What absorbs at 505 cm⁻¹ in an FTIR spectrum?
A band near 505 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
Mabilis na sagot
A band near 505 cm⁻¹ is usually interpreted by checking which functional groups repeatedly co-occur there in the literature, then confirming at least one or two additional peaks in the same sample. This page ranks those assignments by accumulated evidence rather than by a single fixed textbook rule.
Mga posibleng pagtatalaga ng functional-group
| Grupong functional | Mga sumusuportang katotohanan | Mga nasiping sanggunian | Pinakamataas na kumpiyansa |
|---|---|---|---|
| Metal oxygen | 4 | 4 | 1.0 |
| Alkyl C-H | 2 | 2 | 1.0 |
| Carboxyl (COOH) | 2 | 2 | 1.0 |
| Siloxane (Si-O-Si) | 1 | 1 | 1.0 |
| Silicon-oxygen (Si-O) | 1 | 1 | 1.0 |
| Methoxy (OCH3) | 1 | 1 | 1.0 |
| Hydroxyl (O-H) | 1 | 1 | 1.0 |
| C-O single bond | 1 | 1 | 1.0 |
| Methacrylate | 1 | 1 | 1.0 |
| Ketone | 1 | 1 | 1.0 |
| Ester | 1 | 1 | 1.0 |
| Carbonyl (C=O) | 1 | 1 | 1.0 |
| Amide | 1 | 1 | 1.0 |
| Acetate | 1 | 1 | 1.0 |
| Aromatic ring | 1 | 1 | 1.0 |
Ang pagraranggo ay sumasalamin sa naipon na ebidensya ng literatura, hindi isang solong awtoritatibong tuntunin. Palaging kumpirmahin laban sa konteksto ng iyong sample.
Mga posibleng materyales
| Materyal | Sumusuportang mga peak | Mga overlapping na grupo | Mga nasiping sanggunian |
|---|---|---|---|
| CuO | 505, 453, 1000 | Metal oxygen, Carboxyl (COOH) | 1 |
| TiO2 | 505, 1700, 1093 | Metal oxygen, Alkyl C-H, Carboxyl (COOH) | 1 |
Ang mga materyales ay ipinapakita lamang kapag ang parehong literatura pool ay sumusuporta sa banda na ito at hindi bababa sa isang karagdagang katangian na tuktok.
Logic ng spectrum
This band becomes meaningful only when read with its neighboring peaks. In practice, analysts first look at the assignments above, then check whether the same sample also shows other peaks expected for the same structural motif. A lone band near 505 cm⁻¹ is usually not enough for material identification by itself.
Paggamit sa totoong mundo
Ang uri ng query na ito ay karaniwan sa pagtukoy ng polymer, screening ng hindi kilalang plastic, pag-troubleshoot ng QC, pag-verify ng recycled na materyal, at pagsusuri ng pagtatalaga ng peak na may suporta ng literatura.
Mga karaniwang pagkakamali
- Pagtrato sa isang nakahiwalay na banda bilang patunay ng isang materyal nang hindi sinusuri ang hindi bababa sa isa o dalawang sumusuportang peak.
- Hindi pinapansin ang overlap: maraming functional group ang maaaring mag-ambag malapit sa parehong wavenumber.
- Pag-laktaw sa pagpapatunay kapag ang mga additives, blends, oxidation, o contamination ay maaaring mag-distort ng spectrum.
Payo sa pagpapatunay
Kapag nananatili ang kalabuan, patunayan ang hypothesis gamit ang DSC, GC-MS, o TGA, lalo na para sa mga blend, degraded na sample, at filled polymers.
Literatura sa likod ng mga pagtatalagang ito
-
Metal oxygen kumpiyansa 1.0
“LLM confirmed rule peak-group candidate”
Pascoal 等 - 2020 - Treatment by TiO2UV of wastewater generated in po DOI: 10.5004/dwt.2020.26390 -
Aromatic ring kumpiyansa 1.0
“nanocomposite shows that the origin of the vibrational bands is as FT-IR spectra of the Pani-TiO 2 cm-1 cm-1 follows: a band at 3454 is due to the NH stretching of aromatic amines, another at 2854 505cm-1 is due to aromatic CH-stretching, a”
Rajakani 和 Vedhi - 2013 - Synthesis and electrochemical studies of TiO2 - Pa DOI: 10.4028/www.scientific.net/AMR.678.263 -
Acetate kumpiyansa 1.0
“Therewere three drastic decrement intensity peaks of C=O, C-OH, and C-O groups with the generation of new peaks at 576 cm-1, 505 cm-1 and 453 cm-1 corresponding to CuO stretching vibrations, that were explained by Gulati et al.”
Effect of rGO wt.% on the Preparation of rGO/CuO Nanocomposites at Different Test Periods and Temperatures DOI: 10.3390/cryst12101325 -
kumpiyansa 1.0
“The spectra of samples 100Zn0Co and 100Zn0Co-T contained a peak at 505 cm-1, which can be attributed to zinc oxide with oxygen”
Butova 等 - 2020 - Synthesis of ZnO Nanoparticles Doped with Cobalt U DOI: 10.3390/nano10071275 -
Metal oxygen kumpiyansa 1.0
“cm-1 551 in case of pure ZnO which corresponds to the Zn-O bond stretching 1 cm-1 1 vibration that shifted to about 505 for the polymeric hybrid [15].”
Elkady 等 - 2015 - Formulation of Nano-zinc Oxide into Biocomposite B DOI: 10.1063/1.4914227 -
Carboxyl (COOH) kumpiyansa 1.0
“The band at 505 could be assigned to CoO.”
Cobalt Oxide Catalysts in the Form of Thin Films Prepared by Magnetron Sputtering on Stainless-Steel Meshes: Performance in Ethanol Oxidation DOI: 10.3390/catal9100806 -
kumpiyansa 1.0
“bands at 1115 and 1025 can also indicate Si-O-Si cm-1 505 quartz bond and Si-O stretching of silicates/clays, and the 2515 peak could refer to thiol”
Mineral and chemical changes of sediments after Cu sorption and then desorption induced by synthetic root exudate DOI: 10.1016/j.chemosphere.2019.124393 -
Alkyl C-H kumpiyansa 1.0
“Si-O-Si 1257 0.422 0.505 cm-1) gle bending peak of C-H (1510 observed in the freshly Si-O 3643”
Khan 等 - 2021 - The Structural, Physical, and In Vitro Biological DOI: 10.14744/eej.2020.36349
May spectrum ka ba na may ganitong band?
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