Phosphate (PO4) — FTIR-absorptions-toppe og tildelinger

Hurtigt svar

Phosphate (PO4) 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 Phosphate (PO4)

Viser de 30 bedst understøttede toppe ud af 606 i alt for Phosphate (PO4).

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

• 960 cm⁻¹ tillid 1,0

  “cm-1 Additional peaks were found in both models at 1,062, 1,053, 1,047, 1,040, and 1,029 b cm-1) cm-1 m The peak width range was restricted to the width of the sample's phosphate peak (at 960 ± 2 1 c Chi-squared is the weighted difference b”

  Awonusi 等 - 2007 - Carbonate assignment and calibration in the raman DOI: 10.1007/s00223-007-9034-0
• 960 cm⁻¹ tillid 1,0

  “5 highlights that the first two IR bands, assigned to the cm-1 cm-1, Mo-O-Mo vibrational modes, are up-shifted from 792 and 870 to 800 and 887 while the last two IR cm-1 Mo=O bands attributed to the and P-O vibrational modes are down-shifte”

  Baibarac 等 - 2019 - Adsorption of 1,4-phenylene diisothiocyanate onto DOI: 10.1038/s41598-019-48314-x
• 873 cm⁻¹ tillid 1,0

  “Thus, the most important requirements of vibration of the hydroxyl group whereas the peaks at 43(cid:1) cm(cid:1)1 cm(cid:1)1 molecular miscibility and homogeneity of the PC/n-HA was .19 1093 and 603 belong to PO In the composite, 42(cid:1)”

  Banerjee 和 Balasubramanian - 2015 - Nanotexturing of PCn-HA nanocomposites by innovat DOI: 10.1039/c4ra15488f
• 1456 cm⁻¹ tillid 1,0

  “LLM confirmed rule peak-group candidate”

  XRD and FTIR study of A&B type carbonated hydroxyapatite extracted from bovine bone DOI: 10.1063/1.5089399
• 1024 cm⁻¹ tillid 1,0

  “LLM confirmed rule peak-group candidate”

  A rapid method for fungal assisted algal flocculation: Critical parameters & mechanism insights DOI: 10.1016/j.algal.2016.10.022
• 1050 cm⁻¹ tillid 1,0

  “LLM confirmed rule peak-group candidate”

  Development of Composite Scaffolds Based on Cerium Doped-Hydroxyapatite and Natural Gums—Biological and Mechanical Properties DOI: 10.3390/ma12152389
• 1084 cm⁻¹ tillid 1,0

  “The vibration around 1232 is assigned to PO antisymmetric stretching of cm-1 2phosphodiesters while the vibration ~1084 is assigned to PO symmetric stretching of phosphodiesters.”

  Fourier transform infrared microspectroscopy detects biochemical changes during C. elegans lifespan DOI: 10.1016/j.vibspec.2019.04.005
• 959 cm⁻¹ tillid 1,0

  “The predominate peak at cm-1 reflection (ATR)/Fourier transform 959 due to the stretching mode infrared (FTIR) and confocal Raman of phosphate was also found in the microspectroscopies were used to Raman spectrum of corneal calcified Taipei”

  Chen 等 - 2006 - Corneal calcification chemical composition of cal DOI: 10.1007/s00417-005-1191-0