Ester — FTIR-absorptions-toppe og tildelinger
Dette er de karakteristiske FTIR-bølgetal, hvor Ester har tendens til at absorbere, samlet fra offentliggjort litteratur og rangeret efter understøttende evidens. Hver tildeling kan spores til en kilde (DOI) og er krydsvalideret mod vores 320,000+ referencespektrer og vidensgraf.
Understøttet af 8 citerede kilder
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 | 110 | 97 | 1,0 |
| 1730 | 95 | 88 | 1,0 |
| 1735 | 77 | 75 | 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 | 38 | 1,0 |
| 1715 | 39 | 37 | 1,0 |
| 1640 | 36 | 34 | 1,0 |
| 1741 | 34 | 34 | 1,0 |
| 1630 | 34 | 32 | 1,0 |
| 1744 | 33 | 31 | 1,0 |
| 1725 | 32 | 29 | 1,0 |
| 1736 | 31 | 30 | 1,0 |
| 1600 | 30 | 29 | 1,0 |
| 1710 | 30 | 24 | 1,0 |
| 1738 | 29 | 29 | 1,0 |
| 1660 | 27 | 23 | 1,0 |
| 1732 | 26 | 24 | 1,0 |
| 1733 | 26 | 24 | 1,0 |
| 1728 | 26 | 23 | 1,0 |
| 1739 | 25 | 22 | 1,0 |
| 1726 | 24 | 24 | 1,0 |
| 1734 | 24 | 23 | 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 976 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.”
Synthesis and Physical Properties Characterization of Montmorillonite-modified Carbon Nanotubes Filler DOI: 10.1088/1757-899X/546/4/042004 -
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.”
Grafting of Oleic Acid On Cyclic Natural Rubber Resiprene-35 Using Dicumyl Peroxide Initiator and Divinylbenzene Compatibilizers For Paint Binder In Polyamide Thermoplastics DOI: 10.13005/ojc/350119 -
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 -
1723 cm⁻¹ tillid 1,0
“The characteristics sharp peak at 1723 is attributed to stretching vibration of carbonyl (-C=O) group from GMSG/VMSG [46, 47], the intensity of which increases with the increase of GMSG/VMSG contents in the membrane”
Novel Silica Functionalized Monosodium Glutamate/PVA Cross-linked Membranes for Alkali Recovery by Diffusion Dialysis DOI: 10.21203/rs.3.rs-283846/v1 -
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”
Three‐layered electrospun PVA/PCL/PVA nanofibrous mats containing tetracycline hydrochloride and phenytoin sodium: A case study on sustained control release, antibacterial, and cell culture properties 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.”
Quantitative Investigations of Biodiesel Fuel Using Infrared Spectroscopy: An Instrumental Analysis Experiment for Undergraduate Chemistry Students DOI: 10.1021/ed101097n -
1445 cm⁻¹ tillid 1,0
“N-C=O stretching at 1445 Other absorption On the other hand, it can be seen from Fig.”
Determination of iprodione in agrochemicals by infrared and Raman spectrometry DOI: 10.1007/s00216-007-1152-z -
1629 cm⁻¹ tillid 1,0
“The peak at 2922 3 cm-1 CEPTE 1629 is due to asymmetric stretching vibration of C=O carbonyl groups [28,29].”
Investigation on impedance response and dielectric relaxation of Ni-Zn ferrites prepared by self-combustion technique DOI: 10.1016/j.jallcom.2017.02.241
Se Ester i dit eget spektrum
Upload dit FTIR-spektrum og få en fuld fortolkningsrapport — peak-tildelinger med litteraturhenvisninger, biblioteksmatch og en litteraturunderstøttet analyse — på få sekunder.