Acetyl — FTIR-absorptions-toppe og tildelinger
Dette er de karakteristiske FTIR-bølgetal, hvor Acetyl 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
Acetyl 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 Acetyl
| Bølgetal (cm⁻¹) | Understøttende fakta | Citerede kilder | Højeste tillid |
|---|---|---|---|
| 1730 | 9 | 9 | 1,0 |
| 1735 | 8 | 7 | 1,0 |
| 1740 | 6 | 6 | 1,0 |
| 1734 | 5 | 5 | 1,0 |
| 1737 | 3 | 3 | 1,0 |
| 1720 | 3 | 3 | 1,0 |
| 1739 | 3 | 3 | 1,0 |
| 1733 | 3 | 3 | 1,0 |
| 1240 | 3 | 3 | 1,0 |
| 1728 | 3 | 2 | 1,0 |
| 1633 | 3 | 2 | 1,0 |
| 1238 | 2 | 2 | 1,0 |
| 1738 | 2 | 2 | 1,0 |
| 1731 | 2 | 2 | 1,0 |
| 1234 | 2 | 2 | 1,0 |
| 1320 | 2 | 2 | 1,0 |
| 1727 | 2 | 1 | 1,0 |
| 1424 | 1 | 1 | 1,0 |
| 1579 | 1 | 1 | 1,0 |
| 1718 | 1 | 1 | 1,0 |
| 1375 | 1 | 1 | 1,0 |
| 1366 | 1 | 1 | 1,0 |
| 1729 | 1 | 1 | 1,0 |
| 1222 | 1 | 1 | 1,0 |
| 1420 | 1 | 1 | 1,0 |
| 1255 | 1 | 1 | 1,0 |
| 1408 | 1 | 1 | 1,0 |
| 1642 | 1 | 1 | 1,0 |
| 1736 | 1 | 1 | 1,0 |
| 1123 | 1 | 1 | 1,0 |
Viser de 30 bedst understøttede toppe ud af 73 i alt for Acetyl.
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
-
2886 cm⁻¹ tillid 1,0
“The peak component in the composite fibers, therefore the absorption intensity of modified wood pulp was appeared at cm-1 peak at 2886 and 1459 which corresponds to the cm-1 1746 due to grafting of acetyl groups.”
Awal 等 - 2012 - Thermal analysis and spectroscopic studies of elec DOI: 10.1007/s10973-011-1875-0 -
1089 cm⁻¹ tillid 1,0
“The sharp band at 1089 corresponds The PVA used in this work were obtained in powder form to C-O stretching of acetyl group present on the PVA back from M/s.”
Bhajantri 等 - 2006 - Microstructural studies on BaCl2 doped poly(vinyl DOI: 10.1016/j.polymer.2006.03.054 -
1030 cm⁻¹ tillid 1,0
“The band at 1518 is generally ascribed to cm-1 C-H bending vibration and the band at 1030 assigned to C-O stretching of acetyl groups present in PVA.”
Devi 等 - 2019 - Structural and optical studies on PVA capped SnS f DOI: 10.1088/1674-4926/40/5/052101 -
1730 cm⁻¹ tillid 1,0
“Hemicelluloses were the first to degrade as proved by the initial decrease cm-1 of the 1730 peak due to the breaking of acetyl groups in xylan.”
Esteves 等 - 2013 - CHEMICAL CHANGES OF HEAT TREATED PINE AND EUCALYPT DOI: 10.4067/S0718-221X2013005000020 -
3300 cm⁻¹ tillid 1,0
“It is possible (NS, LAS, and HAS), which can be confirmed by the that HAS sample has a more electronegative surface cm-1 peak at 3300 which is commonly attributed to than LAS sample, as more acetyl groups were incorstretching of -OH groups”
Felipe Tirado 等 - 2017 - EVALUATION OF THE COAGULANT CAPACITY OF STARCH OBT DOI: 10.20937/RICA.2017.33.esp01.11 -
1149 cm⁻¹ tillid 1,0
“At 1149.37 the sharp band was observed which corresponded to the C-O stretching of acetyl group present on the back bone of PVA.”
Gopinath 等 - 2023 - Mechanical, structural and optical properties of p DOI: 10.15251/JOR.2023.191.23 -
1435 cm⁻¹ tillid 1,0
“In contrast, the paramecompletely cm-1 introduction of acetyl groups weakens the formation of interand ters including peaks associated with the C O at 1733 and cm-1, hydrogen bonds and gives rise to the disruption of intramolecular 1435 and”
Synthesis, optimization and characterization of acetylated corn starch with the high degree of substitution DOI: 10.1016/j.ijbiomac.2013.04.080 -
1242 cm⁻¹ tillid 1,0
“cm-1 The peak at 1242 of raw spectrum was EFB The moisture content (2-5%) seems to be necessary for attributed to a waxy acetyl group of hemicellulose ester the best reaction.”
Jahi 等 - 2020 - Empty Fruit Bunch Cellulose based Sorbent for Oil DOI: 10.17576/jsm-2020-4909-29
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