What absorbs at 485 cm⁻¹ in an FTIR spectrum?
A band near 485 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
Possible functional-group assignments
| Functional group | Supporting facts | Cited sources | Top confidence |
|---|---|---|---|
| Metal oxygen | 6 | 6 | 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 |
| Hydrogen bond | 1 | 1 | 1.0 |
| Carboxyl (COOH) | 1 | 1 | 1.0 |
| Metal oxo | 1 | 1 | 1.0 |
Ranking reflects accumulated literature evidence, not a single authoritative rule. Always confirm against your sample context.
Literature behind these assignments
-
confidence 1.0
“The FTIR spectra results show (Figure 6) that the absorption peaks at cm-1 485, 519, and 633 are attributed to the Al-O structural vibration and are characteristic peaks of Al 2O 3, consistent with the standard infrared peaks of corundum [1”
Study on Gemological Characteristics of Blue Sapphires from Baw-Mar Mine, Mogok, Myanmar DOI: 10.3390/cryst11111275 -
Metal oxygen confidence 1.0
“The peak at 485 corresponds to the bending vibration of V-O-V [20].”
Saravanakumar 等 - 2018 - Role of NaOH concentration on synthesis and charac DOI: 10.1063/1.5047993 -
Metal oxygen confidence 1.0
“Earlier workers have reported the presence of Table 3) which almost matched with the data recorded by cm-1 cm-1 Zn-O 400-500 theDebye-Scherrerprocess.Table4demonstratestherelation the band at 485 [58], 442 [59],”
Udhayan 等 - 2021 - Evaluation of Bioactive Potential of a Tragia invo DOI: 10.1007/s12668-021-00864-z -
Metal oxygen confidence 1.0
“Hence, the relative intensity of TiOH(948cm-1),Ti-O-Ti band(485cm-1)”
Wan 等 - 2006 - Structure and thermal properties of titanium dioxi DOI: 10.1007/s00289-006-0506-6 -
Metal oxygen confidence 1.0
“Zn-O stretching vibrations are shifted to 495 cm-1 from 485 cm-1 with the addition of Cu-O Peak at 485”
Successive Photocatalytic Degradation of Methylene Blue by ZnO, CuO and ZnO/CuO Synthesized from Coriandrum sativum Plant Extract via Green Synthesis Technique DOI: 10.3390/cryst13020281 -
Metal oxygen confidence 1.0
“2 cm-1 300 (cid:3)C a wide band at 400-500 with maximum at and 500 (cid:3)C almost a plateau in sample mass can be cm-1 about 485 specific to Cu-O vibrations [33] appears.”
Synthesis of anisotropic Cu2-xS-based nanostructures by thermal oxidation DOI: 10.1007/s10973-019-08622-w -
Acetate confidence 1.0
“501 νCdO νC-O available, by comparing the position of the bands with charactercoordinates, and the stretching mode, respec485 502 tively.41,73,77 istic bands of similar molecules.”
Lopes 等 - 2011 - Photochemistry and Vibrational Spectra of Matrix-I DOI: 10.1021/jp110705c -
Acetate confidence 1.0
“C-O-C likeamines,phenols,alcohols,saponins,carboxylic acids, gave rise to the peak at 485 Antifungal and cytotoxic activities of AgNPs Fourier-transform Si-AgNPs.”
Rizwana 等 - 2022 - Biosynthesis and characterization of silver nanopa DOI: 10.1515/gps-2022-0048
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