N c o — FTIR-absorptions-toppe og tildelinger
Dette er de karakteristiske FTIR-bølgetal, hvor N c o 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
N c o 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 N c o
| Bølgetal (cm⁻¹) | Understøttende fakta | Citerede kilder | Højeste tillid |
|---|---|---|---|
| 2270 | 19 | 18 | 1,0 |
| 2260 | 4 | 4 | 1,0 |
| 2262 | 3 | 3 | 1,0 |
| 2272 | 2 | 2 | 1,0 |
| 2266 | 2 | 2 | 0,95 |
| 2360 | 1 | 1 | 1,0 |
| 1032 | 1 | 1 | 1,0 |
| 3287 | 1 | 1 | 1,0 |
| 473 | 1 | 1 | 1,0 |
| 2251 | 1 | 1 | 1,0 |
| 1159 | 1 | 1 | 1,0 |
| 2253 | 1 | 1 | 1,0 |
| 2273 | 1 | 1 | 1,0 |
| 2276 | 1 | 1 | 1,0 |
| 1634 | 1 | 1 | 1,0 |
| 2300 | 1 | 1 | 1,0 |
| 1180 | 1 | 1 | 1,0 |
| 2252 | 1 | 1 | 1,0 |
| 3436 | 1 | 1 | 1,0 |
| 1016 | 1 | 1 | 1,0 |
| 1106 | 1 | 1 | 1,0 |
| 1700 | 1 | 1 | 1,0 |
| 3330 | 1 | 1 | 1,0 |
| 1735 | 1 | 1 | 1,0 |
| 1628 | 1 | 1 | 1,0 |
| 3473 | 1 | 1 | 1,0 |
| 1285 | 1 | 1 | 1,0 |
| 1313 | 1 | 1 | 1,0 |
| 964 | 1 | 1 | 1,0 |
| 1730 | 1 | 1 | 1,0 |
Viser de 30 bedst understøttede toppe ud af 39 i alt for N c o.
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
-
2270 cm⁻¹ tillid 1,0
“troscopy is from the disappearance of the NCO peak at 2270 still observed even after 7 days of RT curing followed by 545 h 50◦C composition, time for complete cure, hard segment content curing at at 25% RH.”
Hydrogen bonding and thermomechanical properties of model polydimethylsiloxane based poly(urethane-urea) copolymers: Effect of hard segment content DOI: 10.1016/j.porgcoat.2015.06.015 -
2262 cm⁻¹ tillid 1,0
“LLM confirmed rule peak-group candidate”
Preparation of one-shot and two-shot method of semi-rigid polyurethane film based on functionalized liquid natural rubber DOI: 10.1063/1.5047200 -
3317 cm⁻¹ tillid 1,0
“peak at 3317 and disappearance of the NCO peak at 2295 The semirigid PU with low rubber polyol chain favored solubility in non-polar solvent (toluene and chloroform) and low polar solvent (THF).”
The behavior of semi-rigid polyurethane film based on functionalized rubber by one-shot and two-shot method preparation DOI: 10.1007/s10853-018-2578-8 -
2280 cm⁻¹ tillid 1,0
“LLM confirmed rule peak-group candidate”
Norshahli 等 - 2018 - Mechanical Properties of Palm Oil Polyol based Pol DOI: 10.1088/1742-6596/1082/1/012041 -
1730 cm⁻¹ tillid 1,0
“The formation of urea linkages at 1640 which occur increasing NCO/OH ratio, and its occurrences after 1730 cm-1 revealed that a high earlier as revealed by the 2D-COS study, suggests the significant side reactions between NCO/OH ratio induc”
Effects of NCO/OH Ratios on Bio-Based Polyurethane Film Properties Made from Acacia mangium Liquefied Wood DOI: 10.3390/polym15051154 -
964 cm⁻¹ tillid 1,0
“v3P-O and1-weekintraoralexposure.Thepeaksidentifiedwere:-OH (3500and1640cm(cid:2)1),-NH(3300-3100cm(cid:2)1),-CH 3/-CH 2-(2890, vibrations of amorphous Ca-P, and the peaks at 964 and 6101460cm(cid:2)1), (2052cm(cid:2)1), (1741cm(cid:2)1), 5”
Rahiotis 等 - 2008 - Characterization of oral films formed in the prese DOI: 10.1016/j.jdent.2008.01.005 -
1313 cm⁻¹ tillid 1,0
“amide III band (1313 which contains information C-N C-O N-H Based on this work, however, spectral analysis of the regarding the and stretching and the and cm-1”
Shi 等 - 2018 - Biochemical alterations of Candida albicans during DOI: 10.1039/c8an01452c -
1285 cm⁻¹ tillid 1,0
“The peaks at 1285 and 1078 are due to Ar-O = prepared with NCO/OH 2 are shown in Figure 3A and B, and R-O stretching, respectively, showing the presence of 1700 1720”
Shoaib 和 Bahadur - 2016 - Synthesis of thermally and mechanically improved p DOI: 10.1515/epoly-2016-0134
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