Hydroxyl (O-H) — FTIR-absorptions-toppe og tildelinger
Dette er de karakteristiske FTIR-bølgetal, hvor Hydroxyl (O-H) har tendens til at absorbere, samlet fra publiceret litteratur og rangeret efter understøttende bevis. Hver tildeling kan spores til en kilde (DOI) og krydsvalideres mod vores 130.000+ referencespektre og vidensgraf.
Backed by 8 cited sources
Hurtigt svar
Hydroxyl (O-H) tildeles normalt ved at lede efter en tilbagevendende klynge af karakteristiske toppe frem for et præcist lærebogsnummer. Tabellen nedenfor viser, hvor litteraturen oftest placerer denne gruppe i FTIR, rangeret efter akkumuleret evidens.
Karakteristiske FTIR-toppe for Hydroxyl (O-H)
| Bølgetal (cm⁻¹) | Understøttende fakta | Citerede kilder | Højeste tillid |
|---|---|---|---|
| 3400 | 325 | 294 | 1,0 |
| 3300 | 173 | 165 | 1,0 |
| 3500 | 151 | 142 | 1,0 |
| 3000 | 109 | 102 | 1,0 |
| 3600 | 104 | 96 | 1,0 |
| 3450 | 91 | 84 | 1,0 |
| 1640 | 83 | 76 | 1,0 |
| 3200 | 74 | 59 | 1,0 |
| 3430 | 55 | 52 | 1,0 |
| 3440 | 55 | 50 | 1,0 |
| 3350 | 54 | 51 | 1,0 |
| 1630 | 48 | 44 | 1,0 |
| 3420 | 45 | 44 | 1,0 |
| 3700 | 42 | 36 | 1,0 |
| 1600 | 41 | 34 | 1,0 |
| 1635 | 38 | 36 | 1,0 |
| 3340 | 37 | 36 | 1,0 |
| 3425 | 36 | 33 | 1,0 |
| 1650 | 36 | 33 | 1,0 |
| 3100 | 36 | 29 | 1,0 |
| 2900 | 34 | 31 | 1,0 |
| 3620 | 32 | 26 | 1,0 |
| 3410 | 30 | 29 | 1,0 |
| 3250 | 30 | 28 | 1,0 |
| 3448 | 30 | 28 | 1,0 |
| 1000 | 29 | 26 | 1,0 |
| 3550 | 29 | 25 | 1,0 |
| 1620 | 29 | 24 | 1,0 |
| 3436 | 28 | 28 | 1,0 |
| 3421 | 27 | 27 | 1,0 |
Viser de 30 bedst understøttede toppe ud af 1938 i alt for Hydroxyl (O-H).
Mulige materialer
Spektrumlogik
En funktionel gruppetildeling bliver mere sikker, når flere forventede bånd optræder sammen. Brug denne side til at finde de bedst understøttede peaks, og bekræft derefter, at den samme prøve udviser et sammenhængende mønster snarere end et enkelt isoleret hit.
Anvendelse i virkeligheden
Disse sider er nyttige til analyse af ukendte materialer, topforklaring i rapporter, polymerfejlfinding og verifikation af, om en kandidatmaterialefamilie er kemisk plausibel.
Almindelige fejl
- Brug af én funktionel-gruppe-side som en komplet materialebedømmelse uden at kontrollere resten af spektret.
- Antager, at det stærkeste bånd altid er det mest diagnostiske.
- At glemme, at forarbejdning, tilsætningsstoffer, ældning og blandinger kan flytte eller udvide forventede toppe.
Verifikationsrådgivning
Brug DSC, GC-MS eller TGA, når flere materialefamilier deler lignende bånd, eller når blandings-effekter gør FTIR-tildelingen usikker.
Litteratur bag disse tildelinger
-
731 cm⁻¹ tillid 1,0
“Unassociated hydroxyl peaks at 731 and 653 in Raman occurred in the compound”
Arjunan 等 - 2012 - Quantum chemical studies and vibrational analysis DOI: 10.1016/j.saa.2012.08.053 -
1625 cm⁻¹ tillid 1,0
“The peak at 1625 in BC was due to OH Quetiapine fumarate at different pH's.”
Arikibe 等 - 2019 - pH-Responsive Studies of Bacterial CelluloseChito DOI: 10.1002/slct.201902290 -
3429 cm⁻¹ tillid 1,0
“LLM confirmed rule peak-group candidate”
Arizka 等 - 2019 - Synthesis and Physical Properties Characterization DOI: 10.1088/1757-899X/546/4/042004 -
2925 cm⁻¹ tillid 1,0
“The and near 2925cm-1 due to vibration of O-H and Cfucoidan standard has eight peaks the same as the H.”
Artemisia 等 - 2019 - The Properties of Brown Marine Algae Sargassum tur DOI: 10.14499/indonesianjpharm30iss1pp43 -
3409 cm⁻¹ tillid 1,0
“The FTIR bands observed at 3409 and 1621 are due to the O-H stretching mode of hydroxyl group.”
Synthesis and Characterization of Spindle-Like TiO2 Nanostructures and Photocatalytic Activity on Methyl Orange and Methyl Blue Dyes Under Sunlight Radiation DOI: 10.1007/s10876-017-1245-6 -
3426 cm⁻¹ tillid 1,0
“peak in absorption of 3425.6 which showed the 1033.8 While the variation of PA-2 and PA-5 presence of OH bonds.”
Aritonang 等 - 2019 - Grafting of Oleic Acid On Cyclic Natural Rubber Re DOI: 10.13005/ojc/350119 -
2925 cm⁻¹ tillid 1,0
“Two distinctive signals are known as cm-1 functional groups in chitosan molecule including a broad signal at 3415 and a stretching cm-1, cm-1 signal at 2925 which are assigned to existing OH and NH.”
Mentha piperita essential oils loaded in a chitosan nanogel with inhibitory effect on biofilm formation against S. mutans on the dental surface DOI: 10.1016/j.carbpol.2019.02.018 -
3333 cm⁻¹ tillid 1,0
“The hydrolytic degradation of PVA nanofibers in the exposure of phosphate buffer solution (PBS) was confirmed by cm21 ATR-FTIR results in which a change at the intensity of the characteristic peak located at 3333 corresponding to hydroxyl g”
Askari 等 - 2016 - Three-layered electrospun PVAPCLPVA nanofibrous DOI: 10.1002/app.43309
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