterials 2015, 5 1128 cm-1 cm-1 2918 and 2851 are assigned to -CH and C-H stretching, respectively.”
A Sustainable Approach to Fabricating Ag Nanoparticles/PVA Hybrid Nanofiber and Its Catalytic Activity DOI: 10.3390/nano5021124
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