Carboxyl (COOH) — FTIR-absorptions-toppe og tildelinger
Dette er de karakteristiske FTIR-bølgetal, hvor Carboxyl (COOH) 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
Carboxyl (COOH) 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 Carboxyl (COOH)
| Bølgetal (cm⁻¹) | Understøttende fakta | Citerede kilder | Højeste tillid |
|---|---|---|---|
| 1700 | 96 | 86 | 1,0 |
| 1730 | 92 | 85 | 1,0 |
| 1740 | 92 | 84 | 1,0 |
| 1720 | 82 | 75 | 1,0 |
| 1735 | 68 | 66 | 1,0 |
| 1650 | 65 | 62 | 1,0 |
| 1710 | 55 | 45 | 1,0 |
| 1600 | 48 | 46 | 1,0 |
| 1750 | 45 | 42 | 1,0 |
| 1715 | 44 | 41 | 1,0 |
| 1640 | 44 | 41 | 1,0 |
| 1630 | 42 | 37 | 1,0 |
| 1725 | 35 | 33 | 1,0 |
| 1400 | 35 | 30 | 1,0 |
| 1743 | 33 | 33 | 1,0 |
| 1745 | 32 | 28 | 1,0 |
| 1744 | 30 | 29 | 1,0 |
| 1660 | 29 | 25 | 1,0 |
| 1741 | 28 | 28 | 1,0 |
| 1736 | 28 | 26 | 1,0 |
| 1734 | 27 | 26 | 1,0 |
| 1722 | 26 | 25 | 1,0 |
| 1636 | 26 | 24 | 1,0 |
| 1737 | 26 | 23 | 1,0 |
| 1655 | 25 | 24 | 1,0 |
| 1638 | 25 | 23 | 1,0 |
| 1732 | 25 | 22 | 1,0 |
| 1560 | 24 | 24 | 1,0 |
| 1733 | 24 | 22 | 1,0 |
| 1540 | 24 | 21 | 1,0 |
Viser de 30 bedst understøttede toppe ud af 1244 i alt for Carboxyl (COOH).
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 -
945 cm⁻¹ tillid 1,0
“CdO cm-1, the band in the ester group at 1751 that of 1700 cm-1 CdO cm-1 On the other hand, the Acesulfame-K band at 945 does due to the stretch in carboxylic acids, and the band CdO cm-1 not overlap with any Aspartame band, but the low sig”
Armenta 等 - 2004 - FTIR determination of aspartame and acesulfame-k i DOI: 10.1021/jf049218l -
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 -
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 -
1554 cm⁻¹ tillid 1,0
“While in cobalt stearate, the absorption peak at wave number of 1554 cm-1indicate the presence of asymmetric vibrations of carboxylate groups absorption peak at the wave numbers of 3000”
Synthesis of cobalt stearate as oxidant additive for oxo-biodegradable polyethylene DOI: 10.1063/1.4930711 -
1302 cm⁻¹ tillid 1,0
“cm-1 cm-1, characteristic peaks at 1302 and 1416 which correspond to vibrational modes 3-) (COO-) of nitrate (NO and acetate ions [50,51].”
Sol-Gel Synthesized High Entropy Metal Oxides as High-Performance Catalysts for Electrochemical Water Oxidation DOI: 10.3390/molecules27185951 -
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
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