Ester — FTIR-absorptions-toppe og tildelinger
Dette er de karakteristiske FTIR-bølgetal, hvor Ester 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
Ester 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 Ester
| Bølgetal (cm⁻¹) | Understøttende fakta | Citerede kilder | Højeste tillid |
|---|---|---|---|
| 1740 | 108 | 97 | 1,0 |
| 1730 | 97 | 90 | 1,0 |
| 1735 | 78 | 76 | 1,0 |
| 1720 | 75 | 70 | 1,0 |
| 1700 | 69 | 64 | 1,0 |
| 1745 | 53 | 49 | 1,0 |
| 1650 | 52 | 50 | 1,0 |
| 1750 | 48 | 44 | 1,0 |
| 1743 | 40 | 39 | 1,0 |
| 1715 | 39 | 37 | 1,0 |
| 1640 | 36 | 34 | 1,0 |
| 1741 | 34 | 34 | 1,0 |
| 1630 | 34 | 32 | 1,0 |
| 1725 | 33 | 30 | 1,0 |
| 1744 | 32 | 30 | 1,0 |
| 1736 | 31 | 30 | 1,0 |
| 1600 | 30 | 29 | 1,0 |
| 1710 | 30 | 24 | 1,0 |
| 1738 | 28 | 28 | 1,0 |
| 1660 | 27 | 23 | 1,0 |
| 1734 | 26 | 25 | 1,0 |
| 1732 | 26 | 24 | 1,0 |
| 1733 | 26 | 24 | 1,0 |
| 1728 | 26 | 23 | 1,0 |
| 1726 | 25 | 25 | 1,0 |
| 1739 | 25 | 22 | 1,0 |
| 1737 | 23 | 21 | 1,0 |
| 1637 | 22 | 22 | 1,0 |
| 1722 | 22 | 20 | 1,0 |
| 1724 | 21 | 20 | 1,0 |
Viser de 30 bedst understøttede toppe ud af 980 i alt for Ester.
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
-
1735 cm⁻¹ tillid 1,0
“The new peak appears cm-1 at 1735 which indicates the presence of a C=O bond from carboxylic acid.”
Arizka 等 - 2019 - Synthesis and Physical Properties Characterization DOI: 10.1088/1757-899X/546/4/042004 -
1715 cm⁻¹ tillid 1,0
“are assigned to ester pectin polymer chains and the methyl group of the methyl ester The bands at 1715 and 1632 -COO(cid:0) CO-CH3”
Optimization of citron peel pectin and glycerol concentration in the production of edible film using response surface methodology DOI: 10.1016/j.heliyon.2023.e13724 -
1713 cm⁻¹ tillid 1,0
“This means that the addition shows sharp absorption and low intensity at 1712.8 cm-1 of DVB is able to shift the hydroxyl bonds in blends, which indicates the presence of C=O carbonyl so that DVB makes the blends more compatible.”
Aritonang 等 - 2019 - Grafting of Oleic Acid On Cyclic Natural Rubber Re DOI: 10.13005/ojc/350119 -
1723 cm⁻¹ tillid 1,0
“The other cm21 longed TC-HCl release, PHT-Na release behavior revealed that it peaks such as 1723 and 2941 corresponding to ester and can help the wound dressings to heal the wounds during 24 h carbon-hydrogen bonds in the chemical structur”
Askari 等 - 2016 - Three-layered electrospun PVAPCLPVA nanofibrous DOI: 10.1002/app.43309 -
1746 cm⁻¹ tillid 1,0
“CO diesel is monitored by the ester stretch (1746 The impact of water on the precision of the biodiesel mixture is determined using a Karl Fischer titration to monitor water content.”
Ault 和 Pomeroy - 2012 - Quantitative Investigations of Biodiesel Fuel Usin DOI: 10.1021/ed101097n -
3275 cm⁻¹ tillid 1,0
“The two prominent peaks at 3275.13 and 1635.54 are typical of N-H bond of amines and C=C stretch of alkenes or C=O stretch of amides [42] respectively.”
Biomedical Applications of Cocoa Bean Extract-Mediated Silver Nanoparticles as Antimicrobial, Larvicidal and Anticoagulant Agents DOI: 10.1007/s10876-016-1055-2 -
3401 cm⁻¹ tillid 1,0
“Obvious Fourier transform infrared cm-1, cm-1, (FTIR) spectra for the GT extract were observed, showing absorption bands at 3401 1628 cm-1, and 1029 corresponding to O-H/N-H, C=O, and C-O groups, respectively.”
Aziz 等 - 2017 - From Insulating PMMA Polymer to Conjugated Double DOI: 10.3390/polym9110626 -
1730 cm⁻¹ tillid 1,0
“cm-1 The peak at 1730 was assigned to C=O stretching from unconjugated ketone, carbonyl, and origin63.”
Physicochemical characterisation of barley straw treated with sodium hydroxide or urea and its digestibility and in vitro fermentability in ruminants DOI: 10.1038/s41598-022-24738-w
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