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 8 cited sources
Gán nhóm chức có thể
| Nhóm chức | Sự kiện hỗ trợ | Nguồn tham khảo | Độ tin cậy cao nhất |
|---|---|---|---|
| C-O single bond | 7 | 5 | 1,0 |
| Methoxy (OCH3) | 5 | 4 | 1,0 |
| Methacrylate | 5 | 4 | 1,0 |
| Acetate | 5 | 4 | 1,0 |
| Alkyl C-H | 4 | 4 | 1,0 |
| Secondary amine | 2 | 2 | 1,0 |
| C n single bond | 2 | 2 | 1,0 |
| Amide | 2 | 2 | 1,0 |
| Silicon carbon | 1 | 1 | 1,0 |
| Aromatic ring | 1 | 1 | 1,0 |
| Methyl | 1 | 1 | 1,0 |
| Hydroxyl (O-H) | 1 | 1 | 1,0 |
| Alkene (C=C) | 1 | 1 | 1,0 |
| Metal oxygen | 1 | 1 | 1,0 |
| Phosphate (PO4) | 1 | 1 | 0,8 |
| Carboxyl (COOH) | 1 | 0 | 1,0 |
Xếp hạng phản ánh bằng chứng tài liệu tích lũy, không phải một quy tắc duy nhất có thẩm quyền. Luôn xác nhận với ngữ cảnh mẫu của bạn.
Tài liệu tham khảo đằng sau các gán này
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Alkyl C-H độ tin cậy 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 -
Acetate độ tin cậy 1,0
“The peak at 1128 cm-1 was associated to the stretching of the C-O A white oak barrel was purchased from artisan”
Mondragon-Cortez 等 - 2022 - Application of Fourier transform infrared spectros DOI: 10.24275/rmiq/Alim2806 -
độ tin cậy 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 độ tin cậy 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 -
Acetate độ tin cậy 1,0
“The bands at 1128 and 1170 are attributed to C-O and C-OH bending vibration and determine the proportion of the crystalline phase [48].”
High-Content Aloe vera Based Hydrogels: Physicochemical and Pharmaceutical Properties DOI: 10.3390/polym15051312 -
Acetate độ tin cậy 1,0
“cm-1 The vibration at 1128 from PVA is ascribed to the stretching of C-O from the crystalline The vibration at 1128 cm-1 from PVA is ascribed to the stretching of C-O from the crystalline region of the macromolecular chain where hydrogen bo”
Croitoru 等 - 2020 - Physically Crosslinked Poly (Vinyl Alcohol)Kappa- DOI: 10.3390/polym12030560 -
Acetate độ tin cậy 1,0
“3 cm-1, cm-1, 1454-1456 cm-1, CH3 rocking vibration assigned to 1128 cm-1, C-O-C stretching assigned to 1095-1098 vibration at 1454-1456 CH rocking vibration assigned to 1128 C-O-C stretching assigned 3 cm-1, cm-1,”
Impact of the Fused Deposition (FDM) Printing Process on Polylactic Acid (PLA) Chemistry and Structure DOI: 10.3390/app7060579 -
Amide độ tin cậy 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
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