Nitrogen heterocycle — FTIR-absorptions-toppe og tildelinger

Hurtigt svar

Nitrogen heterocycle 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 Nitrogen heterocycle

Viser de 30 bedst understøttede toppe ud af 188 i alt for Nitrogen heterocycle.

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

• 1566 cm⁻¹ tillid 1,0

  “1566cm-1, R2 due to NH in-plane bending, triazine stretching In every case a, good linear fit was obtained with valand C-N stretching, respectively, [23] and so, these bands ues >0.999.”

  Armenta 等 - 2004 - Determination of cyromazine in pesticide commercia DOI: 10.1016/j.aca.2004.02.063
• 3604 cm⁻¹ tillid 1,0

  “lowertemperaturethanthatat3604cm-1.Thisindicatesthat AE/H-BEA measured by pyridine adsorption method 3682cm-1 the OH group showing the peak at has weaker 3604cm-1.”

  Atoguchi 和 Kanougi - 2004 - Phenol oxidation over alkaline earth metal ion exc DOI: 10.1016/j.molcata.2004.08.020
• 810 cm⁻¹ tillid 1,0

  “The structure of the g-C 3N can be considered as 4 4 810cm-1 peak at graphite-like single layers aligned each other along the hexagonal can be attributed to the s-triazine (C 3N 3) breathing 1326-1433cm-1 1500-1627cm-1 c-axis[18].Theweakdif”

  Solvothermal synthesis of the special shape (deformable) hollow g-C3N4 nanospheres DOI: 10.1016/j.matlet.2011.01.008
• 1542 cm⁻¹ tillid 1,0

  “cm-1 613 The typical peaks at 1542 and 1468 attributed for the fundamental vibration of cm-1 pyrrole ring.”

  Highly Biological Active Antibiofilm, Anticancer and Osteoblast Adhesion Efficacy from MWCNT/PPy/Pd nanocomposite DOI: 10.1016/j.apsusc.2017.10.142
• 1039 cm⁻¹ tillid 1,0

  “Besides, cm-1 H bond in pyrrole ring [18], and the peaks at 1039 tion of N all the nanocomposites of PPy/ZnO show the better charge storage cm-1 3and 1173 were related to SO ion doped in PPy [4].”

  Structural and electrochemical study of polypyrrole/ZnO nanocomposites coating on nickel sheet synthesized by electrochemical method DOI: 10.1016/j.synthmet.2012.12.013
• 2230 cm⁻¹ tillid 1,0

  “The FTIR Accepted 14 September 2009 cm(cid:2)1 disappeared showed, with the curing reactionprogressed, the characteristic peak of nitrile at 2230 Available online 20 September 2009 cm(cid:2)1 and triazine ring at 1360 while the characterist”

  Synthesis and thermal properties of bisphthalonitriles containing aromatic ether nitrile linkages DOI: 10.1016/j.polymdegradstab.2009.09.006
• 1421 cm⁻¹ tillid 1,0

  “20.16 (cid:4) (cid:4) (cid:4) 21, 22, and The peaks at 900, 1068, plane modes, Electrochemical polymerization and reduction were percm-1 1091, and 1121 can be assigned to pyrrole in-plane 0.05M 0.1M formed in acetonitrile containing thiophe”

  Kato 等 - 2007 - X-ray photoemission spectroscopy and Fourier trans DOI: 10.1116/1.2731347
• 813 cm⁻¹ tillid 1,0

  “cm-1, cm-1 the absorption peak of the triazine ring at 813 and the absorption peak of the stretching cm-1 vibration P-O at 1088 [33].”

  Liang 等 - 2020 - Thermal Kinetics of a Lignin-Based Flame Retardant DOI: 10.3390/polym12092123